Question

questions 15 and 16 refer to the following.
the graphs below show the energy output of one kilowatt of photovoltaic (pv) capacity of different pv panel systems over a day (graph on the left) and the annual energy production (graph on the right) of the same systems. dual - axis tracking means that the pv panels are constantly moving to always face the sun directly. if the pv panels are tilted in a fixed position, the direction of tilt is indicated. flat pv panels are not tilted in any direction.
which of the following pv panel systems is least effective at producing energy?
a tracking, dual - axis
b no tracking, tilted south
c no tracking, tilted west
d no tracking, tilted east

Explanation:

Step1: Analyze the annual energy production graph

We look at the bar - chart on the right which shows the annual energy production (in kilowatt - hours) for different PV panel systems. The lower the value on the y - axis (kilowatt - hours), the less energy the system produces.

Step2: Compare the values

From the bar - chart:

• Tracking, dual - axis has an annual energy production of \(1,875\) kilowatt - hours.
• No tracking, tilted south has an annual energy production of \(1,668\) kilowatt - hours.
• No tracking, tilted west has an annual energy production of \(1,633\) kilowatt - hours.
• No tracking, tilted east has an annual energy production of \(1,602\) kilowatt - hours.

Answer:

D. No tracking, tilted east