kmann wrote:Not bad, but 52KW hours is the energy in roughly 2 gallons of gasoline (if my back of the envelope calculations are correct).
CAPACITOR LOSSES
Power loss in a capacitor may be attributed to dielectric hysteresis and dielectric leakage. Dielectric hysteresis may be defined as an effect in a dielectric material similar to the hysteresis found in a magnetic material. It is the result of changes in orientation of electron orbits in the dielectric because of the rapid reversals of the polarity of the line voltage. The amount of power loss due to dielectric hysteresis depends upon the type of dielectric used. A vacuum dielectric has the smallest power loss.
Dielectric leakage occurs in a capacitor as the result of LEAKAGE CURRENT through the dielectric. Normally it is assumed that the dielectric will effectively prevent the flow of current through the capacitor. Although the resistance of the dielectric is extremely high, a minute amount of current does flow. Ordinarily this current is so small that for all practical purposes it is ignored. However, if the leakage through the dielectric is abnormally high, there will be a rapid loss of charge and an overheating of the capacitor.
The power loss of a capacitor is determined by loss in the dielectric. If the loss is negligible and the capacitor returns the total charge to the circuit, it is considered to be a perfect capacitor with a power loss of zero.
Kingcoal wrote:In other words, the cap sits there and starts slowly discharging once the charging source is disconnected. This wouldn't be too practical for the guy who drives to the airport and returns a week later...
NeoPeasant wrote:Ooh, startup company! Quick, what's the symbol? where do I buy?
As always, I will get excited about this product when I can go to Home Depot and buy one.
If I didn't have more pressing things to occupy my time, I think it would be interesting to track all these breathless announcements of savior technologies and show how many come to fruition over time and make investors rich. It would make an interesting niche website, and serve to remind people of how many of these miracles on the horizon have faded into obscurity.
mattb wrote:NeoPeasant wrote:Ooh, startup company! Quick, what's the symbol? where do I buy?
As always, I will get excited about this product when I can go to Home Depot and buy one.
If I didn't have more pressing things to occupy my time, I think it would be interesting to track all these breathless announcements of savior technologies and show how many come to fruition over time and make investors rich. It would make an interesting niche website, and serve to remind people of how many of these miracles on the horizon have faded into obscurity.
This is going to be a little differnt methinks.
Did you see who it is that provided the venture capital?
Kleiner Perkins Caufield & Byers, that's who! not the type of operation that invests in pie-in-the-sky technologies. If those guys are involved, then there's something to this.
SolarDave wrote:I wrote a little calculator for capacitors. Take a look at the claimed performance of this device:
Voltage?
3500
Capacity? 31
Capacity Unit: u = microfarads f = farads f
Joules: 189875000.0
watts for 5 seconds: 37975000.00000000000000000000
watts for 10 seconds: 18987500.00000000000000000000
watts for 30 seconds: 6329166.66666666666666666666
watts for 60 seconds: 3164583.33333333333333333333
watts for 10 minutes: 316458.33333333333333333333
watts for 60 minutes: 52743.05555555555555555555
watts for 24 hours: 2197.62731481481481481481
SolarDave wrote:Missing from the information - how fast the power can be moved in and out of the device. The 3500 volt potential also sounds - what's the word? - dangerous.
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