Rod Assemblys
Homemade Biodiesel Processor
Biodiesel is a fuel that is friendly to the environment and can easily be made in your own home using everyday things like waste vegetable oil as your main ingredient. The great thing about biodiesel is that you only need three simple ingredients to make it. All you really need is methanol, new or used oil, and lye.
This is how to build your processor. First of all, you have to set up the drum by cutting a large hole in the top of a steel drum. You then drill a hole about 1.5 inches into the bottom of this drum. Be prepared to attach a pipe to it. Simply weld a pipe the same diameter as the hole to the bottom of the drum.
You will need to attach a brass ball valve to this pipe. This will be your drain valve. Just so you know it does not have to be brass, but using brass makes the valve more durable. Drill another hole into the side of the drum but this time in the bottom, make it the same size as your heater element. Heater elements can be found in old hot water heaters or can be purchased from your local hardware store.
Alright, now go ahead and fit your heater element properly, making sure it is not touching the either side of the drum. The heater element will need to be wired so that it is connected to your power source. The next thing to do is to assemble the chemical mixer. You can do this by attaching one pulley to the rolled steel rod, and then attach the other pulley to the spindle of the electric motor. A propeller has to be welded to the other end of the rolled steel rod. Cheap shelf brackets can be used as propellers.
Attach the rod, pulley and propeller assembly to one side of the hinge. This will allow you to be able to move the mixer in future when necessary. Ok, across the top of the drum, weld a piece of angle iron. This angle iron will be there to offer support for the mixing apparatus. The unattached side of the hinge should then be attached to the angle iron so the propeller and rod assembly sits in the middle of the drum.
With your hinge now fixed it should swing the propeller and rod back and forth. The next step involves you finally mounting the electric motor onto the side of the drum. You should be able to mount the motor directly to the drum without it tipping the drum. Fit a belt to the pulleys and tighten it to desired length by wedging a block of wood into the hinge. A tight belt is necessary to help you to mix the biodiesel in the drum. The last thing you need is a simple measuring stick and you are done.
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If you need more information on homemade biodiesel processor, please visit our website: http://biodieselcorner.com
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Engine efficiency
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Engine efficiency of thermal engines is the relationship between the total energy contained in the fuel, and the amount of energy used to perform useful work. There are two classifications of thermal engines- (1) Internal combustion (gasoline, diesel and gas turbine, ie., Brayton cycle engines). (2) External combustion engines (steam piston, steam turbine, and the Stirling cycle engine). Each of these engines has thermal efficiency characteristics that are unique to it.
Modern gasoline engines have an average efficiency of about 25 to 30% when used to power an automobile. In other words, of the total heat energy of gasoline, 70 to 75% is rejected (as heat) in the exhaust or consumed by the motor (friction, air turbulence, heat through the cylinder walls or cylinder head, and work used to turn engine equipment and appliances such as water and oil pumps and electrical generator), and only about 25% of energy moves the vehicle. At idle the efficiency is zero since no usable work is being drawn from the engine. At slow speed (i.e. low power output) the efficiency is much lower than average, due to a larger percentage of the available heat being absorbed by the metal parts of the engine, instead of being used to perform useful work. Gasoline engines also suffer efficiency losses at low speeds from the high turbulence and head loss when the incoming air must fight its way around the nearly-closed throttle; diesel engines do not suffer this loss because the incoming air is not throttled. Engine efficiency improves considerably at open road speeds; it peaks in most applications at around 75% of rated engine power, which is also the range of greatest engine torque (e.g. in the 2007 Ford Focus, maximum torque of 133 foot-pounds is obtained at 4500 RPM, and maximum engine power of 136brake horsepower (101kW) is obtained at 6000 RPM).
Engines using the Diesel cycle are usually more efficient, although the Diesel cycle itself is less efficient at equal compression ratios. Since diesel engines use much higher compression ratios (the heat of compression is used to ignite the slow-burning diesel fuel), that higher ratio more than compensates for the lower intrinsic cycle efficiency, and allows the diesel engine to be more efficient. The most efficient type, direct injection Diesels, are able to reach an efficiency of about 40% in the engine speed range of idle to about 1,800 rpm. Beyond this speed, efficiency begins to decline due to air pumping losses within the engine.
The efficiency depends on several factors, one of which is the compression ratio. Most gasoline engines have a ratio of 10:1 (premium fuel) or 8:1 (regular fuel), with some high performance engines reaching a ratio of 12:1 with special fuels. The greater the ratio the more efficient is the machine. Higher ratio engines need gasoline with higher octane value, which inhibits the fuel's tendency to burn nearly instantaneously (known as detonation or knock) at high compression/high heat conditions.
It should be noted that at lower power outputs, the effective compression ratio is less than when the engine is operating at full power, due to the simple fact that the incoming fuel-air mixture is being restricted. Thus the effective engine efficiency will be less than when the engine is producing its maximum rated power. One solution to this fact is to shift the load in a multi-cylinder engine from some of the cylinders (by deactivating them) to the remaining cylinders so that they may operate under higher individual loads and with correspondingly higher effective compression ratios. This technique is known as variable displacement.
Diesel engines have a compression ratio between 14:1 to 25:1. In this case the general rule does not apply because Diesels with compression ratios over 20:1 are indirect injection diesels. These use a prechamber to make possible high RPM operation as is required in automobiles and light trucks. The thermal and gas dynamic losses from the prechamber result in direct injection Diesels (despite their lower compression ratio) being more efficient. An engine has many parts that produce friction. Some of these friction forces remain constant (as long as applied load is constant); some of these friction losses increase as engine speed increases, such as piston side forces and connecting bearing forces (due to increased inertia forces from the oscillating piston). A few friction forces decrease at higher speed, such as the friction force on the cam's lobes used to operate the inlet and outlet valves (the valves' inertia at high speed tends to pull the cam follower away from the cam lobe). Along with friction forces, an operating engine has pumping losses, which is the work required to move air into and out of the cylinders. This pumping loss is minimal at low speed, but increases approximately as the square of the speed, until at rated power an engine is using about 20% of total power...(and so on) To get More information , you can visit some products about Tie Rod Assembly, Sharp Copier Parts, . The Dry Chrome Color Wheel products should be show more here!
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