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Session: Poster Session and Sponsors Exhibition
Session starts: Thursday 22 September, 14:00

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Gang Pei (universitnce of science and technology of China)
YunZhu Li (universitnce of science and technology of China)
Jing Li (universitnce of science and technology of China)
Jie Ji (universitnce of science and technology of China)

Abstract:
An ORC platform has been built to investigate its performance. In this platform, heated oil and circulating cooling water are used as heat source and sink respectively, organic fluid R123 is selected as the working medium, and a fabricated micro turbo-expander of high speed is employed as the heat engine. A DC motor-generator is attached to the turbo-expander via a gearbox, electricity is produced and then consumed by a series DC bulbs. Preliminary experiments were executed to examine the performance of the platform as well as the turbo-expander. In these tests, heat source temperature was regulated by a heat oil controller, and the turbo-expander inlet pressure was adjusted and controlled by the pump. The output power of the generator was regulated by adjusting the number of the bulbs manually. The experimental results show that the system works well. While the heat source and sink temperature were fixed at 108 ℃ and 31 ℃ respectively, the peak rotational speed of the turbo-expander reached to 24000 r/min, and the corresponding isentropic efficiency was 0.65.