Effects of GAHE Application on Annual Changes in Microclimate Parameters in Equine Facilities

In this manuscript, an analysis of the prospect of using a direct-contact air, gravel, ground heat exchanger (GAHE)—patented and tested at the Wroclaw University of Science and Technology—as a simple and inexpensive way of improving microclimate parameters in horse stables using renewable energy was presented. Different options for introducing a GAHE into the typical HVAC system have been proposed and examined. Using the GAHE calculation model developed based on the research, computer simulations of the GAHE’s interaction with the ventilation system were conducted. The effects of GAHE interaction were compared with a typical solution that does not utilise ground renewable energy. The analyses demonstrate year-round changes in microclimate parameters, particularly in the air temperature, relative humidity, and the THI comfort index. The benefits of using a GAHE as a component that improves comfort for animals and employees, while simultaneously saving energy, were demonstrated. The use of measurement data and computer energy simulations demonstrates the engineering feasibility of including GAHEs in a mechanical ventilation system for a horse stable. The obtained results indicate the potential for improving animal husbandry and employee working conditions without the need to consume additional energy to operate complex HVAC systems.