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DESIGN AND OPTIMIZATION OF WASTE HEAT RECOVERY UNIT USING CARBON DIOXIDE AS COOLING FLUID

DESIGN AND OPTIMIZATION OF WASTE HEAT RECOVERY UNIT USING CARBON DIOXIDE AS COOLING FLUID

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Konferansebidrag og faglig presentasjon
Sammendrag
This paper describes design and optimization of a Waste Heat Recovery Unit (WHRU) for a power cycle which uses CO2 as a working fluid. This system is designed for offshore installation to increase gas turbine efficiency by recovering waste heat from the exhaust for production of additional power. Due to severe constraints on weight and space in an offshore setting, it is essential to reduce size and weight of the equipment to a minimum. Process simulations are performed to optimize the geometry of the WHRU using different objective functions and thermal-hydraulic models. The underlying heat exchanger model used in the simulations is an in-house model that includes the calculation of weight and volume for frame and structure for the casing in addition to the thermal-hydraulic performance of the heat exchanger core. The results show that the for a set of given process constraints, optimization with respect to minimum total weight or minimum core weight shown similar results for the total installed weight, although the design of heat exchanger differs. The applied method also shows how the WHRU geometry can be optimized for different material combinations
Oppdragsgiver
  • Norges forskningsråd / 203310
Språk
Engelsk
Forfatter(e)
Institusjon(er)
  • SINTEF Energi AS / Gassteknologi
  • SINTEF Energi AS / Energibruk
  • Norges teknisk-naturvitenskapelige universitet
Presentert på
ASME Power 2014 Conference
Sted
Baltimore, Maryland
Dato
27.07.2014 - 30.07.2014
Arrangør
ASME
År
2014