Abstract The solar trigeneration system based on coupling photovoltaic thermal (PVT) collectors with an absorption-subcooled compression hybrid cooling configuration has the potential for enhancing solar energy utilization in buildings. Considering time-of-use electricity pricing, the availability of solar cooling often does not coincide with on-peak periods during which electricity prices are high. To benefit from time-of-use pricing for greater economic profitability, sensible heat thermal storage is potential options. However, changeable storage tank temperature affects not only solar cooling capacity but also the electrical output of PVT collectors. Thus, in this work, three operation schemes (i.e., a conventional scheme, heat energy storage and cool energy storage schemes) are compared, and the effect of key design parameters on system performance is analyzed. Models for different system layouts and a conventional photovoltaic (PV-only) system are developed by programming with MATLAB. Annual (8760-hour) simulations are performed based on a case study for a high-rise hotel in subtropical cities. The results for Guangzhou show that the system layout, integrating cool energy storage and glazed PVT collectors with low-emissivity coatings, achieves the highest total electricity cost saving, which is 16% higher than that of the PV-only system. Its total solar energy utilization efficiency is 0.321, which is 2.4 times that of the PV-only system. The novelty of this work is that it provides an appropriate energy storage strategy and the design guidelines of key parameters for PVT-based solar trigeneration systems. This work is helpful for PVT-based solar trigeneration systems to improve operating cost savings under time-of-use electricity pricing.

中文翻译：

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分时电价下光伏集热器与热能存储一体化太阳能三联电系统评估与参数分析

摘要 基于耦合光伏热 (PVT) 集热器和吸收-过冷压缩混合冷却配置的太阳能三联产系统具有提高建筑物太阳能利用的潜力。考虑到分时电价，太阳能冷却的可用性通常与电价高的高峰时段不一致。为了从使用时间定价中受益以获得更大的经济盈利能力，显热蓄热是潜在的选择。然而，可变的储罐温度不仅会影响太阳能冷却能力，还会影响 PVT 集热器的电力输出。因此，在这项工作中，对三种运行方案（即常规方案、热能储存和冷能储存方案）进行了比较，并分析了关键设计参数对系统性能的影响。不同系统布局的模型和传统的光伏（仅光伏）系统是通过使用 MATLAB 编程开发的。年度（8760 小时）模拟是基于亚热带城市高层酒店的案例研究进行的。广州的结果表明，将冷能储存和带低辐射涂层的玻璃 PVT 集热器相结合的系统布局实现了最高的总电力成本节约，比纯光伏系统高 16%。其太阳能总利用效率为0.321，是纯光伏系统的2.4倍。这项工作的新颖之处在于它为基于 PVT 的太阳能三联电系统提供了适当的储能策略和关键参数的设计指南。