1. Government Engineering College
HEAT EXCHANGER
Mechanical Engineering Department
Sub: Heat Transfer
Sub Code:
Presented by:
PAREKH JAYDEEP MUKESHBHAI

2. Compact Heat Exchanger
A type of heat exchanger which is specifically designed to realize the larger heat transfer area per unit volume.
A heat exchanger with β>700m2/m3 is classified as being compact heat exchanger, e.g.
Car radiator(β≈1000m2/m3)
Gas ceramic gas turbine heat exchanger(β≈6000m2/m3)
Human lung(β≈20,000m2/m3)
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3. Characteristics of Compact Heat Exchanger
Large extended surfaces.
High β>700m2/m3(200ft2/ft3)
Small hydraulic diameter.
Usually at least one of the fluid is gas.
Fluid must be clean.
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4. Types of Compact Heat Exchangers
Tubular heat exchanger
Fin-plate heat exchanger
Tube-fin heat exchanger
Plate-frame heat exchanger
Regenerative heat exchanger
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5. Tubular heat exchanger:-
Flow pattern: cross flow
Fluids: Gas-liquid
Construction:
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6. Tube-fin heat exchanger:-
Flow pattern: cross flow, counter flow
Fluids:Gas-liquid
Construction
Spiral HE Longitudnal HE
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7. Regenerative heat exchanger:-
Flow pattern: Alternative flow pattern
Fluids: Gas-Gas
Construction: A matrix
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8. Plate-frame heat exchanger:-
Flow pattern: Counter flow
Fluids: Liquid-liquid
construction
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9. PLATE-FRAME
HEAT EXCHANGER
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10. Parts of Plate-Frame Heat Exchanger:-
Fixed frame
Plates
Gasket
Pressure plate
Carrier bars
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11. Material of construction:
Parts
1)Plates
2)Gasket
3)Frames
4)Nozzles
5)Tie bolts
Material
Stainless steel
Styrene butadiene rubber
Carbon steel
Stainless steel,titanium
Cr,Mo low –alloy steel
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13. Flow arrangement:-
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14. ADVANTAGES: High performance heat exchanger plates.
Very high heat transfer coefficients due to best utilization of surfaces.
Compact and low price solutions.
Easy installation and maintenance.
Flexibility to add/remove plates for higher/lower capacity requirements.
Much less space than shell & tube exchanger.
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15. APPLICATION AREAS: In car radiators.
Tank heating for various processes in industry.
Applications in chemical, pharma-ceutical and food processing systems.
Exchange and recovery of heat in industrial plants.
Heating and production of hot domestic water from solar panels.
Pasteurization of beverages.
Air conditioning systems.
Cooling of industrial oils, cooling circuit of machinary.
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16. COMPARANCE WITH SHELL TUBE HEAT EXCHANGER:
They occupy 80% less space as compared shell and tube heat exchanger.
Overall Heat transfer coefficient is three or four times higher as compared to shall and tube heat exchanger.
Low pressure and low temperature devices.
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17. LIMITATIONS: Max. Design Pressure: 25 Bar
Max. Design Temperature: 200°C
It is only used for clean fluids.
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