Tag Archives: load

how do I recharge my battery bank?

Posted on May 18, 2012 by admin| 2 Comments

So I have installed (2) 5250 CCA battery banks on my 22ft boat. One of the banks is strictly for the electric motor (docking and emergency use only). The other bank is for all other electrical appliances and acceressies (12v parallel circuit). I want to use wind, solar and water powered generators to recharge and maintain my battery banks. I have a continuous load of .5 kw with a max load of 1 kw/hr on the acceressies bank and a 1000 kw with a max of 4000 kw/hr load on the e-motor bank (12v). If I divide the power retrieval amongst the 3 charging systems (wind, solar and water) what are the sizes of the charging units needed to recharge and maintain both batter banks? What other components would be need to full fill this system?

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Posted in Water Power

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Will the heat transfer from an inverter (full wave bridge rectifier) under load power a Stirling engine?

Posted on February 3, 2012 by admin| 1 Comment

The premise is that a 2.5kw wind generator is linked via the inverter to heat transfer casing of a 2hp stirling engine with the gas medium being alcohol. Is this feasible given the amounts of heat produced and required? Thank you so very much for any insights or help you can offer.

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Posted in Water Power

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Will running a homemade wind turbine without a load hurt it?

Posted on January 11, 2012 by admin| 1 Comment

I’m in the process of building my first wind turbine and was curious if running it without a load (ie. battery bank) would be harmful to the generators? I’m using a 260VDC 5A permanent magnet treadmill motor as the generator. I’m about ready to put up my tower and wasn’t sure if I can go ahead and get it all assembled and put up and then add the battery bank as soon as I can get the batteries. This way I could also see how well it’s going to perform on the tower. It’s a 60′ lattice tower and will be hinged at the bottom but still will be a bit of a pain to lower and raise a lot. I’m really excited about getting this up and running but don’t want to damage anything before I even get started.

Also I’ve heard of people using old electric baseboard heaters as a load dump when the bank gets fully charged. I’m having some trouble locating any of these around here and was wondering if anyone would have any other suggestions on something I could use as a dump? Thanks for all your time.

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Posted in Water Power

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Someone can help me about Power factor of Single Phase motors?

Posted on January 1, 2012 by admin| 2 Comments

What is the power factor of single phase capacitor start motor while running under load or without load. Some motors have capacitor permanantly connected in series winding. What power factor of these motors?

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Posted in Water Power

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Water Captret increase power over time when given a load

Posted on January 2, 2011 by admin| 4 Comments

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Posted in Water Power

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Phyics confusing problems smart people only!!?

Posted on May 26, 2010 by admin| 4 Comments

20.)using a ramp with a mechanical advantage if you needed to move a 200 n load a distance of .5 meters what would be the input distance (pushed up the ramp)
A.) .25m B.) .5m C.)1 m D.) 2 m E.) 4

21.) an object is stationary with mass 10 kg and is 8 meters above ground assuiming there is no air resistance of friction what is the objects kinetic energy.
a.) 7840 j B.) 800 j C.) 784 j D.) 892 j D.) 0 j

22.) a plane is travelling 30 m/s along the positive y-axis. awind at 30 degrees to the x-axis going 20 m.s pushes the plane along a new path. what is the planes velocity in the x direction.
A.) 20.2 m/s B. 17.3 C.) 10 ms D.) 25.9

24.) an object is in free fall (v initial= 0) how fast is it going after five seconds?
a.) 12.5 ms b.) 24.5 ms C.) 49 ms D.) 122.5

15.) an object with mass 15 kg has a kinetic energy of 1739 joules. what is the object’s velocity?
A.) 177.4 ms
B.) 4.8 ms
c.) 11.8 ms
d.) 2.7 ms

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Posted in Solar Power

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max power transfer?

Posted on May 23, 2010 by admin| 2 Comments

The concept applied here is fundamentally the same problem whether I am worried about hooking up a speaker to my power amplifier or connecting up a solar cell to an electrical load.

For this problem assume that Vs = 12 V and Rint = 8 ohms. Assuming we are at the conditions for max power transfer, determine

The value of RL.
The power absorbed by RL.
The efficiency of the circuit, that is, the ratio of power absorbed by the load to power supplied by the source.

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Posted in Wind Power

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