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논문 상세정보

병렬 연결된 다중 증발기 구조 2상 유동 순환형 열사이폰의 부분부하 및 저온운전 특성에 관한 실험적 연구

Experimental Study on the Two Phase Thermosyphone Loop with Parallel Connected Multiple Evaporators under Partial Load and Low Temperature Operating Condition


Two phase thermosyphone loop for electronics cooling are designed and manufactured to test its performance under the partial load and low environment temperature conditions. The thermosyphone device has six evaporators connected parallel for the purpose of cooling six power amplifier units (PAU) independently. The heater modules for simulating PAUs are adhered with thermal pad to the evaporator plates to reduce the contact resistance. There are unbalanced distributions of liquid refrigerant in the differently heated evaporators due to the vapor pressure difference. To reduce the vapor pressure differences caused by partial heating, two evaporators are connected each other using the copper tube. The pressure regulation tube successfully reduces these unbalances and it is good candidates for a field distributed systems. Under the low environment temperature operating condition, such as $-30^{\circ}C$, there may be unexpected subcooling in condenser. It leads the very low saturation pressure, and under this condition there exists explosive boiling in evaporator. The abrupt pressure rise due to the explosive boiling inhibits the supplement of liquid refrigerant to the evaporator for continuous cooling. Finally the cooling cycle will be broken. For the normal circulation of refrigerant there may be an optimum cooling air flow rate in condenser to adjust the given heat load.

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참고문헌 (7)

  1. Ramaswamy, C., Joshi, Y., Nakayama, W.and Johnson, W. I., 1998, Performance of a compact two-phase thermosyphone: effect of evaporator inclination, Liquid Fill Volume and Contact Resistance, Proceedings of 11th IHTC, Vol. 2, pp.127-132 
  2. Lee, K. W., Rhi, S. H., Chang, K. C. and Lee,Y., 2000, An experimental and simulation study on medium and large scale twophase loop thennosyphones, 6th Int. Heat Pipe Conference, pp. 251-257 
  3. Lee, J. S., Rhi, S. H., Kim, C. N. and Lee, Y.,2003, Use of two-phase loop thermosyphones or thermoelectric refrigeration: experiment and analysis, Applied Thermal Engineering,Vol. 23, pp.1167-1176 
  4. Kang, I.S., Choi, D. K. and Kim, T. Y, 2004,The experimental study on the performance of two-phase loop thermosyphone system for electronics equipments cooling, Transaction of the KSME (B), Vol. 28, No.4, pp.415-424 
  5. Khodabandeh, R. and Palm, B., 2000, An experimental and numerical investigation of pressure drop in a closed loop two phase thermosyphone system, Inter Society Conference on Thermal Phenomena, IEEE, pp.333-339 
  6. Khrustalev, D., 2002, Loop Thermosyphones for Cooling of Electronics, Technical Report of Thennacore Inc 
  7. Lee, K. W., Chang, K. C., Lee, K.J., Lee, Y.S. and Hong, S. H., 1995, Heat transportation technology of separate heat pipe heat exchanger, Energy R&D Technical Analysis Report, Vol. 17, No. 1&2, pp.154-166.1 

이 논문을 인용한 문헌 (1)

  1. Choi, Yong-Don ; Kang, Yong-Tae ; Kim, Nae-Hyun ; Kim, Man-Hoe ; Park, Kyoung-Kuhn ; Park, Byung-Yoon ; Park, Jin-Chul ; Hong, Hi-Ki 2007. "Recent Progress in Air Conditioning and Refrigeration Research - A Review of Papers Published in the Korean Journal of Air-Conditioning and Refrigeration Engineering in 2004 and 2005 -" 설비공학논문집 = Korean journal of air-conditioning and refrigeration engineering, 19(1): 94~131 


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