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
Norm and Trey,
You will find a link here for an early web page I created on Comcast. Once there, click on PHOTOS. It shows my initial efforts to obtain sound abatement using an exhaust extension made of EMT running up the ladder on the back of the camper and some open fiberglass batting. It did work to improve the noise level. This was the experiment that resulted in my discovery that the exhaust was not the major source of noise on this family of generators.
As far as temperatures inside an enclosure...... I do not know what the upper operating limits are for the engine and fuel system. But I do know that anything over 194 degrees F (90 C) will cause permanent damage to the wiring inside the generator. Just to be safe, I would work to keep these temperatures at or below 167 degrees F (75 C). It is not just engine heat that causes a temp rise in the wiring, but the flow of current in the conductors. So, be careful, on a hot day with the AC running these temps could potentially soar above safe levels - maybe even without an enclosure!
Since the muffler on these units is right next to the generator assembly, I agree that it would be a good idea to move the muffler to another location when placing the genny in an enclosure. 1" EMT works well for exhaust pipe and is available at any home store selling electrical supplies. Some welding, brazing or silver brazing may be necessary to get what you need. Tin/Lead Soldering WILL NOT WORK. Solder will flow like water once the exhaust gets hot.
There are at least two simple ways to monitor temps in an enclosure. The simplest is a non-contact infrared themometer. I use one of these all the time on my RV to check wheel bearings, water heater temp, grill temp, oven temps, etc. Harbor Freight Tools has these on sale almost every month for $50. The other is a simple remote digital meat themometer. Big Lots has sold these in the past for about $6. They have a 6' flexible extension probe and are also great to tell when your RV water is hot enough to shower (stick the probe under the insulation next to the tank, run the metal shielded silicon jacketed wire to the meter in a convenient location inside the camper).
Lots of good ideas coming in on the forum for reducing noise. I hope we will see more, especially those that have been actually built and tested.
You will find a link here for an early web page I created on Comcast. Once there, click on PHOTOS. It shows my initial efforts to obtain sound abatement using an exhaust extension made of EMT running up the ladder on the back of the camper and some open fiberglass batting. It did work to improve the noise level. This was the experiment that resulted in my discovery that the exhaust was not the major source of noise on this family of generators.
As far as temperatures inside an enclosure...... I do not know what the upper operating limits are for the engine and fuel system. But I do know that anything over 194 degrees F (90 C) will cause permanent damage to the wiring inside the generator. Just to be safe, I would work to keep these temperatures at or below 167 degrees F (75 C). It is not just engine heat that causes a temp rise in the wiring, but the flow of current in the conductors. So, be careful, on a hot day with the AC running these temps could potentially soar above safe levels - maybe even without an enclosure!
Since the muffler on these units is right next to the generator assembly, I agree that it would be a good idea to move the muffler to another location when placing the genny in an enclosure. 1" EMT works well for exhaust pipe and is available at any home store selling electrical supplies. Some welding, brazing or silver brazing may be necessary to get what you need. Tin/Lead Soldering WILL NOT WORK. Solder will flow like water once the exhaust gets hot.
There are at least two simple ways to monitor temps in an enclosure. The simplest is a non-contact infrared themometer. I use one of these all the time on my RV to check wheel bearings, water heater temp, grill temp, oven temps, etc. Harbor Freight Tools has these on sale almost every month for $50. The other is a simple remote digital meat themometer. Big Lots has sold these in the past for about $6. They have a 6' flexible extension probe and are also great to tell when your RV water is hot enough to shower (stick the probe under the insulation next to the tank, run the metal shielded silicon jacketed wire to the meter in a convenient location inside the camper).
Lots of good ideas coming in on the forum for reducing noise. I hope we will see more, especially those that have been actually built and tested.
