In this paper, an analysis of different micro-CHP systems is made from the point of view of benefits and limitations of several prime movers used in micro-CHP systems: reciprocating engines, Stirling engines, micro steam and gas turbines and fuel cell systems. A comparison using the metrics and weighting factors is suggesting that the reciprocating engines and the Stirling engines are more appropriate for the micro-CHP. In another analysis, micro-CHP factors related to efficiency and thermal/electric power for different prime movers are compared. Micro-CHP systems with Stirling engine has the best score. The electric efficiency is better for micro-CHP systems with reciprocating engines, and Stirling engines are in the second place. The thermal efficiency is better for micro-CHP systems with Stirling engines followed by reciprocating engines. Stirling engines use an external heat source, which simplifies design, minimizes noise and vibration, and allow multi-fuel use. These features make the Stirling engine a promising alternative to the internal combustion engine.
Stirling Engine: An Emerging Prime Mover for Micro-CHP Systems
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Scarpete, D, & Badea, N. "Stirling Engine: An Emerging Prime Mover for Micro-CHP Systems." Proceedings of the ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis, Volume 1. Istanbul, Turkey. July 12–14, 2010. pp. 299-305. ASME. https://doi.org/10.1115/ESDA2010-25212
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