Decarbonizing Agricultural Buildings: A Life-Cycle Carbon Emissions Assessment of Dairy Barns

文献类型： 外文期刊

第一作者： Liu, Hui

作者： Liu, Hui;Wang, Zhen;Qi, Fei;Wang, Chaoyuan;Shi, Zhengxiang;Liu, Hui;Wang, Zhen;Qi, Fei;Wang, Chaoyuan;Shi, Zhengxiang;Du, Xinyi;Du, Xinyi

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关键词： sustainable agricultural buildings; dairy barns; life cycle assessment; low-carbon transition

期刊名称：AGRICULTURE-BASEL （ 影响因子：3.6； 五年影响因子：3.8 ）

ISSN：

年卷期： 2025 年 15 卷 15 期

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收录情况： SCI

摘要： The life-cycle carbon emissions (LCCE) assessment of dairy barns is crucial for identifying low-carbon transition pathways and promoting the sustainable development of the dairy industry. We applied a life cycle assessment approach integrated with building information modeling and EnergyPlus to establish a full life cycle inventory of the material quantities and energy consumption for dairy barns. The LCCE was quantified from the production to end-of-life stages using the carbon equivalent of dairy barns (CEDB) as the functional unit, expressed in kg CO2e head-1 year-1. A carbon emission assessment model was developed based on the "building-process-energy" framework. The LCCE of the open barn and the lower profile cross-ventilated (LPCV) barn were 152 kg CO2e head-1 year-1 and 229 kg CO2e head-1 year-1, respectively. Operational carbon emissions (OCE) accounted for the largest share of LCCE, contributing 57% and 74%, respectively. For embodied carbon emissions (ECE), the production of building materials dominated, representing 91% and 87% of the ECE, respectively. Regarding carbon mitigation strategies, the use of extruded polystyrene boards reduced carbon emissions by 45.67% compared with stone wool boards and by 36% compared with polyurethane boards. Employing a manure pit emptying system reduced carbon emissions by 76% and 74% compared to manure scraping systems. Additionally, the adoption of clean electricity resulted in a 33% reduction in OCE, leading to an overall LCCE reduction of 22% for the open barn and 26% for the LPCV barn. This study introduces the CEDB to evaluate low-carbon design strategies for dairy barns, integrating building layout, ventilation systems, and energy sources in a unified assessment approach, providing valuable insights for the low-carbon transition of agricultural buildings.

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