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THERMAL CONDUCTIVITYMEASUREMENT METHODS withPOLYSTYRENE as HEAT FLUX METER

LECTURE : MR. DIMAS FIRMANDA


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GROUP 1

ROISUL AMINAHMAD DIYANAL ARIFINLESTARI SITINJAK

LISA NORMALASARIDEIVY AMALIA TIPDANITRIAS NOVITASARI

MUHAMMAD BAGUS ARDIWIYATNATIARA WIRANTIMUTIARA KUSUMANINGTYAS

www.themegallery.com

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Tandan kosongkelapa sawit

Kaya serat,selulosa

23% dari jumlah

tandan sawitsegar

BISADIMANFAATKANSEBAGAI BAHAN

ISOLASI

Introduction


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BASIC THEORYwww.themegallery.com

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CONDUCTION

CONVECTION

RADIATION

WITH THERMALCONDUCTIVITY


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CONDUCTION

Conduction is the process of heat transfer or calor thatoccurs going from onemolecule to another molecule,without the transfer of

molecules of an object. Heatconduction can only occur inan object if there are parts of it that are not located at thesame temperature, and flowdirection of the point where

the temperature is alwayshigher to the point where thetemperature is lower(Zemansky, 1982).


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FOURIERS LAW

Fourier's law said that the heat transfer of calor with conduction system have been toldby:

1. Thermal Gradient in the x-direction isexpressed by, dT / dx.

2. Extensive heat transfer direction normalto the direction of heat flow, A.


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THE FORMULA OF FOURIERS LAW

Fouriers Law:

Where:

Qx = heat transfer( Watt ),k = thermal conductivity, characteristicsof material (W/m.C),A = luas penampang yang tegak lurus

denga arah laju perpindahan kalor (m 2 )dT/dx = temperatur gradient in line x(C/m),


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THERMAL CONDUCTIVITY

Thermal conductivity () is the intrinsic propertyof a material which relates its ability to conductheat. Heat transfer by conduction involvestransfer of energy within a material without anymotion of the material as a whole. Conductiontakes place when a temperature gradient existsin a solid (or stationary fluid) medium.

Thermal Conductivity = heat distance /

(area temperature gradient)

= Q L / ( A T )


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THERMAL CONDUCTIVITY TABLE

Material Thermal ConductivityW/m, oK Thermal Conductivity(cal/sec)/(cm 2 , oC/cm)

Air at 0 C 0.024 0.000057

Aluminum 205.0 0.50

Brass 109.0 -

Concrete 0.8 0.002

Copper 385.0 0.99

Glass, ordinary 0.8 0.0025

Gold 310 -

Ice 1.6 0.005

Iron - 0.163

Lead 34.7 0.083

Polyethylene HD 0.5 -

Polystyrene expanded 0.03 -

Silver 406.0 1.01

Styrofoam 0.01 -

Steel 50.2 -

Water at 20 C - 0.0014

Wood 0.12-0.04 0.0001


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FORMULA USED ON JOURNALwww.themegallery.com

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METHODS

Heater, polistiren, plat aluminium,termokopel, timbangan,sumber listrik,mistar, ayakan, dan tandan kosong sawit.


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CONCLUSION

1. Harga konduktivitas tandan kosong sawit padadensitas bulk 0, 2728 gr/cm3 berkisar antara0,07686597 - 0,10275511 W/Mk

2. Harga tahanan termal tandan kosong sawit

pada desitas bulk 0, 2728 gr/cm3 berkisar antara2,392343586 - 3,868327764 hr ft2 F/btu

3. Nilai perkalian perbedaan temperatur dan ketebalanbahan insulasi untuk tandan kosong sawit

adalah 18,36 - 48,11976 in F

4. Tandan kosong sawit dapat digunakan sebagai bahaninsulasi bangunan karena memenuhi kisaranbahan insulasi yaitu 0,052 - 0,130 W/mK


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TERIMA KASIH

DankeMerci

Thank youMauliateMatur Nuwun

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