2013•Journal of Anhui University of Science and TechnologyRequires access
Numerical Investigation of Heat Recovery Exchanger Performance from Exhaust Air
Pang Jian-yon
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Abstract
Three- dimensional physical models of 150mm150mm heat? recovery? exchanger? from? exhaust?air were established to investigate effects of tunnel structure and flow velocity on heat exchanger performance.Characteristics of flow and heat transfer in five types of tunnel structure of heat exchangers were studied by using softeare FLUENT. In addition,the velocity field and temperature distribution are obtained by numerical simulation. Effects of heat exchanger tunnel structure and inlet velocity on the heat exchange efficiency and pressure drop were analyzed. The results showed that heat exchange efficiency is the highest and pressure drop the lowest in case of heat exchanger without intermediate support plates. Efficiency of exchanger with rectangle tunnel structure slightly improves with increase of length- width ratio,and its performance is just inferior to that without intermediate support plates. Efficiency of exchangers with triangle tunnel is the lowest and its pressure drop is the highest.