Optimization Analysis of an Energy-Saving Renovation Scheme for Building Envelopes of Existing Rural Houses Based on a Comprehensive Benefit Evaluation

• Published in: Buildings (Basel) 2024-02, Vol.14 (2), p.454
• Main Authors: Cao, Ping, Sun, Qingshi, Li, Huajun, Jiao, Yuanhang
• Format: Article
• Language: English
• Subjects: Aluminum; Architecture and energy conservation; building envelope; Building envelopes; Buildings; Carbon; China; Cities; Cold; Cold regions; Comparative analysis; comprehensive benefit evaluation; Costs; Emission analysis; Emissions; Emissions (Pollution); Emissions control; Energy conservation; Energy consumption; Energy industry; Energy management systems; energy saving; Energy use; entropy value method; Envelopes; Environmental impact; Green buildings; Greenhouse gases; Heat; Heating; Houses; Housing; Indoor environments; Insulation; Methods; Optimization; orthogonal experiment; Protection and preservation; Reforming; Remodeling, restoration, etc; Renovation & restoration; Residential areas; Return on investment; Roofing; Rural areas; Rural development; Rural environments; Rural housing; Seasons; Solar energy; Temperature; Thermal environments; Thickness; Winter
• ISSN: 2075-5309; 2075-5309
• DOI: 10.3390/buildings14020454

In the cold regions of China, the existing rural houses are widely distributed and in large numbers. There are widespread problems such as low thermal performance of building envelopes, high building energy consumption, and poor indoor thermal environments. Reducing the energy consumption of building heating by reforming the envelope structure can reduce the environmental pollution caused by heating. In this paper, the existing rural houses in Tongchuan City, Shaanxi Province are taken as the research object, and EnergyPlus software is used to calculate building heating energy consumption, and the schemes are compared and selected via the entropy value method. Based on a comprehensive benefit evaluation, the best scheme for the renovation of building envelopes of rural houses in Tongchuan City is put forward. The research results show that the energy saving rate of buildings can reach more than 50% after renovation. In the evaluation of energy saving, incremental cost, return on investment, carbon emission reduction and unguaranteed hours, the weights are 0.1915, 0.2104, 0.2312, 1755, and 0.187, respectively. The best renovation scheme for rural housing is as follows: the thickness of the XPS board is 90 mm for exterior wall insulation; the thickness of the XPS board is 80 mm for roof insulation; the window-to-wall ratio of additional sunspace is 0.6; and the type of exterior windows is a broken-bridge hollow aluminum window of 6 + 12A + 6 (mm).