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Home > Forums > Engineering Forums by Industry > Control Systems engineering > Measurement & control instrumentation engineering Forum

Level measurement of water at supercritical conditionsHelpful Member! 

thread698-90147
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gaharvey (Mechanical)
17 Mar 04 16:41
On a supercritical boiler level of water in the separator is measured by a differential pressure transmitter and compensated by densities of steam and water at subcritical conditions. When the conditions become supercritical what densities do you use and how? The normal level compensation calculation has a denominator of (density of water - density of steam)and since at supercritical conditions there is no destinct water and steam properties, the denominator would be zero. Help!
Helpful Member!  Guidoo (Chemical)
18 Mar 04 7:29
Did I miss something or are you trying to measure level in a drum containing water at supercritical conditions? As you more or less indicate yourself, at supercritical conditions there is no level, the drum will be filled with supercritical fluid (= dense phase).
nbucska (Electrical)
18 Mar 04 12:38
Sense the weight with a strain gauge.

<nbucska@pcperipherals.com>
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