Test Methodology for Infrared Tubular Heaters. Topical Report June 1984-September 1985

摘要

The current ANSI standard (Z83.6-1982) for determination of the total infrared heat output of commercial space heaters is not broad enough to encompass all of the equipment currently in the marketplace. For example, long straight or U-shaped tubular heaters cannot be evaluated under the spherical grid specified by the standard. The grid size is simply too large for practical use. To extend the procedure to others heaters, a literature survey and a laboratory evaluation were performed. Current test procedures and equipment used to measure infrared heat rates were evaluated. A procedure was developed to measure total radiant output based on the use of a 180-degree view angle radiometer and a cylindrical grid surrounding the heater. The procedure was tested in the laboratory and found to perform satisfactorily. A total radiant output of 40,500 Btu/h emanating from a straight tube heater operating at 104,000 Btu/h was measured. In order to proceed to develop a measurement standard, several parameters must be carefully assessed and defined: radiometer window material, need for radiometer water cooling, calibration techniques, and background measurements.