generators

• Question:-Generators?
  I really don't understand. They say a big $1000 generator can only run for like 12 hours. Then you got to refill it, and each fill costs like $15??? But obviously you can run the electicity in your car for like months, am I right. And what is it in your car that lets you do that and how much does it cost? So can you buy one of those things seperately and use it for stuff like a small fridge, a tv, heater, so on... instead of a generator because its cheaper and runs longer???
  
  Answer:-it won,t put out the voltage to run your house
• Question:-generators?
  where can i find a sketch of a generator?
  (all its asking for is a generator, but im assuming a DC generator because the question that follows asks to explain what a DC generator does and how it works)
  
  
  I found the percent efficiency of a motor generator system. the efficiency was very low.
  where was the rest of the energy most likely lost to?
  (it was a basic motor system.
  battery ->
  switch ->
  motor 1 ->
  motor 2 (now acting as a generator because motor 1 is spinning it) ->
  light bulb)
  
  what impact do generating plants have on our environment?
  
  
  appreciate any help i can get.
  
  thanks.
  
  Answer:-there is an equivalent circuit diagram and other pictures on http://en.wikipedia.org/wiki/Electrical_generator
  you could also just try google image.
  
  energy from a genset can be lost to both heat and friction. Many electrical generators are powered by diesel engines. Generating plants that run off of petrol diesel emit sulfur dioxides, carbon, and other nasty junk into the atmosphere. Hydro generators (from dams) mess up the ecology of a river or lake and changes the geology of the surrounding area.
• Question:-Are generators allowed at national parks in the United States?
  Does anyone know if generators are allowed at campsites in national parks in the United States? I searched the National Park Service website, but couldn't find any overall policy statements regarding generators--just a couple of specific cases and exceptions. Thanks!
  
  Answer:-The rules are set by the individual park superintendents, and can vary from one campground to the next. Here in Death Valley, there are generator hours in most of the campgrounds. You need to go to the individual park website (they all can be found at nps.gov -- unless you are looking at USFS or BLM recreation areas) and find out the rules at the particular park and its campgrounds.
• Question:-How are different AC generators linked in a power grid?
  I've often wondered this. When you have two or more AC generators (say two different power plants) produce power, it seems like it would be impossible to be sure the two are in phase with each other. So how can the two be linked into a power grid? Is the same technique used when hooking up a home generator (from a wind turbine, for example) to supply the grid?
  
  Answer:-No. It's actually rather simple to keep them running synchronously on the power grid. All it takes is a simple phase comparator and a feedback control system to regulate the generator.
  
  Doug
• Question:-How do you connect 2 basic generators together in series, to power a house?
  Generators are typical small ones that are usually bought at Lowes or a Home Depot. I want to hook them together to power my house.
  
  Answer:-I could give you a lot of techno speak to tell you why, but the bottom line is that it is totally impractical to wire them together. You can not syncronize them and that is manditory if they are connected together.
  
  In any case, it would be in parallel, not in series. Since it is impractical, that is a moot point too.
  
  A better idea is to split your house into two separate sections. One would be powered by each of the two generators. This is not that easy to do for most houses if you want 220v available. I will explain that in a minute.
  
  If you only need 110v, you can connect one generator to each side of your breaker box's main lug. It is obviously critical to make sure you are totally disconnected from the power company's grid when you do this. If you are connected, it will cause a world of hurt. You must be sure about this.
  
  Also be aware that the 110v output of the generator is probably not going to give you as much amperage as you expect. This is quite doable if you know enough about electricity to do it safely.
  
  That is the practical answer. A purely theoretical one would be to partition your breaker box into two sections. Each section would be 220v, just like the power from the power company. One generator would power one section, the other would power the other section.
  
  The reason that is not practical is that you cannot easily partition the breaker box. A breaker box has only one main bus for each side. For this to work with one box, it would have to have two main busses for each side. It is totally impractical for most uses. If it was really important to do this, a better idea would be to have two independent breaker boxes.
  
  Each would be powered from the power company as normal. If you needed to go "off grid," you would disconnect each box from the power company and connect the one generator to each box.
  
  This would allow you to use the maximum practical power from each generator and would be easy to cut over from power company to generator and back.
  
  The drawback is that you need a much more complicated breaker box setup. Most people would find this impractical.
  
  Again, it is critical to life and property that you know what you are doing and that you do it properly. This is not something to design yourself, especially if you think there was a way to connect them in series.
• Question:-How does one find the number of generators of a cyclic group?
  I have been given two cyclic groups, one of order 8 and one of order 60. No specifications beyond that. How do I find the number of generators of each?
  
  Answer:-The number of generators for a cyclic group of order n is φ(n).
  
  φ(n) denotes Euler's phi function, which counts the number of positive integers up to n which are relatively prime to n.
  
  Facts:
  (i) φ(ab) = φ(a) φ(b) if gcd(a, b) = 1
  (ii) φ(p^n) = p^n - p^(n-1) if p is prime.
  -----------------------
  1) There are φ(8) = 2^3 - 2^2 = 4 generators for a cyclic group of order 8.
  
  2) There are φ(60) = φ(2^2) φ(3) φ(5) = (2^2 - 2) * 2 * 4 = 16 generators for a cyclic group of order 60.
  
  I hope this helps!
• Question:-Are thermoelectric generators and coolers just the same in their structure?
  I am doing an experiment with thermoelectric generators.
  I need a lot of those things but the problem is that they're just too expensive. But when it comes to thermoelectric coolers, they seem to be cheaper.
  
  Can a thermoelectric cooler be used to generate electricity?
  
  Answer:-Essentially yes, though I'm not sure the components in a TE cooler are designed for it to work as a thermoelectric generator. I suppose it's worth a shot
  
  A TE cooler is, in theory, just a thermocouple, where the current is forced to run in the opposite direction; this causes one end to become warm and the other end to cool. The major difference is how the unit is designed to handle heat flow, which is why such a cooler may not work as a thermal pile.....
• Question:-What type of equipment would i use to monitor generators and transformers?
  What type of equipment would i need use to monitor generators and transformers either in a small or large industrial place?
  
  Answer:-AC current meter , volt meter and frequency counter if it is AC.
• Question:-How to destroy the generators with the Death Ray in Fallout 3?
  I shoot the gun then all the generators come up and I hit the switches and they just go down.
  
  Answer:-In the Death Ray room, there are 4 of the generators. You need to visit the console 4 times.
• Question:-How do I make my own wind power generators?
  I want to make my own wind power generator at home because I want to use it to power my laptop and a small portable TV. How do I go about building wind power generators?
  
  Answer:-I make my 2 wind power generators at home and you will need
  a generator, blades battery and inverter.
  
  I use them to power my lighting along my balcony.
  
  Actually I got the infomation from http://www.makewindpowerathome.com. Thats where I got my blade designs from and learnt how to wire it up.. Its saving me some good money :)

generators

• Question:-Generators?
  I really don't understand. They say a big $1000 generator can only run for like 12 hours. Then you got to refill it, and each fill costs like $15??? But obviously you can run the electicity in your car for like months, am I right. And what is it in your car that lets you do that and how much does it cost? So can you buy one of those things seperately and use it for stuff like a small fridge, a tv, heater, so on... instead of a generator because its cheaper and runs longer???
  
  Answer:-it won,t put out the voltage to run your house
• Question:-generators?
  where can i find a sketch of a generator?
  (all its asking for is a generator, but im assuming a DC generator because the question that follows asks to explain what a DC generator does and how it works)
  
  
  I found the percent efficiency of a motor generator system. the efficiency was very low.
  where was the rest of the energy most likely lost to?
  (it was a basic motor system.
  battery ->
  switch ->
  motor 1 ->
  motor 2 (now acting as a generator because motor 1 is spinning it) ->
  light bulb)
  
  what impact do generating plants have on our environment?
  
  
  appreciate any help i can get.
  
  thanks.
  
  Answer:-there is an equivalent circuit diagram and other pictures on http://en.wikipedia.org/wiki/Electrical_generator
  you could also just try google image.
  
  energy from a genset can be lost to both heat and friction. Many electrical generators are powered by diesel engines. Generating plants that run off of petrol diesel emit sulfur dioxides, carbon, and other nasty junk into the atmosphere. Hydro generators (from dams) mess up the ecology of a river or lake and changes the geology of the surrounding area.
• Question:-Are generators allowed at national parks in the United States?
  Does anyone know if generators are allowed at campsites in national parks in the United States? I searched the National Park Service website, but couldn't find any overall policy statements regarding generators--just a couple of specific cases and exceptions. Thanks!
  
  Answer:-The rules are set by the individual park superintendents, and can vary from one campground to the next. Here in Death Valley, there are generator hours in most of the campgrounds. You need to go to the individual park website (they all can be found at nps.gov -- unless you are looking at USFS or BLM recreation areas) and find out the rules at the particular park and its campgrounds.
• Question:-How are different AC generators linked in a power grid?
  I've often wondered this. When you have two or more AC generators (say two different power plants) produce power, it seems like it would be impossible to be sure the two are in phase with each other. So how can the two be linked into a power grid? Is the same technique used when hooking up a home generator (from a wind turbine, for example) to supply the grid?
  
  Answer:-No. It's actually rather simple to keep them running synchronously on the power grid. All it takes is a simple phase comparator and a feedback control system to regulate the generator.
  
  Doug
• Question:-How do you connect 2 basic generators together in series, to power a house?
  Generators are typical small ones that are usually bought at Lowes or a Home Depot. I want to hook them together to power my house.
  
  Answer:-I could give you a lot of techno speak to tell you why, but the bottom line is that it is totally impractical to wire them together. You can not syncronize them and that is manditory if they are connected together.
  
  In any case, it would be in parallel, not in series. Since it is impractical, that is a moot point too.
  
  A better idea is to split your house into two separate sections. One would be powered by each of the two generators. This is not that easy to do for most houses if you want 220v available. I will explain that in a minute.
  
  If you only need 110v, you can connect one generator to each side of your breaker box's main lug. It is obviously critical to make sure you are totally disconnected from the power company's grid when you do this. If you are connected, it will cause a world of hurt. You must be sure about this.
  
  Also be aware that the 110v output of the generator is probably not going to give you as much amperage as you expect. This is quite doable if you know enough about electricity to do it safely.
  
  That is the practical answer. A purely theoretical one would be to partition your breaker box into two sections. Each section would be 220v, just like the power from the power company. One generator would power one section, the other would power the other section.
  
  The reason that is not practical is that you cannot easily partition the breaker box. A breaker box has only one main bus for each side. For this to work with one box, it would have to have two main busses for each side. It is totally impractical for most uses. If it was really important to do this, a better idea would be to have two independent breaker boxes.
  
  Each would be powered from the power company as normal. If you needed to go "off grid," you would disconnect each box from the power company and connect the one generator to each box.
  
  This would allow you to use the maximum practical power from each generator and would be easy to cut over from power company to generator and back.
  
  The drawback is that you need a much more complicated breaker box setup. Most people would find this impractical.
  
  Again, it is critical to life and property that you know what you are doing and that you do it properly. This is not something to design yourself, especially if you think there was a way to connect them in series.
• Question:-How does one find the number of generators of a cyclic group?
  I have been given two cyclic groups, one of order 8 and one of order 60. No specifications beyond that. How do I find the number of generators of each?
  
  Answer:-The number of generators for a cyclic group of order n is φ(n).
  
  φ(n) denotes Euler's phi function, which counts the number of positive integers up to n which are relatively prime to n.
  
  Facts:
  (i) φ(ab) = φ(a) φ(b) if gcd(a, b) = 1
  (ii) φ(p^n) = p^n - p^(n-1) if p is prime.
  -----------------------
  1) There are φ(8) = 2^3 - 2^2 = 4 generators for a cyclic group of order 8.
  
  2) There are φ(60) = φ(2^2) φ(3) φ(5) = (2^2 - 2) * 2 * 4 = 16 generators for a cyclic group of order 60.
  
  I hope this helps!
• Question:-Are thermoelectric generators and coolers just the same in their structure?
  I am doing an experiment with thermoelectric generators.
  I need a lot of those things but the problem is that they're just too expensive. But when it comes to thermoelectric coolers, they seem to be cheaper.
  
  Can a thermoelectric cooler be used to generate electricity?
  
  Answer:-Essentially yes, though I'm not sure the components in a TE cooler are designed for it to work as a thermoelectric generator. I suppose it's worth a shot
  
  A TE cooler is, in theory, just a thermocouple, where the current is forced to run in the opposite direction; this causes one end to become warm and the other end to cool. The major difference is how the unit is designed to handle heat flow, which is why such a cooler may not work as a thermal pile.....
• Question:-What type of equipment would i use to monitor generators and transformers?
  What type of equipment would i need use to monitor generators and transformers either in a small or large industrial place?
  
  Answer:-AC current meter , volt meter and frequency counter if it is AC.
• Question:-How to destroy the generators with the Death Ray in Fallout 3?
  I shoot the gun then all the generators come up and I hit the switches and they just go down.
  
  Answer:-In the Death Ray room, there are 4 of the generators. You need to visit the console 4 times.
• Question:-How do I make my own wind power generators?
  I want to make my own wind power generator at home because I want to use it to power my laptop and a small portable TV. How do I go about building wind power generators?
  
  Answer:-I make my 2 wind power generators at home and you will need
  a generator, blades battery and inverter.
  
  I use them to power my lighting along my balcony.
  
  Actually I got the infomation from http://www.makewindpowerathome.com. Thats where I got my blade designs from and learnt how to wire it up.. Its saving me some good money :)

national grid

• Question:-Who is National Grid and what do they do?
  I saw a cute polar bear commercial and I believe it is for National Grid. Who are they and what do they do?
  
  Answer:-Somebody's gotta run the power lines, right? They're not run by the government. They're owned and/or operated by various utility companies, and in the northeastern US that's a company called National Grid.
  
  It's not actually "national" in the sense of being the whole US. In fact, it's not even a US company at all. They're a British company, originally formed when the British privatized their national power grid in the early 1990s. They took over the work that used to be run by Keyspan Energy in the US a few years ago.
  
  So what they do is build power lines, maintain power lines, measure power flowing through lines, and make sure that the power gets from the power plant to your house (and that you've billed appropriately for it). They also connect to OTHER power grids, to make sure they have power during failures.
  
  They also do some side business in natural gas.
  
  The commercial is presumably part of a "don't blame us for global warming" charm offensive, with the intent of laying the groundwork to keep people from voting to regulate them too harshly. They've got a horrifyingly bad flash-only web site on the subject at the source below.
• Question:-Why are transformers used in the National Grid to produce high voltages for transmission?
  Why are transformers used in the National Grid to produce high voltages for transmission?
  
  Answer:-There is less power loss if you push a small current with a high voltage than if you push a high current with a small voltage.
  
  A transformer will increase (or decrease) the voltage depending on how it is set up. A transformer is basically a metal doughnut usually iron cos being magnetic is very important. The doughnut has coils of wire wrapped around it that will have a current passed through it. The electric current induces a magnetic field and will induce an electric current in another coil wrapped around the core.
  
  Vs/Vp = Ns/Np
  
  is the equation where Vs is the induced voltage in the secondary coil Vp is the voltage in the primary Ns is the number of coils in the secondary coil and Np is the number in the primary.
  
  So... with a higher voltage less current will pass through the wires meaning that less of the energy is lost due to the resistance of the wire.
• Question:-The cost due to heat loss in the cables of the National Grid goes down as the cable is made thicker. Why?
  And also:
  The cost of installing the cables of the National Grid goes up as the cable is made thicker. Why?
  
  These questions are in relation to transformers.
  
  Answer:-According to Laws of Resistance,
  Cross sectional area of conductor is inversely proportional to the resistance of the conductor.
  So, the thicker is the cable, the less resistance it offers and consequently less heat (loss) is produced.
  
  But certainly thicker cable needs more money than a thin cable. So, cost goes up in this case
  nAzMuL
• Question:-Does National Grid control all of the electricity in the US, or are there other electric companies in the US?
  I heard that the National Grid was the only company in the US that controls the electricity. Is this true or are there other companies other than National Grid that control the electricity?
  
  Answer:-There is a national grid but it is owned by several companies. There is no monopoly.
• Question:-How long has national grid been in business for?
  How long has national grid been in business for?
  
  Answer:-2 years.
• Question:-Do I need a generator while I receive adequate power supply from national grid?
  I heard people saying that you should have a generator for better performance. But my national grid power supply is sufficient. Do you think that I should think of buying a generator?
  
  Answer:-Hardly you can find anybody who didn’t face the harsh reality to watch his favorite electrical goods damaged by power fluctuations. National grid offers sufficient power supply at very economic rate and is available almost everywhere. So, everybody uses this power supply and so you think.
  But, the situation is not always so comfortable as you think. Due to several reasons, the power supply may interrupt suddenly, there may be burn out or wire damages or transformer damages. The sudden fluctuation or huge spike can damage your electrical goods. You may see your favorite refrigerator crashed or TV burnt out or room heater spoiled. To get rid of these calamities, you need to use a device that can ensure consistent power supply at fixed frequency. A generator can do this for you, it ensures the frequency level with it built in AVR technology.
• Question:-how does a small wind turbine feed current into the national grid?
  For instance if the turbine has 2 spare amps of current, how could this be fed into a national grid of several hundreds of amps? A car charger works by exceeding the charge voltage of the battery, but of course you can't do this to the national grid.... can you?
  
  Answer:-Of course it does - it has to - but what it really (normally) does is supply power to the house so the amount coming off the grid is reduced - the inverter from the batteries supplied by the wind turbine produces one volt or so more than the grid. If the wind turbine can produce enough power to meet all the needs of the local place, and the power company supplier allows it, then the turbine can "reverse" the meter and push amps into the grid to be used by someone down the street (commonly there are two meters to keep track of how much is fed back) who doesn't care where the amps come from as long as they cycle exactly in time with the grid.
• Question:-Why are the cables of the national grid carried high above the ground?
  Why are the cables of the national grid carried high above the ground rather than being buried underground? Thanks
  
  Answer:-In UK the national grid voltage is 400,000 volts or 400KV
  
  At this voltage the thickness of insulation required to make the cables safe would be huge. Just look at the size of the glass insulators on which they are suspended.
  
  Also the cables are uninsulated in fresh air so the wind helps to keep them cool
  
  In Large cities where 275KV cables have to be run underground they are very expensive often having hollow centres through which oil is circulated to cool the cables
  
  The simple answer is excessive cost compared to overhead system
• Question:-Is it possible to sell renewable energy to other sources other than the national grid?
  I am planning on setting up a wind farm in Africa and planning to export it to Europe in cannisters or cylinders. Will I be able to get a buyer even though I am not connected to any of the national grids?
  
  Answer:-You do realize that a wind farm doesnt harvest wind, it actually makes electricity. You cannot put electricity into cannisters or cylinders.
• Question:-Why is national grid sending a collection notice?
  Already get billed by LIPA every month and never got a bill from national grid before until last week for $50 something and now I've got one today for $60 something confused I'm going to call them tomorrow early morning also how is it that some tenants don't pay electric also
  Wrong section but help if you know
  
  Answer:-No idea - make the call and ask!

nflx

• Question:-How low do you think Netflix (NASDAQ:NFLX) stock will go ? $100 or less. Why the new Quickster name?
  
  
  Answer:-Zero within 5 years. Seriously.
  
  Increasing bandwidth has made "on demand" type services practical. Netflix is at a major disadvantage to larger players like Comcast.
  
  They had a clever marketing idea that became popular for a while, but the business model is outdated. I expect it to fail in much the same manner as Blockbuster video stores.
  
  EDIT: Stumbled onto a marketwatch article that discusses the Netflix issues in more depth.
• Question:-Do you think that Netflix stock (NFLX) will rise to 500+ per share at the rate its going?
  If only I bought it in 2002 for pennies on the dollar...
  a good example of a tech stock rising well through the 21st century is Google.
  Because I want to invest in it. Thanks.
  
  Answer:-It would take at least another year of sustained growth and investment to reach $500. If it splits 2 for 1 and goes to $250 (the current unsplit price) that is the same as going to $500. As the price increases, fewer people will buy it and more will sell it. Stocks tend to level out, hence the splitting. However, some stocks boom and bust, like Krispy Kreme Donuts. It went up to $80 about 10 years ago as it rolled out across the country, but now is at $5.50 a share. Before the recession it was at $12.50 (October 2007), so it dropped a lot as the donut fad faded.
• Question:-What do you think of this stock portfolio: NFLX, CMG, DECK, ESRX, and AKAM?
  
  
  Answer:-Its worth a pantload
• Question:-Does anyone think shares of Netflix (NFLX) are likely to rise over the next few months?
  It seems to be near the bottom of it's 52-week trading range and it was upgraded recently. Any thoughts?
  
  Answer:-I think it is quite likely.
  
  The technology "threat" - including the new Amazon download service announced last night - is overblown, certainly nearterm.
  
  Two national online DVD rental services (Netflix and Blockbuster) can co-exist.
  
  The stock has a reasonable valuation and a high short ratio, while the company continues to demonstrate excellent revenue and earnings growth.
  
  I don't have any money in the stock, but I think there is good chance for a short-term, ownable rally.
• Question:-What is the NFLX stock future?
  so keep in mind this isnt with real money. My economics class is playing Investopedia and my it has gone down 10.29% :/ should i sell now or wait for it to go up
  
  Answer:-Not everything that goes down comes back up. You have to look at why Netflix is down so much: price hikes and Qwikster, which although it was removed, wasn't a smart move by the company because it didn't make any sense and just made it harder for customers. Needless to say, it's unlikely that they'll repeal their price hikes, making this company a harder bet to invest in when it's becoming clear that it may be losing its corner on the market with competitors such as Red Box becoming more popular and Blockbuster attempting to make some kind of resurgence.
• Question:-Why is NFLX falling? Is it safe to hold on to it?
  
  
  Answer:-Supply has exceeded demand or more selling than buying. It has risen so much that investors may want to take their hard profits by selling. It also could be due to institutions rotating out of that sector. This is called sector rotation.
  
  Company insiders could also be exercising their stock options and selling for holiday money or for their next large purchase. Or you could check the recent NFLX news via Yahoo!Finance around the time of the stock price peak and when it started dropping.
• Question:-what are the stock prices for KO, HPQ, MSFT & NFLX for 4/9/11?
  i want to know asap its for a project and ive invested money in these =] get back to me thanks anyone
  
  Answer:-Coca-Cola Company
  http://finance.yahoo.com/q/hp?s=KO
  
  Hewlett-Packard Company (HPQ).
  http://finance.yahoo.com/q/hp?s=HPQ+Historical+Prices
  
  Microsoft Corporation (MSFT).
  http://finance.yahoo.com/q/hp?s=MSFT+Historical+Prices
  
  Netflix, Inc.
  http://finance.yahoo.com/q/hp?a=&b=&c=&d=3&e=13&f=2011&g=d&s=nflx
• Question:-should i buy Netflix (NFLX) after its 5 point tumble today?
  is it worth the risk?
  
  Answer:-It's risky with the volatility in the market, especially with the economy slowing down. As the economy slows down, people will be less concerned with renting films and more concerned with paying more important bills therefore slowing the growth of Netflix.
  
  I like Netflix but I'd be moving more into defensive stocks such as pharmaceuticals, consumer goods, high div stocks right now.
• Question:-Where can I find historical daily returns on specific stocks?
  I am doing a project involving portfolio analysis. The only problem is that I didn't track the daily performance of two specific stocks NFLX and VITC.
  
  I wanted to know if there was a website that had the daily historical returns of specific stocks not just the index.
  
  Answer:-Right here on Yahoo.
• Question:-AMZN buying NFLX FOR $245 ON MARCH 4,2011?
  is AMZN byuing NFLX
  
  Answer:-I've not seen anything about it. $245 sounds way off too. $245M seems low. Effective tomorrow, definitely not.