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...
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I believe most automotive fans can be run at different speeds. Varried by the amount of voltage.
I also believe that the right balance can be found between noise and air current, by varying the speed.
Once the best balance is determined, keep it there.
In the rv compartments with the mesh bottoms, mount the fan on the bottom of that. If it projects below the bottom of the body, put a shroud around it. The fan noise will be directed down.
On an open box, put the fan on top, aimed upward. Again, shroud around it so the sound does not go sideways, but up.
I plan to build a box of concrete blocks. 3 walls of blocks.
The front wall will be plywood and foam. With the fan mounted on the inside front, behind louvers. That wall will be removeable after the top is lifted. The top will be hinged on the back wall.
The bottom rear blocks will be set on their sides, to allow air passage.
There will be a row or two, (vertically), of blocks, 8 inches behind that back wall, to deflect the noise upward. That extra wall will come back along the sides by one block's length.
There will be foam on the concrete floor, Then a piece of plywood that does not reach the walls. The generator will sit on that.
That's as far as I have gotten in design in my head.
Nothing blocks noise like mass.
I am not concerned with weight here, because the generator is not going to be moved.
The point is to keep the neighbors from hearing the generator.
I have been without a generator many times, in power outages, and the neighbors had theirs running 24/7.
That is inconsiderate on several levels. For instance, consider laying in bed at night. The only noise is the sound of the neighbor's generator. And you are either unable to sleep because it is sweltering, or you are freezing your noogies off, and wrapped in every blanket in the house.
I do not wish to do that to my neighbors.
I also believe that the right balance can be found between noise and air current, by varying the speed.
Once the best balance is determined, keep it there.
In the rv compartments with the mesh bottoms, mount the fan on the bottom of that. If it projects below the bottom of the body, put a shroud around it. The fan noise will be directed down.
On an open box, put the fan on top, aimed upward. Again, shroud around it so the sound does not go sideways, but up.
I plan to build a box of concrete blocks. 3 walls of blocks.
The front wall will be plywood and foam. With the fan mounted on the inside front, behind louvers. That wall will be removeable after the top is lifted. The top will be hinged on the back wall.
The bottom rear blocks will be set on their sides, to allow air passage.
There will be a row or two, (vertically), of blocks, 8 inches behind that back wall, to deflect the noise upward. That extra wall will come back along the sides by one block's length.
There will be foam on the concrete floor, Then a piece of plywood that does not reach the walls. The generator will sit on that.
That's as far as I have gotten in design in my head.
Nothing blocks noise like mass.
I am not concerned with weight here, because the generator is not going to be moved.
The point is to keep the neighbors from hearing the generator.
I have been without a generator many times, in power outages, and the neighbors had theirs running 24/7.
That is inconsiderate on several levels. For instance, consider laying in bed at night. The only noise is the sound of the neighbor's generator. And you are either unable to sleep because it is sweltering, or you are freezing your noogies off, and wrapped in every blanket in the house.
I do not wish to do that to my neighbors.
