Suppose the I-V curve for a PV module exposed to 1-sun (1 kW/m²) of irradiance is as shown below: Current (ampa) 1-sun= 1000 w² 0 2 4 6 8 10 12 14 16 18 20 22 V (volts) a) What load resistance R would result in the maximum power delivered to the panel at 1-sun? b) How much power would that be? Suppose the hour-by-hour irradiance striking this module is given in the table below and the current (at any given voltage) is assumed to be directly proportional to the irradiance while the open circuit voltage is assumed to be the same at irradiances. c) Carefully draw the hour-by-hour I-V curves for the module. d) For the resistive load determined in (a), what would be the energy (watt-hr) delivered by this panel during the day? e) If the module is equipped with a maximum-power-point tracker, what energy would be delivered during the day? What percentage improvement does it provide?

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Q2.
Suppose the I-V curve for a PV module exposed to 1-sun (1 kW/m²) of irradiance
is as shown below:
Current (amps)
5
4
3
2
1
1-sun= 1000 wm²
8 10 12 14 16 18 20 22
V (volts)
a) What load resistance R would result in the maximum power delivered to the
panel at 1-sun?
b) How much power would that be?
Suppose the hour-by-hour irradiance striking this module is given in the table
below and the current (at any given voltage) is assumed to be directly proportional
to the irradiance while the open circuit voltage is assumed to be the same at all
irradiances.
c) Carefully draw the hour-by-hour I-V curves for the module.
d) For the resistive load determined in (a), what would be the energy (watt-hr)
delivered by this panel during the day?
e) If the module is equipped with a maximum-power-point tracker, what energy
would be delivered during the day? What percentage improvement does it
provide?
Time
Irradiance (W/m²)
8A.M. and 4P.M.
200
9A.M. and 3P.M.
400
10A.M. and 2P.M.
600
11A.M. and 1P.M.
800
12P.M.
1000
(e.g., from 7:30 A.M. to 8:30 A.M. the irradiance averages 200 W/m² which is
the same as from 3:30P.M. to 4:30P.M.).
Transcribed Image Text:Q2. Suppose the I-V curve for a PV module exposed to 1-sun (1 kW/m²) of irradiance is as shown below: Current (amps) 5 4 3 2 1 1-sun= 1000 wm² 8 10 12 14 16 18 20 22 V (volts) a) What load resistance R would result in the maximum power delivered to the panel at 1-sun? b) How much power would that be? Suppose the hour-by-hour irradiance striking this module is given in the table below and the current (at any given voltage) is assumed to be directly proportional to the irradiance while the open circuit voltage is assumed to be the same at all irradiances. c) Carefully draw the hour-by-hour I-V curves for the module. d) For the resistive load determined in (a), what would be the energy (watt-hr) delivered by this panel during the day? e) If the module is equipped with a maximum-power-point tracker, what energy would be delivered during the day? What percentage improvement does it provide? Time Irradiance (W/m²) 8A.M. and 4P.M. 200 9A.M. and 3P.M. 400 10A.M. and 2P.M. 600 11A.M. and 1P.M. 800 12P.M. 1000 (e.g., from 7:30 A.M. to 8:30 A.M. the irradiance averages 200 W/m² which is the same as from 3:30P.M. to 4:30P.M.).
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