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CHAPTER 8. CONCLUSIONS CO2 heat pump systems are an attractive alternative technology for commercial building applications which have simultaneous heating and cooling demands. Such a system leads to significant energy, cost and environmental benefits. A case study of a data center on Purdue University campus proves that the system is especially advantageous in a data center application. Some of the major conclusions from the analysis are: 2-stage compression with intercooler during the summer months increases the efficiency of the system. Adding an expansion work recovery device improves the primary energy savings by 40%. Increasing the data center supply temperature according to the new ASHRAE guidelines increases the primary energy savings to ~61%. The total annual Coefficient of Performance of the system varies from 4.5 to 8.1 depending on the data center supply temperature Addition of an optimally sized storage system further increases the primary energy savings from ~28% to 33.2% Size and economic analysis shows PCM (Paraffin Wax-RT60) to be a better alternative when compared to water as a TES medium. This is because size is an important factor in commercial buildings. Addition of PCM does not increase the initial cost and payback period considerably. The payback period is approximately between 3 to 4.5 years Environmental analysis shows the decrease in Total Equivalent Warming Impact (TEWI) value by ~36% 51PDF Image | CO2 HEAT PUMPS FOR COMMERCIAL BUILDING APPLICATIONS
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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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