User talk:Shaludube

Heat travels three ways: Heat always travels from an area of higher temperature to an area of lower temperature. Heat transfer (Q) is the flow rate of heat and is measured in Watts or Btu's per hour.
 * Conduction - by spreading through solids.
 * Convection is heat transfer by the movement of heated gasses and liquids.
 * Radiation - is heat in the form of radiation and travels through space at the speed of light.

The basic method for design of heat exchanger is Kern's Method.

Kern’s was based on experimental work on commercial exchanger Advantages: 1. Giving reasonably satisfactory prediction of the heat-transfer coefficient for standard design 2. Simple to apply 3. Accurate enough for preliminary design calculations 4. Accurate enough for designs when uncertainty in other design parameter is such that the use of more elaborate method is not justified Disadvantage: 1. The prediction of pressure drop is less satisfactory, as pressure drop is more affected by leakage and bypassing than heat transfer 2. The method does not take account of the bypass and leakage streams