Puzzle

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Across
  1. 3. cyrogenic refrigeration
  2. 7. use for gases
  3. 10. solar refrigeration
  4. 12. reverse heat engine
  5. 13. entropy increases
  6. 14. ecofriendly refrigerant
  7. 15. VA system
Down
  1. 1. use to exchange heat
  2. 2. tsaturation is greater than tactual
  3. 4. coefficient of performance
  4. 5. enthalpy is constant
  5. 6. based on heat
  6. 8. use to absorb refrigerant
  7. 9. reversible adiabatic
  8. 11. control the flow of refrigerant