Engineering ToolBox - Resources, Tools and Basic Information for Engineering and Design of Technical Applications!

Pump - Temperature Rise vs. Volume Flow

Calculate temperature rise vs. volume flow in pumps.

Sponsored Links

No pump is perfect with 100% efficiency. Energy lost in friction and hydraulic losses transforms to heat - heating up the fluid transported through the pump.

Pump power - SI and Imperial units

The temperature rise can be calculated as

dt = Ps (1 - μ) / (cp q ρ)                                       (1)

where

dt = temperature rise in the pump (oC)

q = volume flow through pump (m3/s)

Ps = brake power (kW)

cp = specific heat of the fluid (kJ/kgoC)

μ = pump efficiency

ρ = fluid density (kg/m3)

A typical relation between flow, efficiency and power consumption for a centrifugal pump:

Pump - power efficiency versus flow

Pump - Temperature Rise Calculator

Ps - brake power (kW)

μ - pump efficiency

cp - specific heat (kJ/kgoC)

q - volume flow (m3/s)

ρ - density (kg/m3)

Example - Temperature rise in water pump

Temperature rise in a water pump working at normal conditions with flow 6 m3/h (0.0017 m3/s), brake power 0.11 kW and pump efficiency of 28% (0.28) can be calculated as

dt = (0.11 kW) (1 - 0.28) / ((4.2 kJ/kgoC) (0.0017 m3/s) (1000 kg/m3))

    = 0.011 oC

Specific heat of water cp = 4.2 kJ/kgoC.

If the flow through the pump is reduced by throttling the discharge valve the temperature rise increase. If the flow is reduced to 2 m3/h (0.00056 m3/s), brake power slightly reduced to 0.095 kW and the pump efficiency reduced to 15% (0.15) - the temperature rise can be calculated as

dt = (0.095 kW) (1 - 0.15) / ((4.2 kJ/kgoC) (0.00056 m3/s) (1000 kg/m3))

    = 0.035 oC

With manufacturing documentation the temperature rise versus throttling can be expressed as:

Pumps - throttling and temperature rise

Sponsored Links

Related Topics

  • Pumps

    Piping systems and pumps - centrifugal pumps, displacement pumps - cavitation, viscosity, head and pressure, power consumption and more.

Related Documents

Sponsored Links

Engineering ToolBox - SketchUp Extension - Online 3D modeling!

3D Engineering ToolBox Extension to SketchUp - add parametric components to your SketchUp model

Add standard and customized parametric components - like flange beams, lumbers, piping, stairs and more - to your Sketchup model with the Engineering ToolBox - SketchUp Extension - enabled for use with older versions of the amazing SketchUp Make and the newer "up to date" SketchUp Pro . Add the Engineering ToolBox extension to your SketchUp Make/Pro from the Extension Warehouse !

Translate this Page

Translate this page to Your Own Language .

About the Engineering ToolBox!

Privacy Policy

We don't collect information from our users. More about

Citation

This page can be cited as

  • The Engineering ToolBox (2006). Pump - Temperature Rise vs. Volume Flow. [online] Available at: https://www.engineeringtoolbox.com/pumps-temperature-increase-d_313.html [Accessed Day Month Year].

Modify the access date according your visit.

close

3D Engineering ToolBox - draw and model technical applications! 2D Engineering ToolBox - create and share online diagram drawing templates! Engineering ToolBox Apps - mobile online and offline engineering applications!

Unit Converter

















































9.19.12

Sponsored Links
.