Doug Gavic M.S. Graduate Student Mechanical Engineering Room: 1327 ERB Email: [e-mail] Hometown: Oakdale, MN

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Doug GavicM.S. Graduate StudentMechanical
EngineeringRoom 1327 ERBEmail
dgavic_at_wisc.eduHometown Oakdale, MN

• Thesis Heat Exchanger Design for Supercritical
  Carbon Dioxide Brayton Cycles

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Brayton Cycle for Heat Exchanger Design
Compressor
Turbine
Generator
Supercritical Carbon Dioxide
Primary Heat Exchanger
Recuperator
600C Molten Salt from Solar Central Receiver
Water at 15C from Cooling Tower
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Objectives

• Conduct a detailed design study of the Primary,
  Recuperator, and Precooler heat exchangers
• Determine the optimal heat exchanger dimensions,
  geometries and flow configurations needed for
  this cycle to be realized in practice
• Assess how pressure drops, fouling, methods of
  manufacturing, and surface type affect the
  performance of the heat exchangers

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Motivation

• Compared to conventional Rankine steam cycles,
  supercritical CO2 gas turbine cycles offer
  several possible advantages
• Higher efficiency
• Reduced size and complexity
• Reduced water usage for cooling
• High density super-critical carbon dioxide allows
  for reduced compressor work, increasing
  efficiency
• High density also means that machinery can be
  more compact and simpler, reducing
  capital/operating costs
• Using high performance heat exchangers allows for
  self cooling and heating, reducing water usage
  and energy costs