A waste cryogenic energy assisted freshwater generator for marine applications

Liu, Meixi; Wu, Dawei; Tsolakis, Athanasios; Gao, Wenliang

doi:10.1016/j.desal.2020.114898

Cited by 7 publications

(2 citation statements)

References 45 publications

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“…Many applications to promote freshwater production have been targeted specifically for the marine sector: in [22] a novel generator for vessels assisted by cryogenic energy that, in the optimal configuration, was able to produce over 1000 kg/h of freshwater from feed-in seawater exploiting the vaporization of 3150 kg/h of LNG, was designed. In particular, the authors proposed the employment of an evaporator at low pressure, through the use of a vacuum pump, in which a heat source represented by the exhaust gas of the ship engine promotes the vaporization of seawater.…”

Section: State Of the Artmentioning

confidence: 99%

Energy and Exergy Analyses of an Innovative Heat Recovery System from the LNG Regasification Process in Green Ships

Bruno,

Ferraro,

Bevilacqua

et al. 2024

Preprint

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Despite being stored at 113 K and atmospheric pressure, LNG cold potential is not exploited to reduce green ships’ energy needs. An innovative system based on three Organic Ranking Cycles integrated into the regasification equipment is proposed to produce additional power and recover cooling energy from condensers. A first-law analysis identified ethylene and ethane as suitable working fluids for the first and the second ORC making available freshwater and ice. Propane, ammonia and propylene could be arbitrarily employed in the third ORC for air-conditioning. An environmental analysis that combines exergy efficiency, ecological indices and hazard aspects for marine environment and ship’s passengers, indicated propylene as safer and more environmentally friendly. The exergy analysis confirms more than 20% of the LNG potential can be recovered from every cycle to produce a net clean power of 76 kW, whereas 270 kW can be saved by recovering condensers' cooling power to satisfy some ship needs. Assuming the sailing mode, a limitation of 162 kg in LNG consumptions was determined, avoiding the emission of 1584 kg of CO2 per day. Marine thermal pollution is reduced by 3.5 times by recovering the working fluids' condensation heat for the LNG pre-heating.

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Section: State Of the Artmentioning

confidence: 99%

Energy and Exergy Analyses of an Innovative Heat Recovery System from the LNG Regasification Process in Green Ships

Bruno,

Ferraro,

Bevilacqua

et al. 2024

Preprint

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“…The two-phase fluid obeys the Helmholtz energy law (as in [38]) for water mixtures. The Maxwell criterion is used to calculate the fluid saturation curve (as in [39]). • Thermal library.…”

Section: A Numerical Simulation Modelmentioning

confidence: 99%

Energy Efficiency of the Vulcanization Process of a Bicycle Tyre

Pentakota¹,

Albertelli

Strano

2023

Int. J. of Precis. Eng. and Manuf.-Green Tech.

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The production of tyres is one of the most energy consuming manufacturing activities in the rubber sector. In the production cycle of a tyre, the curing operation has the maximum energy loss. This is mostly due to the extensive use of steam as a source of heat and pressure in the vulcanization process. To the author’s knowledge, no scientific work is available in the literature where the energy efficiency of a tyre vulcanization press is estimated by means of a comprehensive model of all main components, including the moulds, the press with its heated plates, the bladder and, of course, the tyre. The present work aims at filling this gap. First, the press used for developing the model is described, along with its components and its typical product, a bicycle tyre. The instruments used for measuring flow rates, temperatures and pressures are also listed. Then, a numerical model is presented, that predicts the energy transfers occurring in the vulcanization press during a full process cycle. The numerical model, developed with the software Simcenter Amesim 2021.1, has been validated by means of measurements taken at the press. The results indicate that the amount of energy which is actually consumed by the tyre for its reticulation process amounts to less than 1% of the total energy expenditure. The paper demonstrates that the tyre industry is in urgent need of an electrification conversion of the traditional steam-based processes.

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A review of integrated cryogenic energy assisted power generation systems and desalination technologies

Farrukh

Al-Dadah

et al. 2023

Applied Thermal Engineering

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A waste cryogenic energy assisted freshwater generator for marine applications

Cited by 7 publications

References 45 publications

Energy and Exergy Analyses of an Innovative Heat Recovery System from the LNG Regasification Process in Green Ships

Energy and Exergy Analyses of an Innovative Heat Recovery System from the LNG Regasification Process in Green Ships

Energy Efficiency of the Vulcanization Process of a Bicycle Tyre

A review of integrated cryogenic energy assisted power generation systems and desalination technologies

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