The effect of the District Heating Return Temperature Reduction on Flue Gas Condenser Efficiency

Author:

Lepiksaar Kertu1,Volkova Anna1,Ruseljuk Pavel2,Siirde Andres1

Affiliation:

1. Tallinn University of Technology , Ehitajate tee 5, 19086 Tallinn , Estonia

2. AS Narva Soojusvõrk, Oru tn 2, 20203 Narva , Estonia

Abstract

Abstract The use of flue gas condensers proved to be effective in increasing boiler efficiency and achieving primary energy savings. The transition to the 4th generation district heating will lead to temperature reduction in district heating networks. The aim of this study is to determine the effects of the reduction in the district heating return temperature on flue gas condenser efficiency. Different DH return temperatures and fuel moisture contents were examined, and a calculation model was created. The results show that a reduction in district heating return temperature can lead to an increase in heat recovery through the flue gas condenser. Primary energy savings were estimated based on the amount of heat recovered.

Publisher

Walter de Gruyter GmbH

Subject

General Environmental Science,Renewable Energy, Sustainability and the Environment

Reference33 articles.

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2. [2] European Parliament Council of the European Union. Directive 2012/27/EU of the European Parliament and of the Council of 25 October 2012. Official journal of the European Union. https://doi:10.3000/19770677.L_2012.315.eng

3. [3] Volkova A., Mašatin V., Siirde A. Methodology for evaluating the transition process dynamics towards 4th generation district heating networks. Energy 2018:150:253–261. https://doi.org/10.1016/j.energy.2018.02.12310.1016/j.energy.2018.02.123

4. [4] Köfinger M., Basciotti D., Schmidt R. R. Reduction of return temperatures in urban district heating systems by the implementation of energy-cascades. Energy Procedia 2017:116:438-451. https://doi.org/10.1016/j.egypro.2017.05.09110.1016/j.egypro.2017.05.091

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