CONDENSERS

Condensers are used for condensation of vapours and cooling of liquids. Condensers are made by fusing number of parallel
coils in a glass shell. Coils are made in different diameters using tubes of different bores.

The average co-efficient of heat transfer in coil condenser is considered as-
Condensation 200 - 270 Kcal/m²,hr,°C appx.
Cooling 100 - 150 Kcal/m²,hr,°C appx.

 

CONDENSERS

Cat.
Ref.

DN

d/
DN1

L

L1

Type

H.T.A.

Free
Cross
Area
Cm²

Max.
Coolant
Rate
Kg/hr.

Shell
Cap.
Liter

HE3/3.5

80

16

600

100

A

0.35

5

1300

2

HE4/5*

100

19

600

100

A

0.50

30

2400

4

HE4/6

100

19

750

100

A

0.60

30

2400

6

HE6/10

150

25

600

100

B

1.00

52

2600

9

HE6/15*

150

25

850

100

B

1.50

52

2600

11

HE9/25*

225

25

800

100

B

2.50

125

3300

18

HE12/25

300

25

600

125

B

2.50

175

5700

25

HE12/40

300

25

900

125

B

4.00

175

5700

35

HE16/40

400

25

600

125

B

4.00

450

6200

60

HE16/50

400

25

700

125

B

5.00

450

6200

70

HE18/60

450

40

750

150

C

6.00

820

4800

100

HE18/80

450

40

900

150

C

8.00

820

6200

110

HE24/120

600

50

1250

300

C

12.00

1520

6200

265

Precautions to be taken in use of condensers

- Vapours should be passed through shell only.
- Maximum pressure of coolant should be 2.7 bars.
- Adequate flow of coolant should be used.
- Steam should not be used in coils.
- Coolant should not be heated to boiling point.
- Coolant control valve should be turned slowly.
- Coolant should be allowed to drain freely.
- Brine can be used in coils in a closed circuit.
- Water main should be connected with flexible hose.
- Ensure no freezing of water remaining in the coils.
- Condensers should be mounted vertically only.
- Condensers can be mounted in series to provide larger surface area.

METHODS OF USE

Vapours from bottom
This method is simple to install over a reactor. However this results in condensate returning substantially at its condensing temperature. In this method care must be taken that condensate is not excessive that it can lead to "logging" the coils and create back pressure in the system. Generally a reflux divider is used below the condenser to take out the distillate.

Vapours from top

This method produce a cool condensate using the entire cooling surface area. This method should be used where the condensate can lead to "logging" of coils.