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  • buenijo's Avatar
    07-31-2020, 05:22 PM
    The damper is installed under the base and the new blower fan is contained inside a small steel cap that press fits on the the damper. The purpose of this approach includes: (1) the fan can be easily removed by disconnecting the power supply cord and removing the cap that contains the fan, (2) closing the damper cuts off all air to the furnace while also isolating the fan from any smoke generated from the furnace. Assuming the furnace ever tests well, and assuming I ever advance the project to install a steam generator, then the damper will be fitted with an extension spring and solenoid latch configured to shut the damper on high steam generator pressure OR high exhaust temperature. ADDENDUM: There will be another long delay before any meaningful progress can be made. I attempted another test without success - and identified a couple problems. I have to assemble another furnace. At least the new damper proved to be an excellent idea. I closed the damper and capped the furnace for cool down, then just popped off the fan.
    19 replies | 2948 view(s)
  • buenijo's Avatar
    07-16-2020, 02:59 PM
    I've been brainstorming the problem with the furnace. I now believe the main problem is OPERATOR ERROR. The blower fan pushes too much air, and this is producing a weak fuel gas that is further cooled and diluted with excess secondary air in the combustion chamber. I purposefully selected a new blower fan I knew to be more powerful than required (I figured I would just dial down the output with a controller). However, I did not expect the fan to push so much air as to prevent furnace operation. I got lazy. I should have had the controller on hand. I ordered a fan speed controller and purchased plugs for the furnace air supply holes. This will allow control of the air flow rate and the mixture. ADDENDUM: Unfortunately, my very limited electronics knowledge got me in trouble. The blower fan is amazing, but both too powerful and apparently too sophisticated. It cannot be controlled with a conventional pwm speed controller, and I am not paying for a fancy unit. Also, the cut in voltage is too high for rheostat control. So, I had to get a new fan. Good news is the new fan is much cheaper. BTW, I got the fancy fan for free. Also, I arrived at an elegant way to install the blower fan to the furnace base that incorporates a damper. This damper will eventually be part of a control system that is critical to operation. The damper was going to be placed elsewhere, but I realized this new location is superior. In fact, it solves several problems. Yeah, I know things are moving slowly - but I expected these kinds of problems. The devils are in the details - and why R&D is so expensive.
    19 replies | 2948 view(s)
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  1. I began studying politics in 2002 after returning from Afghanistan on active duty military service. I quickly discovered Ron Paul. I started studying economics in 2005. By late 2005 I was buying gold and silver bullion for long term savings. Few individuals today have a clear understanding of economics. What remains of the U.S. Republic is in constant danger of destruction as long as this condition persists. As the inevitable economic collapse continues, the ignorant public will blame what they incorrectly believed to be a "free market" and "capitalism". They will then likely abandon what liberty remains for greater central control.
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About buenijo

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About buenijo
Navy veteran. Degrees in math and physics.
Alternative energy. Economics. Political philosophy. Exotic reptiles.
Whatever pays the bills.
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Computer and Technical:
Scientists and Engineer


“The beginning of wisdom is to call things by their proper name.” - Confucius.
"When plunder becomes a way of life for a group of men living together in society, they create for themselves in the course of time a legal system that authorizes it and a moral code that glorifies it." - Frederic Bastiat
"Being well adjusted to a sick society is not a measure of health." - Jiddu Krishnamurti


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