SOLAR THERMOCHEMICAL ENERGY-STORAGE SYSTEM (THERMOCHEMICAL BATTERY) | ||||
| Misr Journal of Agricultural Engineering | ||||
| Article 7, Volume 39, Issue 3, July 2022, Page 459-474 PDF (2.13 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/mjae.2022.140922.1076 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Shaymaa A. Hassan1; Mubarak M. Mustafa2; Mahmoud Z. Attar   3
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| 1Assist. Lect., Ag. Eng. Dept., Fac. of Ag., Ain Shams U., Cairo, Egypt. | ||||
| 2Prof., Ag. Eng. Dept., Fac. of Ag., Ain Shams U., Cairo, Egypt. | ||||
| 3Assoc. Prof., Ag. Eng. Dept., Fac. of Ag., Ain Shams U., Cairo, Egypt. | ||||
| Abstract | ||||
| This work aimed to investigate the potential of direct storage and restoration of solar energy in a chemical form and to construct a portable, rechargeable, and usable solar thermochemical battery for agricultural applications. Many attempts were conducted to select a suitable thermochemical storage material (TCM) among which are self-indicating silica gel (blue/pink), commercial white silica gel, and natural zeolite. During the experiments, moist TCMs samples were dried (energy-charged) by a one square-meter stainless-steel parabolic solar energy concentrator in three experimental configurations. An experimental aluminum thermochemical battery size filled with of TCMs working as a heat-exchanger and a portable energy charging/discharging thermal battery was evaluated. Energy restoration (discharging) was achieved by applying forced humid air generated from an ultrasonic mist generator and an air-circulation fan through a set of perforated pipes located inside the thermochemical battery. Results showed that TCM self-indicating silica gel was able to store 165 Wh/kg of solar energy at the charging process compared to natural zeolite ( ) and white-silica gel ( ). The energy discharging efficiency of the self-indicating silica gel was , while the efficiency of the natural zeolite and white silica gel was and , respectively. Direct storage and use of solar energy in a thermochemical (TCM) form can reduce costs and maintenance of renewable energy applications compared to the high-cost photovoltaic systems. TCMs thermochemical batteries, like traditional electrical batteries, can act as energy master-key for different agricultural applications, as well as in thermo-sensitive processing and treatment. | ||||
| Keywords | ||||
| Solar energy; Energy storage; Thermochemical battery | ||||
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