3000W Chinese Gensets Info.

MrRchitty wrote:


Professor,

Down draft fan? Does this bring all of the heat from the generator across the fan motor? Any problems with that motor handling the heat?

I would like to construct a box using your ideas and would like to know more info about a down draft fan and perhaps where I could purchase one.

Thank you.

Randall,

I have spent hundreds of hours over the past five years researching sound abatement methods that work with the air flow patterns of the Chinese generators. While this thread is massive all the info has been previously posted.

The main consideration is to allow cool air to enter the engine at the recoil starter cover and at the end of the alternator. Hot air from the engine is expelled across the muffler and under the connection of the alternator to the engine. Rather than push air with an auxiliary cooling fan at the engine an exhaust fan that pulls air in and around the components then dumps it out the bottom or back center point works better than any other method I have tried - and I have tried them all. For any enclosure to work well from a cooling standpoint the muffler needs to go outside. The air flow into and out of the enclosure must provide a zero static pressure unless the carburetor air intake is routed to the outside as well so fan speed, blade pitch and CFM can become critical design considerations. You cannot just grab any fan and plug it in.

I prefer to have the fuel tank outside of the enclosure as well which is why I convert to propane (easy conversion) as fuel.

There is way too much stuff to write it all over again. Unfortunately, I do not remember dates for all of the postings.

John Austin recently completed an enclosure project that works extremely well. Look for his postings as well.