Performance Investigation of Regenerative Total Heat Exchanger with Periodic Flow
Date Issued
2010
Date
2010
Author(s)
Chen, Shen-Jie
Abstract
The object of this research is to improve the performance of the rotary-type total heat exchanger. This research apply the periodic flow to the fixed wheel instead of rotate it. The relationship between period and effectiveness is obtained from (1) Experiment (2) Mathematical solution.
In the experiment, according to the theory of the classic single-zone system, heating coils and cooling coils is used to simulate the state of the outdoor-air and indoor-air. Heat and moisture storage materials are aluminum and silica gel. The operation period is 2 minutes, 3 minutes, 4 minutes, 6 minutes and 8 minutes. The result of the experiment shows that the sensible heat effectiveness, latent heat effectiveness and total heat effectiveness reach maximum while the operation period is 3 minutes, which are 80%, 52% and 68% respectively.
In theoretical part, in order to simplify the math model, lumped system assumption is applying to the whole system, and solve it in 1-D. The dominate dimensionless parameter is K2*=2τKy/ρa, and effectiveness decreases when increases.
Subjects
Total heat exchanger
Regenerator
Periodic flow
Effectiveness
Lumped system
Type
thesis
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