Outdoor Wood Furnace Info

All-Purpose OWF Discussions => General Outdoor Furnace Discussion => Topic started by: robdogtn on September 30, 2016, 12:25:03 PM

Title: water to water exchangers
Post by: robdogtn on September 30, 2016, 12:25:03 PM: quick question on installation. Does it matter if I swap the inputs, ie, instead of going in A1 and coming out A2 for the hot water, can I go in A2 and out A1? I wouldn't think it would matter if the insides of the exchanger are the same.

If not no big deal just trying to save some labor and rework on my layout.
Title: Re: water to water exchangers
Post by: mlappin on September 30, 2016, 09:30:33 PM: Input and output doesn’t matter as long as you have a cross flow, IE if your boiler water comes in one end you want your domestic water to enter the other end and exit the end your boiler water enters, this gains the most heat transfer.
Title: Re: water to water exchangers
Post by: fireboss on October 01, 2016, 06:20:40 AM: Make sure it's plenty big enough! Bigger is better! And plan on putting some boiler drains so you can back flush it to clean it if you have to!
Title: Re: water to water exchangers
Post by: braveblaster on October 29, 2016, 05:31:10 PM: Quote from: mlappin on September 30, 2016, 09:30:33 PM
Input and output doesn’t matter as long as you have a cross flow, IE if your boiler water comes in one end you want your domestic water to enter the other end and exit the end your boiler water enters, this gains the most heat transfer.
Am sure you are 100% correct but the wording got me lost (not your fault) could you draw something to explain this so I can get it right? Thanks
Title: Re: water to water exchangers
Post by: RSI on October 29, 2016, 05:35:34 PM: You just want flow going opposite directions.
Title: Re: water to water exchangers
Post by: Roger2561 on October 30, 2016, 04:20:30 AM: Quote from: braveblaster on October 29, 2016, 05:31:10 PM
Quote from: mlappin on September 30, 2016, 09:30:33 PM
Input and output doesn’t matter as long as you have a cross flow, IE if your boiler water comes in one end you want your domestic water to enter the other end and exit the end your boiler water enters, this gains the most heat transfer.
Am sure you are 100% correct but the wording got me lost (not your fault) could you draw something to explain this so I can get it right? Thanks

Braveblast - I hope this helps to visualize what they are saying. Roger
Title: Re: water to water exchangers
Post by: slimjim on October 30, 2016, 04:24:54 AM: well done Roger!
Title: Re: water to water exchangers
Post by: Roger2561 on October 30, 2016, 04:44:31 AM: Quote from: slimjim on October 30, 2016, 04:24:54 AM
well done Roger!

Thanks. I'm learning from a good teacher.

For some people, me included, pictures are worth more than 1000 words. Roger
Title: Re: water to water exchangers
Post by: Revx1000 on October 31, 2016, 06:58:45 PM: He is a pic of what I did , better to have your return line going back to the boiler on the bottom less chance of sediment dropping off in the exchanger