| 单词 | tog value |
| 释义 | > as lemmastog value 3. A unit of thermal resistance used to express the insulating properties of clothes and quilts (see quots. 1945, 1978); so tog rating, tog value. [Modelled on the earlier U.S. term clo.] ΘΚΠ the world > matter > properties of materials > temperature > heat > [noun] > measurement of heat > unit of thermal resistance tog1945 1945 Peirce & Rees in Shirley Inst. Mem. XIX. 343 So that practical clothing may be described conveniently by a range of small integers, the unit of thermal resistance, to be called the ‘tog’, is the resistance that will maintain a temperature difference of 0·1°C. with a flux of 1 watt per square metre, or in more practical terms, 10°C. with a flux of 1 watt per square decimetre. This is the resistance of a light summer suit, and 10 togs represents about the thickest clothing..practicable to wear. 1975 Daily Tel. 9 Dec. 13/4 White goose down: 10·5 togs (which means that it is extra-warm and light)... Terylene P.3: 8·5 to 9 togs (normal warmth). The heaviest quilt, I am told, gives the same tog warmth as five blankets at less than half the weight. 1977 Observer 25 Sept. (Colour Suppl.) 60/1 (advt.) Genuine continental quilt luxury at bargain prices: Tog rating (warmth factor) 9·5+. 1978 Textiles VII. ii. 50/2 The tog value of a textile is equal to ten times the temperature difference between its two faces when the flow of heat is equal to one watt per square metre. One tog is the thermal resistance of a fabric for a conventional man's suiting or of a blanket of medium quality. < as lemmas |
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