In this paper, the performance of a thermochemical battery based on magnesium chloride and ammonia pair with a constant mass flow rate of ammonia gas is studied through a series of experiments using single and multicell configurations. It is shown that a lower mass flow rate lowers the temperature of the reactive complex and increases the duration of the absorption process. However, it was observed that the reaction eventually becomes mass transfer limited which slows the absorption rate to values below those specified by the mass flow controller (MFC). It was shown in the single-cell reactor that a reaction zone starts at the inlet and moves toward the end of the reactor. The mass transfer limited reaction zone movement reduces the absorption rate and temperature in the reaction zone. The overall performance of a multicell thermal battery is also studied to analyze behavior of such reactors as well. It was shown that the controlling the flow rate of ammonia can cause the cells to deviate in absorption rate.
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June 2019
Research-Article
Absorption Process in MgCl2–NH3 Thermochemical Batteries With Constant Mass Flow Rate
Seyyed Ali Hedayat Mofidi,
Seyyed Ali Hedayat Mofidi
Sustainable Energy Laboratory,
Department of Mechanical Engineering,
University of Utah,
Salt Lake City, UT 84112
e-mail: Ali.Hedayat@Utah.edu
Department of Mechanical Engineering,
University of Utah,
Salt Lake City, UT 84112
e-mail: Ali.Hedayat@Utah.edu
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Kent S. Udell
Kent S. Udell
Professor
Department of Mechanical Engineering,
University of Utah,
Salt Lake City, UT 84112
e-mail: Udell@mech.Utah.edu
Department of Mechanical Engineering,
University of Utah,
Salt Lake City, UT 84112
e-mail: Udell@mech.Utah.edu
Search for other works by this author on:
Seyyed Ali Hedayat Mofidi
Sustainable Energy Laboratory,
Department of Mechanical Engineering,
University of Utah,
Salt Lake City, UT 84112
e-mail: Ali.Hedayat@Utah.edu
Department of Mechanical Engineering,
University of Utah,
Salt Lake City, UT 84112
e-mail: Ali.Hedayat@Utah.edu
Kent S. Udell
Professor
Department of Mechanical Engineering,
University of Utah,
Salt Lake City, UT 84112
e-mail: Udell@mech.Utah.edu
Department of Mechanical Engineering,
University of Utah,
Salt Lake City, UT 84112
e-mail: Udell@mech.Utah.edu
1Corresponding author.
Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF ENERGY RESOURCES TECHNOLOGY. Manuscript received September 4, 2018; final manuscript received December 25, 2018; published online January 18, 2019. Assoc. Editor: Guangdong Zhu.
J. Energy Resour. Technol. Jun 2019, 141(6): 062004 (10 pages)
Published Online: January 18, 2019
Article history
Received:
September 4, 2018
Revised:
December 25, 2018
Citation
Hedayat Mofidi, S. A., and Udell, K. S. (January 18, 2019). "Absorption Process in MgCl2–NH3 Thermochemical Batteries With Constant Mass Flow Rate." ASME. J. Energy Resour. Technol. June 2019; 141(6): 062004. https://doi.org/10.1115/1.4042406
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