000010702 001__ 10702
000010702 005__ 20240531171551.0
000010702 0247_ $$2doi$$a10.24868/10702
000010702 245__ $$a4E Performance Analyses of Supercritical Carbon Dioxide Bottoming Cycle for Shipboard Applications
000010702 269__ $$a2022-10-17
000010702 336__ $$aConference Proceedings
000010702 520__ $$aTypically, shipboard gas turbine exhibits higher exhaust temperatures (ranging from about 4500C at around 25% load, up to around 5750C at the rated load) as compared to their diesel engine equivalent, which implies that a higher amount of useful thermal energy vents out through its exhaust. The thermal exergy contained in a typical LM2500 exhaust can be tapped to generate additional power by thermodynamically inter-connecting a supercritical CO2based bottoming power cycle. This research article therefore presents investigations of Energy-Exergy-Economic & Environment (4E) performance analyses of supercritical carbon dioxide regenerative waste heat recovery (bottoming cycle) power cycle thermodynamically coupled with LM2500 gas turbines (topping cycle) onboard a typical frigate class platform to improve overall plant efficiency and produce additional power. A range of 100% to 10% load has been considered since onboard naval ships, gas turbines scarcely operate at 100% power (only around 1-2% of the entire life) while because of the parabolic nature of the propeller (load) curve, fleet speeds between 12 to 16 knots are achieved with GTs running around 40 % (8.8 MW) or lower of their rated power (22 MW). With the proposed integration, significant improvement (~ 11%) in both energy and exergy efficiency of the shipboard GT is accruable, besides an additional power increment of around 4.8 MW (~ 22% of the GT rated power) without any extra fuel and carbon emissions. With the novel energy recovery system, ship can achieve additional range (26490 nm) and additional endurance (almost 69 days-at-sea) per year. In addition, the fleets can save significant carbon emissions of 4100 (ton-[CO2]/yr/ship) at 60% relative GT load, besides earning carbon-credits worth about USD 61501 at 60% relative GT load per ship annually.
000010702 542__ $$fCC-BY-NC-ND
000010702 6531_ $$aEnergy-Exergy-Economic-Environment (4E)
000010702 6531_ $$aSupercritical CO2
000010702 6531_ $$aLM2500 gas turbines
000010702 6531_ $$aBottoming Cycle
000010702 6531_ $$aFrigate
000010702 6531_ $$aShipboard Applications
000010702 7001_ $$aSharma, OP
000010702 7001_ $$aManjunath, K$$uDelhi Technological University
000010702 7001_ $$aTyagi, SK$$uIIT Delhi
000010702 7001_ $$aKaushik, SC$$uIIT Delhi
000010702 773__ $$tConference Proceedings of INEC
000010702 773__ $$jINEC 2022
000010702 85641 $$uhttps://www.imarest.org/events/category/categories/imarest-event/international-naval-engineering-conference-and-exhibition-2022$$yConference website
000010702 8564_ $$94be15bd0-3490-4709-a2e6-9a698687a938$$s536095$$uhttps://library.imarest.org/record/10702/files/INEC_2022_paper_48.pdf
000010702 980__ $$aConference Proceedings