lesson 1

Question 1

solar energy is _______ and ________ resource, it’s a _________ energy source that people can exploit anywhere

Answer 1

clean and cheap, renewable

Question 2

Solar energy is the energy obtained by

Answer 2

capturing heat and light from the Sun.

Question 3

It is considered a green technology because

Answer 3

it does not emit greenhouse gases.

Question 4

Solar energy is abundantly available and has been utilized since long both as

Answer 4

electricity and as a source of heat.

Question 5

enumerate what are the essential subsystem in a solar energy plant

Answer 5

1. solar collector or concentrator
2. energy transport medium
3. energy storage
4. energy conversion plant
5. power conditioning, control and protection system
   6.alternate or standby power supply

Question 6

Active solar techniques include the use of

Answer 6

1. photovoltaic systems
2. concentrated solar power
3. solar water heating

Question 7

Passive solar techniques include

Answer 7

1. orienting a building to the Sun
2. selecting materials with favorable thermal mass or light-dispersing properties
3. designing spaces that naturally circulate air

Question 8

solar collector or concentrator receives
solar rays and collect the energy. it may be of

Answer 8

1. flat plate type without focusing
2. parabolic through type with line focusing
3. paraboloid dish with central focusing
4. Fresnel lens with centre focusing
5. heliostats with centre receiver focusing

Question 9

there are 3 types of energy storage when there is no sun (night or cloudy)

Answer 9

1. thermal energy storage
2. battery storage
3. pumped storage hydro-electric plant