Pinging Brad White

jackchips_2

I have the original computer game in my attic.

PONG.

Strange how some words just bring back memories.

Jack

ralman

RE: your offer of assistance

Hello Brad,
I have attached a word document drawing of my monoflo tee distribution system. My concerns with the piping is referenced at points A, B, C, and D. Points A, b, and C are supplied on the right(longer loop) and return on the left(shorter loop). Points C and D appear to me as short circuits (within the limits of that pipes flow capacity?). Point C has about 45' of 1.25" main between monoflo tees. Point D has about 50' of 1.25" main between monoflo tees. I am not sure if these are problems, or if they will become problems if I implement changes (boiler decoupling, buffer tank, outdoor reset,constant circulation, and envelope sealing) that have been recommended in the posts I have made here on this site.
My wide delta t has been identified as a problem. In an effort to understand delta t, I had posted some questions on total water content, flow rates and boiler output BTU's. Here are my thoughts so far.
1. Due to the large water content of my system (84 gallons) and short intervals between a call for heat and the thermostat being satisfied (5, 3 minute cycles per hour between 25* and 35* outdoor temp), I was thinking that at a 14 gpm flow rate(the max for a 1.25" main) that in 3 minutes of circulating during a heat call only 42 gallons of water would touch the boiler. In other words, the water in the boiler at the beginning of this heat call will not make it back to the boiler on this heat call, nor will it reach each and every baseboard.
2. I had read weeks ago somewhere that iron pipe within the envelope did not need to be insulated with the understanding that you lose control of that heat by not doing so, but copper pipe should always be insulated. I had calculated my standby loss at 21,750 BTUH. That number seemed very high to me (unbelievable). A few weeks passed and I got to thinking about how a heat sink is used when soldering electronic components and wondered if 361' of iron pipe was acting like a heat sink. I tried to put a number on it. 10 BTU's per foot x 361' of pipe = 3610 BTU's x 4 heat calls per hour = 14,440 BTUH.
This is what drives my curiosity about the effects of total water content. If I address these two issues my delta t will become closer( maybe, I am not sure and even if they do, they may not be the best options and they may not bring delta t close enough). I think I should insulate all the pipes. I am wondering what options are available to reduce water content.
Please review and post your ideas when you get a chance.

Thanks!

Brad White_9

Ponging Ross Alman

Ross, Hi

I will have to take a look at this over the weekend. I did get your e-mail. Let's see what we can come up with.

Brad

ralman

I thought maybe your spam filter kicked out my email.

Hi Brad, Have a great weekend!