My mum´s house, built 1974, has a conventional oil fired central
heating system which supplies hot water to a cylinder and radiators.
The house is in an area with very good wind resource. I want to install
a small wind turbine to supplement the oil fired heating system. The
wind turbine I wish to use has a maximum power output of 1.4kW. The DC
output voltage can be either 12v, 24v or 48v. In windy weather it can
produce 33kW per day.
I wonder what is the best way to tie the wind power into the central
heating system. I have considered the following possibilities:
1. Install a suitable low voltage 1.5kW water heater in or connected to
the cylinder. This should provide lots of hot water but no much thru
the radiators. Can you recomend a suitable water heater?
2. Install a suitable low voltage 1.5kW water heater on the cold water
input pipe to the boiler. Leave the boiler on low so that the pump will
circulate the water thru the radiators and cylinder. Can you recommend
a suitable water heater?
I would greatly appreciate any advice you may have.
Thanks in anticipation.
Huh?, thought that was pretty obvious from the OP - 33kW per day. Or
approx 1.4kW/hr, also what the OP stated. Together with a low-loss
distribution system to the water heaters that the OP stated, gives
1.4kw/hr (33kw/day) heating to the house.
To the OP - good luck, mate. I'd look towards the higher voltage setting
(48v) to simplify distribution, then check this link for a US
distributor of a 48v, 30A (1440W) water heating element:-
The point being made was that the units were mixed - 1.4kW is the power
rating. He probably meant 33kWh (kilowatt-hours) per day, of course (1.4
x 24 isn't far off that).
The measurement of 1.4kW/hr is meaningless, as a watt is (simply) a
measure of power output, not total power - kilowatts *per hour* cannot
mean anything sensible here. Again, I suspect that you also mean
kilowatt-hours (kWh), in other words a certain number of kilowatts
sustained for a pewriod of an hour.
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As previous reply - yes, needed to engage brain. Sad thing is not just
basic physics but classically trained with E&E eng through Uni. Was too
eager to jump onto a non-value-added reply. You're quite right, though,
that original units were ambiguous / wrong. The basic premise, however,
that the OP wanted to heat his mother's water by 1.4kWhr all day should
still be obvious, and the link to the American website (pah!) with the
48v heater element still addresses the OP's query. Re: "no sense" -
agreed, the details were incorrect, however, would not require a massive
leap of faith to understand and answer OP's question.
Nope - still doesn't make sense. Do you reckon he means 33kW
continuously for a whole day - that'd be 792kWh.
Or perhaps it's 33 kWh in a day - that's an average of a little less
than 1.4kW continuously across a day.
Pay no attention to the man behind the curtain.
Thank you for this. Very useful. I did, of course, drop the ´h´ from
the 33kW, it should have read 33kWh. My mum´s house is in Mayo on the
west coast of Ireland. Very windy place. Selling excess power to the
utility (ESB) is not an option. (Nor are there any subsidies or grants
for Wind Turbine installation).
Does anyone have any views on how to tie the wind turbine into a
conventional oil fired central heating system?
I´m grateful to all of you who took time to reply. Many thanks.
Why not use something easier like....
Then, Electricity supplier dependent, just use generated power to
supplement daily electricity use (including immersion heater or
whatever), and sell un-used power back to the electricity company.
That's what I am hoping to do as and when we get plans drawn up for
house/garage/roof changes. As we get the full force of prevailing
S.Westerly winds coming up the Severn.
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I see a problem here. People dont normally use alt generated
electricity for heating because you could generate the heat directly
for a fraction the cost. If you are installing a windgen, use its
output for leccy. If you need heat, go with one of the solarthermal
techs that pays back properly, eg:
PS 33kWh = 33x 8p = £2.66. But the great majority of days it wont
produce anything like that.
Fwiw if you want to use leccy to heat water, just put it through the
water. AC only though.
On 15 Mar 2006 15:20:20 -0800 someone who may be firstname.lastname@example.org
I don't call it a challenge. However, doing this involves ductwork,
fans (probably) and control systems. What that means is that it is
not as simple as cutting a hole in the side of the house and what
that also means is that there are some costs and energy inputs to
Barns are (generally) different to houses.
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
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