3000W Chinese Gensets Info.
professor95 wrote: EDIT ADDED 45/5/2013- When this thread started in March of 2005, I never expected to see it survive this long or amass the quantity of information that has been shared here. In...
Forum Discussion
bobandcat wrote:
The Professor Randy's comment about not using the generator over 2400 watts near 100 degrees ambient was validated by my tests (2200 watts was OK, 2600 watts was not OK).
It is comforting to learn we reached the same conclusion even if it was by different paths.
I'm not sure why I did not pay closer attention when you made the original posting of the graphs in October. I guess I must have been in La La Land at the time with all of the projects I was planning for the new fifth wheel. I am pleased to see the temperatures you recorded are as low as they are – especially with a 98 degree F outside temperature. Obviously your air ducting and air flow paths are optimum for the design of the Chinese open frame genny. There are a lot of similarities with what you, Brad and I did to increase air flow through the shroud fan intake and around the cylinder so that the heated air can be pulled out and away from the recirculation path. A lot of things make more sense to me now than originally. The first thing to design for an enclosure is not sound reduction, but adequate cooling. Once that is accomplished, tuning of the enclosure to reduce noise can be completed. Originally, I was doing the sound reduction design first and letting cooling be secondary – a big mistake!
I have been giving a lot of thought to yet another design that would remove the fan blades from the engine side of the generator head so that I can reverse the air flow thru the generator head and have it all come out the end where the AVR is mounted. This would create a single air path like the Honda and Kipor. There would be an additional ducted air intake at the current lower middle exit point for the generator head, and a heat shield around the muffler with air vents for the cooling air to enter near the manifold. The AVR would be moved to a cooler spot and perhaps even mounted on a heavy aluminum heat sink. The exhaust fan would need to be something like you are using with the capability of creating a vacuum without cavitation of the blades. The squirrel cage or scroll fans are great for that purpose.
OK, enough rambling and babble for tonight. Time to get some sleep.
