標題: A Co-axial multi-tube heat exchanger applicable for a Geothermal ORC power plant
作者: Hsieh, J. C.
Lee, Y. R.
Guo, T. R.
Liu, L. W.
Cheng, P. Y.
Wang, C. C.
機械工程學系
交大工研院聯合研發中心
Department of Mechanical Engineering
NCTU/ITRI Joint Research Center
關鍵字: Geothermal;Co-axial heat exchanger;Organic Rankine Cycle;Heat transfer;Renewable energy
公開日期: 1-Jan-2014
摘要: The study proposes a Co-axial multi-tube heat exchanger (CMTHE) applicable to geothermal heat extraction. The heat exchanger is integrated with a 50 kW geothermal ORC power plant having a working fluid of R-245fa. Two field tests were performed to examine the system response of the ORC system subject to change of CMTHE. In case 1 where the flow rate in the shell-side of CMTHE is maintained, the pressure variation in the shell-side of CMTHE casts minor variations on heat extraction, ORC power generation, and ORC efficiency during the transient. Moreover, the effect of pressure has barely any influence of the final states of heat extraction, ORC power generation, and ORC efficiency. In case 2 where the pressure is preserved in the CMTHE, it is found that a decrease of flow rate in the CMTHE results in degradation of heat extraction, ORC power generation and ORC system efficiency. On the contrary, increasing the flow rate in the CMTHE leads to a rise of heat extraction, ORC power generation and ORC system efficiency. Unlike that in case 1, the effect of flow rate has a detectable effect on the final states of heat extraction, ORC power generation, and ORC efficiency. (C) 2014 Published by Elsevier Ltd.
URI: http://dx.doi.org/10.1016/j.egypro.2014.11.985
http://hdl.handle.net/11536/135689
ISSN: 1876-6102
DOI: 10.1016/j.egypro.2014.11.985
期刊: INTERNATIONAL CONFERENCE ON APPLIED ENERGY, ICAE2014
Volume: 61
起始頁: 874
結束頁: 877
Appears in Collections:Conferences Paper


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