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Interesting Report on Radiant Heating l'HE Joint Research Committee .

21st December 1945
Page 22
Page 22, 21st December 1945 — Interesting Report on Radiant Heating l'HE Joint Research Committee .
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Which of the following most accurately describes the problem?

of the Gas Research Board, 1, Grosvenor Place, 'London, S.W.I, has published a first report on radiant heating (GRB 15). The work described in the report was primarily directed towards a study of the mechanism of heating by radiation, with the particular object of establishing whether the quality (i.e., the distribution of the radiant energy with respect to wavelength) of the radiation used was of significance in industrial processes in general.

The question is of special importance, (a) because the radiation emitted by most gas-heated sources is essentially of longer wavelengths than that from electric tungsten-filament lamps; (b) because in certain industrial processes, such as the drying of paints by radiant heating, claims have been made that short-wave radiation is More advantageous, and it was considered desirable to cheek such claims.

. In general sections it is pointed out• that, in the Majority of the applications of radiant heating so far examined, the opacity of the materials concerned must result in surface absorption of the incident radiation, irrespective of the wave-' lengths employed. In this respect, therefore, the quality of the radiation is of no consequence, and whether electric or gas-heated sources be preferable is largely a question of which will provide greater intensity for lower capital and running costs. In certain cases, however, where the materials are appreciably transparent, the use • of longer wave-lengths is generally favoured.

The booklet comprises 52 pages, and should be read by all those interested in this important subject.


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