Q:I'm curious about knowing whats the different them both. Thanks.

A generator is usually powered by a diesel or gas (petrol) engine which powers an alternator to produce mains power for hours provided it is topped up with fuel. A UPS uses a large battery and a high powered inverter circuit to produce mains power but is not expected to power equipment for very long, just long enough to shut them down safely without loss of data.

Q:Hi and thanks for reading.I have a small trailer I am looking for a back up propane generator for.We have wind storms here that knock out power for days on end, about a half dozen times per year, so I'm looking to get some back up electricity, howeverMy lot size is SMALL, so is my trailer. I have a natural gas line, and gas furnace, so I only use about 1500 watts at peak times, so I figure a 3k watt generator will more than cover my needs.SOUND is a huge factor. I have the worst neighbors in the world and I really need something quiet. I'm looking for something with less than 60 ddb.I have seen a lot of propane generators that look good, but I dont know if they can be used with natural gas easily. I think so, but would love to hear if thats true, and they dont have the standby plug feature, which I need to save my fish tank, any know if this can be easily changed by a skilled electrician?Thank you. Any and all help would be greatly appreciated.

I've seen ones running propane, gas and diesel. The larger units for the power you want normally come in their own enclosure helping to keep noise under control. I've not see one designed for natural gas. No propane ones are not designed for natural gas. The engines have to be designed to handle it so you would need to converse with a place selling these to find out if such are available. If not contact the mfrs for information as to this conversion idea. The enhance quiet you can also build an enclosure around the generator which would limit sound travel from the unit.

Q:creating steam turbines that can run on ANYTHING to power the electric generators in modern engines?

Bio fuels are a net energy loss, so converting to diesel would be a step backwards. Even if you could create a steam engine that would run on anything, it would still require fuel. And burning this fuel would create smoke. AKA pollution. To deal with this pollution you'd be required to put massive filter systems on the engines, which makes the engines much heavier which in turn makes them need more power and more fuel. Neither is a good solution.

Q:I have noticed that many people leave their computers on all day for some reason. I would like to know why and if its better or worse for the computer than to just turn it off. Also, is it more efficient to leave it on?Anyway, the only thing I would like to know is why do many people leave their computers on all day and if you are one of them, why?

i leave my computer on 24/7 cause if you keep turning it on or off it is likely that your data maybe lost or one of your components might fail.

Q:I need a silent diesel generator of power capacity of 25 kW, i am going for the following brands(suggest something)1. Jackson Cummins2. Mahindra powerol3. Kirloskar

i have seen Kirloskar unit in an office complex. Seems to be good. No idea about the other two brands.

Q:I want to buy a GENMAX HY6500 GENERATOR FOR 220/240 VOLTS but is wondering if this generator is good. I saw one sold at $1,239 and on another site it was $299.00. I was adviced not to buy Wolf power because of poor customer ratings. I haven't seen any customer rating for GENMAX. I guess this is a Chinese company.The problem I am having in US is that I canot get a 50hz 220-240 volt generators. All I get is 60hz and I am told thy wouldn't work for Africa. Can anybody help?

You can probably get them in Africa proper, and at a better price too, with local support included, minus the shipping cost. When buying a portable generator, check which fuel it uses. Diesel engines last much longer than gasoline. Also, these units are not made to run continuously, but only for emergency or temporary power.and must run isolated from the regular power network. If you want to run more than one and have a small power plant, you need stationary units and a synchronizing panel, with circuit breakers etc. .

Q:What type of diesel engine diesel

Diesel generator is a small power generation equipment, refers to the use of diesel oil as fuel, diesel engine as the prime mover driven generator power generation machinery.

Q:Have a diesel engine that puts out average 3000 RPM and max's out at 3600 RPM I want to belt drive to a generator head that only needs 1800 RPM to operate at 60 hertz what size pulley should I use. Also for further info the shaft on diesel engine is 1 inch and the generator shaft is 42 millimeters

If the engine is likely to be running for a long time, fuel consumption is likely to be important. You want to find out at what RPM the engine produces maximum torque.(If it's a car engine that will likely be related to the cruising speed of the car in top gear) All IC engines are most fuel efficient at the rpm for peak torque. If the engine can make enough power for your requirements at the rpm for peak torque, that's the rpm you should aim to run the engine at. Will depend on the engine of course, but peak torque is usually around about 1/3 of the rev range, I estimate that to be aprox 1800rpm [ie (3600-800)*1/3 +800 ] If aiming for 1800rpm for the generator, with an engine speed of 1800rpm, you don't need to change the rpm at all. That means the pulley's can be the same size, unless the belts slip (flat/ribbed belts slip aprox 3%- probably not enough for you to worry about) So that's the ratio sorted out. Physical size of pulley. All belts have a minimum diameter pulley which they can go around, so long as the pulley is larger there's no problem. Minimum size pulley depends on the thickness, and construction of the belt- and that depends on the power you're transferring via the belt. If you give some indication of the power you're wanting to transfer I'm, sure you get some additional help you'll probably need a governor for the engine to generate at 60Hz give or take a bit. Many diesel engines just have a max/min governor relying on the user to governing the rpm under varying load . You'll need fairly good control for electrically generation, but it needs be nothing much than releasing the throttle a little if the generator is running fast, and if the generator is running slow pressing the throttle. Hope that helps

Q:Diesel trains use electric motors because the low-end torque is much greater than a mechanical drive drive train, I was wondering, since low-end torque is essential to starting with heavy dead weight, why more trucks and SUVs don't have electric motors on the wheels?

For most part, it has to do with reliability. A train runs on a set track, so no ups and downs and bumps and whatnot. Nothing under the tracks that'll come up and snag the bottom, that sort of thing. A truck on the other hand, do drive over things, and the wheels go up and down bazillion times, and all that. A truck's wheel hubs are designed to be as simple and robust as possible for maximum reliability. Adding a motor to the hub would decrease its ground clearance, decrease reliability, and if one of the motors fail the vehicle can't really run on the rest (assuming all wheels are powered) as it produces asymmetrical thrust. So you have to disconnect the matching one on the other side. The designers basically judged that currently, the technology cannot compensate enough for the advantages to outweigh the disadvantages. A while back, Ford was considering a system called gas-operated launch assist. Basically, it operates similar to the way a hybrid stores electricity generated from braking, and releases it back for acceleration. However, instead of doing battery/motor/generator, it uses a compressible gas as the energy storage medium. While driving and braking, gas is compressed into the the cylinder. When the start starts moving again, the gas is allowed to expand, adding a bit of oomph to the launch. Apparently, that idea didn't go anywhere, but it was interesting. And Dodge actually built a special hybrid Durango that only had the gas engine drive one set of wheels, and electricity drive the other set of wheels. It is much easier and cheaper to make than a regular hybrid, but apparently the traction control is giving them problems to coordinate between the two drivetrain systems. --- Kasey C, PC guru since Apple II days Borg Burgers: Have it our way. Yours is irrelevant.

Q:I'm a student majoring in Architecture one of my class, Building Utilities, needs me to survey a high rise building. In my team, we divided the parts bc there are so many and one of my job is to electricity. Can someone explain to me the meaning of phase, R.P.M, power factor, and (especially) their respective units/numbers from this picture

'Phase' has no units: it is merely a number, in this case 3. It is the number of different live supplies coming out of the generator. On the blue label in your picture, to the right of the word PHASE there is a small clear panel. The 3 followed by a greek letter 'phi' is the number of phases. Then there is '4 W'. This tells you that the generator is wired in 'star' layout with a total of four wires. Three carry the live supplies and one is a neutral wire. Your building will have a lot of wall outlets and some heavy loads; for example, the motors for the elevators. The wall outlets are single phase, connected to only one of the phases from the generator. Heavy loads are often connected to all three phases. 'R.P.M'. is revolutions per minute , which means 'how many times the rotating part of the generator rotates in one minute'. 'Power factor' again has no units. An explanation of what it is? I'll come back to that later (or someone else can) .