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Performance and Irreversibility Analysis of Spiral Plate Heat Exchangers
Author(s) -
Sabouri Shirazi Amir Hossein,
Ghodrat Maryam,
Jafari Nasr Mohammad Reza
Publication year - 2020
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.202000727
Subject(s) - heat exchanger , heat transfer , thermodynamics , enthalpy , entropy (arrow of time) , mechanics , spiral (railway) , flow (mathematics) , mathematics , entropy production , heat transfer coefficient , mathematical optimization , physics , mathematical analysis
Herein, a model is developed based on energy balance equations to analyze and improve the performance of single‐phase counter‐current and co‐current flow spiral plate heat exchangers (SPHEs). The aim is to comprehensively check the performance and irreversibility factors based on energy, entropy, and entransy methods. First, a new optimization algorithm is proposed to maximize pressure drops and minimize the total cost by considering the geometric proportion of the SPHE. Second, the SPHE spiral turns are modeled as a series‐connected equivalent internal heat exchangers network to determine the temperature boundaries and develop the temperature–enthalpy diagram in analysis. The algorithm and modeling is validated in two stages for different flow arrangement SPHEs. Performance and irreversibility analysis shows similar result trends in different flow patterns. In third stage, a wide range of counter‐current flow SPHEs with constant heat transfer rate is designed, modeled, and analyzed by energy, entropy, and entransy methods. To recapitulate, results assert that SPHEs designed by new algorithm have higher overall heat‐transfer coefficient and compactness. Although entropy and entransy analyses reveal irreversibility trends with effectiveness in SPHEs, entransy analysis is more effective and reliable to analyze the SPHEs.