On Mar 11, 11:08*pm, "
wrote:
On Thu, 11 Mar 2010 12:45:48 -0800 (PST), harry
wrote:
On Mar 11, 4:16*am, "
wrote:
On Tue, 09 Mar 2010 16:13:27 -0500, Tony wrote:
wrote:
On Mon, 08 Mar 2010 22:18:36 -0500, Tony wrote:
willshak wrote:
Doug Miller wrote the following:
In article , willshak
wrote:
Doug Miller wrote the following:
In article , willshak
wrote:
The disadvantages are that they are big and ugly and get very hot
(don't allow toddlers around them). * * * * * *
Horse-puckey. They don't get any hotter than the water that's
circulated through them.
They have enclosures especially built for them which also helps
with the ugly part.
Some do. Many don't.
Another advantage is you don't need a humidifier, just put a pan of
water on top of them.
I was brought up in homes with steam radiators in NYC.
Ahh, that explains your misconceptions. You're apparently unaware
that many homes are heated by hot water, not steam.
I was raised in NYC in the 1940s. *Steam was the main heating source
for many homes and buildings.
You haven't been around long enough to contradict me on what I remember.
I didn't say you remembered incorrectly -- I said you have
misconceptions about radiators. You do. They don't get any hotter than
the water that's circulated through them.
Read this:
http://en.wikipedia.org/wiki/New_York_City_steam_system
Instead of beating around the bush, steam under pressure is much hotter
than water in a hydronic system.
Most steam systems are not under (significant) pressure; certainly not
domestic steam systems. *
Oh thank Gawd it's you to save us again! *I thought steam, at just a
couple pounds of presure will get hotter than the boiling point of
water, you know, 212F+.
I see you're illiterate, as well as being stupid as a stump.
And you know that hydronic systems have water
in them that seldom goes above 160F
Bull****. *Most are set for 180F to 200F. *The higher the temperature the
higher the efficiency.
and somehow your mind tells you
that 160F is just as dangerous as 212F+. *
Of course you're a liar, too.
How do you do it? *You are todays Einstein!
With you as a reference, I can see how you would come to that conclusion.- Hide quoted text -
- Show quoted text -
Afraid not. Lower temperature systems have a higher efficiency.
Wrong. *In this case, the gas fire is hotter than the loop. *You want the loop
to be as hot as possible to minimize the heat lost in the heat exchanger. Heat
pumps operate at a lower temperature for similar reasons (lower delta-T).
BTW, there are no efficient heating systems in America.
Now you're just being stupid.- Hide quoted text -
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The hall marks of efficiency are the three T's. Time, turbulence and
Temperature difference.
The lower the temperature of the heating medium (ie water in this
case), the greater the energy transferred from the burning fuel to
that medium.
For an excercise, explain the other two T's.
I had a look round the last time I was in America. Appalling. You
are thirty years behind European standards.