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MEZGA, Z., ĆATIĆ, D.
CHP AS A POWER BACKUP FOR THE DISTRIBUTION MANAGEMENT CENTER AND AS AN EXAMPLE OF COST-EFFICIENT ENERGY MANAGEMENT AT THE OFFICE BUILDING OF ELEKTRO MARIBOR
KOMUNALNA ENERGETIKA / POWER ENGINERING, 8
The installation of combined heat and power (CHP) as a power backup for the users of Elektro Maribor’s Distribution Management Center (DMC) at the office building at Vetrinjska ulica 2 was the result of analyses of synergetic effects of two independent projects. The first project was the modernisation of the existing system of DMC uninterrupted power supply providing redundant backup power. The second project came about due to the requirements of an energy audit of the building. One of the priority investments was the renovation of the boiler room. Besides the replacement of the energy inefficient old boiler with a modern gas condensing boiler it was also proposed to install a small CHP gas unit. By combining these projects after drawing up an investment programme, we decided to renovate the boiler room and to implement CHP as a permanent source of heat and also as backup power supply for DMC. CHP can operate in isolated operation mode in emergencies which provides a continuous electricity supply for DMC. This kind of CHP operation has many benefits: it is a unit for the production of electricity for DMC, the total electricity consumption at the production location is lower, heat production during the operation of CHP is constant and there is a guaranteed state grant for production sources. This CHP operating model represents a technically and technologically advanced process in the company which also provides financial savings.

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