performance curves

performance curves

[pər′fȯr·məns ‚kərvz]
(engineering)
Graphical representations showing the abilities of rotating equipment at various operating conditions; for example, the performance curve for a compressor would include rotor speed for various intake and outlet pressures versus gas flow rate adjusted for temperature, density, viscosity, head, and other factors.
References in periodicals archive ?
This could be related to the iPhone 6s' battery issues that Apple announced over a year ago, but it could also be a sign that Apple is using different performance curves for each device.
The performance curves of the regenerative pump working with these fluids were compared to assess the effect of fluid viscosity on the operation of regenerative pump.
Since fan performance curves relate actual fan airflow rate to other measurable operational variables such as fan head, speed, and shaft power, the airflow rate through a fan can theoretically be determined based on these variables using fan performance curves.
The benefits may consist of one hand to develop performance curves or curves fire sectoring elements and secondly to perform tests or expertise as part of the qualification of fire-resistant products central nucleaires.
On the basis of the performance curves for each day they are calculated average values of performance for each hour and subsequently assembled average performance curve for the whole of the monitored period.
Conversely, variable-speed chillers have performance curves that scale with the chiller speed and entering condenser water temperature.
In general, thermal performance curves were nonlinear and asymmetric, such that metabolic rate rose gradually with temperature to a maximum at some intermediate value and then dropped quickly at higher temperatures.
He develops concepts mostly on an intuitive, physical basis, and provides further insight through applications and performance curves.
Figure-3 shows various tubing performance curves plotted against an IPR curve.
The performance curves shown in Figure 3 are used to define the HVAC system's cooling performance and were created from manufacturer's data (VRF), used directly from the original reference building (REF), or found in the EnergyPlus data set (HP).
In real operation, compressor performance curves in the coordinate system are unique for constant given suction conditions.
Pump manufacturers can use the software to generate a catalog of data-driven performance curves.

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