Wind & Solar Energy ESET 222 Quiz
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Questions and Answers

What is the hour angle in the morning before the sun crosses the local meridian?

Positive values

How is the hour angle expressed?

In degrees

At what time would the hour angle be +15 degrees solar time?

11:00 A.M.

What does a negative hour angle indicate in the afternoon?

<p>The sun is in the west</p> Signup and view all the answers

How is the location of the sun at any time of day described?

<p>Altitude angle and azimuth angle</p> Signup and view all the answers

When is the azimuth angle positive?

<p>In the morning</p> Signup and view all the answers

When is the azimuth angle negative?

<p>In the afternoon</p> Signup and view all the answers

What factors do the azimuth and altitude angles of the sun depend on?

<p>Latitude, day number, and time of day</p> Signup and view all the answers

How can you compute the altitude angle of the sun?

<p>sin β = cosL cosδ cosH + sinL sin δ</p> Signup and view all the answers

What is the latitude of Montreal, Quebec?

<p>45 degrees</p> Signup and view all the answers

What is the solar declination on the summer solstice?

<p>23.45 degrees</p> Signup and view all the answers

How can you compute the azimuth angle of the sun?

<p>φS = sin^{-1}(-0.9644)</p> Signup and view all the answers

What is the altitude angle of the sun at 3:00 P.M. solar time in Montreal, Quebec on the summer solstice?

<p>47.73 degrees</p> Signup and view all the answers

What direction is the azimuth angle pointing at 3:00 P.M. solar time in Montreal, Quebec on the summer solstice?

<p>75 degrees west of south</p> Signup and view all the answers

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