Recent content by PeterF

You did not define FIT or PPA (power purchase agreement?), but they sound like subsidies. I agree with everything you said, but subsidies deserve more explanation. I was not writing an academic article. Subsidies distort all markets some in the form of tax breaks, some direct subsidies and...

As energy efficiency increases and steady 24/7 industrial loads decline as a share of the total load, the peak to trough variation increases. This means that slow ramping technologies such as coal and nuclear, will more and find themselves in "must run" situations for 2-3 hours at a time, even...

Further to Bulancore's reply the bulk modulus of oil is about 1.5 GPa the bulk modulus of steel is about 160. In most cases the oil volume is by far the dominant term in your equation above so for practical purposes you can effectively ignore the rest of the components. If you need high accuracy...

There are a few other considerations when you say you have a wheel. Is the wheel running on the ground and the motor shaft carrying the gravity load. This axial load from gravity or the pressure angle of a gear train or the tension from a belt drive may exceed the allowable load for the motor...

Any batteries that are designed for long life, deep discharge. They have to be well ventilated and cannot be allowed to get too cold or particularly too hot. In the extremely unlikely event that you are drawing full power for an extended period on a hot day there is a small risk of fire, but...

Energy independence Assuming you are planning to run a normal household in a temperate climate with electric cooking and heatpump heating/cooling/hot water you would probably budget on 25-30kW.hr per day. If you make a high efficiency house, heavy insulation south (sun) facing double glazing...