International Journal on Advanced Science, Engineering and Information Technology, Vol. 8 (2018) No. 1, pages: 219-226, DOI:10.18517/ijaseit.8.1.3246

Modelling of Direct Connection of Heat Consumers to District Heating with Ejectors

Xhevat Berisha, Drilon Meha

Abstract

Energy requirements by thermal consumers are continually increasing as a result of the growing standards of living conditions. Thus, to meet the demands with thermal energy, and to use thermal energy more efficiently it was seen a reason to do the following analysis with the purpose of finding the influence of the most efficient distribution of thermal energy for the district heating of Pristina city. The current paper describes the operation of the ejectors applied for direct connection by mixing the hot water from district heating network with the cold water used for heating systems. This paper is, based on the simulations analysis of the water supply temperatures at the secondary network tws2, which are, derived from the modelling of ejector compared with water supply temperatures, which uses the enterprise of "Termokos" with heat exchangers. Furthermore, the results gained by CFD modelling have shown considerable thermal energy savings potentials and will be useful for the maintained engineer of district heating of Pristina City to make a suitable prediction of the design specifications to use thermal energy more efficiently.

Keywords:

ejector; heat exchanger; thermal substation; district heating; temperature distribution; CFD modelling; efficiency

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