Experimental Characterization of Transitory Functioning Regimes of a Biomass Stirling Micro-CHP

Ștefan-Dominic Voronca, Monica Siroux and George Darie
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Ștefan-Dominic Voronca: INSA Strasbourg ICUBE, University of Strasbourg, 67000 Strasbourg, France
Monica Siroux: INSA Strasbourg ICUBE, University of Strasbourg, 67000 Strasbourg, France
George Darie: Department of Power Generation and Usage, University Politehnica of Bucharest, 060042 Bucharest, Romania

Energies, 2022, vol. 15, issue 15, 1-23

Abstract: Micro-cogeneration (micro-combined heat and power) is a technology that simultaneously produces decentralized thermal and electrical energy with a power of less than 50 kW el . This technology consists of using the waste heat generated by a thermodynamic process to meet the heating and hot water demands of buildings. The use of biomass as a fuel offers important advantages: use of a renewable energy, carbon neutrality, availability, and low cost. Furthermore, the analysis and optimization of hybrid energy systems, which include existing micro-cogeneration systems powered by renewable energy, is a scientific challenge needing experimental characterization of such micro-cogeneration systems. In this context, a biomass Stirling micro-CHP unit (μCHP), was tested to characterize its energy performance. A dynamic model based on these experimental investigations was developed to evaluate its thermal power output and energy efficiencies. The dependence of the nominal load on the water flow rate of the consumer and the inlet temperature of the fluid heated by the cogeneration system was studied. Results showed that the flow rate of the heat transfer fluid rejecting heat from the μCHP unit influences the temperature of the heat transfer fluid exiting the μCHP to supply domestic hot water to the user, which, if too high, will prompt the self-guarding mechanism of the machine.

Keywords: micro-cogeneration; biomass; Stirling engine; building; energy production (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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