One-dimensional steady-state mathematical model of a novel loop heat pipe with liquid line capillary wick

Meng Fanxi,Xiaowei Ma,Sheng Du,Chang Yue,Quan Zhang

doi:10.1177/0144598719881543

Meng Fanxi, Xiaowei Ma + Show 3 more

Open Access

https://doi.org/10.1177/0144598719881543

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Journal: Energy Exploration & Exploitation	Publication Date: Oct 10, 2019
Citations: 5	License type: CC BY 4.0

Affiliation: Hunan University

Abstract

A novel loop heat pipe used for data center with a liquid line wick is designed, and its one-dimensional steady-state mathematical model is developed based on the energy and thermodynamic equilibrium of each component and the simulation results were validated by comparing with the experimental data in this work. The compensation chamber of the loop heat pipe was removed, and a section of capillary wick was added in the end of liquid line in order to reduce heat leakage and vapor backflow and increase working medium circulation power. The mathematical model of the novel loop heat pipe can be used to predict the operating temperature of each characteristic point with small relative errors of <13%. A parametric study of the steady-state performance characteristics including the effects of material, diameter, length, and porosity of liquid line wick are conducted, which provides a powerful basis for the design of novel loop heat pipe experiment.

Highlights

With the rapid development of electronic and communication technology, data center has been built intensively
In order to verify the accuracy of the mathematical model, the steady-state temperature data in the novel loop heat pipe (LHP) experiment was compared with the simulation results, and the average temperature of the LHP with 10 min interval under steady-state operation was taken
The simulation results of the novel LHP 1-D steady-state model are in good agreement with the experimental data and their relative error is below 13%, indicating that the model can predict the temperature of the heating surface, evaporator, condenser outlet, and liquid line capillary wick inlet very well when the LHP runs steadily

Summary

Introduction

With the rapid development of electronic and communication technology, data center has been built intensively. When the heat transfer process in the LHP reaches a stable state, the energy balance in the liquid line wick can be expressed by equation (19) (see Figure 2)

Results

Conclusion