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BioMed Research International
Volume 2018 (2018), Article ID 2158205, 9 pages
Research Article

Energy Analysis of a Complementary Heating System Combining Solar Energy and Coal for a Rural Residential Building in Northwest China

1Western China Energy & Environment Research Center, Lanzhou University of Technology, Lanzhou 730050, China
2Key Laboratory of Complementary Energy System of Biomass and Solar Energy, Lanzhou, Gansu Province 730050, China
3Collaborative Innovation Center of Key Technology for Northwest Low Carbon Urbanization, Lanzhou 730050, China
4Shaanxi Key Laboratory of Industrial Automation, Shaanxi University of Technology, Hanzhong 723000, China

Correspondence should be addressed to Jinping Li

Received 30 November 2017; Accepted 22 January 2018; Published 14 February 2018

Academic Editor: Ningbo Gao

Copyright © 2018 Xiaofei Zhen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


In order to utilize solar energy to meet the heating demands of a rural residential building during the winter in the northwestern region of China, a hybrid heating system combining solar energy and coal was built. Multiple experiments to monitor its performance were conducted during the winter in 2014 and 2015. In this paper, we analyze the efficiency of the energy utilization of the system and describe a prototype model to determine the thermal efficiency of the coal stove in use. Multiple linear regression was adopted to present the dual function of multiple factors on the daily heat-collecting capacity of the solar water heater; the heat-loss coefficient of the storage tank was detected as well. The prototype model shows that the average thermal efficiency of the stove is 38%, which means that the energy input for the building is divided between the coal and solar energy, 39.5% and 60.5% energy, respectively. Additionally, the allocation of the radiation of solar energy projecting into the collecting area of the solar water heater was obtained which showed 49% loss with optics and 23% with the dissipation of heat, with only 28% being utilized effectively.