The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 26, 1982
Filed:
May. 19, 1980
Hans B Knudsen, Copenhagen, DK;
F. L. Smidth & Co., Cresskill, NJ (US);
Abstract
A method and apparatus for measuring the temperature of hot fluids (1) in environments involving thermal radiation. The apparatus comprises at least one radiation-protected measuring body (4) constituting one end of a heat-tube (2) having a working temperature below the fluid (1) temperaure to be measured. The other end of the heat-tube (10) is connected to one end of a heat-conducting rod (8); the other end of which is kept cool by cooling means (11). The apparatus is equipped with temperature measuring means (12, 14) for measuring the temperature of the heat-tube as well as the temperature at two points along the heat-conducting rod. There can be more than one measuring body. The method comprises: (1) protecting the measuring body against heat transfer by radiation; (2) measuring heat emission to a radiation-protected measuring body; (3) maintaining the radiation-protected measuring body at a substantially constant temperature which is below the temperature of the hot fluid; (4) measuring the temperature of the radiation-protected measuring body; and (5) calculating the temperature of the hot fluid by: (a) dividing the heat emission by the product of the heat transfer coefficient of the heat transfer between the hot fluid and the radiation-protected measuring body by the surface area of the measuring body, and then, (b) adding to that value the temperature of the measuring body. It is unnecessary to heat the measuring body to the temperature of the hot fluid. The method can be applied to measuring the temperature of gases in kilns.