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Your search keyword '"Xie, Junlong"' showing total 36 results
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36 results on '"Xie, Junlong"'

22. The experimental study of a novel metal foam heat pipe radiator

Author

Xie Junlong, Xu Shenming, Wang Yupeng, Chen Huanxin, Yu Ran, and Shen Limei

Subjects
Materials science, 020209 energy, Heat transfer enhancement, Thermal resistance, chemistry.chemical_element, 02 engineering and technology, Metal foam, Copper, Heat pipe, 020401 chemical engineering, chemistry, visual_art, Heat transfer, Electronic component, 0202 electrical engineering, electronic engineering, information engineering, Radiator (engine cooling), visual_art.visual_art_medium, 0204 chemical engineering, Composite material
Abstract

Heat pipe radiators are popular as heat dissipation system of electronic components due to high heat transfer efficiency and reliability. This study proposed a metal foam heat pipe radiator to enhance heat transfer between heat pipe condensed section and air. The prototypes of traditional fins and metal foam heat pipe radiator were produced to validate the heat transfer enhancement. The effect of metal foam pore density on the heat dissipation capability was discussed. The experiment results showed that metal foam heat pipe radiator could improve the start-up time and part-load time in comparison with the traditional fins heat pipe radiator. The thermal resistance of proposed radiators could reduce by 10% when the pore density of copper foam is 5 PPI.

Published
2019

29. Refrigerant flow distributary disequilibrium caused by configuration of two phase fluid pipe network

Author

Lu Hongliang, Tao Hongge, Chen Huanxin, Hu Yunpeng, and Xie Junlong

Subjects
Renewable Energy, Sustainability and the Environment, Mass flow, Flow (psychology), Energy Engineering and Power Technology, Thermodynamics, Mechanics, Refrigerant, Pipe network analysis, Fuel Technology, Nuclear Energy and Engineering, Drag, Two-phase flow, Evaporator, Geology, Network model
Abstract

The refrigerant mass flow distribution in a two phase fluid network of multi-connected air conditioning units (MAU) is generally uniform in the available literature based on the assumption that the fluid resistance of the pipes connecting the evaporators is ignored. However, such a fluid network of multiple evaporators and connecting pipes is actually a complex two phase direct return system, which leads to refrigerant flow distributary disequilibrium, for which few investigations have been conducted. In this paper, with pipe and local fluid resistance considered, fluid network theory was employed to develop a MAU fluid network model as a series of fluid circuits of components including single phase and two phase pipes, two phase electronic expansive valve (EEV), evaporator and pipes in parallel or series. A particular iterating control algorism was designed to distribute the refrigerant mass flow in proportion to the corresponding fluid resistance. For a given refrigerant fluid network with five indoor units, it is concluded by the model that the closer an indoor unit is to the centre of the fluid network, the less its mass flow deviates from its nominal value, and the units at the greatest distance from the centre of the fluid network are the ones with maximum disequilibrium. Furthermore, for a fluid network with multiple indoor units, an IDDR was proposed to evaluate the refrigerant distributary disequilibrium.

Published
2009

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