Computation of thermal environment of light-weight steel temporary house under natural ventilation condition

In order to investigate the air temperature variations within the envelope and inside the light-weight steel temporary house under natural ventilation condition,a geometric model based on one standard light-weight steel temporary house was established;and the one-dimensional unsteady heat transfer equation was established to simulate the thermal transfer of the building envelope.Also the thermal balance equation was combined with the natural ventilation to simulate variation of the indoor air temperature and the natural ventilation of the building.The meteorological data of one summer day in south China was used to compute the temperature variation of building's envelope and indoor air within 24 hours.The computation results show that the EPS sandwich board has a satisfied heat-insulating performance.However,internal surface temperature of the roof becomes relatively high when the sunshine becomes strong.Hence,heat insulation of the roof should be further improved.Under the condition of natural ventilation,variation of the outdoor air temperature has obvious influence to the indoor air temperature.