한국가스학회지 (Journal of the Korean Institute of Gas)

  • 제23권1호
  • /
  • Pages.19-26
  • /
  • 2019
  • /
  • 1226-8402(pISSN)
  • /
  • 2713-6922(eISSN)
한국가스학회 (The Korean Institute of GAS)
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자연냉매인 CO2를 이용한 냉동탑차 냉장시스템과 핵심부품개발에 관한 연구

A Study of Development of Regrigerated Truck Small Scale Cooling System and Key-Part using Natural Refrigerants.

  • 정세진 ((주)삼진야드 기업부설연구소) ;
  • 박성신 ((주)삼진야드 기업부설연구소) ;
  • 민호기 ((주)삼진야드 기업부설연구소) ;
  • 조가영 ((주)삼진야드 기업부설연구소)
  • 투고 : 2018.12.20
  • 심사 : 2019.01.16
  • 발행 : 2019.02.28
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초록

본 연구에서는 친환경적 냉매로 주목받고 있는 이산화탄소 자연 냉매를 이용하여 1톤 크기의 냉동 탑차에 들어가는 냉방 시스템을 개발하고, COP를 올리기 위해 열교환기 및 Unit cooler를 설계하였다. 또한 LNG의 기존 CNG 5톤 냉동탑차를 LNG 차량으로 개조하여 냉방시스템의 효율을 높임과 동시에 CNG 대비 안전성을 확보하였다. 결과적으로 1톤 및 5톤 크기에서 자연 냉매를 사용한 친환경적인 냉동탑차를 개발하였다.

In this study, we developed a cooling system for 1 ton size refrigeration vehicle using carbon dioxide natural refrigerant among hydrocarbon type refrigerant which is attracting attention as environment friendly refrigerant, and designed a heat exchanger and a unit cooler to raise COP. In addition, existing CNG 5 ton refrigerated trucks were converted into LNG vehicles to increase the efficiency of the cooling system and ensure safety against CNG. As a result, environmentally friendly refrigerated trucks using natural refrigerants of 1 ton and 5 ton sizes were developed.

키워드

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Fig. 1. Comparison of CO2 and Freon Refrige-rant (R-134a) Cycles.

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Fig. 2. Schematic diagram for Heat Exchanger andUnit Cooler using CO2.

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Fig. 3. System for 1 ton Refrigerated Top Car with Natural Refrigerant.

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Fig. 4. LNG Cold & Heat Utilization.

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Fig. 5. Schematic diagram of a frozen top car using LNG cold heat.

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Fig. 6. Heat Exchanger Drawings for CO2 NaturalRefrigerant.

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Fig. 7. Unit Cooler Drawings Using CO2 Natu-ral Refrigerant.

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Fig. 8. Experiment of Heat Exchanger Using CO2 Natural Refrigerant.

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Fig. 9. Unit Cooler Experiment with CO2 Natu-ral Refrigerant.

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Fig. 10. CO2 natural refrigerant cooling towervehicle and prototype.

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Fig. 11. High pressure piping for 120 bar.

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Fig. 12. Renovation of LNG vehicle of existing diesel 5ton refrigerated truck.

Table 1. CO2 Gas Cooler Heat Exchanger Cal-culation

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Table 2. CO2 Unit cooler Calculation

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Table 3. CO2 Gas Cooler Heat Exchanger Measurement Results

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Table 4. Unit Cooler Measurement Results

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Table 5. Cooling Load Calculation

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Table 6. Cooling system COP measurement result

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Table 7. COP measurement results when applying LNG

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참고문헌

  1. 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
  2. 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
  3. 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
  4. 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)
  5. 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)