# Heat Exchanger Design Calculator

These packages are supported by extensive component physical property databases and thermodynamic models. Specification of tube parameters - size, layout, pitch and material.

For any heat exchanger with a constant secondary flow rate, the operating steam temperature can be calculated for any combination of inlet temperature and outlet temperature. Long tube lengths with few tubes may carry shell side distribution problems. Typical dimensional arrangements are shown below, all dimensions in inches.

The Btu is the standard unit of measurement for heat. Specification of shell side parameters materials, baffles cut, baffle spacing and clearances. Related Searches Shell and tube heat exchanger Heat load calculation.

What would be the impact in capacity only as a comparison? The two fluids involved need to be identified. Selection of stream temperature specifications.

Maximum spacing pitch spacing does not normally exceed the shell diameter. For a shell and tube heat exchanger, for example, there would be an inside convective coefficient for the tube side fluid and an outside convective coefficient for the shell side fluid.

## Introduction

Heat transfer area of the heat exchanger under consideration. The database also included critical properties, boiling and melting points and come as separate software but easily integrated with the software. The heat capacity of each fluid is needed.

Material Thermal Conductivities. The tube or pipe diameters and length also need to be determined, as well as the pressure drop. The required heat transfer rate can be determined from known flow rate, heat capacity and temperature change for either the hot fluid or the cold fluid. Logarithmic Mean Temperature difference for pure countercurrent or concurrent flow.

The software is easy to use and have the ability to calculate unknown temperatures The plate dimensions and materials can be entered, this includes the size of plate heat exchanger and chevron angle. In a non-flow type applications the process fluid is kept as a single batch within a tank or vessel.

Total effective area calculation. Each of those parameters will now be discussed briefly.

The heat transfer coefficient for a given heat exchanger is often determined empirically by measuring all of the other parameters in the basic heat exchanger equation and calculating U. Baffles are used to support tubes, enable a desirable velocity to be maintained for the shell side fluid, and prevent failure of tubes due to flow-induced vibration.

Calculation of Heat Transfer Area. Plate heat exchanger dimension calculations. Windows operating system, Microsoft. Experienced-Based Rules Experience is typically what turns a good engineer into a great engineer.

The biggest problem in thermodynamics is the student to learn and recognize heat, work, force, energy, power and other technical terms. Conversely, if the control valve is opened so that the steam mass flow and hence pressure in the heat exchanger rise, the mean temperature difference between the two fluids increases. The overall heat transfer coefficient, U, depends on the conductivity through the heat transfer wall separating the two fluids, and the. It is used during a hydrostatic test that detects leaks at any joint on the heat exchanger.

Log Mean Temperature Difference. The driving force for any heat transfer process is a temperature difference. The following preliminary conservative estimates are given for pressure drops due to friction.

## Imperial and Metric Units

In a temperature control application, the inlet temperature of the secondary fluid to the **heat** **exchanger** may change with time. If it is too high, easy creator 9 revise the heat exchanger configuration until the pressure drop is acceptable.

Export Results summary to Microsoft excel or Print Results summary. Selection of heat transfer models and fouling coefficients for shell side and tube side. Create your own database of Plates and Components.

It is not possible to clean the outside surface of the tubes as these are inside the fixed part. Temperature and Flow rate estimation in the event of insufficient data. The tube length is determined by heat transfer required to process and pressure drop constraints. Entering temperature cold F. For convenience, this broad definition will be applied to the term heat exchanger.

They are commonly used in stacked sets with the single nozzles used as the inlet and outlet. If the pressure drop is acceptable, then the Overall Heat Transfer Coefficient U could be re-estimated for this heat exchanger configuration. This greatly increases the strength of the tube joint. Then either the flow rate of the other fluid for a specified temperature change, or the outlet temperature for known flow rate and inlet temperature can be calculated. Typical fouling coefficients are shown below.

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