28 tons of ice from and at 0oC is produced per day in an ammonia refrigerator.
The temperature range in the compressor is from 25 0 C to -150 C. The vapour is
dry and saturated at the end of compression and an expansion valve is used.
Assuming a coeffi
Mechanical Power Transmission
The purpose of mechanical power transmission systems is to transmit force and motion
from one point in a machine to another.
Rotational power is transmitted by means of drive shafts, belt drives, and chain drives.
In some cas
POWER TRANSMISSION SHAFTING
It consists of the determination of the correct shaft diameter to ensure satisfactory
strength and rigidity when the shaft is transmitting power under various operating and
loading conditions. Shafts are usually c
Q. 1. Classify hydraulic pumps.
Ans. Pumps may bi placed in one of the two general categories.
(i) Dynamic pressure pumps: centrifugal pump, jet pump, propeller, and turbine.
(ii) Positive, displacement pump: Piston plunger, gear, lab, vane, screw etc.
Minim s e for s
um pe d
tarting a ce
When a centrifugal pump is started , Will start delivering liquid only if the pressure rise
in the impeller is more than or equal to the manometric head (H mano). In other words,
centrifugal head flow
Rotational or Angular Motion
A force acting perpendicular to a pivoted lever, Fig A.11, causes
a turning effect or torque at the fulcrum.The torque is the
product of the force and the