Coil Condensers, Information

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Composed completely of glass, coil heat exchangers are typically used as vapor condensers and liquid coolers. They are usually designed and installed as an integral part of a vertical column. To provide a reliable corrosion resistant internal seal, the coil battery is sealed to the jacket, creating a single unit. Boilers and immersion heaters are also available in this all-glass coil design.

Other Designs
We also offer glass cascade coolers, bayonet and jacketed-type heat exchangers. For further information on these special application models, please contact us.

Shell & Tube Heat Exchangers
We also offer a wide range of shell and tube heat exchangers ranging from 13.5 to 505 sq. ft., all capable of modular expansion. For further information on these units go to the heat exchanger page, or contact us.

Technical Data
Heat Transfer in Condensers
The heat transferred in coil condensers con be considered generally as 55 Btu/hr-ft2-°F for any unit. This figure may vary from 10 to 72 Btu/hr-ft2-°F depending on the fluids involved and the operating conditions.

Jacket Side

Vapor to be
condensed

Liquid to be
cooled

Gas To be
cooled

Coil Side

Cooling Water

Cooling Water

Cooling Water

Heat Transfer
Coefficient
BTU/hr. - ft2 - °F

50

50

50

The heat transfer coefficient also varies with the size of the condenser. The following table gives an indication of the performance of condensers at atmospheric pressure, using water as a coolant in the coils (inlet temperature 68 F) and steam condensing in the jackets. These figures do not show the maximum performance of the units but are a general indication of typical working conditions.

 

Condenser
Catalog
Reference

Surface
Area
ft2

Water
Flow Rate
lbs/hr

Steam
Condensed
lbs/hr

GHE1.5

2

1540

15

GHE2

3.5

2200

25

GHE3

3.5

2200

25

GHE4

5

3300

40

GHE6/10

10

3500

70

GHE6/15

15

3300

110

GHEU9A

25

6600

198

GHEU12/25

25

6000

175

GHEU12/40

40

10400

282

GHEU450/60

60

11000

435

GHEU450/80

80

9300

585

GHEA600

120

14300

850

 

Applications

Coil heat exchangers are an all-glass design. There are no internal sealing problems, as the coil is welded into the jacket forming a one-piece unit. This design is a practical means of packing a large amount of heat transfer surface into a small volume.

 

Coil Condensers are used in three general Applications
Vapor inlet at BottomVapor inlet at TopLiquid--Liquid Exchange
· Coolant inside the coils.
· Condensate falls against the rising vapor and exits at its boiling point.
· Coolant inside the coils.
· Condensate exits at the bottom at temperatures below its boiling point, depending on surface area of the condenser and flow rate of the coolant.
· Coolant inside the coils.
· Hot liquid in shell flows countercurrently to coolant.
· Cooled liquid exits at top of unit.

 

Notes on the use of coil type condensers

  1. Condensers should never be used without an adequate flow of coolant through the coils. Do not allow the coolant to become heated to boiling point.
  2. Condensers should never be used with steam in the coil.
  3. Take care to arrange the coolant supply in such a way as to avoid water hammer. Be certain that there is a uniform, continuous supply of coolant. (For HE 600 condensers, the fitting of an anti-water hammer device is recommended.)
  4. Coolant control valves should always be turned on and off slowly, particularly when air is present in the line. Coolant should be allowed to drain freely to a point as close as practicable to the heat exchanger. Brine in a closed circuit can be used as coolant provided that suitable precautions against hammer are taken.
  5. We recommend a maximum gauge pressure of 40 psig in the coils.
  6. Adequate flexible hose should be used for connecting the condenser to the water main to assure that stresses are not transmitted to the glass.
  7. If a condenser is to be out of service for a period of time. drain the coils. In winter suitable precautions should be taken to prevent freezing of any water remaining after draining.
  8. Condensers can be mounted in a series to provide larger surface areas.

 

Note:
 
allowing a minimum pressure drop of 30 psi (2.1 bar) will result in the most efficient overall heat transfer.

 

Coil Condensers, 1

Catalog ReferenceGHE 1.5GHE 2GHE 3GHE 4GHE 6/10GHE 6/15GHEU 9A
Heat Transfer Areaft223.53.55101525
Lmm610610610610610840790
L1mm859090120150150180
L2mm100959580100100125
DNmm405080100150150225
DN1mm    252525
dmm16161619   
 
Weight Emptylb.23410152235
Weight Fulllb.34 1/2512213151
Shell Capacitygal.0.30.40.51.22.42.95.3
Maximum Cooling Water Rategal./hr.200340340720720480940
Operating TemperaturesoF300°F max/min - above collant's freezing point
Maximum Thermal ShockoF216
Max. Working Pressure-Shellpsig50403025202011
Max. Working Pressure-Coilpsig40

 

All 3-outlet coil units have tubes spaced equidistant from the face to the center of the nozzle (120° spacing)

 

Coil Condensers, 2

Catalog ReferenceGHEU 12/25GHEU 12/40GHEU 450/60GHEU 450/80GHE 600
Heat Transfer Areaft225406080120
Lmm6109007609001250
L1mm250250350350485
L2mm125125150150300
DNmm300300450450600
DN1mm2525404050
 
Weight Emptylb.4666100120270
Weight Fulllb.6495134163381
Shell Capacitygal.1010.626.428.270
Maximum Cooling Water Rategal./hr.7201532153213001800
Operating TemperaturesoF300°F max/min - above collant's freezing point
Maximum Thermal ShockoF

216

Max. Working Pressure-Shellpsig88664
Max. Working Pressure-Coilpsig

40