Demand response strategy study of a radiant roof cooling system based on the thermal inertia of the building envelope

Yidan Guo, Xueying Xia, Zhaotai Wang, Yuhan Liu, Zhen Li
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Abstract

There is an imbalance between supply and demand in the power system. Implementing demand response control strategies for air-conditioning systems is beneficial to optimize the allocation of power resources. Here, we use two single strategies and a combination strategy for the radiant roof cooling system: passive energy storage, global temperature reset, and the passive energy storage-global temperature reset combination strategy to implement demand response control, all of which achieve peak load reduction or shifting by changing the indoor controlled parameters. Based on the thermal inertia of the building envelope, we utilize a TRNSYS model to analyze the performance of three demand response strategies of radiant roof cooling systems in terms of thermal comfort, energy consumption, operating costs, and peak load shifting rates. The findings reveal that implementing demand response strategies can reduce the operating energy consumption of radiant roof cooling systems and facilitate peak load shifting. Among them, the combined response strategy shows the best peak load transfer effect, with a transfer rate of 19.84% and a better operating economy. Meanwhile, we find that the outdoor temperature affects the implementation of demand response strategies for the radiant roof cooling system based on the thermal inertia of the building envelope. Practical application The study has significant application value in the following aspects: Implementing a demand response strategy for the radiant roof cooling system, based on the thermal inertia of the building envelope, can reduce operational energy consumption and achieve peak load shifting. This approach effectively addresses the issue of supply-demand imbalance in the power system. The application of the work could facilitate improved operational energy efficiency, contributing to emissions reduction goals and optimizing the use of intermittent renewable energy systems in power grids.
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基于建筑围护结构热惯性的屋顶辐射制冷系统需求响应策略研究
电力系统的供需不平衡。对空调系统实施需求响应控制策略有利于优化电力资源配置。本文采用被动式储能、全局温度复位和被动式储能-全局温度复位组合两种单一策略和组合策略实现需求响应控制,通过改变室内控制参数实现峰值负荷的降低或转移。基于建筑围护结构的热惯性,我们利用TRNSYS模型从热舒适、能耗、运行成本和峰值负荷转移率等方面分析了三种需求响应策略的屋顶辐射制冷系统的性能。研究结果表明,实施需求响应策略可以降低屋顶辐射冷却系统的运行能耗,促进峰值负荷转移。其中,联合响应策略调峰效果最佳,调峰率为19.84%,运行经济性较好。同时,我们发现室外温度会影响基于建筑围护结构热惯性的屋顶辐射冷却系统需求响应策略的实施。本研究在以下几个方面具有重要的应用价值:基于建筑围护结构的热惯性,对屋顶辐射制冷系统实施需求响应策略,可以降低运行能耗,实现负荷调峰。这种方法有效地解决了电力系统的供需不平衡问题。这项工作的应用可以促进提高运营能源效率,有助于实现减排目标,并优化电网中间歇性可再生能源系统的使用。
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