期刊论文

Numerical Simulation on the Performance of Fabricated Radiant Ceiling Panel

中文

南华大学学报(自然科学版)

1673-0062

2018

32

6

15-21

10.19431/j.cnki.1673-0062.2018.06.003

湖南省科技厅重点研发计划项目（2017SK2394）； 南华大学双一流学科重点建设项目（创新团队）（2018KCX02）;南华大学研究生科学基金项目（2018KYY106）；

本校为第一机构

为提高装配式辐射供冷顶板的性能,建立了一种采用空气层进行热量交换的装配式辐射供冷顶板的数学模型,应用CFD(computational fluid dynamics)技术,数值模拟了耦合冷冻水管辐射顶板空气层的流场和温度场,分析了不同空气层厚度和不同供水温度对辐射顶板热特性的影响.数值模拟结果表明:空气层内由于温度差引起自然对流,辐射板内通过辐射,对流和导热的传热方式,使辐射板表面温度分布更均匀.在保证辐射板表面最低温度高于室内露点温度的条件下,随着空气层厚度和供水温度的增加,辐射板的表面平均温度升高,供冷能力下降.空气层厚度和供水温度的增加或减小会降低辐射板表面温度分布的均匀性.

In order to improve the performance of fabricated radiant ceiling panel,the study established a mathematical model of the fabricated radiant ceiling panel using air layer for heat exchange.The flow field and temperature field of the air layer of the fabricated radiant ceiling panel were numerically simulated by computational fluid dynamics(CFD)technology and the influence of different air layer thickness on the thermal characteristics of the radiant panel was analyzed.The simulation results show that the natural convection was caused by the temperature difference in the air layer;through the r...