NPSH: Verskil tussen weergawes
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Lyn 48:
P<sub>1</sub> is die absolute [[druk]] van die tenk en is dus 20 + 81 = 101 kPa(a)
Die dampdruk van water (P<sub>eff</sub>) by die sisteemtemperatuur van 100 °C, is 101.325 kPa<ref>Kyk [http://www.engineeringtoolbox.com/water-vapor-saturation-pressure-d_599.html The Engineering Toolbox: Water Saturation Pressure].</ref>. (Dus gaan P<sub>1</sub> en P<sub>eff</sub> uit kanselleer.)
ΔP<sub>EL</sub> = ρgh = ρg(h<sub>2</sub>-h<sub>1</sub>) = 958.4 × 9.81 × (0.5 - 5.5) = -47010 Pa × (1 kPa/1000Pa) = 47 kPa
Lyn 56:
: <math>NPSH_A = \frac{P_1 - P_{eff} - \Delta P_{EL} - \Delta P_{f}}{9.81 \ SG} = \frac{101 - 101 - (-5) - 2}{9.81 \times 0.9584} = 0.319 \ m</math>
==Pompsisteem waar watervlak onder die pomp lê==
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