How to calculate energy consumption?

[pci6034e]

Hi,

I am Ainaa from MMU. I have try multiple way to calculate energy consumption. What is the most accurate way to calculate both power and energy.? 

[jhsdelallana · Accepted solution]

Hi,

Depends really on a number of factor. What specific DAQ device are you using? Do you have any current transducers available? Do you only want to compute for Real Power or do you need to include Reactive?

For starters though, you can use the voltage input, then the formula P= (V^2) / R to get the Power in Watts. Multiply time in seconds (software timed) to get the energy in Joule.

Best Regards,
Joshua de la Llana
NI Applications Engineer

[pci6034e]

hi,

So happy receive feedback from you.Thank you. We are using Multifunction DAQ card pci6034e. We will obtain input voltage and current. For current we used current clamps. For voltage we step down using single phase transformer. Here i have developed some simulation but still wondering whether it the correct wayusing LabVIEW 7.1 to calculate energy.We are  After doing the hardware setup than we can compare with energy meter,

Please help  me,Thank you. 

[pci6034e]

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[jhsdelallana]

Hi,

NI PCI-6034E should be capable of implementing this application. The most relevant of which is the sampling rate, which should be high enough to accurately measure phase offsets.

The critical part, however, would be matching your transducer specification with the DAQ card, more importantly, the analog voltage input range. PCI-6034E only has a voltage range of +/-10V, you'd have to maker sure this is not exceeded in order to ensure the integrity of your measurements and the safety of your device.

Other than these, I see no problem.

Best Regards,
Joshua de la Llana
NI Applications Engineer