Lilley Drew, Yu Peiyuan, Ma Jason, Jain Anubhav, Prasher Ravi
Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.
Department of Mechanical Engineering, University of California, Berkeley, CA 94720, USA.
iScience. 2021 Dec 7;25(1):103540. doi: 10.1016/j.isci.2021.103540. eCollection 2022 Jan 21.
Thermal fluids are used as heat transfer fluids and thermal energy storage media in many energy technologies ranging from solar thermal heating to battery thermal management. The heat capacity of state-of-the-art thermal fluids remains ∼50% of that of water (which suffers from a limited operation range between 0°C and 100°C), and their viscosities are typically more than one order of magnitude higher than that of water. Our results demonstrate that the heat capacity of the proposed thermochemical fluid is significantly higher than that of state-of-the-art thermal fluids over a broad temperature range and is also higher than that of water between 60°C and 90°C. The viscosity of our liquid is only 3 times higher than that of water, and the operating temperature range is between -90°C and 135°C. Furthermore, a model was developed allowing for novel design of thermochemical thermal fluids in the future with even higher heat capacity.
热流体在从太阳能热供暖到电池热管理等众多能源技术中用作传热流体和热能存储介质。现有热流体的热容仅为水的热容的约50%（水的运行温度范围在0°C至100°C之间有限），并且它们的粘度通常比水的粘度高一个多数量级。我们的结果表明，所提出的热化学流体的热容在很宽的温度范围内显著高于现有热流体的热容，并且在60°C至90°C之间也高于水的热容。我们这种液体的粘度仅比水高3倍，运行温度范围在-90°C至135°C之间。此外，还开发了一个模型，以便未来能够对热容更高的热化学热流体进行新颖设计。
