5 Conclusion
This paper takes the assessment of the low carbonization of clean energy use in rural residential buildings as the research direction, constructs a conceptual framework for low carbonization assessment and an evaluation index system, selects a rural residential building as a research case of the evaluation index system, and applies the index system constructed in the previous paper to assess its low carbonization. The main findings are as follows.
(1) From the perspective of the assessment indicators for the low carbonization of clean energy use in rural residential buildings, the indicator system involves a number of aspects, which have a great deal to do with envelope structure and economic factors in addition to energy utilization, and also have an influence on layout design, building materials and behavioral habits. The weighting of the primary indicators is set at 36.4% for energy utilization, 24.5% for envelope structure, 4.1% for layout design, 5.8% for building materials, 10.2% for behavioral habits and 19.5% for economic factors.
(2) From the case studies, the main reason for the higher level of decarbonization of clean energy use in retrofitted rural residential buildings is the increased use of renewable energy sources such as electricity, biomass and solar energy through both energy utilization and building envelope modifications. In terms of key influencing factors, ”clean energy utilization”, ”share of electricity consumption”, ”external wall insulation system” and ”window performance ” are key influencing factors for the level of decarbonization of clean energy use in a rural residential building.