基于负荷差的冷热电联产系统互联运行特性研究

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2025-06-18 DOI:10.1016/j.csite.2025.106509

Yaohong Li , Xiaoyang Bian , Bin Peng , Pengxiang Wang , Haolong Wang

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引用次数: 0

摘要

区域内两套冷热电联产系统可通过电网和热网连接，实现互联运行，利用负荷需求的时空互补性，显著提高区域能源系统的整体性能。本文首先建立了ICCHP系统的数学模型，并考虑了后续电负荷（FEL）、后续热负荷（FTL）和后续电-热混合负荷（FHL）三种运行策略。在传统分供（SP）系统的基础上，结合策略，计算了两个热电联产系统互联独立运行时的综合性能指标（CPI）。随后，提出了负载表征参数（负载沿时间轴移动的时间间隔），以进一步研究负载差对ICCHP系统性能的影响。结果表明：不同建筑用户联网运行模式下的热电联产系统性能优于独立运行模式，这主要是由于不同负荷需求和运行策略之间的能量互补特性所致。其中，两套热电联产系统均采用FTL策略运行时，三种互联场景下的CPI比单独运行时的CPI提升幅度最大，分别为9.14%、9.37%和5.02%。总的来说，当两个不同建筑用户的热电联产系统相互连接运行时，负载峰值和低谷持续时间差异的减少导致热电联产系统性能的降低。

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Research on interconnected operation characteristics of combined cooling heating and power system based on load difference

The two combined cooling, heating, and power (CCHP) systems in the region can be connected through the power and heat grids to realize interconnected operation, taking advantage of the spatial and temporal complementarity of load demand and significantly improving the overall performance of the regional energy system. In this paper, a mathematical model of the interconnected combined cooling, heating, and power (ICCHP) system is first constructed, and three operation strategies, namely following electric load (FEL), following thermal load (FTL), and following hybrid electric-heating load (FHL), are considered. The combined performance index (CPI) of the two CCHP systems under interconnected and independent operation is calculated based on the conventional split-supply (SP) system by combining the strategies. Subsequently, a load characterization parameter (the time interval at which the load is shifted along the time axis) is proposed to further investigate the effect of load difference on the performance of the ICCHP system. The results indicate that the system performance of CCHP systems with different building users in the interconnected mode of operation is improved compared to the independent mode of operation, which is mainly due to the energy complementary characteristics between different load demands and operation strategies. In particular, when both CCHP systems are operated with the FTL strategy, the CPI of the systems in the three interconnection scenarios improves the most compared to when they are operated independently, which are 9.14 %, 9.37 %, and 5.02 %, respectively. Overall, when CCHP systems for two different building users operate interconnected, the reduction in the difference in load peak and valley durations results in a reduction in ICCHP system performance.

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.