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ENGINEERING JOURNAL CHIANG MAI UNIVERSITY


Volume 27, No. 01, Month APRIL, Year 2020, Pages 12 - 21


Cfd analysis on charged pressure effect of beta-stirling engine with constant temperature heat source

Nattakit Tongdee and Chalothorn Thumthae


Abstract Download PDF

This project presented an investigation of effect of charged pressure for power generation from Beta-Stirling engine. The engine was calculated power output and analyzed by computational fluid dynamics software (ANSYS Fluent 16.2). The control volume was considered as 2D axisymmetric for numerical method and the 𝑘𝑘 − 𝜀𝜀 turbulence model was used. The engine was calculated at constant hot end temperature, 773 K and constant cold end temperature, 300 K. The charged pressure in each case was 1, 2, 3 and 4 bar. The results showed that power output, heat transfer rate and flow velocity were varied depending on the charged pressure. Increasing charged pressure of a working fluid resulted in increasing of power output due to increasing of pressure distribution. Meanwhile, heat transfer rate increased due to higher fluid velocity. On the other hand, temperature variation in hot volume decreased when charged pressure was increased.


Keywords

Stirling engine, Computational fluid dynamics, Charged pressure, Compressible flow



ENGINEERING JOURNAL CHIANG MAI UNIVERSITY


Published by : Faculty of Engineering Chiang Mai University
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