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EGT408S18EXAMTHREE180320.docEGT408 S18 EXAM THREE Ch 9 10 11 12 180320 LOG IN IDENTITY _______________________
If one selection is needed, underline the ONE best choice.
If a word or phrase is needed, use EXACT terms as in text.
Q1 In section 9-2-2, what are the two factors making up "global insolation" in the atmosphere? ____________ _______________
Q2 In the table showing average daily insolation for world cities, select the maximum = ______ and
minimum =________ watts per sq. meter
Q3 In section 10 - 4, what are the first "parts" of a PV system that the customer should buy?____________________ _____________________________________________
Q4. In section 10-2 Which country, in 2010 had the greatest cumulative installed PV panels in 2010?_________________
Q5 In section 10-2, the cost per watt for PV panels is listed by the industry at ___________________ operating conditions.
Q6. In 10-2-1, the two manufacturing methods for PV panels are _________________________ and __________________
Q7. Thin film PV cells cost (more) (less) than other methods.
Q8 Thin film PV cells are(more) (less) efficient than other methods.
Q9 In 10-3 an incoming photon breaks loose an _____________.
Q10 Which PV cell losses are listed in Ch 10-3? [Underline all:]
(collection) (reflection) (incident) (transmission) (neutron)
Q11 In 10-3-1, A PV device which achieves on the order of ______% to ______% efficiency is considered relatively efficient.
Q12. Increasing PV efficiency using a light system is classified in section 10-2-1 as ______________________________________.
Q13 In 10-2 The more efficient, and more difficult to manufacture PV cells are the ones using the process _______________________
Q14 In 10-3-1, PV cells have a finite width. This causes losses due to the principle of _________________________________________
Q15 A PV has Im=0.027, Vm=0.44, IL=0.022, Voc=0.52
Find fill factor FF using
ImVm
FF
ILVoc
´
==
´
____________Q16 A 350 watt PV system has 64 cells, each costing $1.80.
All other parts cost $215. Labor cost to assemble and test is $180. Find the PV system total cost. Then use this to find the $ / watt for the 350 watt PV system = __________
Q17 If C = 6 kW , RF = 1850 h,
h
= 0.68, use the formulaECRF
=´´h
to find E in kWh ______________________Q18 In 11-4 Which of these are listed as parts of a solar collector?
[Underline more than one]
a. absorber sheet. b.glazing sheets c. thin-film
d. tubes or ducts e. insulation f. cover shade
Q19. In Chapter 11 - The insolation value at which heat gain balances heat loss is called ________________ insolation.
Q21. A selective surface absorber almost completely absorbs solar radiation peaking near __________
m
m
but be nearly invisible to thermal radiation peaking near ___________m
m
Q23. In 12-4 Increasing humidity ______ per cent can compensate comfort level for a 1 deg F decrease in air temperature.
Q24. In 12-7, Sunlight shining through a window is an example of (direct) (indirect) (isolated) gain.
Q25. Sunspace on the side of building is an example of
(direct) (indirect) (isolated) gain
Q27. In section 12-7-3, A thermal mass (or Trombe) wall inside solar glazing is an example of (direct) (indirect) (isolated) gain.
Q28 . A Trombe wall has thermal mass to provide thermal _______________ so as to not overheat and waste energy.
Q29. A Trombe wall is typically 12 to 16 inches thick for the best timing of the ________________ wave.
Q30. Direct gain thermal storage absorbs solar radiation
(inside) (outside) (next to) the living space.
Q31. A Trombe wall should peak the inside temperature surface approximately _______ hours after the peak outside temperature.
Q32. Window overhangs that compromise between the need for passive heating and passive cooling can be helped by a moveable _______________________________________.
I have not given or received help from a person on this test.
________________________________________________
