Boiler house

Sample coolers

Page 2 of 3

Performance

The tables below show typical sample outlet temperatures above cooling water inlet temperatures for several pressures and cooling

water flowrates.

Example

A sample flowrate of 30 I/h is required from a boiler operating at 10 bar g. For a cooling water flowrate of 0.3 I/s from Table 1 the sample

outlet temperature would be 4°C above the cooling water inlet temperature. If the cooling water is at 15°C, the sample temperature would

be 19°C.

Table 2 is used in the same way for steam.

Samples may not be taken where marked '-' as the flow is limited by the sample inlet valve capacity.

Table 1 Saturated water

(e.g. boiler water)

Cooling water flowrate

0.1 l/sec

Cooling water flowrate

0.3 l/sec

Sample

flowrate

l/h

Cooling water flowrate

0.6 l/sec

Boiler pressure bar g

1

3

7

10

20

1

3

7

10

20

1

3

7

10

20

1°C

1°C

3°C

6°C

6°C

0°C

0°C

1°C

1°C

4°C

2°C

2°C

6°C

8°C

8°C

1°C

1°C

2°C

2°C

6°C

5°C

5°C

8°C 11°C 11°C

3°C

3°C

4°C

4°C

8°C

7°C

7°C

11°C 13°C 13°C

5°C

5°C

6°C

6°C 10°C

10°C

10°C

13°C 15°C 15°C

6°C

6°C

8°C

8°C 12°C

14°C

14°C

16°C 18°C 18°C

9°C

9°C 10°C

10°C 14°C

16°C

18°C

20°C 22°C 22°C

11°C 12°C 13°C

14°C 18°C

18°C

20°C

24°C 26°C 27°C

15°C 16°C 16°C

18°C 22°C

22°C

23°C

29°C 30°C 31°C

17°C 18°C 20°C

23°C 26°C

10

0°C

20

0°C

30

0°C

40

1°C

50

3°C

60

4°C

80

6°C

100

10°C

120

11°C

Table 2 Saturated steam

Sample

flowrate

5

10

15

20

30

40

50

60

70

0°C

0°C

0°C

0°C

0°C

2°C

1°C

2°C

3°C

4°C

5°C

5°C

7°C

8°C

11°C

12°C

13°C

15°C

0°C

2°C

1°C

4°C

3°C

6°C

3°C

8°C

5°C

9°C

6°C 11°C

9°C 15°C

13°C 18°C

17°C 22°C

Cooling water flowrate

0.1 l/sec

Cooling water flowrate

0.3 l/sec

Boiler pressure bar g

kg/h

0.5

2

5

7

10

20

0.5

2

5

7

10

20

0.5

2

5

7

10

20

Cooling water flowrate

0.6 l/sec

3°C 3°C 4°C 5°C 6°C

6°C

2°C 2°C 3°C 3°C

4°C 4°C

-

7°C 8°C 8°C 8°C

9°C

-

4°C 4°C 4°C

4°C 5°C

-

-

9°C 10°C 10°C 11°C

-

-

5°C 6°C

6°C 7°C

-

-

- 12°C 13°C 14°C

-

-

-

8°C

9°C 9°C

-

-

-

-

21°

C

21°C

-

-

-

-

14°

C

14°C

-

-

-

-

-

28°C

-

-

-

-

-

20°C

-

-

-

-

-

35°C

-

-

-

-

-

25°C

-

-

-

-

-

42°C

-

-

-

-

-

30°C

-

-

-

-

-

-

-

-

-

-

-

-

1°C

1°C

-

1°C

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

-

1°C

2°C

2°C

2°C

2°C

2°C

2°C

2°C

2°C

2°C

3°C

4°C

5°C

6°C

9°C 10°C

-

4°C

-

-

-

-

-

13°C

-

-

-

17°C

-

-

-

21°C

SC20 Sample Coolers

TI-P403-09 AB Issue 9

Page 2 of 3

2.6.3