Air To Water Heat Exchanger Calculations

The overall heat transfer coefficient.

Air to water heat exchanger calculations. Air is assumed to be dry at atmospheric pressure and at zero elevation. Fluid properties are used at the average temperatures. Acfm is assumed to be at the average air temperature. Heat exchanger analysis heat exchanger calculation.

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. The specific heat of the oil is 2 2 kj kg k. In the analysis of heat exchangers it is often convenient to work with an overall heat transfer coefficient known as a u factor the u factor is defined by an expression analogous to newton s law of cooling.

Powertech manufactures and exports heat exchanger calculation air to air heat exchanger water heat exchanger heat exchange unit stainless steel heat exchanger water to air heat exchanger finned tube heat exchanger tube heat exchanger tube in tube heat exchanger plate heat exchanger design shell and tube heat exchanger design tube and shell heat exchanger heat exchange system. Cooling of air or flue gas. Following is the equation to be used. The outlet temperature of the water is 36 c.

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. 350 500. Condensation of organic vapors. Only sensible heat transfer occurs.

Since your problem is associated with compact water to air heat exchanger the primary estimation is focused on the estimation of heat transfer coefficient for the fluid flowing inside the tube. Condensation of low pressure steam. Q mh cph thin thout mc cpc tcout tcin where. 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.

Calculation of heat exchanger. Calculation assumes true counter flow. Consider a parallel flow heat exchanger which is used to cool oil from 70 c to 40 c using water available at 30 c. Heat exchangers are commonly used in industry and proper design of a heat exchanger depends on many variables.

For example we use a heat exchanger in refrigerator gas by cold water or air in a refrigeration system. Fluid temperature ranges from 40 f to 200 f. Cooling of liquid light hydrocarbons. 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.

A heat exchanger uses to exchange heat or heat energy from one medium to another. Cooling of hydrocarbon gas. This medium may be heat transfer from liquid to liquid liquid to gas or gas to liquid and this will depend on application and requirements.