*Article* **Developing and Testing the Air Cooling System of a Combined Climate Control Unit Used in Pig Farming**

**Ivan Ignatkin 1,\*, Sergey Kazantsev 1, Nikolay Shevkun 1, Dmitry Skorokhodov 1, Nikita Serov 1, Aleksei Alipichev <sup>1</sup> and Vladimir Panchenko <sup>2</sup>**


**Abstract:** This article presents the results of developing and testing the air-cooling system of a combined climate control unit used in pig farming. The authors have found a water-evaporative system to be the most efficient for cooling the air supply. Cooling systems of this type consume 0.003 kW/kW of electric power to produce 1 kW of cold. Based on the developed mathematical model for water-evaporative cooling in the combined climate control unit, the authors have determined that an air supply with a temperature of 31.2 ◦C and a relative humidity of 30.4% can be cooled by 8.3 ◦C when saturated with moisture to a relative humidity of 90.0% (by 11.7 ◦C at 100%). Experimental studies of the cooling system confirmed the theoretically obtained data.

**Keywords:** indoor climate; air cooling; water-evaporative systems; sprayed panels; heat recovery units
