Electric resistance heating devices – Heating devices – Tank or container type liquid heater
Patent
1992-04-01
1994-10-04
Bartis, Anthony
Electric resistance heating devices
Heating devices
Tank or container type liquid heater
126376, 16510434, 165108, 392456, 392496, H04B 102, F28D 1047, F24H 110
Patent
active
053533690
ABSTRACT:
A device for heating chemical tanks includes at least one heat exchanger coil immersed inside a chemical tank. An inert gas, such as nitrogen, is heated and made to flow through the coil to heat a solution in the chemical tank to the desired temperature, which is sensed by a sensor. If microfractures form in the heat exchanger coil, the inert gas simply bubbles out of the solution and does not adversely impact the purity of the solution. In addition, the bubbling of the gas indicates the presence of a microfracture. A second heating coil is provided, and also provides heated inert fluid for heating the solution in the tank. The fluid flow through the first coil is controlled linearly to maintain the temperature at the desired temperature. The fluid flow through the second coil is controlled impulsively to quickly return the solution to the desired temperature after a temperature transient occurs, such as after a relatively cool object is immersed into the solution.
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Falzone Alberto
Musco Giuseppe
Scarpa Cirino
Bartis Anthony
SGS--Thomson Microelectronics S.r.l.
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