View Single Post
  #328   Report Post  
Posted to alt.energy.homepower,alt.solar.thermal,uk.d-i-y
Doctor Drivel
 
Posts: n/a
Default Solar water heating system value


"Brian Sharrock" wrote in message
...

"Doctor Drivel" wrote in message
reenews.net...

"Guy King" wrote in message
...
The message
from David Hansen contains these
words:

Some/many houses are badly designed. In these it probably makes
sense to heat the water electrically, especially if there is a
shortage of water.

This is the answer I got this morning from Candy UK when I asked why
they don't sell hot/cold fill machines.


Good morning due to the cold water in take the water level intake have
been
reduced washing machines only start to heat water at around 60degrees
and
above so hot water intake is not needed hence why it it more energy
efficient


Make of that what you will.


As most DHW is 45-55C this is tripe. What they are hiding is that they
want to put less in the thing.


Most DHW has cooled down to ambient temperature in the 'dead leg' from the
store to the washing machine inlet valve. What is the _measured_
temperature of the inlet water at time A - start of fill; B - end of fill?


Some people have secondary circulation pumps and dead legs that are not 100
foot long. In fact a secondary circulation pump can pay for itself in water
saved and less electricity used in hot and cold fill domestic appliances.
And voila, always instant hot water at the taps. No price can be put on
that.