I'll be running another test burn tonight with chains instead of my normal turbulators.
The chains I have are probably a bit smaller than ideal. My HX tubes are about 1 7/8" ID, and the chain links are about 1 1/4" wide.
Any brave souls want to make predictions about flue temps? We have two data points. These are averages over approximately 90 minutes of steady burn at 1200 degree combustion. Combustion temp is measured in the secondary combustion chamber downstream and around a baffle from the active flame area. Flue temp is in the center of the flue right at the outlet of the boiler.
Flue temp with spiral metal turbulators: 495
Flue temp with *no* turbulators: 549
The chains I have are probably a bit smaller than ideal. My HX tubes are about 1 7/8" ID, and the chain links are about 1 1/4" wide.
Any brave souls want to make predictions about flue temps? We have two data points. These are averages over approximately 90 minutes of steady burn at 1200 degree combustion. Combustion temp is measured in the secondary combustion chamber downstream and around a baffle from the active flame area. Flue temp is in the center of the flue right at the outlet of the boiler.
Flue temp with spiral metal turbulators: 495
Flue temp with *no* turbulators: 549
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