Generator 15KW PTO Generator Harbor Freight

[buickanddeere]

Beats me where the idea comes from that fuel consumption will be cut in half by running the tractor at 1/2 of rated pto rpms?
Take that $500 for the gear box and put it in the bank. Take out $5.00 every 24hrs the the tractor is running at rated rpms to deliver 540rpm.

 

[buickanddeere]

If concerned about noise reduction by running at reduced rpms . Purchase a 1800rpm four pole generator. Those lower priced 3600rpm two pole pto generator howl and scream.

 

[buickanddeere]

During hurricane Gustav we were out of power for 3 days and I used a 15KW Generac ultrasource portable gasoline generator to power house. I ran central AC's, water heaters, stove, freezers etc. I did not have any trouble with the power it produced but and noise and fuel consuption were horrible. It produced a very annoying pitch that would fluctuate and keep me up all night. It burned about 1.5 gallon per hour. I sold it right before Hurricane Ike when the demand for generators was high. I then borrowed a 22KW IMD pto generator during hurricane Ike that was much better in both areas. The tractor runs at a constant rpm no matter what load is being put on the generator or what appliances are on in the house. The noise produced is not nearly as loud and aggrivating as the generac. The tractor burned about .85 gal per hour. I just fill up (2) 55 gallon plastic drums before the storm and always have plenty left over. I use a hand pump to fill the generator/tractor. I feel better having diesel around a generator than gasoline. I guess i ran the generator about 12-15 hours a day. I ran it all night to run the AC's and than a few hours during the day. The best thing about using a big whole house generator vs a portable one is using the house wiring and not having to plug and unplug extension cords to power different things. This way whenener you need something just turn on the switch. I feel safer then having extension cords running all over the house with kids around.

Less chance of having diesel fuel stolen than gasoline.

 

[buickanddeere]

I have a Ford 1320 tractor that shows 16.5 HP from the PTO. The tractor motor is 20HP. What will happen if I buy the 65309 Harbor Freight generator. Will it operate? I just need to keep a few lights and ref/freezer going. Not necessarily all at the same time. Everything is 110v. I realize that I would not have maximum rated output.
It would seem that as long as I have the 540RPM from the PTO, I should be OK?
Appreciate the advice.:confused2:

It will carry a 10KW load just fine, maxed out but fine. Doesn't matter 120V or 240V, a watt is a watt.

 

[bjmsam]

Still no explicit or even implied mention of the speed control issue.:confused2:

From the factsheet referenced in my earlier post:

Operating at Half Engine Speed

Farm tractor diesel engines are designed to develop optimum horsepower and torque at a specific rated engine speed.

Operating a tractor with a 1000 rpm PTO at approximately one-half its rated engine rpm to deliver 540 rpm to the generator is not a recommended practice.

Chart 8 shows the results of one test where this mode of operation was attempted. The frequency decreased by 10% when 30 % of rated load was applied and by 16% at 60 % of rated load. Clearly unacceptable, for producing quality power.

Chart 8. Significant change in frequency takes place when operating at half of rated engine rpm.

While the engine horsepower would be significantly reduced at half the rated engine rpm, the bigger problem is that at this speed the engine is operating on the unstable side of the torque curve. An increase in load will cause a reduction in engine speed, which causes a reduction in torque, which causes a reduction in speed, resulting in tractor stalling or speed cycling erratically up and down.

Some tractors are now equipped with an "economy" 540 rpm PTO as well as the "standard" setting. One tractor with this feature was tested. Operating with the "standard" setting produced a 2% drop in frequency from no-load to full-load operation. The frequency drop while operating in the "economy" setting was in excess of 6% for the same loads.

When selecting the engine operating speed to deliver 540 rpm at the PTO:

• set the engine close to manufactures recommended engine speed for 540 rpm
• adjust frequency to 60-62 Hz
• use a factory "economy" setting for light consistent loads
• do not operate your tractor with 1000 rpm PTO and half engine speed.

More discussion here.

 

[buickanddeere]

As mentioned a couple of times already. Running a 15KW generator at 15Kkw is not a good idea. To save copper and money. Machines are rated right to the ragged edge.
If the loads are 10Kw , purchase a 15Kw generator.

 

[SPYDERLK]

From the factsheet referenced in my earlier post:


More discussion here.

Your posts were complete in themselves :thumbsup: ... Stalling of an engine is unlikely enuf to be a bogus claim however. Genny output buckles too quick and deep with rpm loss, thereby the torque to spin it at the reduced rpm can be supported by the bogged engine. Not good for the engine by any means

 

[Soundguy]

Still no explicit or even implied mention of the speed control issue.:confused2:
larry

not explicit but for sure implied.

if your machine hits aload it can't carry since it is outside it's power band, rpm is gonna dip. and that change will be twice as bad at the head.

that's as implied as you can get without being explicit!!

 

[Soundguy]

Beats me where the idea comes from that fuel consumption will be cut in half by running the tractor at 1/2 of rated pto rpms?
Take that $500 for the gear box and put it in the bank. Take out $5.00 every 24hrs the the tractor is running at rated rpms to deliver 540rpm.

it comes from people that skipped math class to go smoke in the bathroom, or sleep in class.

fuel usage is based upon load.

we can calculate electrical load, and we can do a real good estimate of energy available in fuel.

some people mistakenly relate rpm to fuel usage.. vs work performed.

 

[SPYDERLK]

not explicit but for sure implied.

if your machine hits aload it can't carry since it is outside it's power band, rpm is gonna dip. and that change will be twice as bad at the head.

that's as implied as you can get without being explicit!!

Your argument to an explicit statement is to claim to have implied it. Implication leaves too many, possibly wrong, connections to make.