# Result Table - Fans and Compressors

The available results that are listed in the table vary depending upon the visible properties that you have selected. Figure 1 shows the normal or default rows. You can choose the rows you wish to display in the results table via the Set Visible Results Dialog. Figure 1: Available results for a fan or compressor. Only descriptions for the default results are shown in this section. If you wish to see the definition for other values click here. -- ID -- (aka User Number): All flowsheet elements have a unique number that is assigned by FluidFlow. It is not possible for the user to change this number because it is used as a unique identifier by the scripting module. Node numbering starts from 1, incrementing upwards, and pipe numbering starts from -1, decrementing downwards. Composition Mass %: This is the fluid mass composition that remains constant throughout the fan. FluidFlow determines the composition from an individual component mass balance is carried out at each node. Duty Efficiency: This is the efficiency that the fan will operate at the duty point. Duty Flow: This is the flow that FluidFlow has calculated that the fan or compressor will deliver when it is placed in your system. When you place a fan or compressor in any pipe system there will always be one unique flow that will occur, and this is called the duty flow. Any fan or compressor will always operate on its performance curve, the position of the duty flow point is determined by the intersection of the system curve and the booster capacity curve. Duty Power: The shaft power needed to drive the fan or compressor. In practice the total power needed will be greater, because the shaft power does not include any losses in the transmission train or driver. Duty Pressure Rise: This is the pressure that will be developed by the fan or compressor at the duty flow. This is the stagnation pressure rise (in the literature often called dynamic pressure or total pressure). Flow at NTP: This is the volumetric duty flow referenced to normal gas conditions of 101325 Pa and 0°C Flow at STP: This is the volumetric duty flow referenced to standard gas conditions of 101325 Pa and 15°C In Stagnation Pressure: The stagnation pressure at the fan inlet. This is the sum of kinetic and pressure energies (static pressure + velocity pressure). Stagnation pressure is the pressure a flowing fluid would rise to if brought isentropically to rest, converting its kinetic energy to enthalpy. In Stag. Temperature: This is the stagnation temperature at the fan or compressor inlet. The stagnation temperature is the temperature that the fluid would reach if it were brought to rest isentropically, converting its kinetic energy to enthalpy. In Static Pressure: This is the pressure that acts equally in all directions at the point in the fluid and is present irrespective if the fluid is flowing or if the fluid is at rest. The pressure inside any element is not the static pressure, unless there is no flow. Stagnation pressure is the flowing pressure. In Static Temperature: The static temperature at the element inlet. Static temperature is related to stagnation temperature (ignoring work, heat exchange, and potential energy) by the equation T1 = T10 - 0.5v12 / Cp In Velocity: The average velocity at the fan or compressor inlet, determined by m/(r1 Ap) Out Stagnation Pressure: The stagnation pressure at the fan or compressor outlet. This is the sum of kinetic and pressure energies (static pressure + velocity pressure). Stagnation pressure is the pressure a flowing fluid would rise to if brought isentropically to rest, converting its kinetic energy to enthalpy. Out Stag. Temperature: This is the stagnation temperature at the fan or compressor outlet. The stagnation temperature is the temperature that the fluid would reach if it were brought to rest isentropically, converting its kinetic energy to enthalpy. Out Static Pressure: This is the pressure that acts equally in all directions at the point in the fluid and is present irrespective if the fluid is flowing or if the fluid is at rest. The pressure inside an element is not the static pressure, unless there is no flow. Stagnation pressure is the flowing pressure. Out Static Temperature: The static temperature at the element outlet. Static temperature is related to stagnation temperature (ignoring work, heat exchange, and potential energy) by the equation T 2 = T 2 0 - 0.5 v 2 2 / C p Out Velocity: The average velocity at the fan or compressor outlet, determined by m/(ρ 2 A p)