{"title":"Efficiency of Compact Organic Rankine Cycle System with Rotary-Vane-Type Expander for Low-Temperature Waste Heat Recovery","authors":"Musthafah b. Mohd.Tahir, Noboru Yamada, Tetsuya Hoshino","country":null,"institution":"","volume":37,"journal":"International Journal of Mechanical and Mechatronics Engineering","pagesStart":105,"pagesEnd":111,"ISSN":"1307-6892","URL":"https:\/\/publications.waset.org\/pdf\/6420","abstract":"This paper describes the experimental efficiency of a\r\ncompact organic Rankine cycle (ORC) system with a compact\r\nrotary-vane-type expander. The compact ORC system can be used for\r\npower generation from low-temperature heat sources such as waste\r\nheat from various small-scale heat engines, fuel cells, electric devices,\r\nand solar thermal energy. The purpose of this study is to develop an\r\nORC system with a low power output of less than 1 kW with a hot\r\ntemperature source ranging from 60\u00b0C to 100\u00b0C and a cold\r\ntemperature source ranging from 10\u00b0C to 30\u00b0C. The power output of\r\nthe system is rather less due to limited heat efficiency. Therefore, the\r\nsystem should have an economically optimal efficiency. In order to\r\nrealize such a system, an efficient and low-cost expander is\r\nindispensable. An experimental ORC system was developed using the\r\nrotary-vane-type expander which is one of possible candidates of the\r\nexpander. The experimental results revealed the expander\r\nperformance for various rotation speeds, expander efficiencies, and\r\nthermal efficiencies. Approximately 30 W of expander power output\r\nwith 48% expander efficiency and 4% thermal efficiency with a\r\ntemperature difference between the hot and cold sources of 80\u00b0C was\r\nachieved.","references":null,"publisher":"World Academy of Science, Engineering and Technology","index":"Open Science Index 37, 2010"}