Abstract
This paper describes the analysis of the possibility of use of the direct-contact air, gravel, ground heat exchanger (acronym GAHE), patented at the Wroclaw University of Science and Technology, as a means of improving microclimate parameters in dairy cows’ barns. Different possibilities of introducing GAHE to the standard mechanical ventilation system of cowsheds have been proposed and investigated. Based on literature data, the required air parameters in the barns of dairy cows were determined and discussed. Computer simulations were carried out and the results obtained were compared to the baseline model. Year-round changes in microclimate parameters, especially air temperature, relative humidity, and THI index were investigated. The benefits of GAHE use were indicated. The possible increase in the minimum air volume of ventilation during the winter season and the decrease in the maximum values of this parameter in the summer were presented. Indications were made of the systems where the application of GAHE could be the most beneficial. A further research path has been proposed.
Highlights
This paper presents an analysis of the Ground Heat Exchanger (GAHE):
The quality and quantity of ventilation air supplied to the animal residence zone have a significant impact on the microclimate conditions established inside
The regulation is usually limited to switching the ventilation air stream between the summer and winter volume
Summary
Agriculture is one of the three main sectors of the national economy (outside industry and services), for which the overriding goal is the production of food. Agricultural production is divided into the cultivation of plants and animals. Among others, cereal, vegetable, and fruit grains. We have mainly meat, in addition dairy products, fats, milk, skins, and others. There is a need to look for solutions that can significantly improve production without a negative impact on the environment
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