Abstract
The aim of this paper is to optimize the building shape parameters and envelope parameters influencing the rural building energy consumption in cold winter and hot summer climate. Several typical models are established and optimized by integrated TRNSYS and GenOpt. Single-objective optimization has provided guidance to the multi-dimensional optimization. Building shape and envelope parameters are considered simultaneously by multi-dimensional optimization. Results of the optimization showed significant reduction in terms of EC (energy consumption). When O (building orientation) was SW (south by west) 10°, LWR (length-width ratio) was 1.1, WWRS (window-wall ratio in south) with the range of 0.6–0.8, ITE (insulation thickness of exterior wall) and ITR (insulation thickness of roof) was 0.05 m and 0.08 m respectively, the building had minimal energy consumption. The results also indicated that the optimal EWT (exterior window type) was plastic single-frame Low-E insulating glazing filled with inert gas, and the optimal shape of building is Re (rectangle). An effective method was provided to optimize the design of the rural building for the purpose of reducing building energy consumption in cold winter and hot summer climate.
Highlights
China has more than 600 million people, occupying 24 billion m2 of building space in vast rural area [1]
Rural buildings have higher energy consumption in China due to irrational design Related research shows that poor building envelope is the main reason for the lower temperature of rural buildings in North China [1]
The quantitative relationship between the design parameters of building shape and envelope structure and building energy consumption was studied in Hangzhou rural area, which is located in hot summer and cold winter area
Summary
China has more than 600 million people, occupying 24 billion m2 of building space in vast rural area [1]. Rural buildings have higher energy consumption in China due to irrational design Related research shows that poor building envelope is the main reason for the lower temperature of rural buildings in North China [1]. Rural homes on average are significantly less efficient than urban ones, both because of their design and because of their use of inefficient traditional biomass [2]. The research indicated the cold tolerance of the rural occupants is higher than urban occupants possible due to the poor thermal performance of rural housing [3]. It has been a long time that people paid attention to rural building energy efficiency, the development of this work is still slow due to drawbacks of planning and design and heat preservation effect [4]
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