Теплоізоляція. Фізичні величини та визначення понять

1 2 4

0 1 2 З? 4 5

—? —? —? 57 *

—? —? —? ISO 9251, ISO 9346, ISO 9288, ISO 31/4, ISO 9229,

THERMAL INSULATIONPhysical quantities and definitions
0 ISO 7345 Thermal insulation — Physical quantities and definitions •
ISO 9251 Thermal insulation — Heat transfer conditions and properties of materials — Vocabulary
ISO 9346 Thermal insulation — Mass transfer — Physical quantities and definitions
ISO 9229 Thermal insulation — Thermal insulating materials and products — Vocabulary 1 *
ISO 9288 Thermal insulation — Heat transfer by radiation — Physical quantities and definitions 1 *

ISO 7345 ISO 9251 ISO 9346 ISO 9229 ISO 9288 1 2

2.3 dtp
di
2.5 q - -X grad 7.
2.6 grad 7 = -r q .
( q
X

2.8 " h- q h

2.12

( 2.13 2.14 dQ
dT

(J/(kg-K)) 2.15.1 X b ~ (J/(m 2 -K s 1/2 ))

3.1 F =-?-
' V&T'
s sisecdcvrc
A.O grad (1)
gradT = -r-q.
(4)

grad 7 = -[ q = -Xgrad7; (6)

q = —X grad X X (8) (9)

R = U £?' = |n-L = r— In—, (11)
area 4.6
areal coefficient of heat loss 3.2
breadth 4.5
Celsius temperature 4.2
density 4.11
density of heat flow rate 2.3
diameter 4.8
heat 2.1
heat capacity 2.14
heat flow rate 2.2
length 4.4
linear density of heat flow rate 2.4
linear thermal conductance 2.11
linear thermal resistance 2.8
linear thermal transmittance 2.13
mass 4.10
quantity of heat 2.1
specific heat capacity 2.15

specific heat capacity at constant pressure 2.15.1
specific heat capacity at constant volume 2.15.2
surface coefficient of heat transfer 2.9
thermal conductance 2.10
thermal conductivity 2.5
thermal diffusivity 2.16
thermal effusivity 2.17
thermal resistance 2.7
thermal resistivity 2.6
thermal transmittance 2.12
thermodynamic temperature 4.1
thickness 4.3
time 4.9
ventilation rate 3.3
volume 4.7
volume coefficient of heat loss 3.1
width 4.5