Air To Water Heat Exchanger Design Calculations

Consider a parallel flow heat exchanger which is used to cool oil from 70 c to 40 c using water available at 30 c.

Air to water heat exchanger design calculations. This calculator will help determine which exchanger has enough heat transfer capacity for your system. The term heat exchanger strictly applies to all types of equipment in which heat transfer is promoted from one medium to another. When btu requirement is known most applications. The overall heat transfer coefficient.

The heat exchanger design equation q u a δtlm can be used to determine the required heat transfer area a for a heat exchanger. The heat transfer area can be calculated after values have been determined or estimated for the required heat transfer rate q. 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 overall heat transfer coefficient u and the log mean temperature difference for the heat exchanger δtlm based on the values of several input parameters.

Similarly a steam boiler where combustion gases give up their heat to water in order to achieve. Liquids are considered incompressible. The outlet temperature of the water is 36 c. Fluid temperature ranges from 40 f to 200 f.

Q m h c ph t hin t hout m c c pc t cout t cin where. Only sensible heat transfer occurs. Fluid properties are used at the average temperatures. Acfm is assumed to be at the average air temperature.

Air is assumed to be dry at atmospheric pressure and at zero elevation. Enter the btu requirement temp in temp out and gpm are shaded for hot and cold enter two of the three shaded portions for hot enter two of the three shaded portions for. Air conditioning and refrigeration systems. Fin tube heat exchanger.

They are also used in many other applications i e. Carlson heat exchanger fluid to fluid sizing calculator. Calculation assumes true counter flow. The specific heat of the oil is 2 2 kj kg k.

Heat exchanger calculations with the heat exchanger design equation require a value for the heat transfer rate q which can be calculated from the known flow rate of one of the fluids its heat capacity and the required temperature change. Arkansas state university jonesboro. A domestic radiator where hot water gives up its heat to the ambient air may be described as a heat exchanger. Shell and tube heat exchanger type exchangers are used in many process industries as well as nuclear power stations as condensers steam generators in pressurised water reactor power plants and feed water heaters.

Following is the equation to be used. The rate of flow of oil is 1 kg s. Excel spreadsheet templates for calculating the heat transfer area.