This configuration is interesting for instance with Air -sourced heat pumpsSource Heat Pumps (ASHPs), for which performance at negative tempertarures temperatures (°C) are too low or experience a lot of transients due to heat pump defrosting. During normal operation, the heat pump could be the only one who is working and at negative temperatures the boiler could be activated in order to guarantee the necessary supply temperatures.
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The serial configuration is activated, meaning the heat will be extracted from the heat pump storage tank, when the return temperature of the system is 2 degrees lower than the upper temperature of the storage tank. It is deactivated when the return temperature is 2 degrees higher than the upper temperature of the storage tank. This hydraulic connection has as a consequence that there is only flow from the heat pump storage tank to the boiler if the controleable controllable 3-way valve is activated.
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There are default COP and power tables for the heat pump, but these can be changed by the user.
The user can change the design temperatures, thermal power, end units, … But keep in mind that the controls have to be changed as well. This can be done by changing the setpoint values.
If the user changes the power of the end - units, the thermal capacity of the heat pump doesn’t change automatically. The user should implement a correct condenser capacity corresponded with the thermal power of the condenser. The same goes for the capacity of the boiler.
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This template is a combination of the previous template “HP & Boiler - Switchable serial in return - HP on/off control” and the template Air Source Heat Pump modulation- Modulating.
The modulating control of the HP can easily be changed to a stage control by replacing the heat pump part with the template Heat Pump stages.
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There are default COP and power tables for the heat pump, but these can be changed by the user.
The user can change the design temperatures, thermal power, end units, … But keep in mind that the controls have to be changed as well. This can be done by changing the setpoint values.
If the user changes the power of the end - units, the thermal capacity of the heat pump doesn’t change automatically. The user should implement a correct condenser capacity corresponded with the thermal power of the condenser. The same goes for the capacity of the boiler.
...
This template is a combination of the previous template “HP & Boiler - Switchable serial in supply - HP on/off control” and the template Air Source Heat Pump modulation- Modulating.
The modulating control of the HP can easily be changed to a stage control by replacing the heat pump part with the template Heat Pump stages.
...
This template is a combination between the previous template “HP & Boiler - Switchable serial in supply - HP on/off control - LT and HT separated” and the template Air Source Heat Pump modulation- Modulating.
The modulating control of the HP can easily be changed to a stage control by replacing the heat pump part with the template Heat Pump stages.