HP & Boiler - Reverse shunt in return - HP on/off control
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Working principle
The heat pump has a reverse shunt configuration in the return pipe with the boiler. More information about the different configuration possibilities can be found in Hybrid production Heating.
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A Ground Source Heat Pump (GSHP) is used in this template, but an Air Source Heat Pump (ASHP) can also be used, this is further explained in Heat pump.
Notices/Remarks
The user should lock the nominal thermal power and temperatures of the HP. If not, the software will calculate with the propagated power and return temperature from the installation.
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More information about the HP and boiler can be found in Heat pump and Condensing boiler.
HP & Boiler - Reverse shunt in return - HP modulation
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This template is a combination of the previous template “HP & Boiler - Reverse shunt in return - HP on/off control” and the template HP modulation.
The modulating control of the HP can easily be changed to a stage control by replacing the heat pump part with the template HP stages.
HP & Boiler - Reverse shunt in supply - HP on/off control
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The boiler is a reverse shunt configuration in the supply pipe with the heat pump. More information about the different configuration possibilities can be found in Hybrid production Heating.
Furthermore, this template is similar to the previous template “HP & Boiler - Reverse shunt in return - HP on/off control”, except for the activation signal of the boiler combined with the activation signal of the boiler pump.
HP & Boiler - Reverse shunt in supply - HP modulation
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This template is a combination between the previous template “HP & Boiler - Reverse shunt in supply - HP on/off control” and the template HP modulation.
The modulating control of the HP can easily be changed to a stage control by replacing the heat pump part with the template HP stages.
HP & Boiler - Reverse shunt in supply - HP on/off control - LT and HT header separated
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This template is similar to the previous template “HP & Boiler - Reverse shunt in supply - HP on/off control”, except in this case there is a Low Temperature (LT) and High Temperature (HT) header which are separated. The heat required for the HT header is only delivered by the boiler, not the heat pump. The HP will deliver as much heat possible to the LT header, but if the heat delivered by the HP is insufficient, the boiler will deliver the remaining required heat.
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The supplied temperature of the boiler to the LT header is controlled by a 3-way modulating valve. The PI controller of the 3-way valve will make sure the supply temperature is controlled to 45°C. If the supplied temperature of the HP is already 45°C, the threeway valve is closed meaning there wont be any hot water supplied from the boiler. If the supplied temperature of the HP is lower than 45°C, the boiler will deliver the hot water required (in this case at 70°C) to deliver 45°C to the LT header.
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HP & Boiler - Reverse shunt in supply - HP modulation - LT and HT header separated
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This template is a combination between the previous template “HP & Boiler - Reverse shunt in supply - HP on/off control - LT and HT header separated” and the template HP modulation.
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