PDA

View Full Version : Condenser approach temp







roelescence
13-09-2014, 02:30 AM
The trane RTWD condenser was cleaned. The approach temp. before was 25F and now it's 14F still high. I am suspecting about the volume of water entering the condenser. Is there any instruments to measure the amount of water entering?. I saw that the scales in the tubes were removed. Pls...help

Thank you...

nike123
13-09-2014, 05:55 AM
You need ultrasonic flow meter for that purpose.

moideen
13-09-2014, 10:11 AM
overcharged system may indicate higher condenser approach.

RANGER1
13-09-2014, 11:00 AM
The trane RTWD condenser was cleaned. The approach temp. before was 25F and now it's 14F still high. I am suspecting about the volume of water entering the condenser. Is there any instruments to measure the amount of water entering?. I saw that the scales in the tubes were removed. Pls...help

Thank you...

Did you look down or blow through each tube to make sure they are not blocked.
Chemical clean not always perfect if blocked in middle of tubes.
Have you checked water strainers, sump water level & pump operation.

Are there any valves, etc in water lines that could restrict flow.
Also water sprays in cooling tower.

Glenn Moore
13-09-2014, 09:49 PM
Is the water flow in the condenser the correct way around ?

mark957
14-09-2014, 11:31 AM
Use a differential pressure gauge to measure the pressure loss.
check the correct pressure drop from the manufacturer's manual.

roelescence
16-09-2014, 01:23 AM
There are gate valves and check valves in the water line. Gate valves are old but we've just replaced the check valves

roelescence
16-09-2014, 01:27 AM
There are check valves in the water line, and flow cannot be reversed

moideen
16-09-2014, 02:36 AM
what is the inlet and outlet temp of condenser?

roelescence
16-09-2014, 03:08 AM
Condenser inlet is 84.2F and out is 92.1F.
By the way pls analize this reading for the compressors:
L1 92.5%
L2 93.5%
L3 100.3% of its rated current. Isnt it imballanced?

moideen
16-09-2014, 08:00 AM
As per your condenser delta T (8F) the chilled water flow is ok. But your inlet water temperature is high considering local ambient wet bulb temperature. I think your wet bulb is 70F (google).then condenser inlet should be 75F.arount 9f is high. Check your cooling tower whether it is performs. When inlet temperature is high, approach also will be high.