Small diesel generators

[jinjimbob]

Tons of these 5000W diesel generators on Ebay...tons! LINKsilent diesel generator items - Get great deals on Business Industrial, Home Garden items on eBay.com!

I'm sure they are all made by the same people in China.
As the ads says "Highest Quality", they wouldn't lie!

 

[Dr_Zinj]

I'm considering a 10KW PTO driven generator for my home.

Any idea about the fuel consumption for it running a 35 hp tractor? I imagine it will mostly be at idle speed.

 

[dex3361]

I'm considering a 10KW PTO driven generator for my home.

Any idea about the fuel consumption for it running a 35 hp tractor? I imagine it will mostly be at idle speed.

You will have to run your tractor at the RPM it takes to reach PTO speed. Most all of the commercially available generators have to run at 540RPM input to make the proper frequency (HZ) at the specific voltage. That said fuel consumption will be dependent on the load.
Running at full load you could expect approximately 0.75 gallon per hour.
Running at half load you could expect approximately 0.35 gallon per hour.
Lower than that load will not make much difference and these numbers will vary wildly sometimes dependent on the machine.

 

[TractorBob1529]

dex3361, TractorBob here...can you give me an update on you Aurora Genny. I was looking to buy the Silent Diesel model, but could not fine any indept review, especially long term ones. Post us what you got...I have another thread that I started to just ask that question. Thanks.

http://www.tractorbynet.com/forums/...ns/227665-aurora-silent-diesel-generator.html

 

[IXLR8]

Well here is an update on the generator. ...snip...
I am going to hook up a power quality meter and see how much harmonic distortion is on the power from the generator.

Did you ever put a power quality meter on the generator? If so, how did it look? I am considering the enclosed unit, any guesses if the brushless generator would have any different (reduced) levels of distortion?

 

[Redneck in training]

Even cheap ($300) digital storage oscilloscope would do it. In example USB based box that you plug to your computer. You can observe the signal for some obvious distortion. Then switch to frequency analyzer mode and look for harmonic content. Pure sine wave has single frequency 60 Hz and none harmonics. The more harmonics you see and the larger is their amplitude the worse is the power. The advantage of power analyzer is that it will quantify it for you as opposed to scope that requires interpretation from acquired data.

While ago I watched few videos on YouTube. Some digitally controlled exciters did very poor job. The conclusion was that analog though not perfect were more consistent in providing reasonable power quality.

 

[jenkinsph]

My experience with the newer equipment in the last 10 yrs or so is the power has been much cleaner than I would have thought. Very easy to remember when running a generator was problematic. We had problems in town this weekend, one of my buddies and I looked at the incoming power on his Fluke 125 scope meter. It was so bad we shut everything down except a few light bulbs for about 5 hours.

While at his house we looked at the output of my Onan CMQD genset on the truck and found it to be clean. I also think the newer controls are alot faster reacting than years ago and are able to hold frequency dead on too. I would have liked to observe the output of my Honda's and Miller welder but maybe next time.

Most of the new consumer electronics can handle quite a bit of noise and distortion too, seems to filter it out remarkably well. You can use an inverter with a modified square wave output and get good results with a new tv or stereo . I was hesitant and a bit cynical about using a cheap inverter in my camper but it has done a good job so far. Can;t see any difference between running the powerline, inverter with batteries or Honda inverter genset they all give good results.

 

[davygp38]

I'm considering a 10KW PTO driven generator for my home.

Any idea about the fuel consumption for it running a 35 hp tractor? I imagine it will mostly be at idle speed.

My buddy, just had to run his PTO generator for several days, and he is not impressed. The power was good 12k pto gen, but the fuel consumption was more than he thought. He was using a 32 hp kubota. He also started to wonder about putting all those hours on his tractor. I would also point out that his unit cost around $1300. for a few hundred more, he could have gotten a stand alone, that his wife could have helped with. I have decided to go with a stand alone, after seeing what he went through.

 

[Redneck in training]

My experience with the newer equipment in the last 10 yrs or so is the power has been much cleaner than I would have thought. Very easy to remember when running a generator was problematic. We had problems in town this weekend, one of my buddies and I looked at the incoming power on his Fluke 125 scope meter. It was so bad we shut everything down except a few light bulbs for about 5 hours.

While at his house we looked at the output of my Onan CMQD genset on the truck and found it to be clean. I also think the newer controls are alot faster reacting than years ago and are able to hold frequency dead on too. I would have liked to observe the output of my Honda's and Miller welder but maybe next time.

Most of the new consumer electronics can handle quite a bit of noise and distortion too, seems to filter it out remarkably well. You can use an inverter with a modified square wave output and get good results with a new tv or stereo . I was hesitant and a bit cynical about using a cheap inverter in my camper but it has done a good job so far. Can;t see any difference between running the powerline, inverter with batteries or Honda inverter genset they all give good results.

Most consumer electronics have switching power supplies now. They care less about the quality of power. The transformer powered devices are much more sensitive.

 

[dex3361]

Did you ever put a power quality meter on the generator? If so, how did it look? I am considering the enclosed unit, any guesses if the brushless generator would have any different (reduced) levels of distortion?

Yes I did put the Fluke 434 power quality meter on the generator but it has been several months back. If I remember correctly the A harmonic distortion was 6%. Voltage and frequency was quit stable.


VOLTS WATTS RPM HZ
242V 0 3640 60.6
242V 100 3640 60.5
240V 1200 3616 60.3
240V 2700 3616 60.3
238V 4200 3598 60.1
236V 5580 3592 59.9