An electrical power transformer of diameter 23 0 mm and height 5 00 mm dissipates 1 000 W . It is desired to maintain its surface temperature at 47 ° C by supplying ethylene glycol at 24 ° C through thin-walled tubing of 2 0 − mm diameter welded to the lateral surface of the transformer. All the heat dissipated by the transformer is assumed to be transferred to the ethylene glycol. Assuming the maximum allowable temperature rise of the coolant to be 6 ° C , determine the required coolant flow rate, the total length of tubing, and the coil pitch S between turns of the tubing.
An electrical power transformer of diameter 23 0 mm and height 5 00 mm dissipates 1 000 W . It is desired to maintain its surface temperature at 47 ° C by supplying ethylene glycol at 24 ° C through thin-walled tubing of 2 0 − mm diameter welded to the lateral surface of the transformer. All the heat dissipated by the transformer is assumed to be transferred to the ethylene glycol. Assuming the maximum allowable temperature rise of the coolant to be 6 ° C , determine the required coolant flow rate, the total length of tubing, and the coil pitch S between turns of the tubing.
Solution Summary: The author explains the coolant flow rate, length of tubing, and coil pitch between turns.
An electrical power transformer of diameter
23
0
mm
and height
5
00
mm
dissipates
1
000
W
. It is desired to maintain its surface temperature at
47
°
C
by supplying ethylene glycol at
24
°
C
through thin-walled tubing of
2
0
−
mm
diameter welded to the lateral surface of the transformer. All the heat dissipated by the transformer is assumed to be transferred to the ethylene glycol.
Assuming the maximum allowable temperature rise of the coolant to be
6
°
C
, determine the required coolant flow rate, the total length of tubing, and the coil pitch S between turns of the tubing.
1. A 40 lb. force is applied at point E. There are pins at
A, B, C, D, and F and a roller at A.
a. Draw a FBD of member EFC showing all the known and
unknown forces acting on it.
b. Draw a FBD of member ABF showing all the known and
unknown forces acting on it.
c. Draw a FBD of member BCD showing all the known and
unknown forces acting on it.
d. Draw a FBD of the entire assembly ADE showing all the
known and unknown forces acting on it.
e. Determine the reactions at A and D.
f. Determine the magnitude of the pin reaction at C.
40 lbs.
B
A
6 in.
4 in.
D
F
-5 in.4 in 4.
A crude oil of specific gravity0.85 flows upward at a volumetric rate of flow of 70litres per
second through
a vertical
venturimeter,with an inlet diameter of 250 mm and a throat
diameter of 150mm. The coefficient
of discharge of venturimeter is 0.96. The vertical
differences betwecen the pressure toppings is
350mm.
i)
Draw a well labeled diagram to represent the above in formation
i)
If the two pressure gauges are connected at the tapings such that they are
positioned at the levels of their corresponding tapping points,
determine the
difference of readings in N/CM² of the two pressure gauges
ii)
If a mercury differential
manometer
is connected in place of pressure gauges,
to the tappings such that the connecting tube up to mercury are filled with oil
determine the difference in the level of mercury column.
Can you solve it analytically using laplace transforms and with Matlab code as well please. Thank You
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