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charliechicago

charliechicago

Joined on January 19, 2012

Last Post on February 25, 2014

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thanks

@ February 16, 2013 8:14 PM in how much BTU does a person give off

thanks swei

how much BTU does a person give off

@ February 15, 2013 5:07 PM in how much BTU does a person give off

Hello to all
How much cooling BTU (both sensible and latent) do you need the heat given off by a person?
Thanks, Michael.

heel tee

@ February 10, 2013 12:30 AM in hot water loop off steam boiler

gotcha thanks again

I lust finished

@ February 8, 2013 12:02 PM in hot water loop off steam boiler

reading link that dan included with his response, that answered my question about why the water stays up. But i still dont know what a heel tee is and why that caused boiler flooding.
Thanks again, Michael

jonny 88

@ February 8, 2013 11:54 AM in hot water loop off steam boiler

Thanks for the response, much appreciated.
You got me thinking with the example you gave, what does keep the water in the loop from pushing back into the boiler? What is a heel tee and why did that allow the water to flood the boiler?When you say gauge, you mean a temperature gauge?
Thanks for your time and advice, Michael.

thanks

@ February 7, 2013 8:26 PM in hot water loop off steam boiler

thanks again dan, much appreciated.

i thought

@ February 7, 2013 3:58 PM in heat load calculation-HELP

thats what it might be but was not sure. thanks

its a nice suprise

@ February 7, 2013 2:23 PM in hot water loop off steam boiler

to get a response directly from you dan. but whats "gravity circulation"? and whats blending. like i said i have read the book but am new to much of the concepts.
thanks, michael.

hot water loop off steam boiler

@ February 7, 2013 2:00 PM in hot water loop off steam boiler

hello to all
i have been in the trade for almost a decade but have only recently become exposed to the beauty of 'the lost art of steam heat'. why does the hot water loop need flow controls on supply and return? even when producing steam wont they both be at the same pressure and therefore have no flow. also, on one such loop there was a 3/4 inch pipe connecting the two flow controls, whats that for?
thanks for the help, michael

heat loss

@ February 7, 2013 1:39 PM in heat load calculation-HELP

thank you john. what is "studding"?

bubbles

@ February 7, 2013 9:16 AM in bubbles in sight glass

Thanks for the response Mr Silberstein.
When you say that "this increases the flow rate in the liquid line" do you mean that the "extra" liquid leaving the liquid line through the txv causes a slight pressure drop in the line and causes flashing? Would i theoretically see bubbles in the entire liquid line as well?
Thanks, Michael.

thanks

@ February 6, 2013 10:52 PM in heat load calculation-HELP

Thanks for the response, i see the logic in what you are saying. Michael.

manual J

@ February 6, 2013 8:01 PM in heat load calculation-HELP

thanks for the response. much appreciated

manual J

@ February 6, 2013 8:01 PM in heat load calculation-HELP

thanks for the response. much appreciated

good question

@ February 6, 2013 6:50 PM in heat load calculation-HELP

Alan, thank you for your response.
I had the same question after I posted;  will anyone actually understand what my question is!!
Basically I am asking, is the ACCA manual J (or others) accurate. Is there a "learning curve" to it. Are there certain common mistakes that can be avoided. For example, I have read on HVAC forums of homeowners writing is to ask why three different contractors gave them THREE different load calculations and three different equipment sizes. It is not a difficult calculation, I wonder why they came up with different answers.  4+4=8. I am afraid to use it and them find out that the equipment is undersized. Or am I just influenced not to think it is accurate by all the contractors who dont use it and say its no good.
Again, thanks for your response, Michael

bubbles in sight glass

@ February 6, 2013 5:35 PM in bubbles in sight glass

Hello All
Why do I commonly see bubbles in the sight glass of refrigeration units when they are properly charged.  And if its because the larger size of the sight glass lets some of the liquid flash, why then dont I always see it. And if you say thats because sometimes there is more subcooling, than you might be right!

heat load calculation-HELP

@ February 6, 2013 3:45 PM in heat load calculation-HELP

Hello to all and thanks for any input, it is greatly appreciated. I am trying to keep this as short as I can, really.  I have worked in the HVACR field for almost a decade and have recently started my own company.  Now that I am on my own I  am encountering certain situations that, although I am familiar with the concepts, I do not have a lot of practical experience with them. For example, heat loss/gain calculations. I went to trade school and have read manual J (I think its the abridged version).  I constantly encounter houses where, for example, the top floors where the attic has been finished are too hot or cold.( I understand this could be a ductwork issue I have read manual D too). Many, but not all, of the contractors I speak to say that manual J (I wont say which one) is not accurate or that it undersizes or that it has just never worked for them. I had a situation with a room is a finished attic with one radiator. I calculated BTU of radiator (from lost art of steam heating) and heat loss of room and my calculation was that the radiator was more that sufficient. I dont want to simply oversize, I wantto be able to do a proper calculation, both for myself and for the customer. I am puting is a bid for a furnace replacement and the existing is 120,000 BTU, I would like to be able to know with confidence if it is oversized.
Any advice would be greatly appreciated

Owner/Field service tech

@ January 19, 2012 3:48 PM in Owner/Field service tech

How do you skim a boiler

Owner/Field service tech

@ January 19, 2012 3:48 PM in Owner/Field service tech

How do you skim a boiler
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