| Author |
Message |
bob olson
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, January 29, 2006 - 12:18 pm: | |
I have a 8kw diesel kabota generator.With a remote radiator,how much venilation is needed for the unit itself.I have it in the bagage compartment. |
Jim Stewart (H3jim)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, January 29, 2006 - 12:23 pm: | |
I hvae a 13k Wrico unit with remote radiator and its mounted in a quiet box. I put in a 500 cfm squirrel fan for the unit itself. I insulated the exhaust pretty well, I'm not sure I need all that flow, but it doesn't get hot in the box. |
Chuck Newman (Chuck_newman)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, January 29, 2006 - 12:52 pm: | |
Jim,
I'm looking at mounting an 8KW Wrico unit with remote radiator mounted behind a screen on the side of the bus. The air will go through the radiator and make a 90 dgree turn into another sealed compartment, pass over the gen and then go out through the floor via a squirrel fan.
Is your design similar, or is the air path a straight flow? Do I need to a bigger fan to accomodate the turn? Ideas from anyone appreciated.
Chuck Newman
Oroville, CA |
Luis (Sundancer)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, January 29, 2006 - 3:23 pm: | |
Chuck,
As per instructions from Wrico and others, I installed an 8k kubota in my bus. I built a quiet box for the generator, and circulate air through the box via a small squirrel cage. Then in addition I vent the remote radiator through a larger squirrel cage fan. Those two fans are directly wired to the generator so they run when the generator is running. I've had this setup for a year and have not had any heating problems thus far. It runs at or about 160 degrees. I don't know who you bought your generator from, but if its from Wrico, they have all the instructions you'll ever need.
Luis |
Jim Stewart (H3jim)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, January 29, 2006 - 11:43 pm: | |
Chuck,
Ditto what Luis said. The air that flows over the radiator is completely separated from the generator itself.
Air path for the radiator is straight, while the air path for the generator in the quiet box goes around a bunch of corners to help keep the sound from escaping. Only the low frequencies go around the corners. It does help. |
Richard Bowyer (Drivingmisslazy)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, January 30, 2006 - 9:26 am: | |
Chuck, If it was me, I would check this out with Dick Wright. I do not believe it is a good idea to route the hot air from the radiator over the engine and alternator.
Richard |
C Fred
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, January 30, 2006 - 5:57 pm: | |
Hi Richard, I have all the respect in the world for what you are saying, But I have had three coaches all have had the hot air going over the motor and gen. Had one with 8000 hours no problem and the one that I have now has over 4000 with no problems. I run mine 24-7 when we are on the road change the oil once a week. I hope I haven't hurt it. Fred |
Jim Stewart (H3jim)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, January 30, 2006 - 10:45 pm: | |
As I understand it the main reason for the separate air flows is merely to help isolate the sound. By keeping the radiator flow out of the generator engine compartment, you are reducing the size of the ducting required for het quiet box arraingement.
It does not hurt it, it is just easier and more space efficent to keep it separate for sound reduction considerations. |
Richard Bowyer (Drivingmisslazy)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, January 31, 2006 - 8:48 am: | |
C. Fred, I suspect it would depend on what load you are running on the alternator. The 180 degree air that you are using to cool the alternator (from the radiator) is significantly hotter than the ambient air and if you are running the engine and alternator at full load, or close to it, you stand a chance of exceeding the temperature rating of the alternator. Could only mean decreasing the expected alternator life from 20 years to 10 years, or anything in between.
Depending on the amount of air flow and the genset load, I would suspect the outlet temperature could be in the 240-260 degree range.
Richard |
Marc Bourget
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, January 31, 2006 - 7:41 pm: | |
Richard has it right.
Dick Wright provides respective sizes for the separate fans for radiator and sound box depending on the capacity of the genset.
Inasmuch as the engine makes so much more noise than the sqirrel cage for the radiator only, the inlet/outlet for the combined engine/radiator, would have to be much larger and the outlet "maze" probably much longer to achieve the same quiet operation.
It's better to keep 'em separate.
Onward and Upward |