Influence of sample number on accuracy of air conditioning energy consumption survey in residential buildings

It is an important basic problem to be urgently studied and solved in residential air conditioning energy consumption survey how to reasonably determine sample number. Based on a great deal of the survey data of residential air conditioning energy consumption in Beijing and Wuhan, the relationship between the accuracy and the sample number is studied with the method of random sampling test. The survey results show that as to an air conditioning energy consumption survey of large numbers of households, in order to achieve higher investigation accuracy, the sample quantity should not be less than 140 households for cold zones in north China or 100 households for hot zones in south China. The results provide a reference for the surveys of residential air conditioning energy consumption and other related surveys.