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http://dx.doi.org/10.5916/jkosme.2009.33.8.1129

Characteristics of Temperature Control by Hot-gas Bypass Flow Rate on Industrial Water Cooler  

Baek, Seung-Moon (부경대학교 대학원 냉동공조공학과)
Choi, Jun-Hyuk (부경대학교 대학원)
Byun, Jong-Yeong (부경대학교 대학원)
Moon, Choon-Geun ((주) 대일)
Lee, Ho-Saeng (부경대학교)
Jeong, Seok-Kwon (부경대학교)
Yoon, Jung-In (부경대학교 기계공학부)
Publication Information
Journal of Advanced Marine Engineering and Technology / v.33, no.8, 2009 , pp. 1129-1136 More about this Journal
Abstract
The paper presents the performance characteristics for a cooling system using EEV. The water cooler was used to reduce thermal deformation and contraction due to high speed of machine tools and the EEV was used for capacity control for water cooler. The apparatus was designed for hot-gas bypass system which a hot-gas can flows from outlet of compressor to the inlet of evaporator. This experiment is the intermediary study for precise temperature control through PID control. The results show that the evaporator pressure increased and refrigeration capacity decreased as the EEV opening step of hot-gas bypass increased. These results can be used as basic data for the design of effective water cooler.
Keywords
Hot-gas bypass; Oil cooler; Electronic expansion valve; On-Off control; PID control;
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  • Reference
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