Your data center has a 75 KW load and is located in a building that would require long distances between the indoor and outdoor cooling units. There is no cooling tower available and reducing…

Question

Options

• AChilled water system
• BWater cooled system
• CGlycol cooled system
• DAir cooled split system

• A
  5% (2)
• B
  12% (5)
• C
  81% (34)
• D
  2% (1)

Explanation

A glycol cooled system is the best fit here because it uses a fluid loop (glycol/water mixture) between the indoor and outdoor units, which handles long pipe runs without the refrigerant pressure-drop and oil-return problems that limit split systems. Water cooled systems (B) are eliminated immediately because no cooling tower is available, and a cooling tower is required to reject heat in a water cooled design. Air cooled split systems (D) use refrigerant lines between the indoor and outdoor units, and long refrigerant runs create serious performance and reliability problems, making them unsuitable when distances are significant. Chilled water systems (A) are capable and scalable but carry much higher capital costs due to chillers, pumps, and complex piping infrastructure, making them a poor choice when cost reduction is the priority at a modest 75 KW load.

Memory tip: No tower plus long runs equals glycol. If you cannot use a tower (rules out water cooled) and the distance is too great for refrigerant lines (rules out split systems), glycol piping bridges the gap at a fraction of the cost of a full chilled water plant.

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