Re: Reducing power consumption of water heaters

Sounds logical to me.
I am not a technical guy, but I do know that there
are electronic rheostats before.
This Cycle deletion technique you describe is interesting.


Pluto wrote:
AFAIK, there should be no safety problems.
There are quite a few models in the market. Korean and Japanese brands.
Mostly for instant water heaters. The unit is connected between the 220 volt
power and the heater.

Basically it works like this. It removes a few input power cycles.

For example - lets say the power input is 220 Volts 50 Hz.
There is a TRIAC within ( electronic switching relay ) , controlled by a
microproceesor.
Depending on the user setting, the processor switches off the triac for
every second or third or any user pre-determined cycle of the power supplied
to the heater. To prevent RF interference to the TV, radio reception, the
processor uses zero-crossing switching.

Normally, the cold water flows through the heater coil , absorbs the heat
and comes out as hot water.
The asumption in this deice, is that there is latent heat in the heater
coil which is wasted away as radiation and convection, as the water does
not have enough time to absorb all its heat.
Hence by switching off a few power cycles, heat energy waste is minimised.

Provided the unit is installed properly, away from direct water flow etc,
there is no safety issue to worry about.


"Sebastin" <sebastikay@xxxxxxxxx> wrote in message
news:1160698121.635229.172180@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
A colleague of mine bought a device last month, that supposedly
reduce power consumption of bathroom water heaters.
The device package claims 20% or more reduction in power used by the
heater.

Water heaters are normally 2000 Watts or more. Hence 20% savings
in power looks attractive. Any one here can explain how this device
works.?
Does it have any side efeects concerning safety.


.

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