hydrostatic potential energy for beginners
The following figure summarizes a practical example that will serve more than a thousand words.
Imagine a small pond about 30 meters long and 1.5 meters deep at the center.
Also take a drum that has 1500 liters of water and 1.5 meters high. Moved to the center of the pond container opening the valve and allow the filling of the drum to the highest level. The entrance of water through the valve trigger the turbinita that gets in the way from the water of the lagoon and the drum, creating a tension which calculate energy as a second step. Now with the valve closed full drum moved to the opposite bank, in which reverse the transaction, ie we open the valve and evacuated the water to the lake with the same result as in the first operation., Ie doubling the amount of energy. As we have seen (Talking Elephant) The amount of energy has been for each of the two cases, the total weight of water, 1500 kg multiplied by the distance from the center of gravity, which is located in the center of the drum, ie to 0.75 mA what we call potential energy of water stored or hydrostatic.
; , E = P. Hg.
where E is the energy in kilogrameter, P water weight in kg and Hg is the center of gravity height in meters.
; E = 1500 kg 0.75 m = 1125 kilogrameter
If you want other units more useful to our interests, for example in Kilo watt hours, as we have seen is a Kwhora kilogrameter 367000, so a watt hour is 367 kg and 2250 m Kgm Series 6 13 watt hours. What to serve? Is it short or long? Here is a Pilita rechargeable AA is 1.2 volts and 2100 milliamps hour, the classic used for the photo that I took with my digital camera just to
Pilita.
Energy AA = Voltage. Ampere hour =
1.2 V. 2.1 Amp hours = 2.52 watt hours
theoretical load for almost 2 batteries, but remember that between charge and discharge the battery has 70% efficiency with which serves to charge only two AA batteries. Nor is it true that turning on Hydrodynamics Hydrostatic power as a first step and from there into electricity has 100% yield, which be content with 60% and only serve for a stack.
Another way to look for would be used to calculate how long it can remain on a nightlight, for example, 20 LEDs, whose power is 1 watt
Time = Energy / Power = 6.13 watt hours / 1 watt = 6.13 hours
up at this point, my partner always, my friend John, interferes with the following dialog :
Juan- But, Henry ...?
And do not let him finish the sentence because his eyes tells me proud todo.y be a disciple of similar size.
has discovered that the hydrostatic potential energy we have explained is neither more nor less than the same we have spent on lifting the bin loaded with 1500 gallons of water from the bottom of the lake to the height of the bank and mine is as always a learning scheme to force the audience to think and never forget the basics. Indeed lift 1500 kg up to 1.5 meters requires a work of 2250 kg m and hence the accumulation of a mechanical potential energy, which in our case is water. Understand the first step, see if there is another way to supplement the mechanical stress than the contribution of several Iñaki Perurena (Basque Club Character linked to physical prowess). Perhaps the most convenient and easiest way is to place the drum on a quay of the port with the bottom of the pan to the height of low tide level, wait until it reaches high tide, open the valve, letting it fill the pan and wait until the next tide and proceed to the download as it did with the same container but now, without moving. Just wait the time, which depends on location. For the parallels of latitude between 54 to 65 degrees is 12 hours for the rest of the world are every 6 hours. The explanation is another matter, but the concept is clear ... The procedure is very easy to automate, which is why we only need the place where the drum support and we have a battery charger without the intervention of any additional power requirement to pull the failed attempt to land already is us stimulating mind to leave the jokes to increase the size of the pan.
return to the subject, noting that lack the most interesting and before John returns with his leading questions but necessary.
The second alternative, known to hydrostatic potential meaning, it would leave the pan still on a much larger lake (or sea), with the bottom supported on level zero, wait for a wind energy adequate to the waves with the height of the drum and analyzed using the same procedure. To our knowledge the condition would be given for a minimum wind speed of around 7 m / sec (1.5 m significant height) or a 2.5 m / sec (1.5 waves of maximum height). As we can see, with this process, rather than move the drum, which began with the failed experiment, who now moves water and trash, like the tide is still. What is the difference between one and another mechanism? Obviously the time between each sequence. In the case of the tide, we said that once or twice daily. In the case of the wave and the height from 6 to 8.5 seconds. as the universal observations oligrafos million installed worldwide. In other words if the waves Juan can fill your trash from 10 000 to 14 000 times per day with the tide, Is there someone who think that the jug of John is going to spend much more time on the pier when he has the ability to upload daily from 10 000 to 14000 more batteries?
Anyway, although I already know the answer to all my readers who already sympathized with John, I would continue the theme that led to the transfer drum and which is ultimately the process of the voyage. Let's see what really happens when 12 hours elapse from the arrival of low tide. That is the reason why we started moving the pan about 30 meters in the lagoon. Then stay fixed at the dock and eventually locks into a sea as the wave is moving. What if the "gap" in place of the alleged Arbitrary 30 meters had a million times. While the work of the transfer is by a power-consuming process that does not have objections and that's what happens. The reality is that when you put in the dock the vessel is transferred, along with us, thanks to the Earth rotation and a speed higher than sound, so he visited, at the height of Ecuador 40 million meters, Necochea height of 31.5 and in the tidal zone of a single daily 23 million meters and low tide that allowed us to download the drum was in fact far from ocean level to 180 degrees from the face of our planet faced with the moon at that time and that is the true cause, along with the sun, the difference in level at 180 ° difference meridian, the order of five feet or less, and variable according to the relative position of Earth, Sun and Moon. The difference with the start of our experiment is that in this case the earth's rotation who took over the shipment of trash, satisfying the concerns of Juan absolutely right that could not admit that the potential energy of water was the result of an energy mechanic put in play and superior value.
In other words, the gravitational pull distorts the sea in such a way that causes artificial lake whose long instead of 30 meters assumptions has millions of times, the perimeter of our planet and the same depth as we had expected. The figure is in itself telling. Like a world map represented on a different depths is the tide of 1.5 meters, exactly as we did in the beginning, with the difference that long now has millions of times more ... On the other hand, the reality is that the shape of the pond, which was a triangle has now become strictly a sinusoid but the issue is only academic, as are tens of millions of meters long and five feet in height so imperceptible that it is not worth complicating in this first approach.
Note that to represent the figure in a world map with the same scales for both tidal height to length if the scale was 1:1000, the height would be an inch and a half but the length of abscissa graph paper should be 40 miles long. So unusual and unexpected as the free road trip in space traveling from Necochea to Esperance (Australia) 15 500 Km to 1290 Km / hr, 30% faster than a jumbo
Finally, some short paragraph for those who visit us regularly . The first to thank each and every one of the 6000 monthly average that come to our website and the second to apologize that we can not answer the unknowns that manifest themselves indirectly through the search engines. We never thought this answer: but also in the process that involves us. More than half of the visits are for non-English speaking countries who are also going to the appropriate apologies, especially to the Eastern world. Japan, China, Korea, Vietnam, Singapore, Indonesia, India, etc. I always think about what would serve more than 500 people a day in our workshop, having no more than a minute each ... unthinkable without the help of search engines Internet. It is so perfect the system, with some discretion and managed by the results we can see indirectly from the concerns of the public who visit us, their intellectual and educational level and the difficulties facing the encounter a language known both to or less than what happens to us interact with us. I can not understand or justify the patience and the effort made to understand the few signs that I strive to reach them in order to arouse the curiosity of the issues, especially those involving points of view different from the conventional, subject to consideration of the special mentality researchers and teachers involved professionally and socially.
The most appropriate example to synthesize this approach is the subject of ocean energy, or physical oceanography Physical oceanography. A higher percentage of readers who can think well not understand the concept of water potential energy you need for a proper understanding of wave energy and tidal. It is understood, then, that this note is not addressed to those researchers and teachers in the matter but to those inquiring minds, greedy of "know how" but without having had the opportunity to receive education necessary in due course.
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Mr. Enrique O. Nielsen
recommend access to Google search by entering the search word followed by enrique nielsen. Eg energy enrique nielsen
Mr. Enrique O. Nielsen
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