PDF Publication Title:
Text from PDF Page: 112
CHAPTER 4: COMPARISON BETVIEEN R-22 AND CO2 SYSTEM 100 For both heat pump systems the top temperature of storage vessel 1 is kept at a reasonable temperature and the two systems are still able to provide hot water of approximately 50°C to the hotel. Only once does the R-22 system drop to a supply temperature of about 45°C. Therefore it is good to see that at cold ambient conditions the system seems to be keeping up with the hot water demand satisfactory, regardless the fact that the R-22 system drops to 45°C at one point. The ILH system manages to keep the top temperature more constant and is thus keeping up with demand to a higher degree than the two heat pump systems. This is because the ILH is able to be in operation the whole time even for the coldest conditions and it has a bigger heating capacity than the heat pump systems. Therefore if the heat pumps are unable to operate they only have a backup ILH of 48kW, whereas the ILH system has 72kW of heating capacity regardless of the ambient conditions. The most interesting difference between the two heat pump systems is the variation in the storage vessel temperatures. It can be seen that the overall temperature for the CO2 system is a bit higher than that of the R-22 system. with a maximum deviation of 8% in storage vessel 1. The top temperature of storage vessel 1 of the R-22 system drops well below 50°C for two times during the day. From the water temperature profile curves it can be depicted that the CO2 system is keeping up with the demand easier than the R 22 system and it seems that the increase in water temperature of the CO2 storage tanks is faster than it is for the R-22 storage vessels. The ILH system on average keeps the two storage tanks at its desirable temperature better than the heat pump systems do. This can be seen from figure 4.8 where the storage tank of the ILH system has a more constant water outlet temperature. The CO2 system will have a shorter operating time than the R-22 system because it seems the CO2 system is reheating the storage vessels faster than the R-22 system. [t is also known that the COP of the CO2 system is highly dependable on the inlet water temperature and this could also mean that the performance of the system will still be good at winter conditions because of the colder inlet water temperature at the colder ambient conditions. A Techno-Economical Analysis ofa COl Heat Pump. School of Mechanical 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 (Standard Web Page)