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Analysis of energy-matching performance and suitable users of conventional CCHP systems coupled with different energy storage systems

机译：分析传统CCHP系统与不同储能系统配合使用时的能量匹配性能和合适的用户

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摘要

An energy storage system is deemed to be an effective way to improve the energy mismatch between the provision of systems and users' demands for combined cooling, heating, and power systems (CCHP). Hence, instead of the case study, dimensionless energy-matching parameters, energy-matching map, and nine universal energy-matching scenarios are proposed to measure the loads disparity between users' demands and the provision of CCHP system when coupled with thermal energy storage system, electric energy storage system, or the hybrid energy storage system, respectively. Then based on the energy-matching relations, the capacity sizing method and suitable user scopes are discussed to find the suitable energy storage system for CCHP systems in different energy-matching scenarios. The results indicate that if the system coupling with electric or thermal energy storage system, the capacity of the CCHP system can be installed in users' average electric or thermal energy demand, however, if the system coupling the hybrid energy storage system, the installed capacity can be summarized into two different situations based on the energy-matching relations. Meanwhile, thermal energy storage system is found to be more applicable when the heating load is dominant and greater energy saving would be achieved when the surplus electricity can be sold back to the Gird. Compared to the conventional CCHP systems, the systems in hot climate zones showed significant performance improvements than in cold climate zone when coupled with energy storage systems. Moreover, suitable users' boundaries in winter or cold climate zones are found to be larger than that in summer or hot climate zones, and a larger installed capacity will contribute to a wider suitable user scope. Finally, a sensitivity analysis is conducted to reveal the influence rules of the key parameters.
机译：储能系统被认为是改善系统供应与用户对制冷，供暖和动力系统（CCHP）组合的需求之间的能量失配的有效方法。因此，代替案例研究，提出了无量纲的能量匹配参数，能量匹配图和九种通用能量匹配方案，以测量与热能存储系统结合使用时用户需求与CCHP系统提供之间的负载差异，电能存储系统或混合能源存储系统。然后，根据能量匹配关系，讨论了容量确定方法和合适的用户范围，以找到适合不同能量匹配场景的CCHP系统合适的能量存储系统。结果表明，如果系统与电能或热能存储系统耦合，则可以按用户的平均电能或热能需求安装CCHP系统的容量，但是，如果系统与混合储能系统耦合，则安装容量根据能量匹配关系可以概括为两种不同的情况。同时，发现当热负荷占主导地位时，热能存储系统更适用，并且当多余的电能可以卖回电网时，可以节省更多的能源。与传统的CCHP系统相比，与蓄冷系统结合使用时，炎热气候区的系统比寒冷气候区的系统性能显着提高。此外，发现冬季或寒冷气候区的合适用户边界要大于夏季或炎热气候区的用户边界，更大的装机容量将有助于扩大合适的用户范围。最后，进行敏感性分析以揭示关键参数的影响规律。

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