Operating Parameters of the District Heating Substation Cooperating With the Installation of Technological Air Conditioning With High Efficiency of Heat Recovery

The article analyses the problem of determining the operating parameters of the district heating substation cooperating with the air heating system in technological air conditioning systems equipped with heat exchangers with high efficiency of heat recovery. Attention was paid to the correct selection of heat exchangers for the heat output balance depending on the heat recovery protection algorithms against a drop in the temperature of the heat transfer surface below 0 °C. Critical parameters were determined in Polish climatic conditions, at which the operation of the heat recovery exchanger in the air conditioning system is switched off or limited. It has been proven that the proper functioning of the district heating substation cooperating with the installation of air conditioning with high heat recovery efficiency requires the use of two heat exchangers with different characteristics, equipped with properly selected temperature control systems. The optimal model of cooperation between the technological air conditioning system and the heating substation was also indicated.