Doublet in Kocani for Increasing the Annual Heat Supply Capacity

Abstract

Completion of the first (partial) reinjection of waste geothermal water back to the aquifer in year 2000 proved the need of installation of full reinjection in Kocani district heating system. By returning back of only 25% of the total flow of the water, stopping of water level decrease have been reached, i.e. balance of the use of 1,350,000 m3/year with the average natural recovering capacity of the aquifer. According to the measurements and calculations made, full collection of the waste water from the greenhouse ?Mosa Pijade? heating should increase the capacity of the system to 1,700,000 m3/year, and collection of whole waste water to 2,000,000 m3/year. With support of the Austrian Development Cooperation (ADC), the project for realization of the collection of waste water from one of the greenhouses complexes heating system and introduction of indirect connection of heat users to geothermal system is under realization. Related geological, technological, technical and economic aspects of the project are discussed in the paper.