In order to analyze the impact of heat source type and building function on the energy consumption level and distribution characteristics

find out the existing problems

and provide scientific guidance for the selection of heat source type and the optimization of operation strategy of public buildings in Tianjin

China

the building structure information

cold and heat source type and operation energy consumption data of 195 public buildings are collected by on-site investigation and statistics. The heating energy consumption and non-heating energy consumption are analyzed by graphical method and quartile method. The results show that the heat source of urban central heating accounted for the highest proportion

63.07 %. The building energy consumption using coal-fired boiler is the highest

which is 109.61 kWh/(m

2

∙a)

and the building energy consumption using ground source heat pump is the lowest

which is 31.90 kWh/(m

2

∙a). In different types of public buildings

the energy consumption of school buildings is the lowest

which is 24.53 kWh/(m

2

⋅a)

and the distribution is the most concentrated

while the energy consumption of cultural places is the highest

which is 81.64 kWh/(m

2

⋅a)

and the distribution is the most scattered. Through on-site investigation

some problems in building envelope

energy supply equipment and operation methods are found out

and corresponding energy

-saving measures are put forward

which provides guidance for reducing energy consumption of public buildings.