What is solar power generation?
A
Generating power using wind
B
Generating electricity using solar energy
D
Creating power from tidal energy
Analysis & Theory
Solar power generation involves converting sunlight into electricity using photovoltaic cells or thermal systems.
What is the basic unit of a solar photovoltaic system?
Analysis & Theory
Solar cells are the fundamental units that convert sunlight into electricity.
What does a solar inverter do?
Analysis & Theory
A solar inverter converts the DC electricity generated by solar panels into AC for use in homes and industries.
Which device tracks the sun for higher solar panel efficiency?
Analysis & Theory
Heliostats track the sun to focus or align solar panels to maximize energy collection.
Which component stores energy in a solar PV system?
Analysis & Theory
Batteries store electrical energy generated from solar panels for later use.
What type of current is produced directly by solar PV modules?
Analysis & Theory
Solar photovoltaic panels generate direct current (DC) electricity.
Which method uses solar energy for space cooling?
C
Solar absorption refrigeration
Analysis & Theory
Solar absorption refrigeration systems use solar heat to drive cooling processes.
Solar space cooling helps reduce reliance on:
B
Fossil-fuel based air conditioning
Analysis & Theory
Using solar energy for cooling reduces dependency on electricity from fossil fuels.
Which of the following is a key component of an absorption refrigeration system?
Analysis & Theory
In absorption systems, the generator is where heat is applied to drive the refrigeration cycle.
What working fluids are commonly used in solar absorption systems?
B
Water-ammonia or lithium bromide-water
Analysis & Theory
Water-ammonia and lithium bromide-water are common fluid pairs used in absorption cooling systems.
What is the energy input for a solar absorption refrigeration system?
Analysis & Theory
Solar thermal energy is used to drive the generator in absorption refrigeration systems.
Which component of the absorption system acts as a heat exchanger?
Analysis & Theory
The evaporator absorbs heat from the space to be cooled, lowering the temperature.
What is the role of the absorber in a solar absorption system?
B
Absorbs refrigerant vapor
Analysis & Theory
The absorber absorbs refrigerant vapor from the evaporator, completing the cycle.
Which of the following is a benefit of solar absorption refrigeration?
C
No moving parts and low noise
Analysis & Theory
Absorption systems have fewer moving parts, resulting in quieter and efficient operation.
Which solar collector is commonly used for absorption refrigeration systems?
B
Parabolic trough collector
Analysis & Theory
Parabolic troughs can provide the high temperatures needed to drive absorption systems.
Which solar-powered cooling method uses desiccants?
Analysis & Theory
Desiccant cooling uses solar energy to regenerate drying materials for humidity control and cooling.
What is the COP (coefficient of performance) range of absorption systems?
Analysis & Theory
The COP of absorption systems is generally in the range of 0.5 to 0.8.
Which is the major limitation of solar absorption cooling?
A
Low COP and high initial cost
Analysis & Theory
The system has a low coefficient of performance and higher initial installation costs.
Solar absorption systems are best suited for which climate?
Analysis & Theory
Solar absorption systems perform best in hot and sunny climates where solar radiation is abundant.
Solar PV systems convert solar energy into:
Analysis & Theory
Photovoltaic systems directly convert sunlight into electricity.
What does a charge controller do in a PV system?
C
Regulates battery charging
D
Controls voltage for fans
Analysis & Theory
Charge controllers protect batteries by regulating voltage and preventing overcharging.
What kind of cooling can be supported using solar PV electricity?
B
Mechanical vapor compression
Analysis & Theory
PV electricity can run mechanical compressors in vapor compression cooling systems.
The absorber in a LiBr-H2O system contains:
Analysis & Theory
The absorber contains a dilute lithium bromide-water solution that absorbs refrigerant vapor.
Which component in a PV system allows grid interaction?
Analysis & Theory
A grid-tied inverter allows solar systems to send or draw power from the grid.
Which device increases overall cooling efficiency in solar air conditioning?
Analysis & Theory
A desiccant wheel removes moisture and improves the cooling efficiency of air conditioning.
Which of these is a zero-emission cooling system?
B
Vapor compression system
C
Solar absorption system
Analysis & Theory
Solar absorption systems can operate without fossil fuels and produce no direct emissions.
Which application is NOT ideal for solar-powered cooling?
Analysis & Theory
Petroleum refining requires very high temperatures not typically achievable with solar cooling.
What drives the refrigerant in an absorption refrigeration system?
C
Thermal energy from collectors
Analysis & Theory
Thermal energy, usually from solar collectors, drives the refrigeration process in absorption systems.
Which solar energy system provides both electricity and cooling?
B
Hybrid PVāThermal (PVT) system
Analysis & Theory
PVT systems generate electricity and capture heat for use in cooling applications.