# Category - Key equations for Process Engineers

## Advanced control valve sizing guidelines

When sizing the control valve, caution needs to be taken for covering all possible scenarios and sometimes need to ensure some of the non-idealities like...

## Guidelines for control valve sizing calculation

Information required for sizing control valve is as follows

Inlet pressure all possible cases
Outlet pressure (or pressure drop) all possible cases
Inlet...

## Detailed theory for control valve sizing

Control valve sizing is relatively easy. The available information plays important role and that is why control valve sizing is done differently for different...

## Important Equations for Process Design

Important equations for process design engineers for - mass balancing, pressure drop calculations as well as for design of process equipment and...

## Basic properties of steam

Besides steam pressure and steam temperature, other important steam key properties include as a minimum the following:
Steam Enthalpy
Put is simply, enthalpy...

## Compressor Power and Efficiency Equations

This page lists equations frequently used in compressor power and efficiency calculations along with their description and significance.
Gas compression can...

## Reliability coefficient for pumps

Pump Reliability Coefficient - Definition
The symbol for reliability coefficient is letter 'r'. A pump reliability coefficient value of 0.00 means absence of...

## Energy balance calculation for heat exchanger

Energy balance calculation is often done for designing a heat exchanger to determine operating parameters for hot and cold fluids such as - inlet / outlet...

## Calculation of overall heat transfer coefficient

Problem Statement
Determine the overall heat transfer coefficient 'U' for heat transfer occurring from superheated steam in a steel pipe to atmosphere, with...

## Heat transfer coefficients for heat exchangers

Steady state convective heat transfer on either side of a heat exchanger (hot or cold side) can be expressed with following figure and equation,

## Heat Transfer – Convection of Heat

Heat transfer by convection generally occurs between a fluid and a solid surface and convective heat transfer is accompanied by motion of the fluid. This is...

## Sample Problem – Gas liquid separator sizing with demsiter pad

Problem Statement
Perform separator sizing calculations for a vertical gas-liquid separator used for separation of fuel gas bubbles entrained in water...