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Open AccessArticle

New Criteria to Characterize the Waste Heat Recovery

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Laboratory of Energetics, Theoretical and Applied Mechanics (LEMTA), URA CNRS 7563, University of Lorraine, 54518 Vandoeuvre-lès-Nancy, France
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Department of Engineering Thermodynamics, University POLITEHNICA of Bucharest, 060042 Bucharest, Romania
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INVIVO Consulting, 13 rue de Clermont, 44000 Nantes, France
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Laboratoire de Chimie Moléculaire et Génie des Procédés Chimiques et Energétiques (CMGPCE), Conservatoire National des Art et Métiers, 75003 Paris, France
*
Author to whom correspondence should be addressed.
Energies 2020, 13(4), 789; https://doi.org/10.3390/en13040789
Received: 3 January 2020 / Revised: 1 February 2020 / Accepted: 2 February 2020 / Published: 11 February 2020
(This article belongs to the Special Issue Exergy Analysis and Optimization of Energy Systems and Processes)
Waste heat recovery is an actual goal. The best way to valorize waste heat is to use it directly with the appropriate level of temperature. If the temperature level is insufficient, many reverse machine configurations are available in order to obtain the appropriate conditions (the most known are heat pumps and heat transformers). Finally, the remaining unused heat could be converted to any noble form of energy (mechanical, electrical essentially). We propose here to examine, with a new point of view, the thermomechanical conversion limit of waste heat. This limit corresponds to adiabatic conversion for an endo-reversible Carnot engine, with a perfect thermal contact at the atmospheric sink (supposed infinite). The Carnot–Chambadal model version is applied to latent and sensible heat recovery cases. The results associated with these two cases differ fundamentally. Comments are provided on the two studied cases, and new criteria to characterize the corresponding waste heat recovery are proposed. View Full-Text
Keywords: waste heat; recovery; criteria; energy; exergy; maximum power; ratios waste heat; recovery; criteria; energy; exergy; maximum power; ratios
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MDPI and ACS Style

Feidt, M.; Costea, M.; Feidt, R.; Danel, Q.; Périlhon, C. New Criteria to Characterize the Waste Heat Recovery. Energies 2020, 13, 789.

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