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Chapter No 4 Heat Pump testing at KTH 4.1 CO2 heat pump at KTH (system layout) Energy department of KTH is having a prototype of CO2 heat pump, this is vapor compression cycle based water to water heat pump with heating capacity of 30 kW. The schematic diagram of the system is shown below, HEx 3 IHEx Expansion valve Evaporator HEx 2 CO2 City water Ethylene glycol HEx 1 Figure 18 Schematic of CO2 heat pump at KTH All the heat exchangers (evaporator, gas cooler, internal heat exchanger etc) utilized in this prototype are of plate heat exchangers. With the previous setting the system was having a boundary loop (shown with green color in diagram) and contained ethylene glycol solution, this solution was used as a heat sink on the gas cooler side and the same solution was then used as heating load for the evaporator after its passage through the gas cooler. The small heat exchanger in the boundary loop was helpful in cooling down or warming up the ethylene glycol solution as per requirement. 19 Reciever CompressorPDF Image | heat recovery from R744 based refrigeration system
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CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
Heat Pumps CO2 ORC Heat Pump System Platform More Info
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