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The penalty of a water-cooled system against an air-cooled one is

  • A.a higher condensing temperature in service
  • B.an inability to operate at part load
  • C.a shorter life for the compressor
  • D.the cooling tower's water consumption and treatment

Answer: D

Make-up water, blowdown, chemical treatment and the risk of legionella all attach to the tower, along with the tower fan and the condenser pump. Where water is scarce or dear the air-cooled machine wins despite its poorer efficiency.

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