Sizing the Condensate Receiver/Reservoir
When selecting the receiver/reservoir for the
PowerTrap, select from among the following 3 conditions:
①
When large quantities of flash steam are involved
(For open systems using steam)
a) Determining the amount of flash steam:
Amount of flash steam Fs = Q x (hd’ - hh’) / r
Fs : amount of flash steam (kg/h) (lb/h)
Q : amount of condensate (kg/h) (lb/h)
hd’ : specific enthalpy (kJ/kg) (Btu/lb) of saturated condensate at
condensate inlet set pressure (Pi)
hh’ : specific enthalpy (kJ/kg) (Btu/lb) of saturated condensate at
condensate receiver set pressure (Ph)
r : specific enthalpy (kJ/kg) (Btu/lb) vaporization (latent heat of
steam) at condensate receiver set pressure (Ph)
b) Determine the vent pipe diameter according to the amount of flash steam in Vented
Receiver Table - 1 shown on the next page.
c) Determine the overflow pipe diameter (D
op
, refer to the figure below).
NOTE: The overflow pipe diameter should be at least as large as the condensate inlet pipe
diameter (D
cip
, refer to the figure below).
d) Determine the minimum condensate receiver diameter (D
cr
, refer to the figure below) by
selecting the largest value among those from (i), (ii), and (iii) based on a condensate receiver
length of 1 m (3.3 ft).
( i ) is the overflow pipe diameter multiplied by 3 or more.
( ii ) is the minimum receiver diameter according to the amount of flash steam in Vented
Receiver Table - 1 shown on the next page.
(iii) is the minimum receiver diameter according to the amount of condensate in Vented
Receiver Table - 2 shown on the next page.
NOTE: Receiver length can be reduced by 50% when the motive pressure (Pm) divided by the
back pressure (P
b
) is "2" or greater. (When Pm ÷ P
b
≥
2)
Pi
Qi
Ph
Flash Steam
Condensate
Receiver
×
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English
Summary of Contents for PowerTrap GP14-B
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