is well known and accepted by experts in autonomous power asynchronous electric motor control of a particular power by a generator involves sizing the generator of the group with 3.5 to 4 times the power of the engine.
Example: to start a 5 HP engine alternator is needed between 17.5 to 20 HP (Kva talking about electrical units). Once started, ie overcome the current power which is forcing this on scaling, the electric motor take the nominal current, only 25 to 28.5% of capacity.
However, let's see what happens to the pulse motor of the group. The alternator should generate 50 Hz forcing the motor shaft directly coupled to it, to work the corresponding synchronous rpm, 1000, 1500 or 3000 rpm depending on whether a generator of three, two, or a pair of poles respectively. In only limited respect the regime of maximum engine rpm match the synchronous, which requires also to accept that the motor impulse in many cases worked to no more than 70% of its maximum capacity, which in In turn, taking into account what was stated in the first paragraph, we are using the diesel engine or gasoline engine in only 17.5 of its maximum power, fuel consuming nonsense, more than double the indicated by the manufacturer of the engine, order of 250/280 grams of oil per Kwhora. What is the solution? ...
What if the engine is required for maximum performance, as is the
stated by the manufacturer for a sufficient time to excess energy accumulated in a temporary storage system and a posteriori, once arrested the group, takes advantage of the excess use it gradually during the rest of the day? ... The specific fuel consumption, even taking into account the accumulation and conversion performance may be reduced considerably as adding to the advantage of uninterrupted power 24 hours a day with just a few hours of operation at full power in the same group. The concept we have called Autonomous Rural Plants and the version we're referring to is the Autonomous Thermal Power Plant, with a diesel internal combustion engine, gasoline engine, a natural gas line, LPG, butane gas, to biodiesel, hydrogen ... or any fuel that comes to mind. If the source of generation change it to a wind generator or hydroelectric turbine will be the same, but without fuel.
As conclusion, we have added the curves of consumption of a gasoline engine displacement of 1900 cc 58.7 hp at 4000 rpm, with specific consumption (in grams per HP hour) for different operating regimes, for 1000, 2000, 3000 and 4000 rpm from no load to full load. Note that 10% of the load (5.8 HP) specific consumption at 1000, 2000, 3000 and 4000 rpm are 500, 650, 800 and 1000 grams of naphtha per HP hour when fully loaded is 250 grams / HPhora. The double, 2.5, 3.2 and 4 times higher consumption of naphtha which corresponds to a well sized and used
If we want to know the hourly consumption of the motor to a power defined, simply multiply the specific consumption of the red curve, expressed in ordinates, for the power to obtain the grams per hour. Example: for a 15% charge, 4, 05 Kw, (green line) is 540 gr ce. / Kwhora. O is 2.187 kg / hour. If desired in liters multiplied by 1.2. For example 2.62 liters per hour.
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recommend joining Google indicating the topic of interest followed by enrique nielsen. Eg solar energy enrique nielsen
Mr. Enrique O. Nielsen
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