What is Conduction? Conduction formula with Example Sums

What is Conduction?

The process of transferring energy from one particle of a medium to another by the particles being in direct contact with each other

An area of ​​higher kinetic energy transfers heat energy to an area of ​​lower kinetic energy. Faster particles collide with slower moving particles,

As a result, slow speed particles increase their kinetic energy.

It is a common form of heat transfer and takes place through physical contact. Conduction is also known as heat conduction or heat conduction.

Conduction Formula :

Conduction Equation is the transfer of heat per unit time Q(Kj) in kilojoule is eqvalt to the  product of thermal conductivity of the body K(wm-1 k)  in watts per meter-1 kilo and multiply the area of heat transfer  A(m) in meter and multiply the is the temperature of the hot region Thot(0c ) in degree Celsius and minus is the temperature of the cold region Tcold(0c ) in degree Celsius and divided by the thickness of the body d. Hence  the conduction formula can be written as

Q(Kj)=[K(wm-1 k)   *A(m) (Thot(0c )-Tcold(0c ))]/d

Q→ transfer of heat per unit time in Kj

K→ thermal conductivity of the body in wm-1 k

A→ area of heat transfer in meter2

Thot→ temperature of the hot region in 0c

Tcold→ temperature of the cold region in 0c

D→ thickness of the body

Example:

Calculate the conductivity 50 wm-1 k  and Area 0.20 and  temperature of the hot in0.80 0c and temperature of the gold 0.30 0c and thickness of the body 0.48 and Find the Transfer heat value?

Answer:

K=50 wm-1 k

A=0.20 m2

Thot=0.80 0c

Tcold=0.30 0c

D=0.48

Q(Kj)=[K(wm-1 k)   *A(m) (Thot(0c )-Tcold(0c ))]/d

Q=50*0.20(0.80-0.30)/0.48

Q=5/0.48

Q=10.41Kj

The heat Transfer Q=10.41Kilo per joules

Example:2

Calculate the conductivity 100 wm-1 k  and Area 50 and  temperature of the hot in200 0c and temperature of the gold 50 0c and thickness of the body 400 and Find the Transfer heat value?

Answer:

K=100 wm-1 k

A=50 m2

Thot=200 0c

Tcold=50 0c

D=400

Q(Kj)=[K(wm-1 k)   *A(m) (Thot(0c )-Tcold(0c ))]/d

Q=100*50(200-50)/400

Q=750000/400

Q=1875Kj

The heat Transfer Q=1875 Kilo per joules

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