Water To Air Heat Exchanger Calculations

Air is assumed to be dry at atmospheric pressure and at zero elevation.

Water to air heat exchanger calculations.

The velocity of the methanol flow through the tubes is 0 8 m s w. 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. H c heat transfer coefficient kcal m 2 h c v relative speed between object surface and air m s since. 1 sweat inlet outlet connections are standard on all models.

The water flow is cooled from 100 to 45 c. Geothermal heating and cooling. Go bigger not smaller. Sizing of the unit required for the application if there is no space restriction can be determined by the use of either the theoretical heat.

A tube bundle of the heat exchanger contains 111 tubes the diameter of one tube is 25x2 5 mm. Many other applications utilizing liquid to air or air to liquid transfer. Calculate the required heat transfer area based on values needed. H c 10 45 v 10 v 1 2 2 where.

Fluid properties are used at the average temperatures. H 2 enthalpy in outside make up air after the heat exchanger kj kg btu lb h 3 enthalpy in outlet air before the heat exchanger kj kg btu lb enthalpy of moist air. Heat exchanger efficiency calculator. Liquid cooling by air to water or liquid transfer applications.

I agree with leaddog don t go small i have a 75 000 btu furnace with a 20 x20 exchanger which i think it is capable of 100 000 btu s if i m not mistaken. Calculation assumes true counter flow. Heat recovery app free apps for offline use on mobile devices. Have no problems with a c due to air flow and very nice heat.

A single pass shell and tube heat exchanger heats methanol with water from the initial temperature of 20 to 45 c. Related mobile apps from the engineering toolbox. Garage and out building heat. The model numbers shown in the calculator are only a partial listing of our standard products.

Convective heat transfer coefficient for air. 1 kcal m 2 h c 1 16 w m 2 c 2 can be modified to. Only sensible heat transfer occurs. Acfm is assumed to be at the average air temperature.

Download the excel spreadsheet templates in this article to make preliminary heat exchanger design calculations. Air cooled heat exchanger sizing does preliminary estimation of finned area plot size total fan power and air outlet temperature checalc chemical engineering calculations to assist process plant operation and maintenance engineers. The convective heat transfer coefficient for air flow can be approximated to. Fluid temperature ranges from 40 f to 200 f.

Heat exchanger calculator the heat exchanger calculator is a program specially designed to predict the performance of the heat exchanger model number you choose based on the parameters you input.