Performance study of ultra-low temperature district heating system based on double-loop booster heat pump control strategy

IF 6.1 2区工程技术 Q2 ENERGY & FUELS Applied Thermal Engineering Pub Date : 2025-02-27 DOI:10.1016/j.applthermaleng.2025.126084

Yuexuan Gong, Guoyuan Ma, Yu Song, Lei Wang, Junrui Nie, Lu Wang

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Abstract

In recent years, the ultra-low-temperature district heating (ULTDH) systems has been developed to further reduce the heat loss in the district heating network. In this paper, on the basis of the ULTDH system, a double-loop booster heat pump (DLBHP) system used for terminal heating is proposed to improve the uniformity of temperature difference and heat transfer efficiency. The building heat load in Beijing was simulated using DEST software, and then the heating simulation model of the DLBHP was established through the TRNSYS software simulation platform. By changing the various control strategies on the heat source side and the heat sink side, the optimization of the operation and control strategies and the system performance were analyzed. The simulation results indicate that compared with the traditional operation modes, the system average COP with optimized control strategy can be increased by up to 9.24 %, and the power saving during the heating season can be up to 1389 kW·h. It can satisfy the real-time heat load demand of users, and has a large energy-saving potential as well as a broad market application prospect.

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来源期刊

Applied Thermal Engineering 工程技术-工程：机械

CiteScore

11.30

自引率

15.60%

发文量

1474

审稿时长

57 days

期刊介绍： Applied Thermal Engineering disseminates novel research related to the design, development and demonstration of components, devices, equipment, technologies and systems involving thermal processes for the production, storage, utilization and conservation of energy, with a focus on engineering application. The journal publishes high-quality and high-impact Original Research Articles, Review Articles, Short Communications and Letters to the Editor on cutting-edge innovations in research, and recent advances or issues of interest to the thermal engineering community.