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SEPARATING THROTTLING CALORIMETER : PSAW-513TL
To find out dryness fraction of steam by combined separating and throttling calorimeter.
The steam
passing out from separating calorimeter may still contain some water vapour, in
it. in other words it may not be absolutely dry. Again in a throttling
calorimeter steam after passing through the throttle valve superheated or at least
dry saturated. This limits the extent of dryness fraction that can be reliably
measured, depend up on the pressure of steam in the main steam pipe. If a
sample of steam, which may be still wet after passing through the throttle
valve i.e it will not be superheated. Thus under this condition the throttling
calorimeter fails to enable us in determining the value of dryness fraction of steam.
To overcome these difficulties we make use of separating and throttling calorimeter.
First the steam is passed through separating calorimeter where it losses most
of its moisture and becomes comparatively drier, it is than passed through the
throttling calorimeter where super heating takes place without change of total
heat. the temperature and pressure of steam after throttling are measured by
using a thermometer and manometer respectively.
PRODUCT DESCRIPTION
The set up
consist of a separating and throttling calorimeter . a steam generator is
provided at the base of the apparatus . a thermostat knob is provided at the
front of apparatus to control the temperature inside the steam generator .
steam from steam generator is passed from separating calorimeter where most of
the water partical get separated from steam and then passed to throttling
calorimeter where steam get superheated . after that superheated steam passed
through heat exchanger to condense the steam.
SAPARATING CALORIMETER
It consists of
two concentric chambers, the inner chamber, and the outer chamber. This
communicates with each other through an opening at the top. As the steam
discharge through the metal baskets, which has a large number of holes, the
water partial due to their heavier momentum get separated from the steam and
collected in the chamber. The comparatively dry steam in the inner chamber
moves up and then down aging through the annular space between the two chambers
and enters the throttling calorimeter.
THROTTLING CALORIMETER
It consist a
narrow throat. Pressure and temperature are measured by manometer and
thermometer. The steam after throttling process passed through the heat
exchanger and condensate is collected.
UTILITIES REQURIED
·
WATER
SUPPLY 3 lit/min (approx)
·
Drain
·
Electric
supply : 1phase , 220 V A.C , 2Amp.
·
Steam
table for calculation
· Space required : 1.0 m X 1.0 m
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