harry wrote:
On Mar 11, 10:12 pm, Tony wrote:
harry wrote:
On Mar 9, 9:13 pm, 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+. And you know that hydronic systems have water
in them that seldom goes above 160F, and somehow your mind tells you
that 160F is just as dangerous as 212F+. How do you do it? You are
todays Einstein!- Hide quoted text -
- Show quoted text -
You are showing your ignorance here. The temperature of steam depends
on it's pressure. That pressure can be above or below atmospheric
pressure. If it is sub-atmospheric the temperature can be as low as
120degF. If it is at amospheric pressure the temperature is 212degF.
The upper limit can be as high as you like.
I thought we were talking about a one pipe system? Maybe that was
another thread, maybe not??- Hide quoted text -
- Show quoted text -
There are such things as one pipe steam heating sytems where the steam
pipe is run to fall back from the radiators to the steam boiler. The
condensate runs in the opposite direction to the steam flow (in the
same pipe) back to the boiler.
I think they were popular in America at one time I think.
It's a simple sytem but control is poor and noises are often
generated. The steam pressure is low, the boiler is usually cast iron
and extremely inefficient.
Yes, that's what I'm talking about. With steam coming out some of the
radiators. It's always above atmospheric pressure, not much, I think 2
to 5 pounds. Pipes clang away. I worked at a place that had that heat
about 25 years ago and while I was there he had a new boiler installed.
The old boiler was very inefficient, originally coal converted to oil.
The new boiler was about 1/4 the size and paid for itself in about 3
years.