The performance of radiation cooler for an oscillating fluid flow

Affiliation of Author(s):航天学院

Journal:ENERGY

Key Words:Oscillating fluid flow Radiation cooling Temperature distribution Fin length Fin width Emissivity

Abstract:In this work, a radiation cooler performance for an oscillating channel fluid flow is investigated numerically utilizing the commercial software FLUENT. Fluid is heated by constant heat flux at the channel heating end and cooled at cooling end, which through heat pipes transferring fluid heat flux to the radiation cooler. Then, the cooled fluid inversely flows to the heating end periodically. The dynamic grid technology is applied to simulate the oscillating fluid flow and heat transfer in the cooler channel. The temperature distribution and cooling efficiency are investigated for the influence of various emissivity epsilon(f), radiation fin width h and fin length H. The results show that the total radiation surface and cooling efficiency of cooler increase linearly with the rising surface emissivity ef. Heat flux per unit mass of the radiation surface Q(out)/M decreases initially with the increase of radiation fin length H and then tends to be a constant, while increases logarithmically with the increment of radiation fin width h. From the first heat pipe R1 to last one of the flow channel, temperature of radiation surface decreases with "corrugated" distribution pattern. Temperature difference of the radiation surface is less than 4 K. (C) 2017 Elsevier Ltd. All rights reserved.

Indexed by:Journal paper

Discipline:Engineering

First-Level Discipline:Power Engineering and Engineering Thermal Physics

Document Type:J

ISSN No.:0360-5442

Translation or Not:no

Date of Publication:2017-03-15

Co-author:zhuguiping

Correspondence Author:hhl

Date of Publication:2017-03-15