Option 1 : Heat transfer area

ST 1: Reasoning & Mental Ability

7404

15 Questions
15 Marks
15 Mins

__Explanation:__

**Heat flow mainly depends on three factors**

- area of the surface
- temperature difference and
- the convective heat transfer coefficient.

The rate of heat transfer can be increased by enhancing any one of these factors.

- Fins are thus used whenever the available surface area is found insufficient to transfer the required quantity of heat with the available temperature gradient and heat transfer coefficient.
- In the case of fins, the direction of heat transfer by convection is perpendicular to the direction of conduction heat flow.
**Fins are the extended surface protruding from a surface or body, and they are meant for increasing the heat transfer rate between the surface and the surrounding fluid by increasing the heat transfer area.**