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Performance Analysis of a District Heating System
Faculty of Mechanical Engineering, University of Ljubljana, Ljubljana 1000, Slovenia
Institute for Energy Engineering, Technische Universität Berlin, Berlin 10587, Germany
* Author to whom correspondence should be addressed.
Received: 5 December 2012; in revised form: 15 January 2013 / Accepted: 20 February 2013 / Published: 4 March 2013
Abstract: Lowering the exergy content of heat required for heating purposes decreases the primary energy consumption. District heating systems are often an important link between facilities that generate heat with low exergy content and consumers. Exergetic efficiency of heat distribution is an important performance criterion in heat supply to consumers. It can serve as a criterion for optimization, towards a more sustainable distribution-network design and operation. This paper presents a methodology for an exergy-based distribution-network analysis in a district heating system. Criteria for performance evaluations are defined. They can be used to evaluate heat supply to different points in the network, or individual system components. A case study is performed on an existing district heating system. Energetic and exergetic efficiencies of supply lines are analyzed. Exergy destructions and exergy losses are studied. Large differences in efficiency of heat supply to different points in the network are discovered. Over-dimensioned parameters of the distribution network are investigated.
Keywords: district heating system; distribution network; energy; exergy; efficiency
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MDPI and ACS Style
Ljubenko, A.; Poredoš, A.; Morosuk, T.; Tsatsaronis, G. Performance Analysis of a District Heating System. Energies 2013, 6, 1298-1313.
Ljubenko A, Poredoš A, Morosuk T, Tsatsaronis G. Performance Analysis of a District Heating System. Energies. 2013; 6(3):1298-1313.
Ljubenko, Andrej; Poredoš, Alojz; Morosuk, Tatiana; Tsatsaronis, George. 2013. "Performance Analysis of a District Heating System." Energies 6, no. 3: 1298-1313.