Version 1
: Received: 22 March 2024 / Approved: 22 March 2024 / Online: 22 March 2024 (14:49:21 CET)
How to cite:
Bruno, R.; Ferraro, V.; Bevilacqua, P.; Barone, P. Energy and Exergy Analyses of an Innovative Heat Recovery System from the LNG Regasification Process in Green Ships. Preprints2024, 2024031391. https://doi.org/10.20944/preprints202403.1391.v1
Bruno, R.; Ferraro, V.; Bevilacqua, P.; Barone, P. Energy and Exergy Analyses of an Innovative Heat Recovery System from the LNG Regasification Process in Green Ships. Preprints 2024, 2024031391. https://doi.org/10.20944/preprints202403.1391.v1
Bruno, R.; Ferraro, V.; Bevilacqua, P.; Barone, P. Energy and Exergy Analyses of an Innovative Heat Recovery System from the LNG Regasification Process in Green Ships. Preprints2024, 2024031391. https://doi.org/10.20944/preprints202403.1391.v1
APA Style
Bruno, R., Ferraro, V., Bevilacqua, P., & Barone, P. (2024). Energy and Exergy Analyses of an Innovative Heat Recovery System from the LNG Regasification Process in Green Ships. Preprints. https://doi.org/10.20944/preprints202403.1391.v1
Chicago/Turabian Style
Bruno, R., Piero Bevilacqua and Piofrancesco Barone. 2024 "Energy and Exergy Analyses of an Innovative Heat Recovery System from the LNG Regasification Process in Green Ships" Preprints. https://doi.org/10.20944/preprints202403.1391.v1
Abstract
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.
Keywords
LNG, exergy potential, seawater freezing, ice production, air-conditioning, second law analysis, novel environmental analysis
Subject
Engineering, Energy and Fuel Technology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
