Principles Of Thermal Comfort Insulation in Architecture PDF

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Principles Of Thermal Comfort Insulation in Architecture - Study Material...

Description

Principles for insulation

Restrict heat transfer through 

conduction



convection



radiation

Int

Ext

Image by MIT OCW.

Principles for insulation

Three insulation mechanisms 

reflective

Absorptance

Reflectance Image by MIT OCW.

Principles for insulation

Three insulation mechanisms 

reflective



resistive

Aluminum inum Steel Glass

2.5

Concrete Molasse Mortar Plaster Cement block Brick Snow Water Cellular concrete Pine Insulating material 1

10

100 Relative conductivity % air

2 U (W/m k)

2

1.5

1

0.5 0

0

2

4

6

8

10

12 14 16 18

20

22 24

Insulation thickness (cm)

Image by MIT OCW.

1 000

10 000

Principles for insulation

Other characteristics and applicability

Cork

 ☺

 ☺

   : non applicable

☺ : appropriate  : OK but not optimal  : inappropriate because lacks the required performances  : to exclude due to high damage risks

 ☺    

 ☺   ☺      

 ☺ ☺ ☺  

noitalusni esion diloS

Straw and wood fibers

    ☺ ☺ ☺ ☺ ☺ ☺

    

noi tprosba esioN

Wood

☺ 



noitcetorp eriF

Extruded Polystyrene

☺ 

 ☺   ☺ ☺ ☺ ☺  ☺  ☺

noitalusni tcapmoC

Expanded Polystyrene

☺

slenap thgiL

Polyurethane

☺  ☺ ☺    ☺ 

sroolF

Cellular concrete

☺  ☺ ☺    ☺ 

noitalusni detcejnI

Foamglass

        ☺   

slla w neewteb noi talusnI

Cellulose fiber

 ☺   ☺  ☺  ☺

noit alusni detlitneV

Organic fibers

     ☺    ☺  

foor detrevnI

Dense mineral wool

sfoor talf lanoitnevnoC

Material Light mineral wool

ecafrus suoenegomoH

Applications

 ☺

 

    

☺ 

☺ ☺

Principles for insulation

Three insulation mechanisms 

reflective



resistive



capacitive

Interior

Exterior Temperature

Wall

Exterior

Temperature Variation Over 24 hours

8 A.M.

8 A.M. adobe

Interior Temperature

metal 8 A.M.

8 A.M.

Interior

Wall

Exterior

Temperature Variation Over 24 hours

Images by MIT OCW.

Thermal Insulation

Restrict heat transfer Avoid thermal bridges 

Heat flows like water



Heat follows the easiest path (least resistance)

"Isotherms"

Flow lines

Restrict heat transfer Avoid thermal bridges geometry



material

1 16 15 1 50

-10oC

18

2

14oC

-10oC

12 1

50

2

2

1 16 1 5 1

50



50

Thermal Insulation

18

20oC

175 1

32

20oC 20 15

Flux lines 15oC

-10

5

10

0 10oC

-5

Image by MIT OCW.

Thermal Insulation

Restrict heat transfer Avoid thermal bridges 

geometry



material

Simple Simple glazing glazing

Double Double glazing glazing

Insulating Insulating glazing glazing

Double Double window window

Thermal Insulation

Restrict heat transfer Avoid thermal bridges 

geometry



material



thermography

Photograph and thermal image of house removed due to copyright restrictions.

Thermal Insulation

Restrict heat transfer Avoid thermal bridges 50

50

Continuity of insulation

o

16.5 C

-10oC

50

50

o

13 C o

10 C 2 12 2 18 32

1

1 8

175

1

Image by MIT OCW.

insulation outside...