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stages of heating cycle?

steamheatnewb
Member Posts: 29
I am trying to troubleshoot a water hammer noise I am having at a pitched radiator with an old single pipe steam system. While reading many of the articles on this site, I see a reference to stages of the heating cycle - what is the meant by the "middle" or "end" of the heating cycle? Here is an example:
<ol><li>The steam quality is bad. It's not just faulty near-boiler piping
that can throw water up into the system. Dirty water, or water that has
a pH that's too high can do it as well. This type of water hammer
usually happens during the middle of the firing cycle.</li></ol>
Thanks!
<ol><li>The steam quality is bad. It's not just faulty near-boiler piping
that can throw water up into the system. Dirty water, or water that has
a pH that's too high can do it as well. This type of water hammer
usually happens during the middle of the firing cycle.</li></ol>
Thanks!
0
Comments
-
Easiest way to look at this
is to see -- or more accurately, feel -- what is happening. The early stage is when steam is first starting to be made, and is beginning to get out into the system. It doesn't end with a definite mark, rather it ends for each radiator when the radiator is getting live steam -- that is, when the radiator, not just the pipe leading to it, is getting steam hot right at the inlet. During this stage there is a lot of condensation going on in the steam mains and risers -- even in the best insulated system -- and if that condensation can't go somewhere, it bangs.
The middle stage, to my mind, is when steam is flowing to the radiators -- and, more important, the mains and risers are hot, so condensation in them is not a factor. It is at that stage that water hammer from wet steam can become a real problem (it's there in the beginning stage, too, but masked by any condensate problems).
There are all sorts of problems which can cause wet steam; you have listed some of them.Br. Jamie, osb
Building superintendent/caretaker, 7200 sq. ft. historic house museum with dependencies in New England0
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