Fig. 1. Comparison of CO2 and Freon Refrige-rant (R-134a) Cycles.
Fig. 2. Schematic diagram for Heat Exchanger andUnit Cooler using CO2.
Fig. 3. System for 1 ton Refrigerated Top Car with Natural Refrigerant.
Fig. 4. LNG Cold & Heat Utilization.
Fig. 5. Schematic diagram of a frozen top car using LNG cold heat.
Fig. 6. Heat Exchanger Drawings for CO2 NaturalRefrigerant.
Fig. 7. Unit Cooler Drawings Using CO2 Natu-ral Refrigerant.
Fig. 8. Experiment of Heat Exchanger Using CO2 Natural Refrigerant.
Fig. 9. Unit Cooler Experiment with CO2 Natu-ral Refrigerant.
Fig. 10. CO2 natural refrigerant cooling towervehicle and prototype.
Fig. 11. High pressure piping for 120 bar.
Fig. 12. Renovation of LNG vehicle of existing diesel 5ton refrigerated truck.
Table 1. CO2 Gas Cooler Heat Exchanger Cal-culation
Table 2. CO2 Unit cooler Calculation
Table 3. CO2 Gas Cooler Heat Exchanger Measurement Results
Table 4. Unit Cooler Measurement Results
Table 5. Cooling Load Calculation
Table 6. Cooling system COP measurement result
Table 7. COP measurement results when applying LNG
References
- Didion, D. A. and Bivens, D. B., 1990, "Role of Refrigerant Mixtures as Alternatives to CFCs", International Journal of Refrigeration, Vol. 13, pp. 163-75, (1990) https://doi.org/10.1016/0140-7007(90)90071-4
- Neks. P., Rekstad, H., Zakeri, G.R. and Schiefloe, P.A., 1998, "CO2-heat pump water heater: characteristics, system design and experimental results. Int. J. Refrigeration, Vol. 21, No. 3, pp. 172-179, (1998) https://doi.org/10.1016/S0140-7007(98)00017-6
- Lorentzen G., 1994, "Revival of carbon dioxide as a refrigerant". Int. J. Refrigeration, Vol. 17, No. 5, pp. 292-301, (1994) https://doi.org/10.1016/0140-7007(94)90059-0
- Hashimoto, K., Saikawa, M., and Iwatsubo, T., 2000, "Experimental study about heat transfer coefficient of CO2 on supercritical condition", 第 37回 日本 熱 シソポヅウム 講演 論文集, pp. pp. 401-02, (2000)
- Pettersen, J., Rieberer, R., and Leister, A., 2000, "Heat transfer and pressure drop characteristics of supercritical carbon dioxide in microchannel tubes under cooling", Preliminary Proceedings of the 4th IIR-Gustav Lorentzen Conference on Natural Working Fluids at Purdue, July 25-28, pp. 99-06, (2000)