172-65637MA-05 (GP5C PowerTrap) 8 Jun 2020
14
Sizing the Condensate Receiver
When selecting the receiver for the GP5C, select from among the following steps:
(1) Determine the amount of flash steam
(There may be a case that the flash steam hardly
generates when the cold condensate is being pumped):
Amount of flash steam Fs = Q
(hd’
hh’)/r
Fs : amount of flash steam (kg/h) (lb/h)
Qi
: 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)
(2) Determine the vent pipe diameter according to the amount of flash steam in Vented
Receiver Table - 1 shown on the next page.
(3) 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).
(4) 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 (P
m
) divided by the back pressure (P
b
) is "2" or greater.
(When P
m
P
b
2)
ドレンヘッダー
D
op
Overflow
Pipe
Condensate
Receiver
Condensate
Inlet Pipe
D
cr
3 D
op
D
cr
D
cip
D
op
≥ D
cip
Receiver
Pi
Ph
Flash Steam
Condensate
Qi
