T
[email protected]
- Jan 1, 1970
- 0
Dang! Lost Nick Pine's post on exhaust gas heat recovery for domestic
hot water.
In it he suggested running the exhaust through a 50' coil of soft
copper in a wash tub of water. (Hope I got that right.)
Exhaust back-pressure consideratons dictate that the tube be fairly
large diameter. Resonance in this tube will affect the engine's
operation. (Remember the farting sound of a school bus' exhaust at
a particular engine speed?)
I was concerned about resonance effects when extending the exhaust
line of my Onan 2 cylinder 1800 RPM generator
upward. The 1.5" OD of an electrical conduit fit inside some
flexible pipe from a NAPA auto parts store, so I could adjust the
length to tune the exhaust pipe. At 11 ft. there was a distinct
change in the exhaust sound (sharper), closely matching the length a
physicist friend had calculated.
Tom Willmon
near Mountainair, (mid) New Mexico, USA
Net-Tamer V 1.12.0 - Registered
hot water.
In it he suggested running the exhaust through a 50' coil of soft
copper in a wash tub of water. (Hope I got that right.)
Exhaust back-pressure consideratons dictate that the tube be fairly
large diameter. Resonance in this tube will affect the engine's
operation. (Remember the farting sound of a school bus' exhaust at
a particular engine speed?)
I was concerned about resonance effects when extending the exhaust
line of my Onan 2 cylinder 1800 RPM generator
upward. The 1.5" OD of an electrical conduit fit inside some
flexible pipe from a NAPA auto parts store, so I could adjust the
length to tune the exhaust pipe. At 11 ft. there was a distinct
change in the exhaust sound (sharper), closely matching the length a
physicist friend had calculated.
Tom Willmon
near Mountainair, (mid) New Mexico, USA
Net-Tamer V 1.12.0 - Registered