Update history

Solutions
CYPETHERM EPlus
Update history

CYPETHERM EPlus

Daikin Altherma Flex aerothermal system

The 2019.d version includes Daikin's "Altherma Flex" range in "Aerothermal-type water-conditioning systems" and "Aerotermal-type DHW systems". The equipment of this range only produce hot water, for heating and/or DHW.

In "Aerothermal-type air conditioning systems", users can choose amongst different indoor and outdoor unit models of the Flex series. This range allows for several indoor units to be connected to a single outdoor unit, as long as the total power of the indoor units lies between 50% and 130% of the power of the outdoor unit.

The Altherma Flex aerothermal equipment must be connected to radiator-type or radiant-floor water conditioning terminal units.

The Altherma Flex range is also available within "Aerothermal-type DHW systems". As with the rest of the aerothermal equipment, if users wish to use an Altherma Flex unit for heating and DHW, the same outdoor unit model must be selected in both sections.

Weather conditions to calculate the SPF of the heat pumps (Improvement of the analysis model of Daikin hot water systems)

In the “Location data” panel, it is possible to select the climatic conditions to calculate the seasonal performance factor (SPF) of the heat pumps, in accordance with Commission Decision 2013/114 / EU, which applies Article 5 of the European Directive 2009/28/EC. According to the EN 16147 standard, these climatic conditions are also applicable when calculating the seasonal coefficient of performance of heat pumps for DHW production “SCOP (DHW)".

Daikin has supplied this coefficient, providing CYPETHERM EPlus with an improved design model of Daikin's DHW systems (aerothermal and heat pump for DHW) by distinguishing between these climate conditions to determine the corresponding value of "SCOP (DHW)" according to the EN 16147 standard.

CYPETHERM RECS Plus also includes this improvement. Although it does not include the possibility of selecting the SPF climate conditions (since Portugal only has warm weather according to Commission Decision 2013/114/EU), the "SCOP (DHW)" value of Daikin's DHW systems (aerothermal and heat pumps for DHW) of CYPETHERM RECS Plus, corresponds to the warm climate zone.

Update of the 2018 Toshiba equipment catalogue

As occurs with CYPETHERM HVAC, some equipment of the Toshiba catalogue has been updated in the 2019.b version of CYPETHERM EPlus and CYPETHERM RECS Plus. This equipment is shown as belonging to the 2018 category in the equipment selection panel.

Daikin water production indoor VRV units

Daikin "Water production" type indoor VRV units, offered by the manufacturer, have been added (New terminal unit > Direct expansion terminal unit > Variable refrigerant flow > Daikin > "Water production" indoor water selection).

Primary air conditioner

A new type of air conditioning equipment has been added: the Primary air conditioner.

The primary air conditioner can be selected in "Air conditioning systems > Air-air conditioning system > Central ventilation system". It is an air conditioner that introduces treated outdoor air into the building. Options for outdoor air conditioning include cooling, heating, humidity control and heat recovery.

The primary air conditioner is connected to the zones defined in the building via the air conditioning terminal unit: "Air discharge terminal" > "Central ventilation system". The primary air conditioner will perform the function of ventilation in areas to which it is connected, therefore these zones must be defined with "Via the air conditioning system" type of ventilation.

FUJITSU Airstage variable refrigerant flow (VRF) systems

The FUJITSU Airstage equipment catalogue has been integrated into CYPETHERM programs with the EnergyPlus engine (CYPETHERM EPlus and CYPETHERM RECS Plus). This way, the number of manufacturers available to users when defining a variable refrigerant flow (VRF) type system is increased.

The FUJITSU logo has been added to the VRF button located in the "Direct Expansion" Air Conditioning Systems. By selecting it, users can choose between the different series and models of FUJITSU Airstage outdoor units, which are completely defined within the program. Similarly, FUJITSU Airstage indoor units can be added via the "VRF" button (New terminal unit > Direct expansion terminal unit > VRF button).

It is not possible to combine indoor and outdoor VRF systems belonging to different manufacturers, neither can manufacturer models with generic unit.

Time with unsatisfied heating and cooling demand

As a result of the energy simulation of the building, the number of hours during the month in which the air conditioning systems have not been capable of overcoming the heating and cooling loads are displayed. This results substitutes the “Useful energy provided for heating and cooling” that was shown previously.

Ventilation using the air conditioning system

Changes required to implement ventilation using the air conditioning systems

The 2019.a version of CYPETHERM RECS Plus and CYPETHERM EPlus allows users to simulate the entrance of outdoor air to ventilate the building via the air conditioning system. In previous versions, the program considered that the air that was required to ventilate the building entered directly via the spaces.

Within each Zone, in the “Ventilation and infiltrations” section, the new variable: “Type of ventilation” appears, where users can choose amongst:

Natural
Is the possibility that existed in program versions up to the 2019.a version to contemplate ventilation.
Mechanical
This type of ventilation was already available in CYPETHERM RECS Plus and as of the 2019.a version, is also available for “CYPETHERM EPlus”. The mechanical ventilation can consider the consumption of the fans associated with this function.
Via the air conditioning system
This type of ventilation is the type that must be chosen to simulate air entering via the air conditioning system associated with the zone.

The “Heat recovery” option has disappeared from the “Ventilation and Infiltrations of the Zone” panel. As of the 2019.a version, heat recovery is defined for the air conditioning systems that can carry out this function, which implies a significant improvement in the design model.

Furthermore, to carry out the ventilation via an air conditioning system, equipment that can carry out this function must be defined in the zone. With this purpose in mind, new options have been habilitated, in the 2019.a version, in “constant performance equipment” and “air-air conditioning systems of the “Rooftop” and “Single-zone AHU””. Heat recovery units have also been included as new equipment.

Heat recovery in constant performance equipment

In “Constant performance equipment”-type terminal units, the “Heat recovery” option has been included, which allows users to simulate the exchange of sensible and latent energy between the renewal and extraction air flow. To do so, users must define the efficiency of this exchange. During the simulation, the constant performance equipment will only recover heat when the indoor air conditions are more favourable than those of the outside air.

Outdoor air inlet in air-air conditioning systems such as Rooftop and Single-zone AHU

Within "Air conditioning systems of constant volume", the "Rooftop" and "AHU" type of single-zone systems have the new option "With outdoor air intake". If users enable this option, the ventilation air of the zones to which this system is connected will enter through it. Additionally, the heat recovery and free cooling functions can be defined for this equipment.

New air conditioning systems: single-zone and multi-zone heat recovery units

As of the 2019.a version, it is possible to simulate sensible and latent heat recovery units, with an external air bypass function. Two versions of this type of equipment have been added: as a terminal unit (single-zone) and as a centralized system (multi-zone).

Within "Terminal Units", users can select the type of "Heat recovery unit". This equipment will be assigned to the zone in which it is defined.

The new category: "Centralized ventilation system" has been added in "Air-air conditioning systems", where users can select the heat recovery equipment. Like the rest of air conditioning systems, this equipment is connected to the zones via the corresponding terminal units. Within air-air conditioning terminal units, the Heat Recovery unit is compatible with the Air discharge terminal.

Daikin heat pumps for hot water

In the “Hot water systems” section, the “Heat pump for hot water” option has been implemented, where users can choose amongst the different models that the manufacturer Daikin has to offer for this type of equipment.

Daikin water-cooled variable refrigerant volume (VRV) outdoor units

New equipment has been added to the Daikin VRV equipment catalogue in CYPETHERM programs with the EnergyPlus analysis engine (CYPETHERM HE Plus, CYPETHERM RECS Plus and CYPETHERM EPlus). As of the 2018.l version, the “Heat pump” and “Heat recovery” versions of Daikin water-cooled VRV outdoor units (series RWEYQ8T9), can be simulated.

Within the Direct Expansion air conditioning systems, in the VRF button, then by clicking on the Daikin logo, users can choose amongst the different series and models of Daikin outdoor VRV units. If a Heat Pump system is selected (2-pipe), the new Water Cooled Heat Pump VRV WIV series appears, and similarly, if a Heat recovery system is selected (3-pipe), the new Water Cooled Heat Recovery VRV WIV series appears.

To simulate a water-cooled VRV system, a water condensation system for heat pumps must be added to the project.

Time period simulations with EnergyPlus™ from CYPETHERM programs

The 2018.l version of CYPECAD MEP and CYPETHERM programs with the EnergyPlus™ analysis engine (CYPETHERM EPlus, CYPETHERM HE Plus and CYPETHERM RECS Plus) allows users to define the simulation of the time period of EnergyPlus. In previous versions, users could only simulate the whole year or two design days.

In the “Analysis” tab of CYPETHERM EPlus or in the “Code verification” tab of CYPETHERM HE Plus and CYPETHERM RECS Plus, the “Calculation options” panel appears when the “Analyse” or “Calculation options” buttons are pressed. The option, “Only simulate the design day” that used to appear in previous versions has been substituted in the 2018.l version by “Simulation period”, where users can define the initial and final day and month of the simulation.

More information on how to select the simulation period in CYPECAD MEP can be found in the “Time period simulation with EnergyPlus™ from CYPECAD MEP” section.

Update to the 8.9 version of the EnergyPlus™ analysis engine

The 2018.l version of CYPETHERM with the EnergyPlus analysis engine uses the new 8.9 version of the engine that was published on the 30th March 2018.

Update history​