Gearpump2

Gearpump2_CL

The procedure Gearpump3 provides a model of a specific manufacturer's gear pump. The parameters displacement, leakage constant, overall efficiency, and maximum DP are determined by curve fit to manufacturer's data and are stored in the Lookup Table 'GearPumps.lkt'. An example of the data is shown in the thumbnail above, but there are many other sets of data to choose from.

Volumetric flow rate is determined from displacement less leakage flow. Power is determined from overall efficiency applied to displacement flow.

Inputs:
F$: fluid string identifier
C: concentration (%) {applicable when F$ is a brine. Otherwise set C=0.}
T_in: inlet temperature (K, C, F, or R)
P_in: inlet pressure (bar, atm, Pa, kPa, MPa)
P_out: outlet pressure (bar, atm, Pa, kPa, MPa)
N: rotational speed (1/s)
Pump$: pump model string identifier

Outputs:
m_dot: mass flow rate (kg/s or lb_m/hr)
T_out: outlet temperature (K, C, F, or R)
W_dot: power (W, kW or Btu/hr)
eta_p: actual efficiency relative to power
eta_v: volumetric efficiency"

Example 1:
$UnitSystem SI Mass kJ C kPa
F$='DowTherm_J'
C=0 [%]
T_in=300 [K]
P_in=100000 [Pa]
P_out=500000 [Pa]
N=1700 [1/min]*convert(1/min,1/s)
Pump$='Albany 05H'
Call GearPump2_CL(F$, C, T_in, P_in, P_out, N, Pump$: m_dot, T_out, W_dot, eta_p, eta_v)

{Solution:
eta_p = 0.4943
eta_v = 0.9485
m_dot = 0.240 [kg/s]
T_out = 25.25 [C]
W_dot = 0.2242 [kW]
}

Example 2:
$UnitSystem SI Mass kJ C kPa
F$='EG'
C=20 [%]
T_in=25 [C]
P_in=100 [kPa]
P_out=500 [kPa]
N=1700 [1/min]*convert(1/min,1/s)
Pump$='Albany 05H'
Call GearPump2_CL(F$, C, T_in, P_in, P_out, N, Pump$: m_dot, T_out, W_dot, eta_p, eta_v)

{Solution:
eta_p = 0.4964
eta_v = 0.9526
m_dot = 0.2397 [kg/s]
T_out = 25.2 [C]
W_dot = 0.2242 [kW]
}

See also: GearPump1_CL

Index