期刊
ENERGY AND BUILDINGS
卷 155, 期 -, 页码 198-206出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.enbuild.2017.09.022
关键词
Radiant floor heating; Thermal performance; Test standard; Non-heating surface
资金
- China Postdoctoral Science Foundation [2016M600189]
- Opening Funds of State Key Laboratory of Building Safety and Built Environment [BSBE2016-09]
- Science and Technology Project of Urban -Rural Construction Commission of Tianjin Municipality
Heat output and uniformity of surface temperature distribution are primarily concerned by designers and users of radiant floor heating. The testing approach, testing conditions and calculation of the heat output at each stage of program are different among the test standards. In this paper, a mathematical model to calculate surface temperature and heat output of radiant floor heating system was proposed. Measured data from experiments was used to validate the proposed model. Based on this simulation model, four current test standards in China, Europe, America and Japan were simulated. The simulation results show that the heat output of the same sample is different under the four test standards. Meanwhile, simulations were carried out at various non-heating surface temperatures. The results indicate that the non-heating surface temperature has a significant impact on the heat output of the radiant floor. The differences in the simulations of heating capacity vary from 2% to 7%. Hence, a parameter, the temperature difference between average water temperature of test sample and area weighted average temperature of non heating surfaces, is introduced to revise the heat output characteristic equation based on the Chinese test standard. (C) 2017 Elsevier B.V. All rights reserved.
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