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Wax is assumed to be 132.66-141.02 $/kWh in He & Setterwall(2002). However the cost can increase significantly when integrated with a system such as a CO2 heat pump system. These costs are difficult to assume because of the complexity and novelty of the system. Hence payback analysis with a range of cost values for storage is tabulated in Table 5-1. Table 5-1. Payback analysis of the system with storage. 46 Payback period (in years) for system for various cost of CO2 heat pump ($/kW) 400 1000 1600 2200 Cost of Paraffin Wax (in $/kWh) Cost of water tank storage($) 47000 2.53 5.81 9.09 12.37 100 2.33 150 2.48 200 2.64 250 2.79 300 2.94 350 3.09 400 3.24 5.37 8.42 5.53 8.57 5.68 8.72 5.83 8.87 5.98 9.03 6.14 9.18 6.29 9.33 11.46 11.61 11.76 11.92 12.07 12.22 12.37 The cost of storage is a small percentage of the whole system. When the cost of CO2 heat pump system is considered low, the cost of the storage system becomes prominent and hence the difference between storage systems become significant. An appropriate comparison between the storage systems can be made with better knowledge of the cost. However, with expected reduction in cost of paraffin wax storage in future, paraffin wax seems to be a more preferable option as a storage system.PDF 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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