PDF Publication Title:
Text from PDF Page: 051
CHAPTER 2: LITERA TURE STUDY 39 Stene (2004) did a study where he compared four different kinds of heat pump designs with each other. The four designs were: 1) Heat pump with condenser and desuperheater; 2) Heat pump with sub-cooler, condenser and desuperheater; 3) Heat pump with suction gas heat exchanger, condenser and desuperheater; and 4) CO2 heat pump with a single counter-flow gas cooler. The first three designs were tested with R-134a and R290 and the last heat pump design used CO2 as a refrigerant. All of the above-mentioned designs were tested at the same conditions and the results were compared. Figure 2.24: Principle schematic of a CO2 heat pump water heater (Stene, 2004). , COMPRESSOR LPR ,1 1 ,! , Hot water consumption (50 to 5500) City water (5 to 250C) , 1____1 EVAPO RATOR HEAT EXCHANGER GAS COOLER PUMP 6Qto 850C SINGLE-SHELL HOT WATER TANK From Stene's results it was evident that the CO2 system had on average a 20% higher COP than the best performed system between systems 1 - 3. This is most likely due to the higher compressor efficiency and the good temperature fit in the gas cooler between the water and CO2. Figure 2.25 shows the calculated COP values for the different heat pump water heating systems as a function of the evaporation temperature. The calculations were based on the assumptions of a total UA-value of 2100 WK for the gas cooler/condensers and evaporators, 5°C inlet water temperature and an outlet water temperature of 70°C (Stene, 2007). A Techno-Economical Analysis of a CO2 Heat Pump. School ofMechanical Engineering, North-West UniversityPDF Image | CO2 HEAT PUMP Analysis
PDF Search Title:
CO2 HEAT PUMP AnalysisOriginal File Name Searched:
co2-heat-pump-techno-analysis.pdfDIY PDF Search: Google It | Yahoo | Bing
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
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |