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Thermochemical energy storage for cabin heating in battery powered electric vehicles

Wilks, Megan; Wang, Chenjue; Ling-Chin, Janie; Wang, Xiaolin; Bao, Huashan

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Megan Wilks

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Chenjue Wang
PGR Student Master of Philosophy

Xiaolin Wang


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.


Wilks, M., Wang, C., Ling-Chin, J., Wang, X., & Bao, H. (2023). Thermochemical energy storage for cabin heating in battery powered electric vehicles. Energy Conversion and Management, 291, Article 117325.

Journal Article Type Article
Acceptance Date Jun 18, 2023
Online Publication Date Jun 28, 2023
Publication Date 2023-09
Deposit Date Sep 4, 2023
Publicly Available Date Sep 4, 2023
Journal Energy Conversion and Management
Print ISSN 0196-8904
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 291
Article Number 117325
Keywords Energy Engineering and Power Technology; Fuel Technology; Nuclear Energy and Engineering; Renewable Energy, Sustainability and the Environment
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