Efficiency of decentralized heat supply based on traditional heat generators with vapour-compression conversion of energy from low-temperature sources
2024
Petrash, Vitaly | Baryshev, Vitaly | Shevchenko, Leonid | Geraskina, Elina
The research is devoted to the solution of the actual problem of increasing the efficiency of combined systems of decentralised heat supply of public buildings and industrial enterprises with characteristic heat generators on the basis of heat-pump energy conversion of preliminary cooling of heat flows of the used heat carrier from the heat network, initial cold water and exhaust gases. The aim of the work was development, analysis and identification of conditions to improve the energy efficiency of the proposed combined system which provides increased generation capacity for decentralised heat supply. The proposed approach allowed solving the problem of improving energy and environmental performance in a two-stage scheme of heat generators with the regulation of the temperature of the used heat carrier to a rational value using the heat pump technology, consistent with the standard temperature schedule. The most important result of the analytical study of the combined decentralised heat supply system is the established generalised dependence for determining the actual conversion factor in the heat pump operation. It makes it possible to qualitatively analyse the dependence of the energy efficiency of the heat supply system on temperature changes of characteristic low-potential sources, the ratio of water flows and their distribution for municipal, domestic and industrial-technological needs. The results of the analytical study of the improved heat supply system create a basis for its development taking into account the characteristic conditions of decentralised heat supply and operating modes of municipal and industrial-technological enterprises.
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出版者 Latvia University of Life Sciences and Technologies