Thermo-economic comparison of two models of combined transcritical CO2 refrigeration and multi-effect desalination system

Alhasan Ali Abdulwahid, Hongxia Zhao, Zheng Wang, Guangdi Liu, Essam E Khalil, Yanhua Lai and Jitian Han

Applied Energy, 2022, vol. 308, issue C, No S0306261921015750

Abstract: Combined refrigeration and boosted multi-effect desalination systems (B-MED) are very useful and energy efficient for water and cold cogeneration. This study aims to improve such an integrated system. An original system of a combined transcritical CO2 refrigeration and boosted multi-effect desalination is studied and analyzed at 85 ℃ inlet heat source temperature; the desalination cycle in the original system (1B-MED) consists of six effects and one booster module. The original model is modified by adding another booster module; the desalination cycle in the modified system (2B-MED) consists of six effects and two booster modules at 85 ℃. By increasing the inlet heat source temperature, the number of effects increases. A Thermo-economic analysis is obtained to analyze and assess the two systems at different inlet heat source temperatures 85–110 ℃ with a various number of effects 6–11 effects. The results show that the modified system with two booster modules is thermo-economically more efficient than the original one with one booster module since the freshwater production rate increases by around 65, 74, 82, 87, 97 and 104 m3 per day at 85, 90, 95, 100, 105, and 110 ℃, respectively, with an increasing rate of 22 % – 23 %. Moreover, the unit product cost UPC of the modified system decreases to reach its lowest value at 105, 110 ℃, with a decreasing rate of more than 25 % compared to the original model with one booster module.

Keywords: Boosted Multi-effect desalination; Combined system; Transcritical CO2 refrigeration system; Two booster modules; Thermo-economic analysis; Freshwater production rate (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (3)

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DOI: 10.1016/j.apenergy.2021.118320

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