SEPARATING & THROTTLING CALORIMETER WITH BOILER

Product Details 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 must be 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 this difficulties we make use of separating and throttling calorimeter . first the steam is passed through separating calorimeter where it looses most of it’s moisture and becomes comparatively drier. it is than passed through the throttling calorimeter where super heating takes place with out change of total heat . the temperature and pressure of steam after throttling are measured by using a thermometer and manometer respectively.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 particle 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.
PETL729 – SEPARATING & THROTTLING CALORIMETER WITH BOILER
AIM : To find out dryness fraction of steam by combined separating and
throttling calorimeter.
Separating Calorimeter
It consist of two concentric chamber. the inner chamber ,and the outer chamber. which 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 particle due to there 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
passing 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 .Services Required
* Floor space of 2.5 X 1.5m
* 440 V, 15A, 3ph. AC supply with neutral and earthing connection.