Research On Thermal Comfort Of Radiant Heating

At present ,structure heating develop quickly in our nation。Traditional heating systems have great limitations。The new heating model come forth。This force to strengthen environmental protect ,to reform by reasons of energy structure's changing。The new heating regulations from government in our nation come on increasingly。It establish nice base for research on new heating model。This is the social background of the paper。The thesis use Fluent software,based on computational fluid mechanics and heat transfer theory, on dwelling house in Wu Han for physical model,to set up four different kinds of mathematical model in ceiling heating,floor heating,radiator heating and air conditioner heating。This paper is based on the theoretically analysis of physical and mathematical model, method of SIMPLE are adopted to simulate the there-dimensional air distribution of air conditioned-room, the wall function is used for the boundary condition。Governing equation discrete, solving of the conjugated algebraic set and SIMPLE method are also discussed in this paper。This paper is mainly to couple numerically simulates three different heating,to compare and analyse thermal comfort in artifical environments from indoor temperature,air velocity,PMV(Predicted Mean Vote)and PPD (Predicted Percent Dissatisfied)。It showed that when indoor designed temperature is 18℃,in the vicinity of people activity,the change of temperature is even。But the grads of floor heating is lowest and its thermal comfort is best。In some place of air conditioner heating ,air speed exceeds indoor criterion in winter,so people have strong sense of blow。Based on international standard—ISO 7730 recommended PMV—PPD,radiator heating,ceiling heating and floor heating have respective characteristics,but thermal comfort in ceiling heating displays its predominance,air conditioner heating is not a suitable kind of heating。...