Electric Heat Exchanger Calculation

For example if you know the power generated inside the unit assume 10 of the energy is dissipated as heat.

Electric heat exchanger calculation.

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. 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.

Approximations may be necessary. As you calculate the required surface area of the heat transfer device you see where each t value is used. Calculate the required heat transfer area based on values needed. Calculations of heat transfer conservation of energy theorem is also applied to heat transfer.

They will also calculate the number of tubes needed for a shell and tube heat exchanger and to calculate the pipe length needed for a double pipe heat exchanger. For heat transfer from the outside calculate the area exposed to the atmosphere except for the top of the control panel. 800 832 9375 or 516 832 9300 fax. The lmdt is the logarithmic average of the temperature differences at each end of the heat exchanger.

Once lmdt and power have been calculated the heat exchanger calculation can be done as per the following formula. For example suppose the final solution temperature is 140f and the temperature of the steam at 10 psi is 239f. Exergy llc 320 endo boulevard garden city ny 11530 phone. Download the excel spreadsheet templates in this article to make preliminary heat exchanger design calculations.

Heat transfer coefficient in kw c m 2 that is specific to each type of equipment and given by the manufacturer. The value of t 2 variation will be used in the basic equation a q u t.