Solar Thermal Information
48
APPENDIX C: TANK AND PIPING VOLUME
FORMULAS:
This section provides data and formulas for calculating
the volumes of tanks and piping. This is useful for tasks
such as determining the drop in water level of a specific
size storage tank when a given volume of water is
extracted (such as when a drainback system begins the
collection cycle).
Formula C-1 can be used to calculate the volume of a
cylindrical storage tank of known diameter and height:
Formula C-1:
Where:
V
tank
= volume of tank (US gallons)
D = diameter of tank (inches)
H = height of tank (inches)
Formula C-2 can be used to calculate the volume of liquid
of known height h with a cylindrical storage tank of known
diameter and height:
Formula C-2:
Where:
V
fluid
= volume of fluid in tank (U.S. gallons)
D = diameter of tank (inches)
h = height fluid in tank (inches)
PIPE VOLUME DATA:
The following table can be used to calculate the volume
of piping in solar as well as other types of hydronic
systems.
APPENDIX C: Tank and Piping Volume Formulas:
This section provides data and formulas for calculating the volumes of tanks and
piping. This is useful for tasks such as determining the drop in water level of a specific
size storage tank when a given volume of water is extracted (such as when a drainback
system begins the collection cycle).
Formula C-1 can be used to calculate the volume of a cylindrical storage tank of known
diameter and height:
H
h
height of tank
diameter of tank
height of fluid
D
Formula C-1:
V
tank
=
π
D
2
( )
H
924
Where:
V
tank
= volume of tank (US gallons)
D = diameter of tank (inches)
H = height of tank (inches)
Formula C-2 can be used to calculate the volume of liquid of known height h with a
cylindrical storage tank of known diameter and height:
Formula C-2:
V
fluid
=
π
D
2
( )
h
924
APPENDIX C: Tank and Piping Volume Formulas:
This section provides data and formulas for calculating the volumes of tanks and
piping. This is useful for tasks such as determining the drop in water level of a specific
size storage tank when a given volume of water is extracted (such as when a drainback
system begins the collection cycle).
Formula C-1 can be used to calculate the volume of a cylindrical storage tank of known
diameter and height:
H
h
height of tank
diameter of tank
height of fluid
D
Formula C-1:
V
tank
=
π
D
2
( )
H
924
Where:
V
tank
= volume of tank (US gallons)
D = diameter of tank (inches)
H = height of tank (inches)
Formula C-2 can be used to calculate the volume of liquid of known height h with a
cylindrical storage tank of known diameter and height:
Formula C-2:
V
fluid
=
π
D
2
( )
h
924
APPENDIX C: Tank and Piping Volume Formulas:
This section provides data and formulas for calculating the volumes of tanks and
piping. This is useful for tasks such as determining the drop in water level of a specific
size storage tank when a given volume of water is extracted (such as when a drainback
system begins the collection cycle).
Formula C-1 can be used to calculate the volume of a cylindrical storage tank of known
diameter and height:
H
h
height of tank
diameter of tank
height of fluid
D
Formula C-1:
V
tank
=
π
D
2
( )
H
924
Where:
V
tank
= volume of tank (US gallons)
D = diameter of tank (inches)
H = height of tank (inches)
Formula C-2 can be used to calculate the volume of liquid of known height h with a
cylindrical storage tank of known diameter and height:
Formula C-2:
V
fluid
=
π
D
2
( )
h
924
Where:
V
fluid
= volume of fluid in tank (U.S. gallons)
D = diameter of tank (inches)
h = height fluid in tank (inches)
P
ipe Volume Data:
The following table can be used to calculate the volume of piping in solar as well as
other types of hydronic systems.
(Stephanie, this is the same table as appeared in idronics #3 appendix. Perhaps
you can just pull it from the archive.)
Tube type / size
Gallons /foot
3/8" type M copper:
0.008272
1/2" type M copper:
0.0132
3/4" type M copper:
0.0269
1" type M copper:
0.0454
1.25" type M copper:
0.068
1.5" type M copper:
0.095
2" type M copper:
0.165
2.5" type M copper:
0.2543
3" type M copper:
0.3630
3/8" PEX
0.005294
1/2" PEX
0.009609
5/8" PEX
0.01393
3/4" PEX
0.01894
1" PEX
0.03128
1.25" PEX
0.04668
1.5" PEX
0.06516
2" PEX
0.1116
3/8" PEX-AL-PEX
0.00489
1/2" PEX-AL-PEX
0.01038
5/8" PEX-AL-PEX
0.01658
3/4" PEX-AL-PEX
0.02654
1" PEX-AL-PEX
0.04351