geo pro inc head loss tables
DESCRIPTION
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Pipe Selection Fluid Flow Information
Pipe Material Beginning Flow Rate (gpm) 3.00
DR/SCH/TYPE Flow Rate Intervals (Step) 3.00
Nominal Size Min Flow Rate For Turbulence (gpm) = 4.99
NOTE: Ensure to Refresh Each Pulldown for Every Use Fluid Flow Not Turbulent
Pipe Selection Verification
Pipe InformationPipe Type Polyethylene DR/SCH/TYPE DR-11
Nominal Size (ID) 1-1/4" (1.358") Pipe Volume 7.53 gal / 100'
Circulating Fluid Information
Circulating Fluid Concentration (By Vol) Temperature
Fluid Selection Verification
Fluid InformationFluid Type Dowfrost P.G. Visc. (cp) 4.77
Conc. / Temp. 20% 25°F 64.19
19.4 °F Estimated Freeze Point
Head Loss Calculations
The desired range for head loss is 1-3 ft of head loss per 100' of pipe length
GPM Vel. (ft/sec) Re Number HL* (ft./100 ft) PD (lbs./100 ft)
3.00 0.66 1,504 0.26 0.11
6.00 1.33 3,009 1.04 0.45
9.00 1.99 4,513 2.13 0.92
12.00 2.66 6,018 3.47 1.50
15.00 3.32 7,522 5.08 2.2018.00 3.99 9,027 6.95 3.0121.00 4.65 10,531 9.07 3.9324.00 5.31 12,036 11.42 4.9527.00 5.98 13,540 14.01 6.07
30.00 6.64 15,045 16.83 7.29
33.00 7.31 16,549 19.86 8.61
36.00 7.97 18,054 23.12 10.0239.00 8.64 19,558 26.59 11.5242.00 9.30 21,063 30.27 13.11
45.00 9.97 22,567 34.16 14.8048.00 10.63 24,072 38.25 16.57
51.00 11.29 25,576 42.54 18.4354.00 11.96 27,081 47.04 20.38
57.00 12.62 28,585 51.73 22.41
60.00 13.29 30,090 56.62 24.53
NOTES:
2) PEX, Polyethylene, PVC, and Copper Assumed Smooth - Churchill equation used to calculate friction factors
Swamee-Jain Equation Used to Calculate Friction Factors
Swamee-Jain Equation Used to Calculate Friction Factors 5) Refer to state and local regulations to ensure compliance when selecting circulating fluid type for use with the ground heat exchanger portion of a geothermal heat pump system (GSHP)
Density (lbm/ft3)
1) Head Loss (HL) is determined using the Darcy-Weisbach eq. { (HL) f = f * (L/D) * (V2/2g) }
3) Steel Assumed to Have Effective Roughness of 1.8*10-6 inches (ASHRAE Fundamentals).
4) Rubber Hose Assumed to Have Effective Roughness of 4.0*10-4 inches (Fluid Mechanics - Cengel).
U-Bend Pipe
Pipe Headloss Calculator
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