My PrEsEnTaTiON

I'm feeling that I'd done pretty well for my presentation on yesterday evening about heat exchanger. Seriously I never look on my text speech, I can't believe all come spontaneous at that moment. But lil'bit regret coz my topic actually so simple, so it means my contents also not really expands.

Here is some part of my slide presentation...i am juz compress it coz my slides too long



What do you know about heat exchanger??


A heat exchanger is a device built for efficient heat transfer from one fluid to another, whether the fluids are separated by a solid wall so that they never mix or the fluids are not directly contacted.

Objective
1 To enrich knowledge and deliver the information about heat exchanger
2 To know how thermodynamic concept is applied in heat exchanger


Why heat exchanger is needed in our life and in industrial?
For example
In car it's have engine that produce heat that caused temperature to rise. It will make the engine cannot operate in highest efficiency. That why we use radiator.. Other types of heat exchangers are common in everyday equipment such as boilers, furnaces, refrigerators and air conditioning systems.


METHODOLOGY
1 One of flows in the inner pipe and the other in the annular space between two pipes.
2 Heat is transferred from the hot fluid to the cold one thru the wall separating them
3 Sometimes the inner tube makes a couple of turns inside the shell to increase the heat transfer area, and thus the rate of heat transfer.



THEORHY
The first law
The energy can be neither created nor destroyed. It can only change forms.

ENERGY BALANCE
The net change( increase or decrease) in the total energy of the system during a process equal to the difference between the total energy entering and the total energy leaving the system during that process

E in -E out= ∆ E system
since E system=0
thus,


Type of heat exchanger

Shell and tube
-shell and tube heat exchanger which consists of a series of tubes, through which one of the fluids runs. The second fluid runs over the other tubes to be heated or cooled.


plate heat exchanger.
1 It directs flow through tube so that the fluids are separated by plates with very large surface area.
2 more efficient




Usage of heat exchanger in industries.

They are widely used in refrigeration, air conditioning, space heating, power production, and chemical processing. One common example of a heat exchanger is the radiator in a car, in which the hot radiator fluid is cooled by the flow of air over the radiator surface