HEAT EXCHANGER DESIGN GOALS: o Role ofheat exchangers in chemical processing o Basic concepts and terminology Types ofheat exchangers Design methodology 今S E Design → Rating /2499 Heat Exchanger desigr
8/24/99 Heat Exchanger Design 1 HEAT EXCHANGER DESIGN GOALS: u Role of heat exchangers in chemical processing u Basic concepts and terminology u Types of heat exchangers u Design methodology ð Sizing ð Design ð Rating
PURPOSE OF A HEAT EXHANGER o To Heat or Cool a stream flowing from item of equipment to another. The steam may be a ey A liquid 中Ag E A multiphase mixture o To Vaporize a liquid stream To Condense a vapor stream /2499 Heat Exchanger desigr
8/24/99 Heat Exchanger Design 2 PURPOSE OF A HEAT EXHANGER u To Heat or Cool a stream flowing from item of equipment to another. The steam may be a: ð A liquid ð A gas ð A multiphase mixture u To Vaporize a liquid stream u To Condense a vapor stream
SINGLE TUBE PASS. SINGLE SHELL PASS COUNTERCURRENT HEAT EXCHANGER Shell side Shell side Outlet Tube side Tube side Outlet Inlet nozzle nozzle 8/24/99 Heat Exchanger desi
8/24/99 Heat Exchanger Design 3 Shell Side Inlet Nozzle Shell Side Outlet Nozzle Tube Side Inlet Nozzle Tube Side Outlet Nozzle SINGLE TUBE PASS, SINGLE SHELL PASS COUNTERCURRENT HEAT EXCHANGER
TYPES OF HEAT EXCHANGER SERVICE o Fluid heated by external utility E Steam Ey Hot oil or molten salt E Combustion gas (furnace) E Electricity(resistive, inductive, microwave ◆ Fluid cooled by external utility E Cooling water E Refrigeration o Fluid heated or cooled by other process stream /2499 Heat Exchanger desigr
8/24/99 Heat Exchanger Design 4 TYPES OF HEAT EXCHANGER SERVICE u Fluid heated by external utility ð Steam ð Hot oil or molten salt ð Combustion gas (furnace) ð Electricity (resistive, inductive, microwave) u Fluid cooled by external utility ð Cooling water ð Refrigeration u Fluid heated or cooled by other process stream
TYPES OF HEATING AND COOLING CURVES Sensible heat- heating Sensible heat-Cooling T(K) Pure Component Condensation or vaporization Multicomponent Cooling/Condensation DUTY Q(KJ/s) /2499 Heat Exchanger Desigr
8/24/99 Heat Exchanger Design 5 DUTY Q (kJ/s) T (K) Sensible Heat - Heating Sensible Heat - Cooling Pure Component Condensation or Vaporization Multicomponent Cooling/Condensation TYPES OF HEATING AND COOLING CURVES