ISSN Online: 2688-7231
ISBN Flash Drive: 978-1-56700-497-7
ISBN Online: 978-1-56700-496-0
Proceedings of the 25th National and 3rd International ISHMT-ASTFE Heat and Mass Transfer Conference (IHMTC-2019)
Numerical Modelling of Induction Heated Thermal Valve of Vitrification Melters
要約
In this research work, experimental and numerical studies on
induction heated thermal valve (also called as freeze valve)
have been carried out for optimizing the operational
parameters and safe operation of thermal valve under
different operating conditions. Thermal valve section is the
bottom most part of the melter and it is used for pouring of
vitrified waste into the SS canisters. Numerical analysis of
the thermal valve has been carried out using COMSOL
Multiphysics software and simulation results were validated
with the experimental results of test conducted on thermal
valve. Experimental results were obtained by heating the
thermal valve pipe under varying input voltage condition
applied to induction coil and temperatures at different
elevation of thermal pipe were recorded using N-type
thermocouple. Using this validated numerical model,
induction heating characteristics of thermal valve have been
analysed by carrying out parametric studies under different
input voltage conditions like, voltage applied to upper coil
alone, voltage applied to lower coil alone and combinations
of voltage applied to both upper and lower coil. Based on this
study, available time margin between operating temperature
and trip temperature of thermal valve for different input
voltages have been evaluated.