TY - JOUR
T1 - A CFD parametric study on the performance of a low-temperature-differential γ-type Stirling engine
AU - Chen, Wen Lih
AU - Yang, Yu Ching
AU - Salazar, Jose Leon
N1 - Funding Information:
This work was supported by the Ministry of Science and Technology, Taiwan, Republic of China , under the grant number MOST 103-2622-E-168-006-CC3 . The authors are very grateful for the financial support.
Publisher Copyright:
© 2015 Published by Elsevier Ltd.
PY - 2015/12/1
Y1 - 2015/12/1
N2 - An in-house CFD code has been applied to a low-temperature-differential (LTD) γ-type Stirling engine to understand the effects posed by several geometrical and operational parameters on engine performance. The results include variations of pressure, temperature, and heat transfer rates within an engine cycle as well as variations of engine's power and efficiency versus these parameters. It is found that power piston stroke and radius influence engine performance very similarly, and power and efficiency both increase as these two parameters increase. In fact, the effects of the two parameters can be assimilated into those by the parameter of compression ratio. The stroke of displacer is observed to affect strongly on heat input but weakly on power, thus causing the efficiency to decrease as it increases. As expected, both power and efficiency increase as temperature difference between the hot and cold ends increases. Lastly, engine speed is observed to pose strong positive effects on power but exert weak effects on efficiency. This study reveals the effects produced by several important parameters on engine performance, and such information is very useful for the design of new LTD Stirling engines.
AB - An in-house CFD code has been applied to a low-temperature-differential (LTD) γ-type Stirling engine to understand the effects posed by several geometrical and operational parameters on engine performance. The results include variations of pressure, temperature, and heat transfer rates within an engine cycle as well as variations of engine's power and efficiency versus these parameters. It is found that power piston stroke and radius influence engine performance very similarly, and power and efficiency both increase as these two parameters increase. In fact, the effects of the two parameters can be assimilated into those by the parameter of compression ratio. The stroke of displacer is observed to affect strongly on heat input but weakly on power, thus causing the efficiency to decrease as it increases. As expected, both power and efficiency increase as temperature difference between the hot and cold ends increases. Lastly, engine speed is observed to pose strong positive effects on power but exert weak effects on efficiency. This study reveals the effects produced by several important parameters on engine performance, and such information is very useful for the design of new LTD Stirling engines.
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U2 - 10.1016/j.enconman.2015.10.007
DO - 10.1016/j.enconman.2015.10.007
M3 - Article
AN - SCOPUS:84944328115
VL - 106
SP - 635
EP - 643
JO - Energy Conversion and Management
JF - Energy Conversion and Management
SN - 0196-8904
ER -
