Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/17343
Title: Inherent correlation between the total output cooling capacity and equipment sensible heat ratio of a direct expansion air conditioning system under variable-speed operation (XXG SMD SHR DX AC unit)
Authors: Xu, X
Xia, L
Chan, M 
Deng, S 
Keywords: Air conditioning
Control
Direct expansion
Humidity
Sensible heat
Variable speed
Issue Date: 2010
Publisher: Pergamon Press
Source: Applied thermal engineering, 2010, v. 30, no. 13, p. 1601-1607 How to cite?
Journal: Applied thermal engineering 
Abstract: Appropriately controlling indoor air humidity at a suitable level in buildings is important. To simultaneously control both indoor air dry-bulb temperature and relative humidity requires the match between the total output cooling capacity of an A/C system and the total cooling load in a space served by the A/C system, as well as the Equipment sensible heat ratio (SHR) of the A/C system and the Application SHR of the conditioned space. This paper reports on an experimental study on the inherent correlations between the total output cooling capacity and Equipment SHR of a DX A/C system. Experiments were carried out under different combinations of compressor speed and supply fan speed, and also under different inlet air conditions to the DX evaporator. The results obtained would lead to a better understanding of the operating characteristics of a DX A/C system under variable-speed operation, as well as the constraint of using these characteristics in developing appropriate control strategies, so as to better design, operate and control DX A/C systems for improved indoor thermal environmental control.
URI: http://hdl.handle.net/10397/17343
ISSN: 1359-4311
EISSN: 1873-5606
DOI: 10.1016/j.applthermaleng.2010.03.016
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