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Open AccessArticle

Energy and Exergy Analysis and Optimization of Combined Heat and Power Systems. Comparison of Various Systems

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Laboratoire d’Energétique et de Mécanique Théorique et Appliquée (LEMTA), Lorraine University, UMR CNRS 7563, 2 Avenue de la Forêt de Haye, 54516 Vandoeuvre-Les-Nancy Cedex, France
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Department of Engineering Thermodynamics, Engines, Thermal and Refrigerating Equipment, University “Politehnica” of Bucharest, Splaiul Independentei 313, 060042 Bucharest, Romania
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Author to whom correspondence should be addressed.
Energies 2012, 5(9), 3701-3722; https://doi.org/10.3390/en5093701
Received: 14 July 2012 / Revised: 3 September 2012 / Accepted: 19 September 2012 / Published: 24 September 2012
(This article belongs to the Special Issue Exergy Analysis of Energy Systems)
The paper presents a comparison of various CHP system configurations, such as Vapour Turbine, Gas Turbine, Internal Combustion Engine, External Combustion Engine (Stirling, Ericsson), when different thermodynamic criteria are considered, namely the first law efficiency and exergy efficiency. Thermodynamic optimization of these systems is performed intending to maximize the exergy, when various practical related constraints (imposed mechanical useful energy, imposed heat demand, imposed heat to power ratio) or main physical limitations (limited heat availability, maximum system temperature allowed, thermo-mechanical constraints) are taken into account. A sensitivity analysis to model parameters is given. The results have shown that the various added constraints were useful for the design allowing to precise the influence of the model main parameters on the system design. Future perspective of the work and recommendations are stated. View Full-Text
Keywords: thermodynamics; optimization; combined heat and power systems; exergy efficiency; First Law efficiency; constraints thermodynamics; optimization; combined heat and power systems; exergy efficiency; First Law efficiency; constraints
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Feidt, M.; Costea, M. Energy and Exergy Analysis and Optimization of Combined Heat and Power Systems. Comparison of Various Systems. Energies 2012, 5, 3701-3722.

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