Refrigeration & Air Conditioining

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Across
  1. 2. Jet Refrigeration# Uses high velocity steam to create vacuum and produce cooling
  2. 4. of Refrigeration# Process of removing heat from a substance or space to lower its temperature
  3. 6. Nitrogen Refrigeration# Refrigeration achieved by evaporating liquid nitrogen at very low temperature
  4. 9. Refrigeration# Method of refrigeration using melting of ice to absorb heat
  5. 10. Diagram# Pressure-Volume diagram representing stages in air refrigeration cycle
  6. 12. of Refrigeration# Amount of heat required to melt one ton of ice in 24 hours (3.517 kW)
  7. 14. Refrigeration# Refrigeration produced by sudden expansion of compressed gas without external work
  8. 15. Formula# Refrigerating effect divided by work input
  9. 16. Coleman Cycle# Another name for air refrigeration cycle used in aircrafts
  10. 17. of Air Refrigeration# Simple, light, and suitable for aircraft use
  11. 18. Refrigeration Cycle# Ideal and most efficient refrigeration cycle operating between two temperature limits
Down
  1. 1. Effect# Amount of heat removed per unit time by a refrigerator
  2. 3. of Performance# Ratio of refrigerating effect to work input
  3. 5. of Air Refrigeration# Low coefficient of performance and large size
  4. 7. of Refrigeration# Expressed in tonnes of refrigeration (TR)
  5. 8. Ice Refrigeration# Method using solid carbon dioxide as the cooling substance
  6. 11. Refrigeration# System using air as working substance in a closed cycle
  7. 12. Process# Expansion process with no heat transfer and no work done
  8. 13. Problem Example# A refrigerator removes 210 kJ/min with 40 kJ/min input. Find COP = 5.25
  9. 19. Diagram# Temperature-Entropy diagram used to represent heat exchange in a cycle