TY  - GEN
N2  - Typically, 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.
DO  - 10.24868/10702
DO  - doi
AB  - Typically, 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.
AD  - Delhi Technological University
AD  - IIT Delhi
AD  - IIT Delhi
T1  - 4E Performance Analyses of Supercritical Carbon Dioxide Bottoming Cycle for Shipboard Applications
DA  - 2022-10-17
AU  - Sharma, OP
AU  - Manjunath, K
AU  - Tyagi, SK
AU  - Kaushik, SC
L1  - https://library.imarest.org/record/10702/files/INEC_2022_paper_48.pdf
JF  - Conference Proceedings of INEC
VL  - INEC 2022
PY  - 2022-10-17
ID  - 10702
L4  - https://library.imarest.org/record/10702/files/INEC_2022_paper_48.pdf
KW  - Energy-Exergy-Economic-Environment (4E)
KW  - Supercritical CO2
KW  - LM2500 gas turbines
KW  - Bottoming Cycle
KW  - Frigate
KW  - Shipboard Applications
TI  - 4E Performance Analyses of Supercritical Carbon Dioxide Bottoming Cycle for Shipboard Applications
Y1  - 2022-10-17
L2  - https://library.imarest.org/record/10702/files/INEC_2022_paper_48.pdf
LK  - https://www.imarest.org/events/category/categories/imarest-event/international-naval-engineering-conference-and-exhibition-2022
LK  - https://library.imarest.org/record/10702/files/INEC_2022_paper_48.pdf
UR  - https://www.imarest.org/events/category/categories/imarest-event/international-naval-engineering-conference-and-exhibition-2022
UR  - https://library.imarest.org/record/10702/files/INEC_2022_paper_48.pdf
ER  -