How can you increase the rate of heat transfer?

If the temperature difference on opposite sides of the material through which heat is transferred is increased by a factor of 2, then the rate of heat transfer is increased by a factor of 2.

How do you increase heat transfer in heat exchanger?

Compact heat exchangers use several enhancement techniques such as offset strip fins, lanced fins, perforated fins, and corrugated fins. Heat transfer coefficients are several hundred percent above the smooth-tube values; however, the pressure drop is also substantially increased.

What factors would increase the rate of heat transfer q of an exchanger?

Here are the factors that affect the rate of conduction:

• Temperature difference. The greater the difference in temperature between the two ends of the bar, the greater the rate of thermal energy transfer, so more heat is transferred.
• Cross-sectional area.
• Length (distance heat must travel).
• Time.

How do you increase overall heat transfer coefficient in heat exchanger?

Increasing heat exchanger performance usually means transferring more duty or operating the exchanger at a closer temperature approach. This can be accomplished without a dramatic increase in surface area. This constraint directly translates to increasing the overall heat transfer coefficient, U.

What factors that affect the heat transfer rates of evaporators and condensers?

The overall heat transfer coefficients were affected mainly by temperature difference between the liquid evaporating and the steam condensing temperatures, evaporating temperature, irrigation density, liquid viscosity, and the heating tube length, but the Prandtl number was also significant.

How does heat transfer coefficient increase tube side?

The shell side heat transfer coefficient is improved by providing baffles on the shell side and creating cross flow of shell side fluid with respect to the tube bundle. The commonly used baffle is the segmental baffle.

Does heat transfer coefficient increase with temperature?

As the position x increases, the thickness of the thermal boundary layer increases, i.e. the temperature increases over a greater distance y. Thus, the temperature gradient decreases in the x-direction and so does the local heat transfer coefficient.