On 19 Apr, 15:56, "Tracy" wrote:
"John Stumbles" wrote in message
news
On Thu, 19 Apr 2007 09:50:45 +0000, Tracy wrote:
Hi I have gas heating my hot water cylinder and use approx 22KW of gas
per
day for this. Is this about normal for four 5min power showers per day
plus
hot water for hand washing and dish washing etc? It works out about £3.75
per week as I pay a higher rate for the first 1465KW per quarter, so in
the
summer my gas costs me more than the winter because I use less of it
The hot water is a Johnson & Starley Janus system that is always on as
there
is no convenient way to turn it off
My hot water cylinder is foam coated plus it has an additional cylinder
jacket and all the hot pipes have a foam type of insulation.
So any suggestions as to how I can save more money on my gas?
Regards, Tracy
I assume you mean 22kw hours i.e. the equivalent of 22kw for one hour each
day. (BTW how did you measure this?) 22kw is roughly the output of a small
combi so it's like running this at full DHW output for an hour each day.
Your power shower is probably about this so that accounts for about 4 * 5
= 20 minutes = 1/3 of the total. You'd have to be running a hot tap at
full output for another 40 minutes for the rest, so your usage does seem a
bit high. Either your power showers are using a lot more than you estimate
or there are high losses somewhere in the system or a combination of the
two.
OK here are my working out figures for gas consumption. Yesterday, meter
read 6754 and today read 6756 which give 2 cubic meters of gas. Using
figures supplied by my gas supplier this gives 2*40.27292*1.02264/3.6 which
gives 22.88039 KW of energy used in 24 hours NOT 1 hour as you have
mistakenly written. So regardless of when I have my showers and for how long
and use my hot water the cost remains at cost of gas per KW times 22.88039.
Why do people seem to not understand how gas consumption is measured and
paid for and assume totally unrealistic things.or do they just like to
complicate matters
.I assume you mean 22kw hours i.e. the equivalent of 22kw for one hour each
day. where did I say that?
It is perfectly clear that I mean I used 22.88039 KW of gas in a day. That
is what I said.
use approx 22KW of gas per day or to make it easier I used 2 cubic meters
of gas but the gas company converts it to KW and charges that way.
All I want to know is if that is the quantity of gas in cubic meters or
kilowatts that other people use with a similar set up to mine. Also you
might have misunderstood what I meant by a power shower. It is a shower that
has a hot pipe connected to the hot water tank in the bedroom cupboard, a
second pipe connected to the cold tank in the attic and when it is turned on
a pump in the shower unit sucks hot and cold water from their appropriate
containers, mixes them then delivers it from the shower head at a greater
pressure than if gravity was allowed to act normally.
It may be worth bearing in mind that John is a resident expert in this
sort of thing, whereas you have yet to understand basic units.
I also was wondering about the J&S bit.
NT