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V-Phase units...

Former Community Member
Former Community Member
I am an electrician, and have just stumbled onto the V phase website: http://www.vphase.co.uk/how-it...-technology-explained 


I like the look of these, and if they stand up to their claims I will promote them to my domestic and commercial clients who often complain about their electricity bills. 


However, after making some enquiries I am hearing conflicting opinions on whether or not these will in fact save money. 


The website claims they save up to 17% on fridges, freezers and other motorized equipment and 3-5% on PC's. 


Some people have said that they are an outright rip-off -that motors will just run longer and slower in fridge/freezers-whilst others have said fridge freezers will just run less efficiently i.e cooler, and some have said that the theory is sound they're waiting to see how well they perform in the field and for consumer confidence to increase. 


I'm posting to see what the people here think of the concept, whether or not you think it will work and whether anyone has any experience they would like to share with them? 


All replies/opinions welcomed...
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  • 0
    Andrew White:

    Superficially,  if the Voltage is turned down the power used by the resistive element is going to be less. However, if the room warms up more slowly it is going to take longer till the thermostat clicks off. The power used is the same! This also applies to kettles, irons, ovens and so on.

     


    I don't agree that in all cases with the voltage turned down the power is the same. For a kettle it takes longer to heat up, so there is more heat loss from the kettle as it comes to the boil and thus the power used is higher. With an iron or an oven, the heat is controlled by the thermostat in the device so the same amount of power is demanded, but with lower voltage the current is higher and there are more losses in the cables, so again the power usage is higher (though possibly not noticeable).

    I definitely agree that spending the money on common energy improvements will get a better return on investment.

    Alasdair

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  • 0
    Andrew White:

    Superficially,  if the Voltage is turned down the power used by the resistive element is going to be less. However, if the room warms up more slowly it is going to take longer till the thermostat clicks off. The power used is the same! This also applies to kettles, irons, ovens and so on.

     


    I don't agree that in all cases with the voltage turned down the power is the same. For a kettle it takes longer to heat up, so there is more heat loss from the kettle as it comes to the boil and thus the power used is higher. With an iron or an oven, the heat is controlled by the thermostat in the device so the same amount of power is demanded, but with lower voltage the current is higher and there are more losses in the cables, so again the power usage is higher (though possibly not noticeable).

    I definitely agree that spending the money on common energy improvements will get a better return on investment.

    Alasdair

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