Abstract
The gas boiler house is responsible for heating 308,000 m2 of residents in the community, and the historical heating energy consumption reached 3,000 tons of standard coal in 2012. The heating energy consumption index in this community is higher than that of heating energy consumption index in other residential communities. The heating system in this community is tested and analyzed comprehensively in this paper. The three aspects of heating system heat source, pipe network transmission and distribution and thermal user are combed and analyzed in this paper, to look for the energy-saving potential of each link. It is found that the exhaust gas temperature is 175℃ through the test of thermal efficiency of 2 # boiler in XX Community, and the heat loss of exhaust gas is higher. Meanwhile, it is found that the exhaust gas temperature is too high in all boilers through checking the operation record. It is found that the system water recharge is larger and the problems of leaking and aging thermal insulation layer and pipeline appear in the heating network through operation record analysis and on-site inspection. The analysis shows that there is a problem of hydraulic imbalance through the on-site test on the wall temperature of the supply pipe of the hot water supply wells in the residential buildings near, middle and far-ends. Analyze the problem existing in the heating system in XX Community, and put forward some corresponding energy saving technical proposals, such as flue gas condensing waste heat recovery, hydraulic balance adjustment and pipeline insulation improvement according to on-site survey and analysis; meanwhile, estimate the energy saving effect and the investment payback period.
It is expected to realize the energy saving 728.72 tce and energy saving benefit of 1.4415 million yuan through three measures for energy saving and technicalm transformation. Estimated investment cost is 3.16 million yuan.