首页|Investigation of heat transfer Exergy loss number and its application in optimization for the shell and helically coiled tube heat exchanger
Investigation of heat transfer Exergy loss number and its application in optimization for the shell and helically coiled tube heat exchanger
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NSTL
Elsevier
In this study, the Exergy analysis of the shell and helically coiled tube heat exchanger (SHCTHX) were investigated. The heat transfer Exergy loss of the SHCTHX implemented by MATLAB software was developed, where the dimensionless number named heat transfer Exergy loss number (ξHT) was proposed. The effect of parameters (core tube diameter (DC), space between the shell and the core tube (ΔDBC), inner diameter of coiled tube (di), thickness of the coiled tube (dt) and mass flow rate (Mshell)) on the effectiveness (ε), heat transfer Exergy loss number (ξHT) and number of transfer unit (NTU) were investigated. Moreover, the optimization of the SHCTHX was studied. When the design parameters are set as DC, ΔDBC, di, and dt, there is coincidently opposite variation trend for ξHT and ε, the optimization results of which are identical. When the design parameters are set as DC, ΔDBC, di, dt and Mshell, the effectiveness (ε) of optimization results with ξHT is 30% larger than that without ξHT; while the heat transfer area, the overall heat transfer coefficient, the needed mass flow rate and the heat transfer irreversible loss of optimization results with ξHT have reduction of 30%, 15%, 30% and 10% than those without ξHT.
Exergy lossExergy loss numberMulti-objective optimizationShell and helically coiled tube heat exchangerThermodynamic model
Han Y.、Zhu Y.-J.、Wu X.-H.、Jin T.-X.、Li J.-N.、Zhang C.-C.
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School of Energy and Power Engineering Zhengzhou University of Light Industry
Beijing Key Laboratory of Heat Transfer and Energy Conversion Beijing University of Technology
NSTL
Elsevier
