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Greywater as an undervalued tool for energy efficiency enhancement and decarbonizing the construction sector: A case study of a dormitory in Poland
Energy and Buildings ( IF 6.6 ) Pub Date : 2025-01-20 , DOI: 10.1016/j.enbuild.2025.115337
Agnieszka Stec, Beata Piotrowska, Daniel Słyś
Energy and Buildings ( IF 6.6 ) Pub Date : 2025-01-20 , DOI: 10.1016/j.enbuild.2025.115337
Agnieszka Stec, Beata Piotrowska, Daniel Słyś
In light of accelerating climate change driven by greenhouse gas emissions, there is an urgent need to develop modern zero- and low-emission construction methods that promote energy and water efficiency. This article presents a comprehensive analysis of waste energy recovery systems and greywater utilization in collective housing, specifically within a dormitory setting. The proposed variants were assessed from the perspectives of both investors and users, as well as in terms of environmental impact. Life Cycle Cost analysis tools and emission indicators for CO2 , SO2 , NOx , CO, and particulate matter were used to evaluate the options. Additionally, the research included a survey of user preferences regarding sanitary fixtures and laboratory testing of a vertical heat exchanger’s energy efficiency. The study was conducted in a student dormitory located on the Rzeszów University of Technology campus. The feasibility of implementing a Drain Water Heat Recovery System (DWHRS) and a Greywater Recycling System (GWRS) was analyzed in comparison with conventional installation methods. Results indicate the financial and environmental viability of incorporating vertical heat exchangers for waste heat recovery from greywater. Conversely, analyses did not confirm the financial profitability of the GWRS, despite its large user base in the facility. Nonetheless, the use of a GWRS offers environmental benefits compared to conventional solutions in dormitory installations. These findings are valuable not only for system designers and manufacturers but may also guide policy changes and global trends. Importantly, the results highlight the need for institutional financial support to facilitate the broader adoption of such systems.
中文翻译:
灰水作为提高能源效率和建筑业脱碳的被低估工具:波兰宿舍案例研究
鉴于温室气体排放导致气候变化加速,迫切需要开发现代零排放和低排放施工方法,以提高能源和水效率。本文对集体住房中的废能回收系统和灰水利用进行了全面分析,特别是在宿舍环境中。从投资者和用户的角度以及环境影响的角度评估了拟议的变体。生命周期成本分析工具和 CO2、SO2、NOx、CO 和颗粒物的排放指标用于评估选项。此外,该研究还包括对用户对卫生洁具偏好的调查和立式换热器能源效率的实验室测试。该研究是在位于 Rzeszów University of Technology 校园的学生宿舍进行的。与传统安装方法相比,分析了实施废水热回收系统 (DWHRS) 和灰水回收系统 (GWRS) 的可行性。结果表明,采用立式换热器从灰水中回收余热具有财务和环境可行性。相反,尽管 GWRS 在该设施中拥有庞大的用户群,但分析并未证实其财务盈利能力。尽管如此,与宿舍设施中的传统解决方案相比,使用 GWRS 具有环境效益。这些发现不仅对系统设计人员和制造商有价值,而且可能指导政策变化和全球趋势。重要的是,研究结果突出表明需要机构财政支持,以促进此类系统的更广泛采用。
更新日期:2025-01-20
中文翻译:
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灰水作为提高能源效率和建筑业脱碳的被低估工具:波兰宿舍案例研究
鉴于温室气体排放导致气候变化加速,迫切需要开发现代零排放和低排放施工方法,以提高能源和水效率。本文对集体住房中的废能回收系统和灰水利用进行了全面分析,特别是在宿舍环境中。从投资者和用户的角度以及环境影响的角度评估了拟议的变体。生命周期成本分析工具和 CO2、SO2、NOx、CO 和颗粒物的排放指标用于评估选项。此外,该研究还包括对用户对卫生洁具偏好的调查和立式换热器能源效率的实验室测试。该研究是在位于 Rzeszów University of Technology 校园的学生宿舍进行的。与传统安装方法相比,分析了实施废水热回收系统 (DWHRS) 和灰水回收系统 (GWRS) 的可行性。结果表明,采用立式换热器从灰水中回收余热具有财务和环境可行性。相反,尽管 GWRS 在该设施中拥有庞大的用户群,但分析并未证实其财务盈利能力。尽管如此,与宿舍设施中的传统解决方案相比,使用 GWRS 具有环境效益。这些发现不仅对系统设计人员和制造商有价值,而且可能指导政策变化和全球趋势。重要的是,研究结果突出表明需要机构财政支持,以促进此类系统的更广泛采用。