Monday, August 21st, 2017

Primary energy savings through thermal storage in district heating networks

Publication year: 2011brbSource:/b Energy, In Press, Corrected Proof, Available online 11 May 2011brVittorio, Verda , Francesco, ColellabrDistrict heating is an efficient way to provide heat to residential, tertiary and industrial users. Heat is often produced by CHP (combined heat and power) plants, usually designed to provide the base thermal load (40–50% of the maximum load) while the rest is provided by boilers. The use of storage tanks would permit to increase the annual operating hours of CHP: heat can be produced when the request is low (for instance during the night), stored and then used when the request is high. The use of boilers results partially reduced and the thermal load diagram is flattered. Depending on…br Highlights: ► A multi-scale model of storage tanks to be used in district heating systems is proposed. ► The analysis is conducted considering a real district heating system as case study. ► The impact of the storage system size on the fuel consumption and electricity production is obtained. ► The storage tank size corresponding to maximum primary energy savings and minimum total cost are obtained. ► Results show that significant reduction in primary energy consumption and annual costs can be achieved.

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