CYPEHVAC

Introduction

CYPEHVAC is a program for designing HVAC systems covering heating, ventilation and air conditioning. This tool is used to design radiators, fan coils, boilers, heat pumps, ducted ventilation networks, heat recovery units, fans and air handling units.

The application can be used to import the necessary information extracted from other Open BIM tools so that both the architectural models and the results of the thermal load analysis can be used in the system design.

"Installation" tab

The "Installation" tab has a work environment that allows the system design to be carried out quickly and easily, both in a 3D view and in any type of 2D view (such as floor plans and elevations). This allows the elements in the system to be entered using the most appropriate view at any given time.

This tab displays the following:   

• The top toolbar contains the tools for managing the project options; entering and editing the elements of the water-air conditioning systems, water-cooled system, air-source heat pump system and water production air conditioning systems; entering direct expansion systems; entering the elements for the air distribution system; and analysing, checking and designing the system.
• The work area, on the right side of the screen, is where the aforementioned elements are entered, edited and displayed.
• On the left-hand side are several panels with tools for defining the project views and managing the visibility of the elements read and own elements.

"Bill of quantities" tab

On the other hand, the "Bill of quantities" tab is used to manage the quantities and cost estimations of the installation, and displays the following:

• A top toolbar containing tools for creating and editing bills of quantities, as well as tools for managing and creating reports.
• A graphic window with its own toolbar, located on the right-hand side, where the different elements of the job can be viewed.
• A specific area for structuring the bill of quantities, on the left-hand side.

The following options are available:

• Design and checks
• Refrigerant concentration limit
• Automatic path
• External conditions
• Internal conditions
• Working fluid
• Drawing symbols

Details of the utilities as mentioned above are given below.

Design and checks

In this section, the criteria for the design of different elements in the installation, such as pipes, ducts and expansion vessels, are configured and certain checks on them are activated.

• Element references
  • Generate references upon analysing (optional)
    • Overwrite previously assigned references (optional)
      
• Pipe design criteria
  • Maximum velocity (m/s)
  • Maximum pressure loss of the span (mwc/m)
  • Equivalent length (%)
    
• Design criteria for the ducts
  • Maximum velocity (m/s)
  • Maximum pressure loss (Pa/m)
  • Allowable dimensions for ducts
    • Dimension (mm)
    • Maximum allowable aspect ratio (n:1)
      
• Expansion tank design criteria
  • System fill pressure (m wcf) (Heating / Cooling)
  • Set pressure of the pressure relief valve (mWh) (Heating / Cooling)
    
• Environmental conditions of the path of the pipes
  • External temperature (ºC) (Heating / Cooling)
  • Internal temperature (ºC) (Heating / Cooling)
    
• Checks
  • Maximum input temperature of the emitters (ºC) (optional)
  • Minimum input temperature of the emitters (ºC) (optional)
  • Maximum percentage of heat loss in the pipes (%)
  • Operating point (tolerance) (ºC)
    

Refrigerant concentration limit

Activates the refrigerant limit charge check depending on the selected building type.

• Check the refrigerant charge limit R-410A (EN378)
• Type of building
  • Category A: Hospital
  • Category B: Household, commercial, teaching, public attendance
  • Category C: Business premises and offices, administrative
  • Category D: Industrial

Automatic path

Sets the distances used by the "Automatic routing (VRF)" option in the "Analysis" group.

• Indoor unit
• Flow unit
• Outdoor unit
• Relative installation height
• Minimum space between rows

External conditions

Defines the outdoor air conditions.

• Outside air
  • Altitude (m)
  • Summer dry bulb temperature (ºC)
  • Summer wet bulb temperature (ºC)
  • Winter dry bulb temperature (ºC)
  • Winter relative humidity (%)
  • Winter wet bulb temperature (ºC)
• Air properties
  • Barometric pressure (mca)

Air density (Calculated/User) (^kg/m3)

Climate data import

Data on outdoor conditions can be imported from the weather database of the American Society for Heating, Refrigerating and Air-Conditioning ASHRAE Weather Data Viewer 6.0 using the corresponding button on the right-hand side of the "External conditions" window.

Internal conditions

Defines indoor air conditions.

• Cooling dry bulb temperature (ºC)
• Relative humidity (%)
• Cooling wet bulb temperature (ºC)
• Heating dry bulb temperature (ºC)

Working fluid

Defines the properties of the working fluid. For this purpose, its reference and its properties at different temperatures are defined:

• Reference
• Table of working fluid properties
  • Temperature (ºC)
  • Density (kg/m3)
  • Specific heat (J/(kg-C))
  • Kinematic viscosity (x 10-6 m2/s)

Users can import predefined values for water and for water with different additives using the wizard on the right:

• Properties of the working fluid
  • Working Fluid (Water / Water with ethylene glycol / Water with propylene glycol)

Catalogue management

This allows manufacturers' catalogues to be downloaded using the connection to the Open BIM Database, making it easier to enter data into the program for project development.

Clicking on this option opens a window with the available manufacturer catalogues.

Using the "Filters applied" option, filters can be applied by element "Category", "Language" and "Country" so that only manufacturers offering product catalogues with these characteristics are displayed.

Catalogue download

The following options are shown for each manufacturer:

• Download
  Downloads the manufacturer's catalogue. The products in the catalogue will be available in the project.
• Update
  Updates the selected manufacturer's catalogue to the latest version, deleting the version downloaded in the project.
• Delete
  Deletes the selected manufacturer's catalogue. The products in the catalogue will no longer be available in the project.

Connection to Open BIM Database

At the bottom of this dialogue box, the program allows users to log in with their Open BIM Database account and password.

Generation equipment of the condensing circuit

Enters a condensing circuit generation unit. This unit represents a heat source, such as a geothermal collector field.

When entering a generating set, the following parameters must be specified:

• Reference
• Design conditions
  • Supply temperature (Cooling (optional) / Heating (optional))
  • Temperature drop (Cooling (optional) / Heating (optional))
  • Pressure loss (Cooling (optional) / Heating (optional))
  • Capacity

Cooling tower

Enters cooling towers.

When entering a cooling tower, the following parameters must be specified:

• Reference
• Design conditions
  • Supply temperature 
  • Temperature drop 
  • Pressure loss 
  • Capacity
• Dimensions
  • Height
  • Width
  • Length

Fan coil

Inserts fan coils (with direct discharge or ducted distribution) for a two-pipe or four-pipe system:

• Fan coil, 2 pipe
• Fan coil, 4 pipe

When inserting a fancoil, the following parameters must be specified:

• Reference
• Catalogue / Selection
  The program selects and imports data from "Manufacturer catalogues", if available, or from the "Library of generic elements" using the wizard available on the right.
• Design conditions
  • Required capacity (optional) (Heating (optional) / Cooling (optional))
  • Required sensible capacity (Cooling (optional))
  • Indoor dry bulb temperature (Heating (optional) / Cooling (optional))
  • Indoor wet bulb temperature (Cooling (optional))
• Assigned thermal loads
  Defines the following percentages on the values of the thermal loads for heating and/or cooling of the project. The program automatically assigns loads according to the arrangement of the terminal elements in the model.
  • % Assigned heating capacity
  • % Assigned total cooling capacity
  • % Assigned sensible cooling capacity
  • % Required heating load
  • % Required total cooling load
  • % Required sensible cooling load

Library of generic fan coils

Within the "Project" group, in the "Library of generic elements" option, the libraries of available 2-pipe and 4-pipe generic fan coil types can be created and edited.

The data associated with each type of 2-pipe or 4-pipe fan coil is as follows:

• Reference
• Description
• Refrigeration (optional)
  • Operating point (Power; Sensible capacity; Inlet temperature; Temperature drop; Indoor dry bulb temperature; Indoor wet bulb temperature; Pressure loss)
  • Capacity tables (Power; Sensible capacity; Pressure loss)
• Heating (optional)
  • Operating point (Power; Inlet temperature; Temperature drop; Indoor dry bulb temperature; Pressure ^loss)
  • Capacity tables (Power; Pressure loss)
• Air distribution (optional)
• If this option is checked, the program considers the fancoil to be a ducted distribution fancoil.
  • Flow/pressure curve
    • Midpoint (Flow rate; Pressure)
    • Point (Flow rate; Pressure)
  • Outlets
    • Inlets
      • Installation
        • Air flow type (Outside air (ODA) / Supply air (SUP))
        • Inlet can be disconnected (optional)
      • Geometry
        • Type (Rectangular / Circular)
        • Width x Height / Diameter
• Dimensions (Height; Width; Length; Position of inlets; Capacity)

Radiator

Enters radiators.

When entering a radiator, the following parameters must be specified:

• Reference
• Selection
• The program can select and import data from the "Library of generic elements" using the wizard on the right-hand side.
• Number of elements
• Design conditions
  • Required capacity (optional)
  • Indoor dry bulb temperature
• Assigned thermal loads
• Defines the following percentages on the values of the heating thermal loads of the project. The program automatically locates loads according to the arrangement of the terminal elements in the model.
  • % Assigned heating capacity
  • % Required cooling load

Library of generic radiators

Within the "Library of generic elements" option, in the "Project" group, the available libraries of generic radiator types can be created and edited.

The data associated with each type of radiator is as follows:

• Reference
• Description
• Heating, by element
  • Power (ΔT=50ºC)
  • Exponent n
  • Pressure loss
• Dimensions (Height; Length; Capacity)

Towel rail radiator

Enters towel rail radiators.

To enter a towel rail radiator, the following parameters must be specified:

• Reference
• Selection
• The program can select and import data from the "Library of generic elements" using the wizard on the right-hand side.
• Number of elements
• Design conditions
  • Required capacity (optional)
  • Indoor dry bulb temperature
• Assigned thermal loads
• Defines the following percentages on the values of the heating thermal loads of the project. The program automatically locates loads according to the arrangement of the terminal elements in the model.
  • % Assigned heating capacity
  • % Required cooling load

Library of generic towel rail radiators

Within the "Library of generic elements" option, in the "Project" group, the available libraries of generic towel rail radiator types can be created and edited.

The data associated with each type of towel rail radiator is as follows:

• Reference
• Description
• Heating, by element
  • Power (ΔT=50ºC)
  • Exponent n
  • Pressure loss
• Dimensions (Height; Length; Capacity)

Air handler

Enters air conditioners for a two-pipe or four-pipe system:

• Air handler, 2 pipe
• Air handler, 4 pipe

When entering an air handler, the following parameters must be specified:

• Reference
• Selection
• The program selects and imports data from the "Library of generic elements" using the wizard available on the right hand side.
• Description
  • Type (All air system, constant volume / All air system, variable volume)
  • Cooling coil (optional in "Air handling unit, 2-pipe")
  • Heating coil (optional for "Air handling unit, 2-pipe")
  • Supply fan
  • Return fan
  • Air to air recovery system (optional)
    • Type (Sensible / enthalpy)
    • Efficiency (%)
  • Outdoor air
    • Pre-filter
• Design parameters
  • Outside air flow
  • Exhaust air flow

Library of generic air handlers

In the "Library of generic elements" option, within the "Project" group, the libraries of available generic 2-pipe and 4-pipe air conditioning unit types can be created and edited.

The data associated with each type of 2-pipe or 4-pipe air conditioner are as follows:

• Reference
• Description
• Cooling (optional for "Air handler, 2 pipe")
  • Operating point (Power; Sensible power; Inlet water temperature; Temperature drop; Inlet air dry bulb temperature; Inlet air wet bulb temperature; Pressure loss)
  • Capacity tables (Power; Sensible capacity; Pressure loss)
• Heating (optional on "Air conditioner, 2 pipes")
  • Operating point (Power; Inlet water temperature; Temperature drop; Inlet air dry bulb temperature; Pressure loss)
  • Capacity tables (Power; Power output; Pressure drop)
• Fan
  • Flow/pressure curve
    • Midpoint (Flow; Pressure)
    • Point (Flow; Pressure)
  • Outlets
    • Inlets
    • Installation
      • Type of air flow (Outside air (ODA) / Supply air (SUP) / Extract air (ETA) / Exhaust air (EHA))
      • Inlet can be disconnected (optional)
    • Geometry
      • Type (Rectangular / Circular)
      • Width x Height / Diameter
• Dimensions (Height; Width; Length; Position of inlets; Capacity)

Radiant floor manifold

Enters radiant floor manifolds.

When entering a radiant floor manifold, the following parameters must be specified:

• Reference
• Design conditions
  • Power (Cooling (optional) / Heating)
  • Minimum inlet temperature (Heating)
  • Maximum inlet temperature (Cooling (optional))
  • Pressure loss (Cooling (optional) / Heating)
  • Volume of water supplied (Heating)
• Thermal loads assigned
• Defines the percentages assigned to the equipment on the values of the thermal loads of the project. The program automatically assigns loads according to the arrangement of the terminal elements in the model.

DHW exchanger

Enters DHW heat exchangers.

When entering a DHW heat exchanger, the following parameters must be specified:

• Reference
• Design conditions
  • Power
  • Pressure loss
  • Capacity

DHW cylinder

Enters DHW exchangers.

When entering a DHW exchanger, the following parameters must be specified:

• Reference
• Design conditions
  • Power
  • Pressure loss
  • Water volume in the exchanger
• Dimensions
  • Diameter
  • Height

Fittings

Enters fittings for the water distribution system.

When entering fittings, the following parameters must be specified:

• Reference
• Selection
  The program selects and imports data from the "Library of generic elements" using the wizard on the right-hand side.

Library of generic fittings

The "Library of generic elements" option, within the "Project" group, is used to create and edit the libraries of available generic fitting types.

The data associated with each type of fitting is as follows:

• Reference
• Description
• Graphical representation
  Accesses the symbol library available from "General options" via "Symbols for drawings" in the "Project" group of the general interface.
• Element pressure drop (Flow coefficient, Kv / Localised pressure loss)

Accumulator tank

Inserts accumulator tanks.

When entering accumulator tanks the following parameters must be indicated:

• Reference
• Selection
  The program selects and imports data from the "Library of generic elements" using the wizard on the right-hand side.

Library of generic accumulator tanks

The "Library of generic elements" option, within the "Project" group, is used to create and edit the libraries of available generic accumulator tank types.

The data associated with each type of accumulator tank is as follows:

• Reference
• Description
• Characteristics
  • 2 outlets (Capacity; Pressure loss)
  • 4 outlets (Capacity; Pressure loss, primary circuit; Pressure loss, secondary circuit)
• Dimensions (Diameter; Height; Inlet position)

Pump

Inserts circulation pumps.

When entering a pump, the following parameters must be specified:

• Reference
• Selection
  The program selects and imports data from the "Library of generic elements" using the wizard on the right-hand side.

Library of generic pumps

The "Library of generic elements" option, within the "Project" group, is used to create and edit the libraries of available generic fitting types.

The data associated with each type of pump is as follows:

• Reference
• Description
• Flow/pressure curve
  • Midpoint (Flow; Pressure)
  • Dotted (Flow; Pressure)
• Dimensions (Height; Width; Length; Inlet position)

Library of generic heat exchangers

The "Library of generic elements" option, within the "Project" group, is used to create and edit the libraries of available generic fitting types.

The data associated with each type of heat exchanger is as follows:

• Reference
• Description
• Characteristics
  • Power
  • Performance
  • Capacity
  • Pressure loss (Localised pressure loss / Flow coefficient, Kv / Depending on the flow rate)

Expansion tank

Inserts expansion tanks.

When entering an expansion tank, the following parameters must be specified:

• Reference
• Type
  • Open
    Tank expansion vessel open to atmosphere.
  • Closed
    Closed tank expansion vessel, containing a volume of air and water in contact with each other.
• Diaphragm
  A diaphragm tank expansion vessel, which has a flexible inner membrane separating air and water.

By clicking on "Calculate", the program collects the minimum and maximum temperature and the volume of fluid in the system from the associated installation and provides the required capacity of the expansion tank according to its type.

Indoor hydraulic unit

Enters indoor hydraulic units.

A hydronic indoor unit is a commercially available unit that brings together all the hydraulic fittings required in domestic aerothermal systems, such as the circulation pump, expansion tank or storage tank, under the same housing.

This means that to use these fittings, only this unit needs to be connected between the air-to-water heat pump and the circuit inside the building.

When entering a hydraulic indoor unit, the following parameters must be specified:

• Reference
• Selection
  The program selects and imports data from the "Library of generic elements" using the wizard on the right-hand side.
• Operating mode (Cooling (optional); Heating (optional))

Library of generic hydraulic indoor units

The "Library of generic elements" option, within the "Project" group, is used to create and edit the libraries of available generic fitting types.

The data associated with each type of hydraulic indoor unit are as follows:

• Reference
• Description
• Cooling (optional)
  • Pressure drop (Localised pressure loss / Flow coefficient, Kv / Depending on the flow rate)
• Heating (optional)
  • Pressure drop (Localised pressure loss / flow coefficient, Kv / Depending on the flow rate)
• Hydraulic unit
  • Circulation pump (optional)
    • Midpoint (Flow rate; Pressure)
    • Point (Flow rate; Pressure)
  • Expansion vessel (optional)
    • Type (Open / Closed / Diaphragm)
    • Capacity
  • Inertia Accumulator (optional)
    • Capacity
• Dimensions (Height; Width; Length; Position of inlets; Capacity)

Hydraulic separator

Inserts hydraulic separators. This element allows the installation to be divided into independent circuits. The program calculates the pressure losses in each of these circuits separately.

When entering a hydraulic separator, the following parameters must be specified:

• Reference
• Number of secondary circuits
• Pressure loss
• Capacity

Manifold

Enters manifolds.

When entering a manifold, the following parameters must be specified:

• Reference
• Number of inlets
• Number of outlets
• Pressure loss
• Capacity

Water pipe

Water pipes can be entered in any direction by drawing them freely in any view of the model.

When entering a pipe, the following parameters must be specified:

• Reference
• Pipe selection
• The program selects and imports data from "Manufacturer catalogues" or from the "Library of generic elements" using the wizard on the right-hand side.
  • Catalogue
  • Series
  • Diameter
• Selection of pipe insulation
• The program selects and imports data from the "Library of generic elements" using the wizard on the right.
  • Insulation
  • Dimensions
• Design conditions
  • Operating mode (Cooling (optional); Heating (optional))
  • Simultaneity (Cooling; Heating)
  • Circuit (Supply (optional) / Return (optional))
  • Outside temperature (Outdoor (optional) / Indoor (optional))

In the "Library of generic elements" option, within the "Project" group, the available generic pipe and insulation libraries can be created and edited.

Pipe library

The data associated with each type of pipe is as follows:

• Reference
• Description
• Material
  • Absolute roughness
  • Thermal conductivity
• Diameters (Reference; Nominal diameter; External diameter; Thickness)

Insulation library

The data associated with each type of insulation is as follows:

• Reference
• Description
• Material
  • Thermal conductivity
• Diameters (Reference; Internal diameter; Thickness)

Vertical pipe

Inserts vertical pipes using the elevation of the plan views of the model as a support.

By clicking on this option, the program defines the characteristics of the pipe by means of an editing panel identical to the one that appears when using the "Pipe" option.

Then, in the "Properties - Vertical pipe" dialogue box, the level associated with the "End point" of the pipe is defined, together with a "Displacement" above the indicated level, expressed in positive or negative values. The starting point of the pipe is marked with the cursor on a point in the work area.

The pipe is then laid out from the working plane elevation of the active view, where the starting point has been marked, to the elevation defined by the selected level and the offset indicated in the dialogue box.

Pipe based on the existing pipe

This option inserts new pipes by taking the data from an existing pipe in the model.

To do this, first select the pipe from which the information will be extracted and accept the editing panel. The new pipe is then inserted into the model at the desired position.

Fan

Enters fans.

When entering a fan, the following parameters must be specified:

• Reference
• Catalogue / Selection
  The program can select and import data from "Manufacturer catalogues" or from the "Library of generic elements" using the wizard on the right-hand side.

Library of generic fans

In the "Library of generic elements" option, within the "Project" group, the available library of generic fans can be created and edited.

The data associated with each type of fan is as follows:

• Reference
• Description
• Flow/pressure curve
  • Midpoint (Flow; Pressure)
  • By points (Flow; Pressure)
• Dimensions
  • Height
  • Width
  • Length
  • Spigots
    • Connections
    • Installation
      • Type of air flow (Outside air (ODA) / Supply air (SUP) / Exhaust air (ETA) / Discharge air (EHA) / Depending on the type of installation)
      • The spigot can remain disconnected (optional)
    • Geometry
      • Type (Rectangular / Circular)
      • Width x Height / Diameter

Heat recovery unit

Enters heat recovery units.

When entering a heat recovery unit, the following parameters must be specified:

• Reference
• Catalogue / Selection
  The program can select and import data from "Manufacturer catalogues" or from the "Library of generic elements" using the wizard on the right-hand side.

Library of generic heat recovery units

In the "Library of generic elements" option, within the "Project" group, the available library of generic heat recovery units can be created and edited.

The data associated with each type of heat recovery unit are as follows:

• Reference
• Description
• Flow/pressure curve
  • Midpoint (Flow; Pressure)
  • By points (Flow; Pressure)
• Dimensions
  • Height
  • Width
  • Length
  • Spigots
    • Connections
    • Installation
      • Type of air flow (Outside air (ODA) / Supply air (SUP) / Exhaust air (ETA) / Discharge air (EHA) / Depending on the type of installation)
      • The spigot can remain disconnected (optional)
    • Geometry
      • Type (Rectangular / Circular)
      • Width x Height / Diameter

Fire damper

Inserts fire dampers.

When entering a fire damper, the following parameters must be specified:

• Reference
• Selection
  The program can select and import data from "Manufacturer catalogues" or from the "Library of generic elements" using the wizard on the right-hand side.

Library of generic fire damper

In the "Library of generic elements" option, within the "Project" group, the available library of generic fire dampers can be created and edited.

The data associated with each type of fire damper is as follows:

• Reference
• Description
• Dimensions
  • Length x Width x Height
  • Position of the inlets
    • Sockets
      • Type (Rectangular / Circular)
      • Width x Height / Diameter
• Design values, depending on the flow
  • Velocity; Pressure loss

Strainer

Enters strainers.

When entering a strainer, the following parameters must be specified:

• Reference
• Catalogue / Selection
  The program can select and import data from "Manufacturer catalogues" or from the "Library of generic elements" using the wizard on the right-hand side.

Library of generic strainers

In the "Library of generic elements" option, within the "Project" group, the available library of generic strainers can be created and edited.

The data associated with each type of filter is as follows:

• Reference
• Description
• Air flow rate
• Pressure
• Dimensions
  • Length x Width x Height
  • Position of inlets
    • Inlets
      • Type (Rectangular / Circular)
      • Width x Height / Diameter

Flow regulators

Enters flow regulators.

When entering a flow regulator, the following parameters must be specified:

• Reference
• Catalogue / Selection
  The program can select and import data from "Manufacturer catalogues" or from the "Library of generic elements" using the wizard on the right-hand side.

Library of generic flow regulators

In the "Library of generic elements" option, within the "Project" group, the available library of generic flow regulators can be created and edited.

The data associated with each type of flow regulator is as follows:

• Reference
• Description
• Dimensions
  • Length x Width x Height (m)
  • Position of inlets
    • Inlets
      • Type (Rectangular / Circular)
      • Width x Height / Diameter
• Design values, depending on the flow
  • Air flow rate; Pressure loss

Silencer

Enters silencers.

When entering a silencer, the following parameters must be specified:

• Reference
• Catalogue / Selection
  The program can select and import data from "Manufacturer catalogues" or from the "Library of generic elements" using the wizard on the right-hand side.

Library of generic silencers

In the "Library of generic elements" option, within the "Project" group, the available library of generic silencers can be created and edited.

The data associated with each type of silencer is as follows:

• Reference
• Description
• Dimensions
  • Length x Width x Height (m)
  • Position of inlets
    • Inlets
      • Type (Rectangular / Circular)
      • Width x Height / Diameter
• Design values, depending on the flow
  • Air flow rate; Pressure loss

Plenum

Inserts plenums in duct systems.

When entering a plenum, the following parameters must be specified:

• Reference
• Catalogue / Selection
  Selects and imports data from previously loaded manufacturer's catalogues using the "Catalogue management" option.
• 3D Model
• Three-dimensional visualisation of the selected equipment.

Initial point of the duct pre-installation

This allows the initial point of a duct pre-installation to be placed in the program. In this way, the ductwork does not need to be connected to a machine or ventilation equipment for the analysis to be carried out.

Generate fittings

Automatically generates the fittings in the air ducts. In doing so, the length of the duct sections reaching each fitting is adjusted.

For this purpose, the most appropriate type of fitting, whether elbows, transitions or branches, is sought and arranged according to the situation.

The generation of fittings is also integrated in the process that launches the "Design" option.

Delete fitting

This deletes the fittings. In doing so, the duct sections are lengthened so that they are not disconnected, thus taking the place of each eliminated connection.

Elbow

Enters an elbow.

When entering an elbow the following parameters must be specified:

• Reference
• Generic
  Defines a generic connection.
  • Catalogue / Material / Selection
    Selects and imports duct data from "Manufacturer catalogues" or from the "Library of generic elements" using the wizard on the right.
  • Type
    • Rectangular
    • Circular
• Manufacturer catalogues
  Selects and imports fittings from manufacturer catalogues using the wizard on the right.
  • Catalogue / Selection

Transition

Enters a transition.

When entering a transition the following parameters must be specified:

• Reference
• Generic
  Defines a generic connection.
  • Catalogue / Material / Selection
    Selects and imports duct data from "Manufacturer catalogues" or from the "Library of generic elements" using the wizard on the right.
  • Type
    • Rectangular - Rectangular
    • Rectangular - Circular
    • Circular - Rectangular
    • Circular - Circular
• Manufacturer catalogues
  Selects and imports fittings from manufacturer catalogues using the wizard on the right.
  • Catalogue / Selection

Double branch

Enters a double branch.

When entering a branch the following parameters must be specified:

• Reference
• Generic
• Defines a generic connection.
  • Catalogue / Material / Selection
    Selects and imports duct data from "Manufacturer catalogues" or from the "Library of generic elements" using the wizard on the right.
  • Type
    • Rectangular
    • Circular
• Manufacturer catalogues
  Selects and imports fittings from manufacturer catalogues using the wizard on the right.
  • Catalogue / Selection

Triple branch

Enters a triple branch.

When entering a branch the following parameters must be specified:

• Reference
• Generic
  Defines a generic connection.
  • Catalogue / Material / Selection
    Selects and imports duct data from "Manufacturer catalogues" or from the "Library of generic elements" using the wizard on the right.
  • Type
    • Rectangular
    • Circular
• Manufacturer catalogues
  Selects and imports fittings from manufacturer catalogues using the wizard on the right.
  • Catalogue / Selection

Rigid duct / Semi-flexible duct / Flexible duct

These options allow the insertion of rigid, semi-flexible and flexible air ducts, respectively.

When entering a duct, the following parameters must be specified:

• Reference
• Type of duct
  • Rectangular, custom (only for “Rigid ducts”) / Rectangular section / Circular section
• Catalogue selection
  • Catalogue
  • Material
  • Selection
• Duct dimensions
  • Width x Height (only for “Rectangular, custom”)

Data can be selected and imported from the "Manufacturer catalogues" or the "Library of generic elements" using the assistant available on the right-hand side of the program.

Library of generic elements

In the "Library of generic elements" option, in the "Project" group, generic duct libraries can be created and edited.

The data associated with each type of duct, regardless of whether they are rigid, semi-flexible or flexible, is as follows:

• Reference
• Description
• Roughness coefficient
• Rectangular ducts, custom
  • Reference
  • Thickness
• Rectangular ducts
  • Reference
  • Height
  • Width
  • Thickness
• Circular ducts
  • Reference
  • Diameter
  • Thickness

Duct ends must be connected to other ducts, or ventilation unit or air terminal must be incorporated into the ducts.

If the entire ductwork system has terminal elements and is closed at all ends except one, a "Initial point of the duct pre-installation" must be provided at that end (available in the "Equipment" menu of the "Air distribution" group) so that the program interprets this situation and does not require the addition of a supply air machine.

In the design process, the program analyses the layout and connections of the installation. It categorises the ducts as "Supply air (SUP)" (blue), "Discharge air (EHA)" (red), "Exhaust air (ETA)" (yellow) or "Outdoor air (ODA)" (green) and displays them with the colour that determines their category. This category can also be seen in the information text that appears when hovering over each duct.

Move labels

Moves the labels of the elements in the system.

Show/hide label

Activates or deactivates the visibility of the labels of the selected elements in the system.

Show/hide labels

Activates or deactivates the visibility of labels for all elements in the system.

Importing thermal loads from the BIM mode

CYPEHVAC can import the thermal loads per space calculated in programs such as CYPETHERM LOADS from the BIMserver.center project information.

These loads are represented in the model view by specific symbols, which are visible if the corresponding layer is activated in the "Own elements" panel, located by default on the left-hand side (by accessing "Imported requirements" and "Thermal loads").

Entering and editing thermal loads

Thermal loads can be entered and edited directly in CYPEHVAC using the table accessible from the "Assign" or "Edit" icons in the "Thermal loads" group in the upper toolbar.

Loads can be defined with a total value or by their value per unit area:

• Total thermal load (kW)
• Thermal load per unit area (W/m2)
  • Area

The following parameters can be defined for cooling loads and heating loads:

• Cooling
  • Total cooling load
  • Sensible cooling load
  • Indoor design temperature
  • Relative humidity
• Heating
  • Heating load
  • Indoor design temperature

Assigning thermal loads

Automatically assigning heat loads

If a thermal load is imported into a space defined in the BIM model and there are one or more terminal elements in that space (e.g. radiators), the program performs the load assignment automatically.

The combined power of these elements will appear as "Installed power" in the thermal load of the space, so the program can check if it is enough to cover the load.

Manually assigning heat loads

If necessary, a percentage of the thermal loads of the spaces (either loads read from the BIM model or loads entered directly into the program) can also be manually assigned to the desired equipment using the "Assign" icon in the "Thermal loads" group in the upper toolbar or by editing each element and using the options in the "Assigned thermal loads" section.

This option is useful if the terminal elements in each space are not entered, e.g. if in a ducted fan coil or air conditioning system the air distribution system is not modelled.

Required capacity

If the "Required capacity" option in the equipment editing panel is activated, the power required to be covered by the equipment is defined directly. This power requirement can be entered in such a way that it is equivalent to the thermal load of the space and can be different from the nominal power of the equipment.

If the "Power requirement" option is deactivated, the system is sized at rated power.

This affects the flow rate of the water pipes leading to the equipment, and also affects the requirements of the generating equipment, such as heat pumps or boilers.

Update results

Checks whether the parameters that have been entered to analyse the system are within the allowed ranges.

The result is a direct display with error or warning messages on the elements that present a problem in the check, in addition to the results and reports available after the analysis in the "Results and checks" section of the edit panel of each element.

Design

Designs the system, i.e. it automatically selects the size of the elements.

In the editing panel of some elements, the program also allows the partial design with the corresponding tool in the lower right-hand area.

Checking the results on screen

After the analysis, CYPEHVAC displays the results in the tooltip or information text that appears when the cursor is positioned on an element in the system, and the compliance of the checks carried out on it. To do this, the "Show information texts" option in the top right-hand toolbar must be checked.

Results and checks

The program also displays the "Results and checks" of the last analysis carried out in the corresponding section of the edit panel of each element, as well as its compliance status.

Graphical analysis of results

By means of the "Graphical analysis of results" option in the "Results" group of the main toolbar, the analysed values of different magnitudes are displayed by colouring the sections of the water distribution system.

By default, the program displays the minimum and maximum values of each factor obtained in the analysis for the entire system. However, the colour scale can be adjusted according to the specific ranges of minimum and maximum values defined in the corresponding dialogue box.

The results available in the graphical analysis of results are as follows:

• Worst case path, cold water
• Worst case path, hot water
• Flow
• Pressure loss of the span
• Velocity
• Thermal insulation thickness
• Linear heat flow
• Hot water temperature
• Cold water temperature

Show/Hide incidents

If this option is activated, the elements in which an error has occurred are highlighted. By positioning the cursor on these elements, the message describing the error can be displayed.

Job reports

The program can print the reports directly or generate HTML, PDF, TXT, RTF or DOCX files.

Reports are obtained via the "Reports" option in the "Results" group of the main toolbar.

• Water distribution
  Displays a report with the analysis results of the water distribution system. The data for the following elements are included:
  • Generators
  • Emitters
  • Fittings
  • Distribution

• System-specific reports
  Each of these reports shows specific information on the following systems entered in the model:
  • VRF
  • Split 1x1
  • Multisplit
  • Air-source heat pump

• Air distribution
  Displays a report with the analysis results of the air distribution system. The data for all ducts and nodes are organised by air duct sections in a table including the following information:
  • Reference
  • Type
  • Flow
  • Diameter equivalent
  • Dimensions (Width, Height)
  • Velocity
  • Length
  • Linear pressure loss
  • Total pressure loss
  • Accumulated pressure loss
  • Material

• Most unfavourable sections
  Displays a specific report of the most unfavourable air duct runs for each independent tree in the system.

• Materials
  Displays the table of materials with the measurement of the elements arranged in the system.

• Drawings
  With this option, the program can print drawings as reports, so they can be integrated and exported as another document.

Document configuration

To create documents that incorporate the information of several selected reports together, the "Document configuration" option is used. It allows the following data to be configured:

• Title
• Description
• Page header (optional)
  • Project; Location; Developer; Author; Date
• Reports to be included

The document created is printed using the "Document" option.

The "Document styles" can also be modified using the corresponding option.

System diagram

By using the "Diagram" option in the "Results" group of the main toolbar, the program generates and displays the diagram of the direct expansion systems.

These diagrams can be incorporated into the job drawings.

Control diagram of the system

By using the "Control diagram" option in the "Results" group of the main toolbar, the program generates and displays the control diagram of the VRF systems.

The control diagram can also be incorporated into the job drawings.

Drawings in DWG, DXF or PDF format

The program can print the drawings of the job on any graphic peripheral configured on the computer, or create DWG, DXF or PDF files.

The following options can be configured when editing drawings:

• Views to be drawn
• Options
  • Generate vector images
  • Draw the DXF/DWG template
  • Include .glTF files in the drawings
• Scale
• Details

The drawings can be obtained via the "Drawings" option at the top of the interface or via the "Reports" option in the "Results" group of the main toolbar.

Update

Update information contained in models previously imported into the project or import new models if desired.

Share

Exports the information of the system developed with CYPEHVAC to BIMserver.center to share it with other users, including the quantities and analysis reports of the system.

During the export process you can define information related to the identification of the files to be exported and the types of files that are generated:

• Name
• Description
• Additional files
  • Reports (optional)
  • DXF/DWG drawings (optional)