Browse Prior Art Database

Temperature Control System For Bath Heated Tank

IP.com Disclosure Number: IPCOM000048742D
Original Publication Date: 1982-Mar-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 3 page(s) / 34K

Publishing Venue

IBM

Related People

Fontes, M: AUTHOR [+2]

Abstract

In certain processes it is necessary to heat a process fluid indirectly by immersing it in a tank containing a heat transfer fluid. This article teaches a novel approach wherein temperature of both the heat transfer fluid and the temperature of the process fluid are both detected and used to control the heater unit which heats the heat transfer fluid to speed up the heating rate of the process fluid and eliminate the undesirable temperature drift of the process fluid under load transients.

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Temperature Control System For Bath Heated Tank

In certain processes it is necessary to heat a process fluid indirectly by immersing it in a tank containing a heat transfer fluid. This article teaches a novel approach wherein temperature of both the heat transfer fluid and the temperature of the process fluid are both detected and used to control the heater unit which heats the heat transfer fluid to speed up the heating rate of the process fluid and eliminate the undesirable temperature drift of the process fluid under load transients.

The system for accomplishing this is shown schematically in the figure. In the figure there is shown a power controller 10 which supplies power to a series of heaters 11 for heating a tank full of heat transfer fluid 12. This heat transfer fluid normally has a plurality of temperature switches 13 contained therein which drive the power controller 10 so that the heat transfer fluid 12 is maintained at a selected temperature. Contained within the heat transfer fluid is a piping system containing a process fluid 15. This process fluid is indirectly present invention adds a series of temperature switches 16 in the process fluid so that they too may jointly control the power controller 10.

When both fluids are cold, the controller feeds full power to the heaters until the heat transfer fluid temperature exceeds the heatup limit of the temperature switches 13 immersed therein. At this time the power controller would normally shut off and a long period of time would be required for the heat to transfer from the heat transfer fluid into the process fluid. Thus, slow heating of the process fluid would occur. In the present system, however, the temperature switches in the process fluid cause the controller to maintain power on until the process fluid temperature reaches a point belo...