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Micro combined heat and power operating on renewable energy for residential building

Bernard Aoun 1
1 CEP/Paris
CEP - Centre Énergétique et Procédés
Abstract : The building sector consumes more than 43% of the total national energy consumption in France leading to more than 25% of CO2 emissions associated to this energy consumption. A large number of options exist to limit CO2 emissions and to improve the performance of buildings. One of these options is developed in this thesis, the use of renewable energies (solar and biomass) in combined production of heat and power. Conventional systems of combined heat and power production are briefly analyzed. The major part of this work has been focused on the development of a micro-CHP system based on an organic Rankine cycle operating on renewable energies intermittent and non-intermittent (solar and wood). The working fluids have been analyzed to allow reaching high thermodynamic performance. The different promising technologies, for each components of the system are identified, depending on the working fluid. A special test bench has been designed and realized to test and characterize an oil-free vapor scroll expander suitable for our application. The different components have been sized using computerized tools developed for the modeling of the Organic Rankine cycle. A dynamic simulation tool has been developed to simulate the annual performance of the micro-CHP system operating under different climate conditions and thermal loads. Results show that the micro-CHP system could save more than 40% of the primary energy consumption and up to 60% of CO2 emissions. The Levelized electricity cost has been calculated using economic analysis; results show that the electricity cost (~ 50 c€/kWhel) is still high compared to other technologies.
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Bernard Aoun. Micro combined heat and power operating on renewable energy for residential building. Engineering Sciences [physics]. École Nationale Supérieure des Mines de Paris, 2008. English. ⟨NNT : 2008ENMP1565⟩. ⟨pastel-00005092⟩

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