Requirement for Cooling water system for ( Atlas Copco ZR55-9-60-P Rotary Screw Air Compressors )

Question Title: Requirement for Cooling water system for ( Atlas Copco ZR55-9-60-P Rotary Screw Air Compressors )
Asked by: Ahmad Jan : Project Engineer Marine services Company Ltd Jeddah.
Asked On:
Answers: 1

Cooling system required for ( Atlas Copco ZR55-9-60-P Rotary Screw Air Compressors )

Air inlet temperature = 50 deg C

Inlet pressure = 3.0 barg

Pressure drop = 0.17 kpa

Compressed air flow rate=260 cu.m /hr. Site

Conditions: B. Climatic Conditions-Air Temperatures Range of monthly maximum 35.1 to 60.0 C Range of monthly minimum 6.0 to 12.00 C

Range of monthly mean daily maximum 25.5 to 35.90 C

Range of monthly mean daily minimum 12.3 to 26.00 C.

Relative Humidity Maximum relative humidity 100%

Minimum relative humidity 6% D. 1.5.3 General data from available records:

Annual Rainfall (erratic) Average of 100 mm

Wettest Months December through March

Driest Months April through November

Wind Velocity Maximum of 135 km/hr

Velocity and Exposure Class C (carrying sand and dust)

Seismic Classification Zone 2A

Longitude 38.2275 ° E Latitude 23.9994 ° N

Location: KSA Royal Commission/Jeddah

Answers & Replies

Cas

7 years ago

Hi,
You can find the cooling water requirements in the compressor manual.

For the ZR55 I found the following:

Cooling water inlet water temp = below 35 degrees Celsius

Cooling water outlet temp = below 50 degrees Celsius.

Max. cooling water pressure = 7 bar

I also found that for a dT (temp difference) of 15 degrees, the compressor needs a cooling water flow of 0.8 l/s (liters per second ).

Make sure the water is clean, no acids, etc.

All the best,

Cas