Verification Test of a Small Output Organic Rankine Cycle Based on Performance Evaluation of a Scroll Turbine

Abstract

The final target of this feasibility study is to implimante in society of a small output organic Rankine cycle（ORC）less than 10 kW. In this study, the evaluation method of a turbine performance which is the major component in the ORC was examined, moreover, the performance of the ORC was evaluated by the heat source of Obama hot spring in Unzen city. In the verification test of Obama hot spring, the thermal efficiency of the prototype ORC was 2.4％. The turbine efficiency at a design point in the turbine test was 21.2％, whereas the turbine efficiency in the ORC verification test was 19.2％. These results indicated that the turbine efficiency could express the universal turbine performance.