Coupling Study On Heat-storage Characteristics And Natural Ventilation For South Of Xinjiang

The purpose of this study is designing passive solar building with zero energy consumption for Hotan of Xinjiang Province based on meteorological condition of this region. First of all , the passive solar building model for Hotan has been built with DesignBuilder, an interface of EnergyPlus, and the thermal environment of winter has been simulated overall. It is observed from the simulation result of thermal environment in this model, the operative temperature is much higher than the dry bulb temperature outdoor, and the increment is about 10℃.The operative temperature of room with direct benefit window structure is 8-15℃higher than outdoor temperature in most of daytime; the operative temperature of room with Trombe wall structure is 10-15℃higher than outside temperature in all day; the operative temperature of room with sunspace structure is 12-15℃higher than outside temperature in all day. The comfort temperature standard for passive solar house of zero energy consumption has been satisfied with 12℃in articles. Since the temperature increment rest with the amount of solar radiation on that day, it can improve the initial thermal environment of residential building through using solar energy passively. The three type passive solar house structures has notable effect in improving the initial thermal environment of houses ,depressing energy consumption, save heating cost in this region, can be feasible for developing and expanding.Then, the room with heat collection and storage wall (Tombe wall) has been modeled and simulated with Airpak, a CAE software for simulating indoor air flow condition.The indoor airflow and temperature distribution has been simulated and the effect of natural ventilation of this passive solar room has been evaluated at 14o'clock(the time with the most solar radiation) of one day in winter typical week. For north wind is the most occurrence frequency of this region, opening vent for natural ventilation has been set in north side of the room, and the size of vent for mineral air changes has been determined in a certain guarantee rate by average wind velocity on that day. It is observed that, Trombe wall can inspire the airflow circulation caused by hot press induction, and the indoor air could be heated up to 10 ℃ more or less, higher than outdoor temperature with 5-10℃,the cold and hot airflow are mixed well, and the temperature distribution is uniformly.