GE Merlin User Manual

WORKSHEET - HOW TO DETERMINE RATE OF FLOW FROM THE MERLIN SYSTEM - WORLD
Enter Your Values
Inlet Water TDS (measured) ppm
Inlet Water Temperature °C
Inlet Pressure bar
3/8-inch Tubing meters long
Obstructions in Permeate Line
Elevation Difference Between Merlin and Faucet meters
Post Filter?
Faucet?
Assigned Values
Pressure Drop per Obstruction 0.03 bar
Pressure Drop per Postfilter 0.21 bar
Pressure Drop in Elevation 0.095 bar per meter
(meters Faucet is above Merlin)
1. Determine the Inlet TDS = ppm
2. Determine the Inlet Water Temperature = °C
3. Determine the Net Driving Pressure of the Merlin system
Net Driving Pressure = Inlet Pressure - System Pressure Drop (Follow instructions below)
3A. Calculate the Flow Rate Adjustment Factor
This factor will be used with Table 1 to adjust the TDS of Inlet Water from 750 ppm to ppm.
-0.0002 ( ppm) + 0.15 =
Lpm
3B. Calculate the Tubing Pressure Drop
Inlet Pressure = bar
Water Temp = °C
Use Table 1 to estimate flow rate, 750 ppm NaCl @ °C and bar =
Lpm
Adjust Table data for actual TDS using the Flow Rate Adjustment Factor Lpm
Tubing Flow Rate = Lpm
+ Lpm = Lpm @ ppm NaCl
Use Figure 4 to determine the pressure drop for 0.304 m tubing = bar
T
ubin
g
Pressure Drop for m = 1 m/.0304 m x bar = bar
3C. Calculate the Obstruction Pressure Drop
obstructions X (0.5 bar)=
bar
3D. Calculate Elevation Pressure Drop
meters elevation X 0.095 bar =
bar
3E. Calculate Postfilter Pressure Drop
postfilter X 0.21 bar =
bar
3F. Calculate Faucet Pressure Drop
bar - bar - bar - bar - bar = bar
Use Table 1 to estimate flow rate, 750 ppm NaCl @ °C and bar = Lpm
Adjust Table Data for actual TDS using the Flow Rate Adjustment Factor Lpm
Lpm + Lpm = Lpm @ ppm NaCl
Use Figure 8 and the Inlet Flow Rate of Lpm to estimate the Faucet Pressure Drop =
bar
3G. Calculate the System Pressure Drop
(System Pressure Drop = Tubing PD + Obstruction PD + Elevation PD + Postfilter PD + Faucet PD)
bar + bar + bar + bar + bar = bar
bar
3H. Determine the Net Driving Pressure
(Net Driving Pressure = Merlin Inlet Pressure - System Pressure Drop)
bar - bar =
bar
4. Determine the Merlin Flow Rate
Use Table 1 to estimate flow rate, 750 ppm NaCl @ bar and °C = Lpm
Adjust Table Data for actual TDS using the Flow Rate Adjustment Factor Lpm
Lpm + Lpm = Lpm
TOTAL MERLIN FLOW RATE = Lpm
Actual results may vary. Membrane performance may vary ± 15%.

GE Merlin Specifications

General

Brand	GE
Model	Merlin
Category	Water Filtration Systems
Language	English