Experimental study of a R-407C drop-in test on an off-the-shelf air conditioner with a counter-cross-flow evaporator

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An off-the-shelf 2-ton window air conditioner having an energy efficiency ratio of 10 was used to perform a drop-in test with R-407C. Laboratory tests were performed using a parallel-cross-flow (PCF) evaporator and a counter-cross-flow (CCF) evaporator. The CCF configuration is designed to take advantage of the temperature glide of R-407C so that the warm evaporator inlet air will be in contact with the higher temperature part of the evaporator coils first. The test results indicated that, at the Air Conditioning and Refrigeration Institute-rated indoor and outdoor conditions, the cooling capacity was 8% higher and system coefficient of performance about 3.8% ... continued below

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20 p.

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Mei, V.C.; Domitrovic, R. & Chen, F.C. March 1, 1998.

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Description

An off-the-shelf 2-ton window air conditioner having an energy efficiency ratio of 10 was used to perform a drop-in test with R-407C. Laboratory tests were performed using a parallel-cross-flow (PCF) evaporator and a counter-cross-flow (CCF) evaporator. The CCF configuration is designed to take advantage of the temperature glide of R-407C so that the warm evaporator inlet air will be in contact with the higher temperature part of the evaporator coils first. The test results indicated that, at the Air Conditioning and Refrigeration Institute-rated indoor and outdoor conditions, the cooling capacity was 8% higher and system coefficient of performance about 3.8% higher for the CCF evaporator than for the PCF evaporator. The test results also showed that the latent load for CCF was 30.6% higher than for PCF. The far better dehumidification effect provided by the CCF evaporator design is desirable for areas where the latent load is high. The experimental findings should be useful for future efforts to design a dehumidifier that uses a zeotropic refrigerant that provides a significant temperature glide. R-22 test data from a previous project are included as a reference.

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20 p.

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OSTI as DE98005048

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  • 1998 ASHRAE summer annual meeting, Toronto (Canada), 20 Jun 1998

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  • Other: DE98005048
  • Report No.: ORNL/CP--97642
  • Report No.: CONF-980650--
  • Grant Number: AC05-96OR22464
  • Office of Scientific & Technical Information Report Number: 654074
  • Archival Resource Key: ark:/67531/metadc702999

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • March 1, 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • Jan. 25, 2016, 12:13 p.m.

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Mei, V.C.; Domitrovic, R. & Chen, F.C. Experimental study of a R-407C drop-in test on an off-the-shelf air conditioner with a counter-cross-flow evaporator, article, March 1, 1998; Tennessee. (digital.library.unt.edu/ark:/67531/metadc702999/: accessed October 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.