Practical Methods for Efficient Estimation of Effective Thermal Resistance of Exterior Walls

有效估算外墙有效热阻的实用方法

• 批准号: 566879-2021
• 负责人: Chen, YuxiangY
• 金额: $ 4.63万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=748895
• 关键词: Practical; Methods; Efficient; Estimation; Effective

Studies have shown that the residential sector is responsible for about 18% of Canada's energy consumption, nearly 60% of which is attributed to space heating. The space heating energy consumption of homes places heavy burdens on users in terms of energy costs, on the energy infrastructure in terms of high peak demand, and on the environment in terms of GHG emissions due to the burning of fossil fuel. These matters have led to a focus on improving the energy efficiency of Canadian dwellings. Improving the thermal performance of exterior walls can help reduce the energy consumption of buildings. To achieve this goal, designers require explicit guidelines and simple methods to predict walls' effective thermal resistance (R-value) in different configurations. Currently, the options to calculate the R-values of masonry walls consist of overly simplifiedassumptions that often lead to inaccurate results, or expensive and time-consuming numerical modeling. The proposed project focuses on developing simple yet accurate models to estimate the effective thermal resistance of different wall systems, using analytical and statistical approaches. The ultimate goal of the project is to develop innovative tools (e.g., calculation methods and their online user interfaces) and provide intuitive guidelines (e.g., design charts) that are universal, easy to use, and cost-free for the building industry. These outputs will improve the energy and material efficiencies of building envelopes, increase productivity and lower costs in building design, and enhance the business and technical competency of the Canadian building industry. The project outcomes consist of economic diversification and technological development in the building construction sector. From the environmental perspective, these methods and tools will reduce the embodied energy and greenhouse gas emissions of Canadian buildings.

研究表明，住宅部门约占加拿大能源消耗的18%，其中近60%归因于空间供暖。家庭的空间加热能量消耗在能量成本方面给用户带来了沉重的负担，在高峰需求方面给能源基础设施带来了沉重的负担，并且在由于燃烧化石燃料而产生的GHG排放方面给环境带来了沉重的负担。这些问题导致了对提高加拿大住宅能源效率的重视。提高外墙的热工性能有助于降低建筑物的能耗。为了实现这一目标，设计人员需要明确的指导方针和简单的方法来预测不同配置中的墙壁的有效热阻（R值）。目前，计算砌体墙的R值的选项包括过度简化的假设，通常会导致不准确的结果，或昂贵和耗时的数值建模。拟议项目的重点是开发简单而准确的模型，以估计不同的墙壁系统的有效热阻，使用分析和统计方法。该项目的最终目标是开发创新工具（例如，计算方法及其在线用户界面）并提供直观的指导（例如，设计图表），这些图表对于建筑行业来说是通用的、易于使用的并且是免费的。这些产出将提高建筑围护结构的能源和材料效率，提高生产力，降低建筑设计成本，并提高加拿大建筑业的业务和技术能力。项目成果包括经济多样化和建筑部门的技术发展。从环境的角度来看，这些方法和工具将减少加拿大建筑物的隐含能源和温室气体排放。