Which of the following refrigeration systems is most suitable for solar cooling?

Explanation:

Desiccant refrigeration system:

• Desiccant cooling systems are heat-driven cooling units and they can be used as an alternative to conventional vapor compression and absorption cooling systems.
• The operation of a desiccant cooling system is based on the use of a rotary dehumidifier (desiccant wheel) in which air is dehumidified.
• The resulting dry air is somewhat cooled in a sensible heat exchanger (rotary regenerator), and then further cooled by an evaporative cooler.
• The resulting cool air is directed into a room. The system may be operated in a closed cycle or more commonly in an open cycle in ventilation or recirculation modes.
• A heat supply is needed to regenerate the desiccant. Low-grade heat at a temperature of about 60–95°C is sufficient for regeneration, so renewable energies such as solar and geothermal heat as well as waste heat from conventional fossil-fuel systems may be used.
• The system is simple and the thermal coefficient of performance (COP) is usually satisfactory.