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INCREASING PERFORMANCES OF A COMBINED HEAT AND POWER PLANT BY OPTIMAL TECHNOLOGY SELECTION AND OPERATION

Diana Tuţică

Abstract

The efficient use of cogeneration systems depends on both the heat demand variations and on the restrictions imposed by the related legislation. In this paper, in order to optimize the operating regimes of a Combined Heat and Power Plant, authors have determined the correlation between functioning modes of the plants? equipment and the possible solutions to satisfy with precision the consumers? heat demand. Often, optimizing only the operating regimes can be non-profitable, especially for the case of modern and performing equipment. In such cases a big deviation from the nominal operating mode, it is not worth but rather a search for trigenartion solutions. In the paper there was presented a possible options of using thermal potential of the tow reciprocating engines of UPB CHP, to generate cooling water, in order to supply a potential consumer. According to the calculations the first proposed solution is technically efficient, however the first case (UPB Campus) has some special characteristics being a University. The most important is the fact that the cooling is needed only 500 hours per year. In this regard there have been performed a technical-economic analysis of implementation of a power, heat and cold system, dedicated to supply a University Campus buildings. An important problem occurs in the case of special consumers, such as the analyzed University, where even the demand for cooling suffers huge variations. For this reason, the possibility to implement a trigeneration solution, in order to supply the necessary for cooling some spaces and a new food store that will be built into the campus, was analyzed. The performed technical-economic analysis shows that the proposed trigeneration solution leads to increasing the energy and economic efficiency of the plant, as well as having a positive impact upon the environment due to the reduction of fossil fuel consumption.

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DOI resolver: doi.org/10.5593/sgem2018/4.1/s17.054

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