vapor vacuum with reverse tankless coil?

Eastman

Has anyone tried using a reverse tankless coil teamed with a modcon?  Boiler sized for EDR, modcon sized for heat loss or domestic water.  The idea being to inject btu's into the system after it's fallen into vacuum.

pipeking

huh?

mod/con steam?

Eastman

seams like a possible solution

Steam boilers can have tankless coils, right? 



Once a vac is induced in the system, why not continue the residual boil using the tankless coil?  I see a two main benefits leading to improved performance.  First, a hard vacuum is prevented which reduces infiltration and steam disruption from unvented air.  Second, a softer longer cycle is produced.



These are features that are reminiscent of the coal fueled boilers that vacuum apparently excelled with.

ShawnG

1900s vapor vacuum system

Hi. I live in a very old house with a 100 year old vapor vacuum system. It gives beautiful heat but recently the oil company didn't fill my tank and we ran out of oil. After that, the far wing of the house will not heat. No one at the repair company knows what to do. Is there anyone out there that knows someone who understands these old systems?

Thanks,

Shawn

Eastman

Shawn, look around on the site...

There are resources for homeowners in your position.  Dan Holohan has also published several books that discuss these systems.  I can't help you, but if you start a new thread others more capable will see the post and chime in.

SWEI

residual boil

I must be missing something here - couldn't you just continue firing the main burner?

ShawnG

Thank you

Thank you for responding. I posted on the geneal page and a gentleman who has a similar system responded- giving me hope. I am a single mom, so my abilities to read and fix the system are slim. But perhaps Dan might be able to help me locate someone in ct that knows how to work on these old vapor vacuum systems.

Thank you again.

Shawn

Eastman

concept is to run closer to equilibrium

The burner is sized to the system's EDR at 212.  If another smaller heat source can take over once a vacuum has been induced, I feel the system could recover the coal burning characteristics that they originally possessed.

ChrisJ

Burner

So install two gas valves set to different pressures.



Or, install two manifolds and fire one or both.  Just ideas I'm throwing out there.

Eastman

this can be done?

Can this be done without a power burner?

SWEI

not likely

I just can't see the additional cost of a mod/con, tankless coil, controls and installation penciling out here.

Eastman

Relative cost

Yeah, but in terms of restoring a system to its coal burning like functionality, what options are available at the residential level?

Eastman

doesn't have to be a modcon

A low output two stage copper tube unit perhaps.