Coupling operation mode of natural ventilation and air conditioning for residential buildings in hot-humid area

Puts forward a controlling method of natural ventilation and air conditioning coupling operation, analyses the controlling process and working principle, and establishes a controlling model of natural ventilation and air conditioning coupling operation for residential buildings in summer condition. Taking Qionghai area for example, obtains the neutral temperature (28.5 ℃) and upper limit of acceptable temperature (30.5 ℃) for local inhabitants under natural ventilation condition by investigation. Using these temperatures as judging index, numerically simulates different coupling operation models of natural ventilation and air conditioning for a residential building, and obtains the optimal operation model: when the outdoor temperature rises to 28.5 ℃, turns on air conditioning; when the outdoor temperature drops to 31 ℃, turns off air conditioning and then operates natural ventilation after 1 h; the recommended temperature setting value for air conditioning is 28 ℃. In this operation mode, the energy consumption is 0.59 kW·h/m2, saving 30.5% of energy compared with that of the traditional air conditioning operation mode.