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CHAPTER 2: LITERATURE STUDY 23 Figure 2.10: Variation of density as a function of temperature and pressure (Freund, s.a.). OJ -- ~ "-' 1200 1000 Supercriticai Region til 800 E 600 ..0 "0} c Q) 0 400 200 0 0 so 60 90 120 150 180 210 Temperature (OC) , / Vapourizatlon GUlVe () Critical Point - - - Supercrlticaf Boundary Figure 2.11: Variation of Volumetric refrigeration capacity for refrigerants {Kim et al., 2003}. 25000 20000 1~moo 10000 ",# 5000 O~~~-L--~--~~--~--~--~~~~--~--~~~~ -40 -20 o 20 40 100 T[°e] According to Kim et al. (2003), one of the most important characteristics of a super critical fluid near its critical point is that the fluld properties change rapidly as the temperature changes in an isobaric process and especially near the pseudo-critical point (the temperature at which the specific heat becomes a maximum for a given pressure). This phenomenon is shown in Figures 2.12 and 2.13, where the isobaric A Techno-Economical Analysis of a CO2 Heat Pump. School of Mechanical Engineering, North-West UniversityPDF Image | CO2 HEAT PUMP Analysis
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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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