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Hot water 2 – Technological Status Tube coil Buffer tank Floor heating system DHW tank Desuperheater Condenser City water Figure 2.6 Principle of a residential heat pump system for space heating and DHW heating. The DHW is preheated and reheated by means of heat from the condenser and the de-superheater. 2.4.3 Technological Status of Residential CO2 Heat Pumps Owing to the favourable environmental and thermophysical properties of carbon dioxide (CO2, R-744), many universities, research institutions and companies have in recent years been analysing and testing various types of residential CO2 heat pump systems. The systems include heat pump water heaters, brine-to-water heat pumps for retrofitting in high-tempe- rature radiator systems, air-to-water heat pumps in low-temperature heat distribution systems, monovalent air heating systems and reversible air-to- air heat pumps (air-conditioners). 2.4.3.1 CO2 Heat Pump Water Heaters Lorentzen (1994) reintroduced CO2 as a working fluid, and demonstrated that the production of DHW is one of the most promising applications for the transcritical CO2 heat pump process. The high energy efficiency of the CO2 heat pump water heater is due to the good temperature fit between the CO2 and the water in the counter-flow gas cooler, the excellent heat 19PDF Image | Residential CO2 Heat Pump System for Combined
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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
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