Finite time thermodynamic analysis and optimization of water-cooled multi-split heat pipe system (MSHPS)

International Journal of Civil Engineering

© 2020 by SSRG - IJCE Journal

Volume 7 Issue 9

Year of Publication : 2020

Authors : Feihu Chen, Shuguang Liao, Quan Zhang

10.14445/23488352/IJCE-V7I9P102

How to Cite?

Feihu Chen, Shuguang Liao, Quan Zhang, "Finite time thermodynamic analysis and optimization of water-cooled multi-split heat pipe system (MSHPS)," SSRG International Journal of Civil Engineering, vol. 7,  no. 9, pp. 7-16, 2020. Crossref, https://doi.org/10.14445/23488352/IJCE-V7I9P102

Abstract:

This study focuses on the evaporation terminal's heat transfer characteristics and the cooling delivery unit (CDU). Flow distribution of the water-cooled multi-split heat pipe system (MSHPS) is used in the data center. The finite-time thermodynamic analysis and the exergy method is employed. Then the thermodynamic simulation software SIMULINK was hired to build the simulation model of the combined system. It shows that the period of working fluid passing through the heat exchanger is about 6 seconds. When the liquid to gas ratio is greater than 0.72, the heat transfer efficiency reduces greatly. The IT server is suggested to arrange at the location below 1.3 meters. And a CDU of 12 kW has a heat transfer of about 74W in 6 seconds. The optimum flow rate of CDU is 0.82 kg/s, and the corresponding heat transfer efficiency is 0.81. A certain cooling capacity distribution unit (CDU), which connects 2 heat pipe evaporator terminals of 10kW, was calculated, and the working fluid is R22. The error of the mass flow of the branch is about 6.7%. The Cop and exergy efficiency ƞ of the MSHPS is 4.6 and 0.43 in Wuhan city (29° 5′N and 115°5′E). The Cop and exergy efficiency ƞ、using time and energy-saving potential in China's major cities were investigated and studied. The results are of great significance for the operational control and practical application of an MSHPS and other pipe-net systems

Keywords:

finite time thermodynamic analysis; exergy method, IDC room, heat pipe airconditioning system, MATLAB/SIMULINK Software, refrigerant distribute characteristic

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