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Assessing Indoor Climate Control in a Water-Pad System for Small-Scale Agriculture in Taiwan: A CFD Study on Fan
Jia-Kun Chen1, Yung-Ling Sun1, Chia-Chi Hsu1
1Institute of Environmental and Occupational Health Sciences, College of Public Health, National Taiwan University, No. 17, Xu-Zhou Road, Taipei 100, Taiwan.
Managing heat stress in layer hens is crucial for egg production. The ALPS system and fan models effectively improved hen health and productivity by controlling the microclimate, reducing death rates and increasing egg output.
Area of Science:
- Animal Science
- Agricultural Engineering
- Environmental Science
Background:
- Heat stress significantly impacts layer hen physiology, leading to decreased egg production and quality.
- Effective microclimate management is essential for mitigating heat stress in poultry houses.
- Previous studies highlight the need for optimized environmental control systems in commercial layer operations.
Purpose of the Study:
- To evaluate the impact of different management systems on the microclimate of laying hen houses.
- To assess the effectiveness of heat stress mitigation strategies on hen productivity and health.
- To develop and validate a simplified hen model for indoor microclimate design.
Main Methods:
- Comparative analysis of traditional, ALPS, and water-pad layer house systems.
- Utilization of a simplified hen model to design and analyze indoor microclimates.
- Implementation and evaluation of fan models for temperature reduction.
- Monitoring of daily death rates and daily production rates.
Main Results:
- The ALPS system improved productivity and decreased death rates in both traditional and water-pad systems.
- Water-pad systems showed a significant increase in daily production rate (21.3%).
- Fan models effectively lowered average house temperatures, reducing heat stress impacts.
- A simplified hen model demonstrated an average difference of 4.4% in microclimate prediction.
Conclusions:
- Controlling inlet air humidity is critical for regulating temperature and mitigating heat stress.
- Fan models and optimized microclimate management systems (like ALPS) enhance hen health and egg production.
- Model 3 presents an energy-saving, intelligent solution for small-scale agricultural environments, particularly in subtropical regions.
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