2010全国生物材料大会论文集之 (2022).pdf

Study on Thermal Efficiency of Gas-Fired Vacuum Hot Water Boiler with
Installing Flue Gas Condensing Waste-Heat Exchanger

Pan Zhixin Niu Jianhui Lu Chunping Zhang Zhihong Zhu Junjun
Department of Urban Construction, Hebei Institute of BeiJing KD Navien Heat Energy Equipment Co.,LTD
architectural Engineering
Zhangjiakou, China
email: hh196325@


Abstract─Gas-fired vacuum hot water boiler with installing a flue temperature of flue gas, water vapor of the flue gas will be
gas condensing waste-heat exchanger was taken as the research condensed and then release latent heat of vaporization, this
object, through theoretical analysis and calculation with respect can markedly increase the boiler thermal efficiency.
to energy saving and emission reduction to the boiler which The ponent of natural gas is
heating load was , the boiler thermal efficiency could be
methane (CH4). In the study, methane is assumed to be the
increased by % and the emissions of CO2 could be decreased
by m3/h after setting the flue gas condensing waste-heat position of natural gas in order to simplify
exchanger. It had no corrosion to flue duct and no pollution to calculation. The following is its reaction equation:
atmospheric environment after through desulphurization
+ α()()()()+ = + φ+ −φ⋅
treatment to the gas, so the boiler had great economic and