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2、insulation Physical quantities and definition ( . ). (en). (NEQ). 6 , . () . , , 2015 , 331602014 III , , ISO 7345:1987 Thermal insulation Physical quantities and definitions ( . ). . 23 2009 . 261- , . 331602014 1 Thermal insulation. Physical quantities and definitions 2015 07 01 1 , , , . 2 , , ,
3、, , 1. *. 1 1.1 , 1.1.1 ; (quantity of heat): , , . : 1 . 2 , Q : , , , , . . Q 1.1.2 (heat flow rate): , , , . . Q 1.1.3 (density of heat flow rate): , , , . . , (, ). q /2 1.2 , 1.2.1 : , . m 1.2.2 : w /3 331602014 2 1 1.2.3 : , , , , . g /(2c) 1.3 1.3.1 (thermal conductivity): , , 1 /. : 1 . 2. ,
4、 , , , . /(K) /() 1.3.2 (density): /3 1.3.3 (heat capacity): , 1 C () /K 1.3.4 (specific heat capacity): , . , , 1 (). /(K) /() 1.3.5 : , . , , /3. c /( 3K) /( 3) 1.3.6 (thermal diffusivity): , , . : 1 , . 2 , , , () , . 3 , , , , /( .). 4 1 (/3)/=/4. 5 , . a 2/ 1.3.7 (thermal effusivity): , , : 1 .
5、 2 , . . b . b /(2K1/2) 331602014 3 1 1.3.8 : , /2, , , , . : 1 , . . 2 s, /(2.), , , . , /(.), , /(), , /3, 2. , . 3 s, . n , s , n. s /(2K) /(2) 1.3.9 ( ): , , ; . w / % 1.3.10 ( ): , , , . , 1000. v 3/3 % 1.3.11 : , , - , , , . . /( ) 1.3.12 : , , - . /(.(/) 1.3.13 : , , . 1.3.14 : , , - . /( ) 1.3.15 : , , 1 2 , , , 1 /. . i /(.)* 331602014 4 1 1.4 1.4.1 (thermal resistance): , , . : 1 , , . 2 , , , , , /(.). 3 , , , , . 4 , , , . , (). 5 , , , , . R (2K)/ (2)/ 1.4.2 : , . /(2K) /(2) 1.4.3 : , , , , 1 (). /(2K) /(2) 1.4.4 : , , , 1 (). /(2K) /(2) 1.4.5 : , , , , / 1 (
