Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/14792
Title: Further study on the inherent operating characteristics of a variable speed direct expansion air conditioning system
Authors: Li, Z
Xu, X
Deng, S 
Pan, D
Keywords: Direct expansion air-conditioning
Inherent correlation
Sensible heat ratio
Total cooling capacity
Variable speed
Issue Date: 2014
Publisher: Pergamon Press
Source: Applied thermal engineering, 2014, v. 66, no. 41671, p. 206-215 How to cite?
Journal: Applied thermal engineering 
Abstract: Further to a previous experimental study on the inherent operational characteristics of an experimental variable speed (VS) direct expansion (DX) air conditioning (A/C) system at only two inlet air states, an experimental study using the same experimental VS DX A/C system at six different inlet air states to the DX A/C system has been carried out and the study results are presented in this paper. The results suggested that different inlet air states to a DX A/C system influenced the operational characteristic of the system, in terms of the Inherent Correlation (IC) between its output total cooling capacity (TCC) and Equipment sensible heat ratio (SHR). Therefore, a further data processing method was developed using regression, by which the ICs of the VS DX A/C system at non-test inlet air states can be predicted with adequate accuracy. This has therefore paved way to developing advanced control strategies for indoor thermal environment (i.e., air temperature and humidity) based on the known or predicted ICs within the possible operating ranges of inlet air temperature and humidity to the DX A/C system, for better control accuracy and energy efficiency.
URI: http://hdl.handle.net/10397/14792
ISSN: 1359-4311
EISSN: 1873-5606
DOI: 10.1016/j.applthermaleng.2014.02.019
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