NOVEL TRANSCRITICAL CO2 HIGH- TEMPERATURE HEAT PUMP

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NOVEL TRANSCRITICAL CO2 HIGH- TEMPERATURE HEAT PUMP ( novel-transcritical-co2-high--temperature-heat-pump )

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NOMENCLATURE Cp specific heat capacity, kJ/kg.K GWP D diameter of the bore inside the cylinder, m HCFC h enthalpy, kJ/kg HFC 𝑚􏰍 mass flow rate, kg/s IHX P pressure, bar ODP Q heating power, kW PID r compresssion ratio RPM 𝑅􏰡 R-Squared value sCO2 t time, seconds VSD T temperature, °C Subscripts ΔT temperature difference, K or °C aux 𝑉􏰍 volumetric flow rate, m􏰣/s comp 𝑉􏰜 displacement rate of the compressor, m3/ s dis 𝑊􏰁􏰂􏰓􏰔 compression work, kW eva Greek symbols gc 𝜂 efficiency heat ηv volumetric efficiency of a CO2 compressor in Global Warming Potential Hydrochlorofluorocarbon Hydrofluorocarbons Internal Heat Exchanger Ozone Depletion Potential Proportional Integral Derivative Revolution Per Minute Supercritical CO2 Variable Speed Drive auxiliary compressor discharge evaporation gas cooler heating inlet Paper ID: 134, Page 8 ν Abbreviations AHU CFC COP FG FSD specific volume, m􏰣/kg Air Handling Unit Chlorofluorocarbon Coefficient of Performance Flash-Gas Fixed Speed Drive isentr isentropic ori original out outlet suc suction super superheat wa water 1to4 refrigerants states REFERENCES Bamigbetan, O, Eikevik, TM, Nekså, P & Bantle, M 2017, 'Review of vapour compression heat pumps for high temperature heating using natural working fluids', International Journal of Refrigeration, vol. 80, 2017/08/01/, pp. 197-211. Bitzer 2019, Bitzer online software, . Bojić, M, Miletić, M & Bojić, L 2014, 'Optimization of thermal insulation to achieve energy savings in low energy house (refurbishment)', Energy Conversion and Management, vol. 84, 2014/08/01/, pp. 681- 90. Bruno, F, Belusko, M & Halawa, E 2019, 'CO2 Refrigeration and Heat Pump Systems—A Comprehensive Review', Energies, vol. 12, no. 15, p. 2959. Chaichana, C, Aye, L & Charters, WWS 2003, 'Natural working fluids for solar-boosted heat pumps', International Journal of Refrigeration, vol. 26, no. 6, 2003/09/01/, pp. 637-43. Chris Riedy, GM, Paul Ryan 2013, Hot water service, . Dadashev, MN & Stepanov, GV 2000, 'Supercritical extraction in petroleum refining and petrochemistry', Chemistry and Technology of Fuels and Oils, vol. 36, no. 1, pp. 8-13. Hepbasli, A & Kalinci, Y 2009, 'A review of heat pump water heating systems', Renewable and Sustainable Energy Reviews, vol. 13, no. 6, 2009/08/01/, pp. 1211-29. Huang, F-H, Li, M-H, Lee, LL, Starling, KE & Chung, FTH 1985, 'AN ACCURATE EQUATION OF STATE FOR CARBON DIOXIDE', Journal of Chemical Engineering of Japan, vol. 18, no. 6, pp. 490- 96. Johns, K 1998, 'Supercritical fluids—a novel approach to magnetic media production?: An introduction to supercritical fluid technologies and how they might be applied to deposition/impregnation of 6th International Seminar on ORC Power Systems, October 11 - 13, 2021, Munich, Germany

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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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