Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.
Flow rate in copper pipes
But if the velocity is too low don't you end up with air trapped at the high sections?
Flow rate in baseboard loops
We are updating an existing heating system that has finned baseboard on the second floor. They are all piped in with ¾ copper.
In calculating flow rate with a 10° temp drop and the various heat loads I get values ranging from 1.5 to 2 gpm which according to what I can tell is too low to sweep any air bubbles from the system.
One chart recommends 3.2-6.5 gpm.
Question: Should we increase the flow rate to say 3.5gpm and let the temp drop fall where it may?
you don't want much more than 4 gpm or you will get noise from velocity.0
not if you pipe....
it properly. Pipe it w/ the circ. pumping away from the expantion tank and leave the pressure @ 18psi. Have you read any of dan's books? kpc0
We intend to pipe it as you suggested. It's not that way now.
The only book I have is "Modern Hydronic Heating" by Siegenthaler which led me to belive I needed a velocity of 2-4 ft/sec.
More books are good. Can you point me toward "dan's books"?0
Outdoor wood boiler
To complicate things a bit we want to use an outdoor wood boiler from Central Boiler.
The sales person/installer says we don't need a flat plate heat exchanger even though the wood boiler is vented to the atmosphere. It seems to me that maintaining 18 psi would be a problem with a boiler vented to the atmosphere.
Any comments on this would be appreciated.0
you need a HX.
My opinion of these wood boilers is not very high. I am working w/ a friend on one who did not take my advice. It can get very pricey w/ flat plate hx. big circs. and lots o' eco-flex pipe. Pumping away is a great book....0
have you considered a wood gasification boiler. for in the house. Look at tarm or econoburn0
This discussion has been closed.
- 121.3K All Categories
- 84K THE MAIN WALL
- 2.9K A-C, Heat Pumps & Refrigeration
- 53 Biomass
- 417 Carbon Monoxide Awareness
- 40 Chimneys & Flues
- 1.7K Domestic Hot Water
- 4.7K Gas Heating
- 119 Geothermal
- 155 Indoor-Air Quality
- 3K Oil Heating
- 56 Pipe Deterioration
- 772 Plumbing
- 5.4K Radiant Heating
- 362 Solar
- 14K Strictly Steam
- 3K Thermostats and Controls
- 51 Water Quality
- 625 Buy, Sell, Barter
- 38 Industry Classes
- 73 Job Opportunities
- 19 Recall Announcements