Heat Transfer Surface Area. Basic heat transfer can also be calculated using specific heat mass and temperature differentials. Heat leaves the warmer body or the hottest fluid as long as there is a temperature difference and will be transferred to the cold medium.
The basic component of a heat exchanger can be viewed as a tube with one fluid running through it and another fluid flowing by on the outside. Heat transfer and fluid flow the following equations and data may be useful. A more useful quantity to work with is the heat transfer per unit area defined as q a q.
This added performance results in higher pressure drop.
In this case the total heat transfer rate is evaluated through a concept of total surface effectiveness or surface efficiency η o defined as.