ASSESSMENT OF ENERGY AUDIT EFFICIENCY IN THE HEAT SUPPLY SYSTEM OF THE EDUCATIONAL BUILDING NO. 1 (SAMARA STATE TECHNICAL UNIVERSITY)
The paper presents the results of the energy audit of the educational building No. 1 of Samara State Technical University (SamSTU). A generalized method for calculating heat losses based on heat transfer formulas is presented, as well as a method for studying a single-pipe heating system. The results of calculating heat losses through building enclosing structures (walls, windows, coverings, floors) are presented. For each classroom on floors 1-4, the required power of heating devices was calculated and the power of currently installed heating devices was estimated in terms of the required and consumed energy. It is established that the amount of heat consumed is 10…20 % higher than the calculated amount. We issued the recommendations for adjusting the power of heating devices in order to bring it to the calculated levels, which allowed reducing heat consumption up to 20 %. Also, studies of the attic space and mains of heating system were conducted, and it was found that the efficiency of thermal insulation of the mains is lower than acceptable. We made calculations required to select the optimal insulation thickness for each pipeline diameter, which saved another 4 % of the total heat loss. As a result of the energy audit, other recommendations were made to improve the single-pipe heating system.