Re: [Phys-l] Heat transfer lab

[Bernard Cleyet <bernardcleyet@redshift.com>]

Just so, according to:

http://www.inspectapedia.com/heat/Steam_Vents.htm

bc, googler and the pic. (second one) is as he remembers from his Palo Alto days (ca 1941 => 48), and remembers its always hissing a little, and  because of a very traumatic childhood, doesn't remember the system in his Paris flat toggled by date not weather!

And:  wikipedia neologizes:   

http://en.wikipedia.org/wiki/Hydronics  **


** Not in OED -1971

On 2010, Nov 19, , at 14:36, Edmiston, Mike wrote:

> Now that Clarence has mentioned this, I believe that is what I remember from my grandparent's house.  The vent is bidirectional for air (when it is cold), but supposed to close when the steam arrives.  Air can go in when the steam is turn off.  Air can come out when the steam is first turned on, but once the steam heats the vent, it is supposed to close.  If it works well, it only lets a little steam escape before it closes, and then it doesn't let any more steam out until the next cycle.  If the vent continuously emits steam, it sizzles, and is too noisy, and I remember my grandfather saying, "That radiator vent needs replaced."
>
> The steam-radiator vent is like the thermostat on the radiator of a car, except reverse acting.  The car thermostat open when it reaches a certain temperature.  The steam-radiator vent closes when it reaches a certain temperature.