Process development and thermodynamic, environmental, and economic assessments of a novel co-feed multigeneration arrangement using coke oven gas and geothermal energy

Bingxin Li, Xiaojing Yang and Xuezhi Mao

Energy, 2025, vol. 332, issue C

Abstract: The present research shows the feasibility of an integrated co-feed multigeneration process, which utilizes both coke oven gas and geothermal energy and delves into its investigation. The recently developed system includes numerous interconnected components, namely a COG-fed power and heat generation unit, a dual organic Rankine cycle unit, a single flash power unit, a multi-effect desalination unit, an absorption chiller unit, an ammonia Rankin cycle unit, and a hydrogen generation unit. The present work employs the Aspen HYSYS simulation software to model the aforementioned process, and subsequent analyses are conducted in the domains of exergy, energy, economics, and environment. The findings are juxtaposed with analogous investigations. Based on the simulation, the proposed structure can produce 297900 kW of power, 2148 "kg/s" of domestic hot water, 35.61 "kg/s" of chilled water, 0.56 "kg/s" of hydrogen, 4.431 "kg/s" of oxygen, and 129 "kg/s" of fresh water. According to the outcomes, the total unit cost of the product, cost of energy for this newly developed process, exergy efficiency, and overall energy efficiency are 18.415 $/GJ, 0.253 $/kWh, 42.05%,and43.35%, respectively. The entire amount of exergy destruction is 946,593 kW, and the single flash power unit has the highest exergy destruction rate with a share of 53 %, equivalent to 497453 kW. The environmental investigation demonstrates that the entire direct emissions of carbon dioxide for the process is 209786.76 kg/h and the carbon dioxide net emission is 197799.34 kg/h. Moreover, the net specific carbon dioxide emission is calculated to be 0.23 kgCO2/kWh.

Keywords: Co-feed multigeneration; Coke oven gas; Geothermal energy; Aspen HYSYS; CO2 emission; Economic analysis (search for similar items in EconPapers)
Date: 2025
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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:332:y:2025:i:c:s0360544225027537

DOI: 10.1016/j.energy.2025.137111

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