Heat exchanger calculations

What is the j-factor in a heat exchanger? How do calculate the heat added? Excel spreadsheet templates for calculating the heat transfer area needed for a heat exchanger are presented and discussed in the next section.

Heat Transfer Calculator. A box will be highlighted yellow if it needs input. The currently calculating value will always be highlighted in green.

The Model Numbers shown in the calculator are only a partial listing of our standard products. Shell and tube heat exchangers are very popular and commonly used heat transfer equipment in the process industry. The conduction calculator deals with the type of heat transfer between substances that are in direct contact with each other. Exchanger Type: Would you like to change how the exchanger is specified? This calculator will help determine which exchanger has enough heat transfer capacity for your system.

Usage: When BTU requirement is known (most applications): - enter the BTU requirement. Temp In, Temp Out, and GPM are shaded for Hot and Cold. Selection of heat exchanger TEMA layout and number of passes.

Specification of tube parameters - size, layout, pitch and material. Setting upper and lower design limits on tube length. The simplest heat exchanger is one for which the hot and cold fluids move in the same or opposite directions in a concentric tube (or double-pipe) construction. In the parallel-flow arrangement of Figure 18.

The heat load of a heat exchanger can be derived from the following two formulas: 1. Conduction as heat transfer takes place if there is a temperature gradient in a solid or stationary fluid medium. With conduction energy transfers from more energetic to less energetic molecules when neighboring molecules collide. For a heat exchanger thermal design calculations spreadsheet, the heat exchanger equation can be used to calculate the required heat exchanger area for known or estimated values of the other three parameters, Q, U, and ΔTlm. Each of those parameters will be discussed briefly in the next three sections.

Performs online calculation for the heat transfer coefficient inside the tube and the pressure drop. To get both is convenient to obtain a compromise between the heat transfer and pressure drop. Describes how counter-flow is different from parallel flow. Calculation of the heat exchanger pressure drop A moving fluid undergoes energy losses due to friction on the walls (regular head loss) or mishaps (singular head losses) such as baffles, for example. This loss of energy, expressed in pressure drop ( P) must be compensated to allow the fluid to move.

Calculate basic rates of heat transfer, heat transfer by conduction and heat transfer by natural or free convection with this free calculator. Multiply the thermal conductivity and the surface area. The optimum thermal design of a shell and tube heat exchanger involves the consideration of many interact- ing design parameters which can be summarized as follows: Process: 1. The transfer of heat from the surface of a heat exchanger to the bulk of a fluid being pumped through the heat exchanger is an example of forced convection. Process fluid assignments to shell side or tube side.

In process calculations , the main objectives of heat exchanger calculations are to determine the heat duty (amount of energy to be transferred), temperature changes within the exchanger , and pressure drops.