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J. Ocean Eng. Technol. 2007;21(3):1-7.    

Evaluation of Heat Balance for Cooling System of an Armored Installation in Small Space
Kim, Sung-Kwang;Ahn, Seok-Hwan;Nam, Ki-Woo;
Defence Agency for Technology and Quality;School of Mechanical Engineering, Pukyong National University;Division of Materials Science and Engineering, Pukyong National University;
좁은 공간 내의 밀폐형 장치 냉각시스템에 대한 열평형 평가
김성광;안석환;남기우;
국방기술품질원;부경대학교 기계공학부;부경대학교 신소재공학부;
© 2007 The Korean Society of Ocean Engineers     Open access / Under a Creative Commons License
Keywords: Heat exchanger, Heat balance, Efficiency-NTU(number of transfer unit), Armored vehicle
핵심용어: 열교환기, 열평형, 효율-NTU법, 밀폐형 차량
Abstract
In this study, the heat balance test of an engine was conducted, and the heat released to coolant is measured and corrected using a power adjustment factor for high fuel temperature to simulate heat rejection of the engine. An engine-converter matching simulation program which can compute the engine speed, transmission output speed, transmission input and output power is developed from the vehicle, transmission and engine performance curve. With this information and the engine heat rejection characteristics, the engine and transmission heat rejection rates can be determined at given condition. In analyzing the air mass flow, a sub program computing the air mass flow rate from the equation of the pressure balance between cooling fan static pressure rise and pressure losses of cooling components is developed.
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