Open AccessA liquid over-feeding military air conditioner
Author(s) -
V. C. Mei,
F.C. Chen
Publication year - 1995
Language(s) - English
Resource type - Reports
DOI - 10.2172/105071
Subject(s) - refrigerant , cooling capacity , air conditioning , coefficient of performance , baseline (sea) , power consumption , environmental science , power (physics) , automotive engineering , nuclear engineering , simulation , thermodynamics , computer science , engineering , physics , heat exchanger , oceanography , geology
A 3.3-ton military air conditioning unit has been studied experimentally in both baseline (as received) and as modified for liquid over-feeding (LOF) operation. Tne baseline test, using a proper refrigerant charge, showed the measured cooling capacity to be less than 1% off the rated capacity at 95{degrees}F ambient temperature. The test results indicate that LOF operation outperforms the baseline case over a wide ambient temperature range in terms of cooling capacity, power consumption, and system coefficient of performance (COP). At a 95{degrees}F test point, LOF operation has a cooling capacity of 51,100 BTU per hour, which is a 28.9% improvement over the baseline operation capacity of 39,600 BTU per hour. The COP for LOF at 95{degrees}F is 2.62, which is 29% better than the baseline COP of 2.03. However, an optimal refrigerant charge is essential for LOF to work properly