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Open AccessArticle

Preliminary Design of Compact Condenser in an Organic Rankine Cycle System for the Low Grade Waste Heat Recovery

by Roberto Capata *,† and Erasmo Zangrillo
Department of Mechanical and Aerospace Engineering, University of Roma "Sapienza", Piazzale Aldo Moro, 5, 00185 Roma, Italy
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Energies 2014, 7(12), 8008-8035;
Received: 19 September 2014 / Revised: 10 October 2014 / Accepted: 13 November 2014 / Published: 28 November 2014
(This article belongs to the Special Issue Organic Rankine Cycle (ORC))
The aim of this paper is to present a thermodynamic cycle for the production of electrical power in the 2–5 kW range, suitable for all types of thermally propelled vehicles. The sensible heat recovered from the exhaust gases feeds the energy recovery system, which is able to produce sufficient power to sustain the air conditioning system or other auxiliaries. The working fluids R134a and R245fa have been used in the ORC system, and the systems are simulated by CAMEL-ProTM software. The cycles are generated starting from the same heat source: the exhaust gas of a typical 2.0 L Diesel engine (or from a small size turbine engine). The design of the condenser has been performed to obtain a very compact component, evaluating the heat exchanger tube and fins type design. Through empirical formulas, the area of heat exchange, the heat required to exchange and the pressure drop in the element have been calculated. A commercial software package is used to build the model of the condenser, then a thermal and mechanical analysis and a CFD analysis are realized to estimate the heat exchange. Finally the evaluations, the possible future studies and possible improvements of the system are shown. View Full-Text
Keywords: Organic Rankine Cycle (ORC); small size; condenser; preliminary design Organic Rankine Cycle (ORC); small size; condenser; preliminary design
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Capata, R.; Zangrillo, E. Preliminary Design of Compact Condenser in an Organic Rankine Cycle System for the Low Grade Waste Heat Recovery. Energies 2014, 7, 8008-8035.

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