Multi-physical field simulations of directional seawater freeze-crystallisation under a magnetic field

Song, Ruikai; Wang, Kunwei; Gong, Mengting; Yuan, Han

doi:10.1016/j.desal.2023.116687

Cited by 8 publications

(1 citation statement)

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“…A single thermal cycle can concurrently generate power, provide refrigeration, support cold storage, facilitate desalination, and deliver other outputs, significantly enhancing the overall utilization efficiency of marine exhaust heat energy. Thirdly, among existing desalination methods, frozen-seawater desalination yields low efficiency but low cost, while RO desalination is efficient but expensive [24][25][26][27]. Consequently, this study integrates the strengths of both methods, utilizing seawater-freezing desalination to significantly lower the feedwater salinity for reverse osmosis desalination, thereby reducing overall seawater desalination costs.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis and Multi-Objective Optimization of a Cooling-Power-Desalination Combined Cycle for Shipboard Diesel Exhaust Heat Recovery

Gao,

Zhao,

Zhang

et al. 2023

Sustainability

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This study presents a novel cooling-power-desalination combined cycle for recovering shipboard diesel exhaust heat, integrating a freezing desalination sub-cycle to regulate the ship’s cooling-load fluctuations. The combined cycle employs ammonia–water as the working fluid and efficiently utilizes excess cooling capacity to pretreat reverse osmosis desalination. By adjusting the mass flow rate of the working fluid in both the air conditioning refrigeration cycle and the freezing desalination sub-cycle, the combined cycle can dynamically meet the cooling-load demand under different working conditions and navigation areas. To analyze the cycle’s performance, a mathematical model is established for energy and exergy analysis, and key parameters including net output work, comprehensive efficiency, and heat exchanger area are optimized using the MOPSO algorithm. The results indicate that the system achieves optimal performance when the generator temperature reaches 249.95 °C, the sea water temperature is 22.29 °C, and 42% ammonia–water is used as the working fluid. Additionally, an economic analysis of frozen seawater desalination as RO seawater desalination pretreatment reveals a substantial cost reduction of 22.69%, showcasing the advantageous features of this proposed cycle. The research in this paper is helpful for waste energy recovery and sustainable development.

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Section: Introductionmentioning

confidence: 99%