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A New Simple Method for Estimating Exergy Destruction in Heat Exchangers
Energy and Fluid Mechanics Department (ETSII), Universidad Politécnica de Madrid, José Gutiérrez Abascal 2, 28006 Madrid, Spain
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Received: 3 December 2012; in revised form: 11 January 2013 / Accepted: 22 January 2013 / Published: 28 January 2013
Abstract: This paper presents an abbreviated method for estimating exergy destruction in a heat exchanger, requiring only black-box data of the exchanger’s inputs and outputs, and eliminating part of the mathematical difficulties associated with the calculations. A well-known model for temperature distributions in an exchanger is adapted for this case, and is used to distinguish between the contributions of the three major causes of the total exergetic loss: heat transfer, fluid friction and energy dissipation to the surroundings. This provides insight into the relative importance of the three, allowing for identification of potential improvements to a given design.
Keywords: irreversibility; second law analysis; heat exchanger; thermodynamics; heat transfer
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López Paniagua, I.; Rodríguez Martín, J.; González Fernandez, C.; Jiménez Alvaro, Á.; Nieto Carlier, R. A New Simple Method for Estimating Exergy Destruction in Heat Exchangers. Entropy 2013, 15, 474-489.
López Paniagua I, Rodríguez Martín J, González Fernandez C, Jiménez Alvaro Á, Nieto Carlier R. A New Simple Method for Estimating Exergy Destruction in Heat Exchangers. Entropy. 2013; 15(2):474-489.
López Paniagua, Ignacio; Rodríguez Martín, Javier; González Fernandez, Celina; Jiménez Alvaro, Ángel; Nieto Carlier, Rafael. 2013. "A New Simple Method for Estimating Exergy Destruction in Heat Exchangers." Entropy 15, no. 2: 474-489.