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CHA.PTER 5: ECONOMICAL COWARISON BETWEEN ILH, R-22 AND CO2 SYSTEM 122 the operating costs will become more substantial between the two heat pump systems. Therefore the CO2 heat pump system has a substantial advantage because of its lower operating cost and lower energy usage. Figure 5.5: Operating cost over a period often years. 2,OXI,OXI.CO ; - - - - - - - - - - - - - - - - - - - - - - - - - - - - , 1.BCO. OXI. CO 1,6CXl,OXI.CO i 1,4CO,0XI.CO+ ------------------+ --------1 i g: 1.2CO.0XI.CO-r-'-----------------;r-------------l ~g ' 1 . O X I , O X ! . C O I8CO,0XI.CO+------------,.''------------------1 6CXl, OXI. co 4CO,OXI.CO +-------:fIr-------:;7''''''=.-'''------'-~-----' 2CO,OXI.00 + - - - - - ; r " - - - - - - = - - s - = - - - - - - - - - - - - - - - - - - - 1 O.CO + - - - - - - - , - - - - - - - - r - - - - - - , , - - - - - - . . . - - - - - , - - - - - - - 1 •'0'.- 2 4 6 8 10 12 Y ear The energy cost tariff is taken as was found from the tariff rates, an increase in the tariff rates is taken to be 25% for the first two years and then 10% thereafter. This is from a prediction made for the increase in tariff rates for South Africa over the following years. Figure 5.5 shows the total operating cost for the first year and the accumulated operating cost for the years to follow including the increase in tariff rates for a period of ten years. Therefore with the increase in tariff rates taken into account the operating cost alone for the CO2 heat pump system will be R3, 030,781.71 for ten years. The operating cost for the R-22 heat pump system and ILH system will be R3, 440,951.12 and R8, 879,414.04 respectively. A Techno-Economical Analysis ofa COl Heat Pump. School of Mechanical Engineering, North-West UniversityPDF Image | CO2 HEAT PUMP Analysis
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