A global optimal control method for ground source heat pumps
A technology of ground source heat pumps and control methods, applied to heat pumps, refrigerators, refrigeration components, etc., can solve problems such as reduced efficiency, deterioration of heat transfer of unit condensers, and increased energy consumption of heat pumps, achieving remarkable energy-saving effects of water pumps and promoting development Effect
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[0119] For the following ground source heat pump system: two Clement screw heat pump units with a cooling capacity of 1623kW and a heating capacity of 1746kW, the cooling medium of the units is R22, and the temperature of the supply and return water at the user side is 7 / 12°C under the design working conditions in summer , The supply and return water temperature on the user side is 45 / 40°C under the design working conditions in winter. Buried tube heat exchanger The number of boreholes for the underground heat exchanger is 550, all of which are vertical double U-shaped. The design parameters are shown in the table below.
[0120]
[0121]
[0122] Assume that the load on a certain day is:
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[0124] Bringing the above data into the ground source heat pump optimal control method, after modeling, the partial load efficiency curve of the compressor is as follows: Image 6 shown.
[0125] Use the optimization algorithm to calculate the optimal buried side flow a...
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