In order to investigate the differential process of radiant heat action among various urban underlying surfaces,four types of substrates(grass,concrete,paving blocks and asphalt)were selected as research subjects,measurements were conducted on the short-wave radiation intensity reflected by different underlying surfaces,upward long-wave radiation intensity,surface heat flux intensity,air temperature,wind speed and other environmental parameters.The differences in radiant heat transfer process between the different sub-bedding surfaces were analyzed and compared.The results show that atmospheric inverse radiation accounts for more than 65%of the radiant heat absorbed by the underlying surfaces,and all four types of underlying surfaces release more than 75%of the heat in the form of long-wave radiation;the heat transfer between the underlying surfaces and the air is mainly carried out in the form of radiation heat transfer;the thermal stability of grass is the best in summer,and the thermal stability of concrete underlying surfaces is the worst;the thermal stability of concrete is the best in winter,and the thermal stability of paving blocks is the worst.
solar buildingsolar buildingunderlying surfacesradiant heat processheat conductionradiant heat transfer
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