Electric Heat Exchanger Calculation

Approximations may be necessary.

Electric heat exchanger calculation.

The value of t 2 variation will be used in the basic equation a q u t. For heat transfer from the outside calculate the area exposed to the atmosphere except for the top of the control panel. The lmdt is the logarithmic average of the temperature differences at each end of the heat exchanger. Determine the heat generated inside the enclosure.

As you calculate the required surface area of the heat transfer device you see where each t value is used. Heat transfer coefficient in kw c m 2 that is specific to each type of equipment and given by the manufacturer. The amount of heat given is equal to the amount of heat taken. To solve the basic equation a q u t you must first determine the value of.

For example suppose the final solution temperature is 140f and the temperature of the steam at 10 psi is 239f. T 2 239 140 99f. For example if you know the power generated inside the unit assume 10 of the energy is dissipated as heat. If two objects having different temperatures are in contact heat transfer starts between them.

Download the excel spreadsheet templates in this article to make preliminary heat exchanger design calculations. Calculate the required heat transfer area based on values needed. 800 832 9375 or 516 832 9300 fax. Exergy llc 320 endo boulevard garden city ny 11530 phone.

In an isolated system given heat is always equal to taken heat or heat change in the system is equal to zero. These templates use s i.