Organic Rankine Cycles (ORC) is predominantly used in waste heat recovery applications because of their low temperature working range. The main efficiency enhancement operation in an Organic Rankine Cycle is reducing the pump work. The pump converts electrical energy to flow energy. This input reduced and output maintained at the same level gives us a more efficient waste heat recovery system. The pump work can also be achieved by using a material that has the ability to expand on heating and revert back to its original state on cooling. The expansion property of the material is used to compress and drive the operating fluid through the cycle. Material that was observed to possess such properties was Phase Change Material. Conventionally PCM were used as thermal storage to preheat the working fluid in an ORC but a novel idea is to make the PCM utilize the heat rejected from the condenser and do the pump work. This paper discusses the various desirable properties of PCM to perform pump work efficiently and also the general layout and working of ORC system using PCM. The working fluid selected is toluene. © (2014) Trans Tech Publications, Switzerland.
cited By (since 1996)0; Conference of org.apache.xalan.xsltc.dom.DOMAdapter@3a2b1ad6 ; Conference Date: org.apache.xalan.xsltc.dom.DOMAdapter@63eef56f Through org.apache.xalan.xsltc.dom.DOMAdapter@5d337daa; Conference Code:106361
B. S. Hariharan and Suresh, K., “Phase change material as pump in an Organic Rankine Cycle”, Applied Mechanics and Materials, vol. 575, pp. 662-667, 2014.