Energy, exergy and exergoenvironmental assessments of waste heat operated basic and modified cogeneration systems for freshwater and hydrogen production

Mohammad Waqas Chandio; Shafiq Ur Rehman Qureshi; Laveet Kumar; Aftab Hameed Memon

doi:10.1049/rpg2.13180

journal article Open Access Jan 01, 2025

Energy, exergy and exergoenvironmental assessments of waste heat operated basic and modified cogeneration systems for freshwater and hydrogen production

Mohammad Waqas Chandio Shafiq Ur Rehman Qureshi Laveet Kumar

Aftab Hameed Memon

IET Renewable Power Generation Vol. 19 No. 1 · Institution of Engineering and Technology (IET)

View at Publisher Save 10.1049/rpg2.13180

Abstract

Abstract

In this study, thermodynamic and environmental assessments of waste heat driven cogeneration systems are carried out. The cogeneration systems include basic and modified configurations of Organic Rankine cycle (ORC), Reverse osmosis (RO) unit and Proton exchange membrane (PEM) electrolyser. The ORCs are aimed at transforming waste heat into power for the operation of a reverse osmosis (RO) unit and a proton exchange membrane (PEM) electrolyser, for generation of fresh water and hydrogen, respectively. The systems were simulated in engineering equation solver (EES). Among the studied configurations and working fluids, the findings demonstrate that the ORC configuration that combines both an internal heat exchanger and a mixing chamber (HMORC) and employing Isopentane as working fluid showed optimal performance, and showcasing energy and exergy efficiencies, and sustainability index values of 19.31%, 24.63%, and 2.033, respectively. Furthermore, this setup achieves maximum flow rates of 5.211 m
3
/h for fresh water and 2.737 kg/h for hydrogen. Moreover, The parametric study indicates that performance of the cogeneration systems improves with rise in evaporator pressure and drop in condenser pressure. The results highlight the promise of optimised system configuration for effective waste heat recovery and sustainable resource use.

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Citations

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References

Details

Published: Jan 01, 2025
Vol/Issue: 19(1)
License: View

Authors

M

Mohammad Waqas Chandio

Department of Mechanical Engineering Mehran University of Engineering and Technology Jamshoro Sindh Pakistan

S

Shafiq Ur Rehman Qureshi

Department of Mechanical Engineering, Pakistan Navy Engineering College National University of Science and Technology Karachi Pakistan

L

Laveet Kumar

Department of Mechanical and Industrial Engineering, College of Engineering Qatar University Doha Qatar

A

Aftab Hameed Memon

Department of Mechanical Engineering Mehran University of Engineering and Technology Jamshoro Sindh Pakistan

Cite This Article

Mohammad Waqas Chandio, Shafiq Ur Rehman Qureshi, Laveet Kumar, et al. (2025). Energy, exergy and exergoenvironmental assessments of waste heat operated basic and modified cogeneration systems for freshwater and hydrogen production. IET Renewable Power Generation, 19(1). https://doi.org/10.1049/rpg2.13180

Energy, exergy and exergoenvironmental assessments of waste heat operated basic and modified cogeneration systems for freshwater and hydrogen production

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