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http://dx.doi.org/10.5855/ENERGY.2014.23.4.230

Experimental Study of Vane Expander Prototype Applied to Micro Organic Rankine Cycle  

Shin, Dong Gil (Department of Engine Research, Korea Institute of Machinery & Materials)
Kim, Young Min (Department of Engine Research, Korea Institute of Machinery & Materials)
Publication Information
Journal of Energy Engineering / v.23, no.4, 2014 , pp. 230-235 More about this Journal
Abstract
In this study, performances of the vane expander protype for micro organic Rankine cycle with refrigerant R134a as a working fluid have been analyzed. While operating organic Rankine cycle for analysing expander efficiencies such as overall efficiencies, volumetric efficiencies and mechanical efficiencies under $110^{\circ}C$ of expander inlet temperature, the power of the expander, inlet temperature of expander, inlet pressure of expander and the flow rate of the working fluid(refrigerant R134a) have been measured while varying the rotational speed of the expander. It was found that the more the expander revolution speed is high, the more the expander power, overall efficiencies and volumetric efficiencies are higher. In case of 500 rpm of rotational speed, overall efficiencies are 6~7% and in case of 1000 rpm, overall efficiencies are 11~12%. We have found that low volumetric efficiencies result in poor overall efficiencies.
Keywords
Micro organic Rankine cycle; Vane expander; Power; efficiency;
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