揚程(又稱為水頭(hydraulic head)或落差),是單位重量液體通過所獲得的能量。泵的水頭包括吸程在內,近似為泵出口和入口壓力差。

水頭用H表示,單位為米(m)。泵的壓力用P表示,單位為MPa(兆帕)

H=P/(ρg)

如P為1 kg/cm2,ρ(水)為1000 kg/m3

則H=(1 kg/cm2)/(1000 kg/m3)

H=(1 kg/cm2)/(1000 kg/m3)=(10000 kg/m2)/(1000 kg/m3)=10 m

1 MPa=10 kg/cm2

得H=(P2-P1)/(ρg) =ΔP/(ρg)

(P2=出口壓力P1=進口壓力ΔP=壓力差)

參見

Template:Aquiferproperties

註釋

Wikiwand in your browser!

Seamless Wikipedia browsing. On steroids.

Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.

Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.