Research on the influence of environmental factors on solid heat collection system

Abstract

Heat collection from thermal radiation in the hydronic system of slab simulated to the solar collection on road in the summer was studied. An experimental system of thermal radiation was established to study influences of objective factors and their functions, such as thermal radiation intensity, wind speed, etc. The radiation intensity and wind speed of the slab surface experiments include the studies of heat collection quantity per surface area, temperature difference per pipe length, heat collection efficiency, and temperature of collection surface. The result showed that with increase of radiation intensity of slab surface, heat collection quantity increased but heat collection efficiency decreased. Under the unimodal dynamic radiation density, variation curves of the parameters which characterize the heat collection capacity follow an unimodal form, while variation curve of the heat collection efficiency is contrary to that of radiation intensity. The thermal response to this solid structure collection system has a significant delaying effect, in which heat capacity of solid structure is an important constraining factor. Therefore, these influencing factors and their effects have considerable importance for designing a solar energy collection system on road.