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Step 1: Determine flash ratio
SH: Sensible heat of condensate at high pressure before discharge (kJ/kg)
SL: Sensible heat of condensate at low pressure after discharge (kJ/kg)
H: Latent heat of vaporization of steam at low pressure (kJ/kg)
kJ/kg
Reference: water sensible heat table
kJ/kg
Reference: water sensible heat table
kJ/kg
Reference: vaporization latent heat table
kg/h
Known condensate mass flow
%
(SH - SL) / H x 100
kg/h
Condensate x flash ratio
Step 2: Cross-sectional area
Ms: Flash steam mass flow from step 1
kg/h
kg/m³
From steam table
m/s
Design velocity
m²
Ms / (3600 x Vs)
Step 3: Tank diameter
m²
m
(4 x As / PI)^0.5
Step 4: Height / Diameter = 1.5
m
m
m
Height / Diameter = 1.5