No commentary, just numbers.
In advance, here's my results:
|capacity||capacity factor||average output||% of total|
|Natural gas/"bio"diesel||7.6 MW||77%||5.84 MW||98.5%|
|Solar panels||0.5 MW||14.5%||0.073 MW||1.2%|
|Vertical wind turbines||0.36 MW||5%||0.018 MW||0.3%|
In the parking lot - not where the fans park - the Eagles will build a cogeneration power plant that can run on biodiesel or natural gas.
The capacity of the plant will be 7.6 megawatts; the solar and wind together will add only .86 of a megawatt.
In short, natural gas.
The Eagles have contracted with Orlando FL-based SolarBlue, a renewable energy and energy conservation company, to install approximately 80 20-foot spiral-shaped wind turbines on the top rim of the stadium...
No source explicitly names these turbines, but I fairly sure they are these ones (S594 -- the 19.8-foot model):
Under this assumption, 80*4.5 kW = 360 kW of wind turbines, so the remainder (860 kW - 360 kW = 500 kW) is the solar panels.
How much wind power? The most optimistic number is the manufacturer's advertised figure: 3,362 kWh/year per turbine. Out of 4.5 kW nameplate capacity, this is a pitiable 8.5% capacity factor -- but that's the optimistic figure. In the footnote it mentions the assumed conditions: 7 m/s annual average wind speed (15.7 mph). Wildly optimistic.
The Philadelphia Inquirer article reported the average sustained winds as 8 - 10.9 mph, or 3.6 - 4.9 m/s (I think these numbers are at weather station elevation, 10 meters (33 feet)):
National Weather Service statistics show that monthly average wind speeds at nearby Philadelphia International Airport ranged from 8 miles an hour in August to 10.9 miles an hour in March.
Likewise, NREL statistics put Philadelphia in the worst wind category, 0 - 5.6 m/s (0 - 12.5 mph) annual average at 50 meters (164 feet) above ground level.
Compare with the manufacturers' power curves:
Even at the upper limit of Philly 50-meter winds (5.6 m/s average), the range of expected output is from only 2,000 kWh/year down to roughly zero. The highest figure corresponds to 5% capacity factor, though, seeing the ranges involved, this is still wildly optimistic.
2,000 kWh/year per turbine * 80 turbines = 160,000 kWh/year = 18 kW average. Hilariously, this costs $1.28 million at retail price.
On to solar. NREL maps say this place gets roughly 4.5 kWh/year/m^2 for optimally-oriented flat plate (i.e. not sun-following) solar panels. (This is under "PV Solar Radiation (Flat Plate, Facing South, Latitude Tilt)—Static Maps" > "Annual")
Note that solar nameplate capacities are measured at 1 kW/m^2 irradiance (standard test conditions), so that assuming linear power/irradiance (very reasonable) 4.5 kWh/day/m^2 represents a capacity factor of 18.8%. Or close; this is the module's best-case DC output -- as NREL details, AC output would be around 0.77 of this (the "performance ratio"). So the capacity factor is around 14.5%.
(As a sanity check, the E.C. has a more sophisticated European map which does exactly the same calculation -- they assume a performance ratio of 0.75)
So in all: 14% * 500 kW = 614 kWh/year = 70 kW average output.
The surprisingly high capacity factor of the gas generator (why?) comes from this figure:
The Eagles and SolarBlue estimate that over the 20-year horizon, the on-site energy sources at Lincoln Financial Field will provide 1.039 billion kilowatt hours of electricity
Subtracting off the solar+wind generation, this leaves 1.024 billion kWh (basically all of it) to the 7.6 MW gas generator -- 77% capacity factor.