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Open AccessArticle

Calculation of Efficiencies of a Ship Power Plant Operating with Waste Heat Recovery through Combined Heat and Power Production

by Mirko Grljušić 1,2,*, Vladimir Medica 3,† and Gojmir Radica 1,†
1
Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split, Rudjera Boškovića 32, 21000 Split, Croatia
2
GM TURBO d.o.o., Vukovarska 58, 21000 Split, Croatia
3
Faculty of Engineering, University of Rijeka, Vukovarska 58, 51000 Rijeka, Croatia
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Roberto Capata
Energies 2015, 8(5), 4273-4299; https://doi.org/10.3390/en8054273
Received: 25 February 2015 / Revised: 10 April 2015 / Accepted: 16 April 2015 / Published: 12 May 2015
(This article belongs to the Special Issue Organic Rankine Cycle (ORC))
The aim of this research was to investigate the possibility of a combined heat & power (CHP) plant, using the waste heat from a Suezmax-size oil tanker’s main engine, to meet all heating and electricity requirements during navigation. After considering various configurations, a standard propulsion engine operating at maximum efficiency, combined with a supercritical Organic Rankine cycle (ORC) system, was selected to supply the auxiliary power, using R245fa or R123 as the working fluid. The system analysis showed that such a plant can meet all heat and electrical power requirements at full load, with the need to burn only a small amount of supplementary fuel in a heat recovery steam generator (HRSG) when the main engine operates at part load. Therefore, it is possible to increase the overall thermal efficiency of the ship’s power plant by more than 5% when the main engine operates at 65% or more of its specified maximum continuous rating (SMCR). View Full-Text
Keywords: ship power plant; waste heat recovery; combined heat and power production; Organic Rankine Cycle (ORC); ship power plant efficiency; waste heat efficiency ship power plant; waste heat recovery; combined heat and power production; Organic Rankine Cycle (ORC); ship power plant efficiency; waste heat efficiency
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Grljušić, M.; Medica, V.; Radica, G. Calculation of Efficiencies of a Ship Power Plant Operating with Waste Heat Recovery through Combined Heat and Power Production. Energies 2015, 8, 4273-4299.

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