Proservo NMS5
Hauser
53
Densities
The upper, middle, and bottom densities are calculated by the following formulas.
•
Upper density (Pu) and Density profile
•
Middle density (Pm)
•
Bottom density (Pb)
Draft
The draft varies depending on the shape of the displacer. For cylindrical shape, the draft is
where the variables and constants have the following meanings.
Figure. 57:
Variables and Constants for Displacer
The surface or interface level should be within the cylindrical part of the displacer and approximately in the
middle of its total height.
ρ
u
=
V
W - W
u
ρ
m
=
V
W
u
- W
m
ρ
u
+
ρ
b
=
V
W
m
- W
b
ρ
m
+
D
=
(V
2
- V
1
) / A x 10 + h
=
(V
1
- V
2
- V
3
) / A x 10 + h + h
1
V
1
V
2
h
A
Displacer Balance Volume (69cm
3
)
Displacer Lower Hemisphere Volume
Height of Lower Cone
Cross-section of Displacer
V
1
V
2
h
A
Balance Volume (69 cm
3
)
Volume of Lower Cone (24.46 cm
3
)
Displacer Bottom Stub Height (20 mm)
Cross-section of Displacer (20.26 cm
2
)
For example: standard displacer
Ø50.8 mmCylindrical shape
D = (69 - 24.46 - 0.12) / 20.26 x 10 + 20 + 3
= 44.92
V
3
Displacer Bottom Stub Volume
V
3
Volume of End of Cone (0.12 cm
3
)
h
Height of End of Cone
1
1
d
h
V
2
D
h
1
V
3
Liquid Level or Interface
6 Operation
