Zhang, Guofeng and Dizayee, Rubar Hassan and Goyal, Vishal and Jiao, Yunjing and Alsenani, Theyab R. and Majdi, Hasan Sh. and Dahari, Mahidzal and Nguyen, Van Giao and Ali, H. Elhosiny and Le, Huu Cuong (2023) Proposal and exergetic/net present value optimization of a novel integrated process into a two-stage geothermal flash cycle, involving bi-evaporator refrigeration unit: Application of non-dominated sorting genetic algorithm (NSGA-II plus LINMAP) method. Process Safety and Environmental Protection, 179. pp. 735-753. ISSN 0957-5820, DOI https://doi.org/10.1016/j.psep.2023.09.025.
Full text not available from this repository.Abstract
Considering the benefits of geothermal energy in low-temperature combined processes, this study intends to present, examine, and optimize a novel thermal integration process incorporated into a two-stage geothermal flash cycle. In order to meet this objective, a modified bi-evaporator refrigeration technology using an ejector has been designed, with the capability of generating coolant for air-conditioning and industrial requirements. Furthermore, the entire system utilizes a low-temperature water electrolysis process for hydrogen production. In addition to designing a new process, this study incorporates advanced methodologies to comprehensively analyze the proposed system's thermodynamic, economic, and exergoenvironmental aspects. In this context, an extensive parametric study is undertaken, followed by the definition of two distinct multi-objective optimization scenarios: the energy-environment and the energy-cost scenarios. Based on the outcomes derived from the first scenario, the corresponding objective functions, namely energy efficiency and exergoenvironmental index, are determined to be 52.89% and 0.5, respectively. This condition is also responsible for generating net output electricity, cooling load, and hydrogen production rate of 3.897 MW, 26.88 MW, and 4.02 kg/h, respectively. Moreover, it exhibits an exergy destruction rate of 5493 kW. In the second scenario, the objective functions, i.e., energetic efficiency and payback period, are calculated to be 39.37% and 3.94 years, respectively. The aforementioned products demonstrate capacities of 3.697 MW, 17.66 MW, and 5.0 kg/h, respectively. Besides, the exergy destruction rate is determined to be 4667 kW.
| Item Type: | Article |
|---|---|
| Funders: | China Scholarship Council (No. 201908130257), Natural Science Foundation of Hebei Province (E2015409022), Science and technology research project of Hebei higher education (ZD2017201) |
| Uncontrolled Keywords: | Bi-evaporator; Two -stage geothermal flash cycle; Low -temperature electrolyzer; Trigeneration application; Parametric study; NSGA-II method |
| Subjects: | T Technology > TD Environmental technology. Sanitary engineering T Technology > TP Chemical technology |
| Divisions: | Faculty of Engineering > Department of Electrical Engineering |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 27 Oct 2025 08:11 |
| Last Modified: | 27 Oct 2025 08:11 |
| URI: | http://eprints.um.edu.my/id/eprint/50146 |
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