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| Analysis of influence of various factors on power of β-Stirling engine |
| YANG Xiaohong1, 2*,HAN Lei1,TIAN Rui1,3,WANG Liping1 |
| 1. College of Energy and Power Engineering, Inner Mongolia University of Technology, Hohhot, Inner Mongolia 010051, China; 2. Key Laboratory of Wind Energy and Solar Energy Utilization Technology, Ministry of Education, Inner Mongolia University of Technology, Hohhot, Inner Mongolia 010051, China; 3. Key Laboratory of Renewable Energy in Inner Mongolia, Inner Mongolia University of Technology, Hohhot, Inner Mongolia 010051, China |
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Abstract The influence of various factors on the power of β-Stirling engine was studied. Based on Schmidt analysis, the power of a β-Stirling engine was calculated theoretically. Four factors affecting the performance of Stirling engine, namely, piston phase angle, stroke volume ratio, dead vo-lume ratio and temperature ratio. Matlab programming was used to draw 3D surfaces of the results, and the effect of coupling of two factors on engine power was analyzed, eventually the interaction between factors was obtained. The results show that there is an optimum piston phase angle, which is decreased with increase of volume ratio, but rises with increase of temperature ratio. The larger the stroke volume ratio, the greater the power. The smaller the dead volume ratio, the greater the influence of stroke vo-lume ratio on the power. The optimal stroke volume ratio is ranged in 0.5-1.5. An increase in dead vo-lume ratio results in a decrease in power and the dead volume ratio should be less than 1.5. An increase in stroke volume ratio amplifies the extent of this decline. However, an increase in temperature ratio suppresses the extent of the decline. The power decreases with increase of temperature ratio and the optimum temperature ratio should be less than 0.5. Finally, the effect and significance of four factors are analyzed by employing orthogonal experimental design, and the temperature ratio and stroke volume ratio are relatively significant in the results.
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Received: 31 July 2018
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