Abstract:

In the paper the greenhouse gas (GHG) emission accounting methods for public buildings in operation is put forward, the cases study is done and some advices on the methodology of accounting GHG emissions from public buildings in future carbon emission trading market are given. It shows that the emission is accounted by activity level multiply emission factor, and the emissions include GHG emission from combustion of fossil fuels, GHG releases from equipment and systems, GHG removals from newly planted trees, and emission from purchased electricity and heat. The case study shows that the emission from purchased electricity and heat accounts for 88.32%, the emission from refrigeration and air-conditioning, from fire extinguishers and CH₄ emission from the digestion tanks are small. The newly planted trees absorb 4.22% of the CO₂ emissions, which is also small. The emission from combustion of fuels in mobiles sources accounts for 11.99%, whether it should be considered is determined by the use of the emission data. For future carbon emission trading market of China, the accounting scope for public buildings is suggested that includes GHG emission from combustion of fossil fuels and the emission from purchased electricity and heat.

Key words: public buildings, greenhouse gases, carbon emissions, accounting methodology