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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
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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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