Study on index of heat loss in revision of Beijing local standard DB 11/891-2012 Design standard for energy efficiency of residential buildings

Presents the selection method and principle of index of heat loss in the revision of Beijing local standard DB 11/891-2012 Design standard for energy efficiency of residential buildings. Puts forward the concept of surface factor, and changes the thermal parameter prescriptive indicators of building envelope and energy consumption indicators to be classified according to the building surface factor. After the revision, the index of heat loss should be calculated using the dynamic hourly simulation method. Proposes the guiding value and current value of the index of heat loss, and gives two correction coefficients of building orientation and south-facing window-wall area ratio.