Figure 3-3: 8200 Compressor Cooling Water Flow And Pressure Requirements - HELIX 8200 Operating And Service Instructions

8200 Compressor

Figure 3-3: 8200 Compressor Cooling Water Flow and Pressure Requirements

P/N 8040353
Find the minimum pressure:
1. Determine the temperature variation of the cooling water.
Allow a ±10°F to the present water temperature if a variation
cannot be ascertained. Plot the high and low temperatures on
the vertical axis of the lower graph.
The example describes cooling water that varies between 40°F and70°F.
2. Determine the optimum water flow rate by drawing a horizontal
line from the upper temperature variation figure on the lower graph
to the upper curve of the allowable operating range indicated by
cross-hatching. Draw a line from this intersecting point straight
down to the horizontal axis to find the optimal flow rate.
The example shows a solid arrow extending from 70°F and intersecting the
allowable operating range. Dashed arrows pointing downward indicate a
water flow rate of 0.5 gallons per minute.
3. Determine the cooling water supply pressure drop by drawing a line
straight up from the flow rate in the lower graph to the upper graph.
At the point at which this line intersects the upper graph, draw a
line leftward to the vertical axis and find the water supply pressure
drop.
The example shows dashed arrows extending from the lower to the upper
graph. On the upper graph the dashed arrows intersect the graph curve at
approximately 2.5 psig.
-
C TI CRYOGENICS
HELIX TECHNOLOGY CORPORATION
3-5