Potential for Low-Temperature Energy Usage at Power Plant’s Cold End in Order to Increase Energy Efficiency

Vladimir I. Mijakovski
University “St. Kliment Ohridski”, Faculty of Technical Sciences, Bitola, Macedonia

Nikola Mijakovski
xSoft engineering, Skopje, Macedonia

Ladda ner artikelhttp://dx.doi.org/10.3384/ecp110573255

Ingår i: World Renewable Energy Congress - Sweden; 8-13 May; 2011; Linköping; Sweden

Linköping Electronic Conference Proceedings 57:33, s. 3255-3261

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Publicerad: 2011-11-03

ISBN: 978-91-7393-070-3

ISSN: 1650-3686 (tryckt), 1650-3740 (online)


Thermal power plant (TPP) ’Bitola’ is the largest electricity producer in the Republic of Macedonia with installed capacity of 3x225 MW. It is a lignite fired power plant; in operation since 1982. Most of the installed equipment is of Russian (former Soviet) origin. Power plant’s cold end consists of a condenser; pump station and cooling tower. The power plant was built without considerations regarding energy efficiency and usage of waste heat energy.

A possibility to increase energy efficiency through low-temperature heat usage from the power plant’s cold end is shown in this work. The system includes connection of heat pump to the power plant’s cold end for heating of greenhouse (orangery) complex located close to power plant’s cooling towers. An analysis presenting economic feasibility of the concept for two different refrigerants used in the heat pump is also presented.

Comparison between separate production of heat energy in a boiler - house and combined – merged system consisting of three heat pumps working in parallel proves the applicability of the heat pumps concept in terms of increased energy efficiency and pay-back period of investment.


Power plant; Heat pump; Energy efficiency


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