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

Abstract

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.

Authors:
; ;
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (United States)
Sponsoring Org.:
USDOE Assistant Secretary for Energy Efficiency and Renewable Energy, Washington, DC (United States)
OSTI Identifier:
654074
Report Number(s):
ORNL/CP-97642; CONF-980650-
ON: DE98005048; TRN: AHC2DT05%%158
DOE Contract Number:  
AC05-96OR22464
Resource Type:
Conference
Resource Relation:
Conference: 1998 ASHRAE summer annual meeting, Toronto (Canada), 20 Jun 1998; Other Information: PBD: Mar 1998
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; AIR CONDITIONERS; PERFORMANCE TESTING; MATERIAL SUBSTITUTION; REFRIGERANTS; DEHUMIDIFIERS; DEHYDRATION; HEAT EXCHANGERS; CROSSFLOW SYSTEMS; COUNTERFLOW SYSTEMS; VAPOR COMPRESSION REFRIGERATION CYCLE

Citation Formats

Mei, V C, Domitrovic, R, and 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. United States: N. p., 1998. Web.
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. United States.
Mei, V C, Domitrovic, R, and Chen, F C. Sun . "Experimental study of a R-407C drop-in test on an off-the-shelf air conditioner with a counter-cross-flow evaporator". United States. https://www.osti.gov/servlets/purl/654074.
@article{osti_654074,
title = {Experimental study of a R-407C drop-in test on an off-the-shelf air conditioner with a counter-cross-flow evaporator},
author = {Mei, V C and Domitrovic, R and Chen, F C},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {3}
}

Conference:
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