Experimental investigations to measure thermodynamic properties of MWCNT/MnCl_2 composite material for thermochemical energy storage system
参考中译:热化学储能系统MWTNT/MnCl_2复合材料热力学性质的实验研究


          

刊名：IJIDeM
作者：Siva Subrahmanyam Mendu（Department of Mechanical Engineering, MVGR College of Engineering (A)）
Anil Kumar Emadabathuni（Department of Mechanical Engineering, Indian Institute of Technology Tirupati）
AnilKumar Sannapareddy（Department of Mechanical Engineering, Indian Institute of Technology Tirupati）
Sarat Babu Kaki（Department of Mechanical Engineering, Indian Institute of Technology Tirupati）
刊号：710F0045/I
ISSN：1955-2513
出版年：2024
年卷期：2024, vol.18, no.6
页码：3713-3724
总页数：12
分类号：TH12
关键词：Thermochemical energy storage system；MWCNT；MnCl_2；Thermodynamic properties；Ammonia adsorption/desorption
参考中译：热化学储能系统; MWTNT; MnCl_2;热力学性质;氨吸收/脱附
语种：eng
文摘：Thermal energy is abundant in the form of solar energy and can be stored to meet the demands of many applications. There are many methods for storing thermal energy, but thermochemical energy storage devices are the most efficient among the available options. Materials and their properties must be explored to develop such systems. The focus of this research is to develop and test the thermodynamic properties of thermochemical composite materials based on the metal halide salts MnCl_2 and MWCNT during ammonia adsorption and desorption. During the initial development stage, the composite material was characterised using XRD and BET. Later, an experimental set-up was fabricated to measure pressure concentration isotherms during ammonia adsorption and desorption. In the final phase, the Von't Hoff equation is used to calculate the enthalpy and entropy of the reaction. The average adsorption enthalpy and entropy, according to the results, are 39.21 kJ/mol and 0.111 kJ/mol K, respectively. The average desorption enthalpy and entropy are 85.83 kJ/mol and 224 kJ/mol K. The maximum hysteresis between ammonia adsorption and desorption was determined to be 2.74. Finally, the energy storage density is calculated at different temperatures. These properties are important for designing a thermochemical energy storage system.
参考中译：热能以太阳能的形式丰富，可以储存起来，以满足许多应用的需求。储存热能的方法有很多，但热化学储能装置是可用选择中最有效的。为了开发这样的系统，必须探索材料及其性能。本研究的重点是开发和测试基于金属卤化物MnCl2和MWCNT的热化学复合材料在氨吸附和脱附过程中的热力学性质。在初始开发阶段，用X射线衍射仪和BET对复合材料进行了表征。随后，建立了一套实验装置来测量氨吸附和解吸过程中的压力浓度等温线。最后用Von‘t-Hoff方程计算了反应的焓和熵，得到的平均吸附热焓和平均吸附熵分别为39.21kJ/m ol和0.111 kJ/m ol K，平均脱附热和平均脱附熵分别为85.83kJ/m o l和224kJ/m ol K，氨吸附-脱附的最大滞后为2.74。最后，计算了不同温度下的储能密度。这些性质对热化学储能系统的设计具有重要意义。



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