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Influence of the net structure and operating strategy on the heat load of a district-heating network

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  • Andersson, Staffan

Abstract

A district-heating network acts like a heat-storage device. This means that the heat load at the district-heating plant is determined not soley by the substations' heat demand. In the model used, the flow demands and return temperatures of two-stage substations are calculated for ideal static conditions. The circulation time of the primary water is calculated from flows and pipe dimensions under ideal conditions, where heat losses are neglected. The results obtained shows that the commonly used strategy for the supply temperature (i.e. increasing with decreasing outdoor temperature) in combination with the net structure yields amplified variations of the heat load compared with the actual demands of the attached consumers. It is also shown that from a more appropriate choice of supply temperature, the variations of the heat load may be reduced.

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  • Andersson, Staffan, 1993. "Influence of the net structure and operating strategy on the heat load of a district-heating network," Applied Energy, Elsevier, vol. 46(2), pages 171-179.
    • Handle: RePEc:eee:appene:v:46:y:1993:i:2:p:171-179
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    Cited by:

    1. Jie, Pengfei & Tian, Zhe & Yuan, Shanshan & Zhu, Neng, 2012. "Modeling the dynamic characteristics of a district heating network," Energy, Elsevier, vol. 39(1), pages 126-134.
    2. Ping Li & Haixia Wang & Quan Lv & Weidong Li, 2017. "Combined Heat and Power Dispatch Considering Heat Storage of Both Buildings and Pipelines in District Heating System for Wind Power Integration," Energies, MDPI, vol. 10(7), pages 1-19, June.
    3. Yan, Aibin & Zhao, Jun & An, Qingsong & Zhao, Yulong & Li, Hailong & Huang, Yrjö Jun, 2013. "Hydraulic performance of a new district heating systems with distributed variable speed pumps," Applied Energy, Elsevier, vol. 112(C), pages 876-885.

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