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Article

Study on Passive Heating Involving Firewalls with an Additional Sunlight Room in Rural Residential Buildings

Faculty of Environmental Engineering, The University of Kitakyushu, Kitakyushu 808-0135, Japan
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Author to whom correspondence should be addressed.
Academic Editors: Shu-Yuan Pan, Li-Chi Chiang and Yu-Pin Lin
Int. J. Environ. Res. Public Health 2021, 18(21), 11147; https://doi.org/10.3390/ijerph182111147
Received: 13 September 2021 / Revised: 17 October 2021 / Accepted: 20 October 2021 / Published: 23 October 2021
(This article belongs to the Special Issue Engineering for Sustainable Environment)
With the growth in China’s economic GDP, energy consumption has increased year by year. The energy demand of rural residential buildings is 223 million tons of standard coal equivalent, accounting for 24% of the national energy demand. Therefore, an energy-saving design for rural residences is necessary. This research took the traditional residences in southern Shaanxi as the research object and combined the cooking methods in southern Shaanxi with solar heating, proposing a sunlight heating system with an additional firewall. The system is composed of a firewall system and a sunlight system. The combination of the two systems prolongs the heating time and makes up for the lack of intermittent heating. The firewall principle involves using the heat generated by cooking through the heat storage and heat release capacity of the wall, and using the principle of heat radiation and convection to increase the indoor temperature. Meanwhile, the principle of the additional sunlight room involves using the external facade of the building to establish an additional sunlight room, by absorbing the heat radiation of the sun and using the principle of heat transfer from the wall. The rapid loss of indoor hot air is avoided, the heating time is prolonged, and part of the heat is retained, thereby improving the heating efficiency. A model was established based on the typical residential model in southern Shaanxi, and the presence or absence of solar radiation on the wall was used as the research variable. Using ANSYS software to simulate the analysis, it is concluded that the firewall–sunlight system can extend the heating time and meet the continuous heating demand, and the heating effect is better than that of the firewall heating system alone. When the walls have solar radiation, the annual heat load reduction rate of the buildings under the new system is 20.21%. When the walls do not have solar radiation, the annual heat load reduction rate of the buildings under the new system is 8.56%. View Full-Text
Keywords: firewall–additional sunlight system; passive heating; rural residential buildings; southern Shaanxi; software analysis firewall–additional sunlight system; passive heating; rural residential buildings; southern Shaanxi; software analysis
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MDPI and ACS Style

Yang, S.; Dewancker, B.; Chen, S. Study on Passive Heating Involving Firewalls with an Additional Sunlight Room in Rural Residential Buildings. Int. J. Environ. Res. Public Health 2021, 18, 11147. https://doi.org/10.3390/ijerph182111147

AMA Style

Yang S, Dewancker B, Chen S. Study on Passive Heating Involving Firewalls with an Additional Sunlight Room in Rural Residential Buildings. International Journal of Environmental Research and Public Health. 2021; 18(21):11147. https://doi.org/10.3390/ijerph182111147

Chicago/Turabian Style

Yang, Simin, Bart Dewancker, and Shuo Chen. 2021. "Study on Passive Heating Involving Firewalls with an Additional Sunlight Room in Rural Residential Buildings" International Journal of Environmental Research and Public Health 18, no. 21: 11147. https://doi.org/10.3390/ijerph182111147

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