설비공학논문집 (Korean Journal of Air-Conditioning and Refrigeration Engineering)

  • 제13권10호
  • /
  • Pages.993-1001
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  • 2001
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  • 1229-6422(pISSN)
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  • 2465-7611(eISSN)
대한설비공학회 (The Society of Air-Conditioning and Refrigerating Engineers of Korea)
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  • 발행 : 2001.10.01
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초록

Experimental investigation on the performance of dual-evaporator refrigeration system with an ejector has been carried out. In this study, a hydrofluorocarbon (HFC) refrigerant R134a is chosen as a working fluid. The condenser and two-evaporators are made as concentric double pipes with counter-flow type heat exchangers. Experiments were performed by changing the inlet and outlet temperatures of secondary fluids entering condenser, high-pressure evaporator and low-pressure evaporator at test conditions keeping a constant compressor speed. When the external conditions (inlet temperatures of secondary fluid entering condenser and one evaporator) are fixed, results show that coefficient of performance (COP) increases as the inlet temperature of the other evaporator rises. It is also shown that the COP decreases as the mass flaw rate ratio of suction fluid to motive fluid increases. The COP of dual-evaporator refrigeration system with an ejector is superior to that of a single-evaporator vapor compression system by 3 to 6%.

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참고문헌

  1. Int. J. Refrig v.17 no.6 An experimental study of the performance of a dual-loop refrigerator/freezer system Won, S.;Jung, D. S.;Radermacher, R.
  2. Int. Congress of Refrigeration v.B Design and construction of efficient US-type combined refrigerator/freezer Pederson, P. H.;Galster, G.;Gulbrandsen, T.;Norgard, J. S.
  3. ASHRAE Trans. v.97 Simulation of nonazeotropic refrigerant mixtures for use in a dual-circuit refrigerator/freezer with countercurrent heat exchangers Bare, J. C.;Gage, C. L.;Radermacher, R.;Jung, D.
  4. ASHRAE Trans. v.101 Analysis of a domestic refrigerator cycle with and ejector Tomasek, M. L.;Radermacher, R.
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  8. On application of non-azeotropic two-component refrigerant in domestic refrigerator and home freezer Lorenz, A.;Meutzner, K.
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