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| Image 1: Heat pump | Image 2: Booster heat pump |
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When you open the downloaded COP table you notice that the first column represents the inflow temperature of the evaporator, the second column the outflow temperature of the condenser, and the third column the COP. Adjusting the power table is done in a similar way as the COP table, the difference is that now the 3rd column represents the electric power. Below you can see a completed COP table and power table according to the manufacturing datasheet above.
Image 4: COP table example
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When the heat pump uses a modulation between one or two compressors, the user needs to adjust both CSV files with the corresponding information in the manufacturing datasheet of the heat pump. Below you can see a completed power table with modulation of 50% or 1 compressor and modulation of 100% or 2 compressors. For simulation the user needs to make an external control loop that is connected to the activation signal of the heat pump, this needs to be a signal of 0,5 (use of one compressor) or 1 (use of two compressors).
When the heat pump has a continuous modulation between 20% and 100%, the user also needs to adjust the CSV files corresponding with the minimum and maximum modulation. Below you can see a completed power table with a continuous modulation between 20% and 100%. For simulation, the user needs to provide a continuous control signal (for example the manipulated value of a PI-controller) to the activation signal of the heat pump. Depending on the incoming signal, the COP and electrical power are interpolated between the minimum and maximum modulation.
Image 6: Power table example with modulation with one or two compressors. Image 7: Power table example with continuous modulation.
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With an ASHP for instance, the manufacturer typically gives the thermal power with the following quotation "A7/W35" which means an (A) air temperature of 7°C (evaporator side) and a (W) water temperature of 35°C (condenser side). For a GSHP on the other hand, the quotation is typical "G0/W35". With this information, the thermal power with the corresponded temperatures is implemented in the table and the remaining values in the table (with other temperatures) are scaled with the reference thermal power.
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