Application and research of biomass solid forming fuel furnace in heating system retrofitting in rural buildings of North China

Yan Ruimiao, Zhang Xinghui, Zhou Ruichen and Qin Chengjun

2019.03.20

Rural heating system in North China has two problems of poor thermal performance of buildings and serious pollution of scattered coal. In order to solve the problem of poor thermal performance, takes a typical rural building as an example to carry out energy retrofitting. Combines the data simulated by EnergyPlus software with measured data, and analyses the feasibility of energy saving retrofitting and actual energy saving effect. Numerical simulation results show that 60% of the energy can be saved, and adding an insulation layer of 50 mm is a highest cost-effective method. In order to solve the problem of serious pollution of scattered coal, compares the heating effect of the biomass solid forming fuel furnace and traditional small-size coal-fired boiler as heat source. In the aspect of thermal comfort, the average temperature is 17.39 ℃ and 14.52 ℃, both meeting the design temperature of 14 ℃. However, indoor PMV values are maintained in the range of -0.08 to 0.24 and -1.18 to 0.18 respectively, the thermal sensation is moderate in the former, while more colder in the latter. In terms of economy, biomass solid forming fuel furnace saves 7 yuan/(m2·a) compared with coal-fired boilers, approximately 465 yuan per year. For the environmental protection, the emission level of biomass boiler is lower than that of the small-size coal-fired boiler.