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Generators and Fuel Flow
A tractor running a pto generator is perhaps the most fuel efficient and reliable way to have emergency portable power. I will explain my setup first.
I have a Ford 1720 with 23.5 pto hp running a generac PTO 25 generator 25000 watts with 50000 surge which is connected to my house with an auto transfer switch. My generator is mounted on forks purchased from Central tractor approx $45.00 this allows my generator to be mounted to my tractor and transported as any other attachment . I performed a fuel consumption test when I first put my systen togeather as follows. First I filled my fuel tank then I transfered the house load to the generator, I asked my wife to do all the laundry she could find and dry it in the dryer which was rated at 5000 watts plus the washer at approx 700 watts and misc items scch as lights and submersible pump 1/2 hp 500 to 700 watts total load = 6200 watts+/-. It takes approx 2 hp to generate 1000 watts so we have 2 x 6.2 = 12.4 pto hp. The test was 8 hours and 20 minutes long and the tractor consumed 5 gallons. Fuel consumption is calculated as follows 5 gallons divided by 8.3 hours = .6 gallons per hour. To determine BSFC (brake specific fuel consumption) you multiply .6 gallons x the weight of diesel fuel which is approx 7.08 lbs per gallon = 4.248 lbs per hour divided by hp 12.4 hp which = .34 lbs per hp hour (BSFC) Keep in mind that this test was not under laboratory controlled conditions so I would not put money on them but they are as close as I can get assuming the load. The advantage of my setup is fuel efficiency and the surge capability to start heavy loads and the fact that my Tractor is always serviced and ready to run. If there was a prolonged outage I could use that heating oil fron my furnace which is #2 oil. As I mentioned earlier my generator is a Generac pto 25 rated @ 25000 watts however due to my 23,5 pto hp 12000 watts is the max I can generate with a surge potental of approx 24000 watts. This allows my systen to start larger motors. My generator also has a frequency meter on it which allows me to set speed, I set the frequency at 62 HZ which allows for speed droop due to electrical loading.
Probably the most important consideration is that it can set indefinately and I do not have to worry about gasoline going bad and guming up the carburator.
Addressing another topic i would like to talk about transfer switches which are absolutely essential to ensure the safty of you, your house and equipment and the utility workers who would be out repairing the utility lines in the event of a power outage because thats when you,d be using it right. If you wired your generator to back feed power into your house and you didn't isolate it from the utility or you FORGOT to throw a breaker then you could charge downed lines that utility workers would assume to be dead and they could end up dead. It wouldn't take the utility long to find the source of power and pin the blame. Think about what would happen when the utility power came back on if you weren't disconnected. Kiss one generator good by and who knows what else.
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