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Title: Feedback regulated induction heater for a flowing fluid

Abstract

A regulated induction heater for heating a stream of flowing fluid to a predetermined desired temperature. The heater includes a radiofrequency induction coil which surrounds a glass tube through which the fluid flows. A heating element consisting of a bundle of approximately 200 stainless steel capillary tubes located within the glass tube couples the output of the induction coil to the fluid. The temperature of the fluid downstream from the heating element is sensed with a platinum resistance thermometer, the output of which is applied to an adjustable proportional and integral feedback control circuit which regulates the power applied to the induction coil. The heater regulates the fluid temperature to within 0.005.degree. C. at a flow rate of 50 cm.sup.3 /second with a response time of less than 0.1 second, and can accommodate changes in heat load up to 1500 watts.

Inventors:
 [1];  [2]
  1. (Santa Fe, NM)
  2. (Los Alamos, NM)
Issue Date:
Research Org.:
Los Alamos National Laboratory (LANL), Los Alamos, NM
OSTI Identifier:
865716
Patent Number(s):
4560849
Assignee:
United States of America as represented by United States (Washington, DC) LANL
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
feedback; regulated; induction; heater; flowing; fluid; heating; stream; predetermined; desired; temperature; radiofrequency; coil; surrounds; glass; tube; flows; element; consisting; bundle; approximately; 200; stainless; steel; capillary; tubes; located; couples; output; downstream; sensed; platinum; resistance; thermometer; applied; adjustable; proportional; integral; control; circuit; regulates; power; 005; degree; flow; rate; 50; cm; response; time; accommodate; changes; heat; load; 1500; watts; capillary tubes; flowing fluid; heat load; induction coil; heating element; control circuit; capillary tube; flow rate; stainless steel; fluid flow; response time; feedback control; fluid flows; glass tube; desired temperature; resistance thermometer; fluid temperature; predetermined desired; power applied; regulated induction; induction heater; platinum resistance; /219/392/

Citation Formats

Migliori, Albert, and Swift, Gregory W. Feedback regulated induction heater for a flowing fluid. United States: N. p., 1985. Web.
Migliori, Albert, & Swift, Gregory W. Feedback regulated induction heater for a flowing fluid. United States.
Migliori, Albert, and Swift, Gregory W. Tue . "Feedback regulated induction heater for a flowing fluid". United States. https://www.osti.gov/servlets/purl/865716.
@article{osti_865716,
title = {Feedback regulated induction heater for a flowing fluid},
author = {Migliori, Albert and Swift, Gregory W.},
abstractNote = {A regulated induction heater for heating a stream of flowing fluid to a predetermined desired temperature. The heater includes a radiofrequency induction coil which surrounds a glass tube through which the fluid flows. A heating element consisting of a bundle of approximately 200 stainless steel capillary tubes located within the glass tube couples the output of the induction coil to the fluid. The temperature of the fluid downstream from the heating element is sensed with a platinum resistance thermometer, the output of which is applied to an adjustable proportional and integral feedback control circuit which regulates the power applied to the induction coil. The heater regulates the fluid temperature to within 0.005.degree. C. at a flow rate of 50 cm.sup.3 /second with a response time of less than 0.1 second, and can accommodate changes in heat load up to 1500 watts.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

Patent:

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