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Energies 2016, 9(4), 239; doi:10.3390/en9040239

Development of an ICE-Based Micro-CHP System Based on a Stirling Engine; Methodology for a Comparative Study of its Performance and Sensitivity Analysis in Recreational Sailing Boats in Different European Climates

1
Defense University Center, Naval Academy, Marín 36920, Spain
2
ETS Ingenieros Industriales, University of Vigo, Vigo 36310, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Francesco Calise
Received: 30 December 2015 / Revised: 2 March 2016 / Accepted: 21 March 2016 / Published: 25 March 2016
(This article belongs to the Special Issue Simulation of Polygeneration Systems)
View Full-Text   |   Download PDF [4884 KB, uploaded 25 March 2016]   |  

Abstract

Micro combined heating and power (micro-CHP) systems are becoming more than important, and even essential, if we pretend to take full advantage of available energy. The efficiency of this kind of systems reaches 90% and important savings in energy transport processes can occur. In this research, an internal combustion engine (ICE)-based micro-CHP system was developed and tested under specific constraints. The system uses a two cylinder Otto engine as prime mover, coupled to an electrical alternator, and it uses exhaust gases and engine cooling circuit heat. The micro-CHP system was developed to match the electrical power of a typical Stirling engine (SE)-based micro-CHP unit, in order to later compare both systems’ performance under similar circumstances. Different operating modes were tested under different engine speeds, in order to find the optimum operating point. A stand-alone portable application of this system was performed using recreational sailing boats as mobile homes. Specific considerations had to be taken, related to boundary conditions with sea water, and a transient simulation was performed, considering the boat under three different European climates. Results were compared for the different locations and the performance of the equipment shown. A comparative study with the SE-based micro-CHP system performance was done, and a sensitivity analysis of the influence of the battery size was carried out under the same conditions. The SE and ICE-based proposed micro-CHP system have similar behavior, except for the differences found due to the electric/thermal power ratios in both systems. Battery bank size sensitivity analysis reflects a limit in performance improvement. This limit is caused by the uniform distribution of electrical demand profile. View Full-Text
Keywords: micro combined heating and power (micro-CHP); stirling engine; internal combustion engine; TRNSYS; sensitivity analysis; recreational sailing boat micro combined heating and power (micro-CHP); stirling engine; internal combustion engine; TRNSYS; sensitivity analysis; recreational sailing boat
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Rey, G.; Ulloa, C.; Míguez, J.L.; Arce, E. Development of an ICE-Based Micro-CHP System Based on a Stirling Engine; Methodology for a Comparative Study of its Performance and Sensitivity Analysis in Recreational Sailing Boats in Different European Climates. Energies 2016, 9, 239.

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