Fluid coolers and pump packages are components of which heat rejection system?

Question

Options

• AChilled water system
• BWater cooled system
• CGlycol cooled system
• DAir cooled self-contained system

• A
  8% (4)
• B
  2% (1)
• C
  77% (40)
• D
  13% (7)

Explanation

Glycol cooled systems reject heat by circulating a glycol-and-water mixture from the equipment through an outdoor fluid cooler, where ambient air dissipates the heat, and a pump package is required to move that fluid through the loop - making both components defining features of this system type. Chilled water systems (A) reject heat through cooling towers or water-cooled condensers, not fluid coolers with glycol circuits. Water cooled systems (B) rely on cooling towers and condenser water to reject heat from a refrigeration machine, a fundamentally different loop arrangement. Air cooled self-contained systems (D) use direct refrigerant-to-air condensers built into the unit itself and have no separate fluid loop or pump package at all.

Memory tip: Associate "glycol cooled" with the word "fluid" - glycol is the special fluid in the loop, the fluid cooler rejects its heat, and the pump package keeps that fluid moving. If you see "fluid cooler + pump package" on the exam, think glycol.

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