HP Modular Cooling System Site Preparation Guide

Coolant Source Planning
A number of factors relating to a chilled water distribution system must be considered during the
site preparation process, including the following:
• Type of water source: shared water or dedicated chilled water loop
• Maximum and minimum temperatures of building chilled water plant, and target chilled water
temperature of dedicated loop based on total cooling capacity required and planned
• Viscosity of the chilled liquid, combined with the length and elevation changes in piping
determined by selected route, can effect the selection of pipe size
CAUTION:
The minerals and chemicals typically found in tap water can react with
metallic elements used in the HP MCS closed-loop distribution system.
Electro-chemical reaction can cause scaling, corrosion, leaks, and
blockage, ultimately resulting in reduced efficiency of the cooling system
and even damage.
NOTE:
The use of building chilled water for the HP Modular Cooling System
unit is possible under certain conditions. However, consult with an HP
representative and facilities expert to determine whether this approach is
possible within your specific data center. Refer to the requirements for
water quality, temperature and flow rate described in this section.
HP recommends that the water source for the HP MCS be a dedicated chiller unit or water-to-water
heat exchanger that allows for line isolation, better control of individual systems, and regulated
water quality. The chilled water source for this loop would be provided by one or more chiller
systems. Advantages in using a dedicated loop include:
• Easier scheduling of maintenance to either a building system or dedicated HP Modular Cooling
System loop
• Easier to maintain water quality parameters in the dedicated closed loop
• Better temperature and flow regulation to guarantee the needs of the HP Modular Cooling System
• More flexibility to regulate water temperature in order to reduce the potential for condensation
Figure 10 depicts the HP Modular Cooling System being supplied directly by a dedicated chiller
unit or water-to-water heat exchanger in a closed loop configuration.
HP MCS Site Preparation Guide
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