Architectural design to mitigate indoor heat stress in a dairy cattle house under a heatwave event

Luo, Z. ORCID: https://orcid.org/0000-0002-2082-3958 and Cao, Y. 2023. Architectural design to mitigate indoor heat stress in a dairy cattle house under a heatwave event. Animal - science proceedings 14 (2) , pp. 317-318. 10.1016/j.anscip.2023.01.426

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Abstract

Application The architectural design of the livestock buildings and their day-to-day operation have a profound influence on the indoor heat stress of animals, but this is much under-researched. This study employed state-of-the-art building thermal modelling tool to assess the impacts of different architectural design strategies on mitigating the indoor heat stress risk and identify the most effective design interventions. Introduction Dairy cattle are susceptible to temperature changes, especially the rapid rise of temperature or long periods of extreme heat. Therefore, strategies to alleviate the heat stress of dairy cattle during heatwave becomes a crucial issue in dairy cattle industry for the good welfare of the cattle. The objectives of the study are: 1) to understand the indoor heat stress in a dairy cattle house during a heatwave event in the UK; 2) to assess the impact of different building design interventions to reduce overheating risk in such dairy cattle house. Materials and methods Indoor heat stress measurement (THI) has been conducted during the heatwave period of 2018 in both barn and milking areas. Building thermal modelling has been carried out to assess the impacts of different architectural design interventions on the overheating risk in both regions in the cattle house, after the model is validated using the measurement data. Results Our measurement results found both barn and milking parlour were overheated during the heatwave event and milking parlour was overheated for more than 90% of the time (with THI higher than 68). We also compared three types of architectural design mitigation strategies, i.e., white roof, natural ventilation and exhaust fan. The white roof could reduce the indoor temperature maxima by 4K and overheating degree hours by 11%, but all the mitigation strategies combined could reduce overheating risk by 89%, therefore significantly improve the welfare of the dairy cattle. Conclusions Architectural design could reduce indoor overheating risk in dairy cattle house and therefore improve the welfare of the dairy cattle during heatwave period.

Item Type:	Article
Date Type:	Published Online
Status:	Published
Schools:	Engineering
ISSN:	2772-283X
Last Modified:	23 Jun 2023 13:45
URI:	https://orca.cardiff.ac.uk/id/eprint/160531

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