A thermochemical energy storage based cooling and heating system: Modelling, experimental validation and lab-scale demonstration
A thermochemical energy storage based cooling and heating system: Modelling, experimental validation and lab-scale demonstration
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DOI：
10.1016/j.enconman.2021.114748
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发表时间：
2021-11
影响因子：
10.4
通讯作者：
A. Ahmad;Yulong Ding
中科院分区：
文献类型：
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作者：
A. Ahmad;Yulong Ding
热能（热能和冷能）占全球最终能源消耗的50%以上，并且还将继续增加，而制冷在世界许多地方占当地电力高峰需求的50%。因此，需要开发高效的冷却和加热系统，不仅可以降低功耗，还可以将负载转移到非高峰时间，提供更好的网络稳定性，并以可承受的成本减少二氧化碳排放。这项工作提出了一种基于热化学能量存储的系统，用于提供冷却和加热。该系统利用空气水合/脱水和蒸发冷却概念来产生冷却和加热，并且可以级联以提供宽范围的出口温度以满足不同的应用。使用 MATLAB 模型对所提出系统的单效应和双效应进行了数值研究，并在实验室条件下进行了实验测试。建模结果表明，系统级性能系数（COP）取决于入口温度、相对湿度和放电过程中回收的能量。在入口相对湿度为 45% 时，当入口温度从 37 °C 降低至 29 °C 时，系统 COP 从 1.8 增加至 4.4。实验结果表明，单级和双级配置可分别实现出口温度10-12℃和5℃、入口温度30℃，分别降低18-20℃和25℃。这些结果与 MATLAB 建模的结果一致，误差范围为 1–3 °C。
Thermal (heat and cold) energy accounts for over 50% of global final energy consumption and is set to increase, and cooling contributes to 50% of the local electricity peak demands in many places of the world. Therefore, there is a need to develop efficient cooling and heating systems that not only can reduce the power consumption but also shift load to off peak times, offer a better network stability and reducing CO2emissions at an affordable cost. This work present a thermochemical energy storage based system for cooling and heating provision. The system uses air hydration/dehydration with evaporation cooling concept to generate both cooling and heating, and it can be cascaded to give a wide range of outlet temperature to meet different applications. A single effect and a double effect of the proposed system were numerically investigated using a MATLAB model and experimentally tested under the lab conditions. The modelling results showed that the system level coefficient of performance (COP) depends on the inlet temperature, relative humidity and the recovered energy from the discharging process. At an inlet relative humidity of 45%, the system COP increased from 1.8 to 4.4 when the inlet temperature reduced from 37 °C to 29 °C. The experimental results showed that an outlet temperature of 10–12 °C and 5 °C with an inlet temperature of 30 °C can be obtained, respectively, meaning a temperature reduction respectively by 18–20 °C and 25 °C with the single-stage and double-stage configurations. These results agreed with the MATLAB modelling within 1–3 °C.