INTEGRATION OF ORGANIC RANKINE CYCLE AND SCROLL EXPANDER MODELS FOR EFFECTIVE DESIGN AND PERFORMANCE USING ORGANIC WORKING FLUIDS

Narasimhan, Arun Kumar and Wickramaratne, Chatura and Kamal, Rajeev and Singh, Punit and Goswami, DY (2017) INTEGRATION OF ORGANIC RANKINE CYCLE AND SCROLL EXPANDER MODELS FOR EFFECTIVE DESIGN AND PERFORMANCE USING ORGANIC WORKING FLUIDS. In: 11th ASME International Conference on Energy Sustainability, JUN 26-30, 2017, Charlotte, NC.

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Abstract

This paper presents the organic Rankine cycle performance comparison of several working fluids with low global warming potential and low ozone depletion potential at several heat source temperatures. At an evaporating temperature of 80 degrees C, maximum first law efficiency of 5.8% was achieved with ammonia, while at 145 degrees C and 180 degrees C, diethyl ether provides the maximum cycle efficiencies of 11.4% and 13% respectively. For the best operating conditions of the ORC model, a suitable two-stage scroll geometry was modeled and its performance was evaluated. Stage I and stage II scroll geometries with volume ratios of 5.3 each were modeled for the supply conditions of 180 C and 2.6 MPa. The geometries provided a combined shaft work of 8.7 kW at combined expander efficiency of 89% accounting for the losses due to the leakage in the expander.

Item Type:	Conference Proceedings
Additional Information:	Copy right for this article belongs to the AMER SOC MECHANICAL ENGINEERS, THREE PARK AVENUE, NEW YORK, NY 10016-5990 USA
Department/Centre:	Division of Mechanical Sciences > Mechanical Engineering
Date Deposited:	07 Dec 2017 09:34
Last Modified:	06 Nov 2018 11:47
URI:	http://eprints.iisc.ac.in/id/eprint/58404

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