Thermochemical energy storage for cabin heating in battery powered electric vehicles
Thermochemical energy storage for cabin heating in battery powered electric vehicles
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DOI：
10.1016/j.enconman.2023.117325
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发表时间：
2023-09
影响因子：
10.4
通讯作者：
M. Wilks;Chenjue Wang;J. Ling-Chin;Xiaolin Wang;Huashan Bao
中科院分区：
文献类型：
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作者：
M. Wilks;Chenjue Wang;J. Ling-Chin;Xiaolin Wang;Huashan Bao
探讨了热化学吸附蓄热技术用于纯电动汽车（EV）车室加热的潜力。以SrCl 2-NH3为工作对，设计了一种新型多吸附单元模块反应器。建立了所提出的系统的数值模型，并确定了系统的大小，以满足环境温度在−5-10 °C范围内持续1小时的加热要求。仿真结果表明，该系统可以满足所需的送风温度，通过初始激活6个吸附单元，并激活新的单元，一旦检测到低于所需的空气温度。结果表明，吸附反应的最终总转化率为0.62-0.67，表明在环境温度下系统性能相对稳定。为了在5 °C的环境温度下提供1.3 kW的加热功率1 h，所设计的储存系统在12个吸附单元中具有16.37 kg的吸附剂质量。对于较低的环境温度，需要更多的吸附装置，例如需要23个吸附装置来在−5 °C的环境条件下提供2.4千瓦的加热功率。发现整个系统能量密度为73.8kWh/m3，而材料能量密度为169.4kWh/m3。这项工作还表明了在评估吸附系统的性能时考虑吸附动力学的重要性，并证明了模块化设计的吸附反应器用于机舱加热的好处。
The potential of thermochemical adsorption heat storage technology for battery electric vehicle (EV) cabin heating was explored in this study. A novel modular reactor with multiple adsorption units was designed with working pair SrCl2-NH3. Numerical models of the proposed system were built, and the system was sized to meet the heating requirement for ambient temperatures ranging from −5–10 °C for 1 ∼ 2 h. The simulation results showed the system can satisfy the required supply air temperature by initially activating 6 adsorption units and activating new units once detecting lower air temperature than required. It was found that the final global conversion of adsorption reaction was 0.62–0.67, indicating a relatively stable system performance over ambient temperatures. To supply a heating power of 1.3 kW for 1 h at an ambient temperature of 5 °C, the designed storage system had an adsorbent mass of 16.37 kg in 12 adsorption units. More adsorption units were needed for lower ambient temperatures, such as 23 adsorption units needed to supply a heating power of 2.4 kW at −5 °C ambient condition. It was found that the overall system energy density was 73.8 kWh/m3, whereas the material energy density was 169.4 kWh/m3. This work also demonstrates the importance of considering adsorption dynamics when assessing the performance of an adsorption system and demonstrates the benefits of a modularly designed adsorption reactor for cabin heating.