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7.3 Calculation of the Seasonal Performance Factor (SPF) ................ 224 7.3.1 Introduction ....................................................................... 224 7.3.2 Basis of Calculations ......................................................... 225 7.3.3 Results ............................................................................... 226 8. Conclusions and Suggestions for Further Work...............229 8.1 Conclusions ................................................................................... 229 8.1.1 The CO2 Heat Pump Unit ..................................................229 8.1.2 The Domestic Hot Water Tank..........................................231 8.2 Suggestions for Further Work.......................................................231 Nomenclature.......................................................................................233 References ............................................................................................237 APPENDICES Appendix A – CO2 as a Working Fluid in Heat Pumps A1 Physical and Thermophysical Properties ....................................... A1 A1.1 High Operating Pressure ..................................................... A2 A1.2 Heat Rejection at Supercritical Pressure............................. A2 A1.3 Mass Flow Rate and Pressure Drop vs. Dimensions of Pipelines and Components..................................................A4 A1.4 Required Compressor V olume ........................................... A4 A1.5 Compressor Performance.................................................... A4 A1.6 Heat Exchanger Performance ............................................. A5 A2 The Transcritical CO2 Heat Pump Cycle .....................................A10 A2.1 Temperature Gradients During Heat Rejection ................ A10 A2.2 Methods of Controlling the High-Side Pressure ............... A11 A2.3 Optimum High-Side Pressure at Constant CO2 Outlet Temperature from the Gas Cooler .................................... A14 A2.4 Optimum High-Side Pressure when Incorporating Real Gas Cooler Performance ..........................................A19 Table of Contents xixPDF 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
Heat Pumps CO2 ORC Heat Pump System Platform More Info
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