Rational selection method for near-extreme coincident air conditioning design weather parameters with solar irradiation

Presents a statistic method for rationally selecting coincident solar irradiation, dry bulb and wet bulb temperatures. The method combines the three weather parameters and building characteristics into a single impact factor—equivalent temperature—based on the principle of heat transfer, ensuring that the joint probability of occurrence of the three parameters can match the capacity reliability level of air conditioning systems. Applies the method to weather data of Hong Kong to generate the coincident design weather parameters and compares them with those data obtained by conventional method. The results indicate that the latter data may be significantly overestimated in some conditions, and that the new method can calculate peak cooling load directly and simplifies design cooling load calculation.