Critical Cooling
The Multistack Modular Chiller has proven to be ideally suited to the critical cooling markets. For the world's
most critical cooling applications, the inherent
redundancy of the Multistack design has made it the top choice.
N+1 REDUNDANCY
Designers will apply an "N+1" in most redundant chiller systems. That is, if “N” represents the system's total
chiller capacity requirement, the chiller plant will incorporate a single chiller with a capacity equal to “N” as well
as a second chiller with the same capacity, for a total system capacity of “N + 1.” This will insure that even in the
event of a single component failure, the chiller system will continue to satisfy the cooling requirements of the critical
load. However, when a chiller goes down it must be brought back into service immediately because any problem with the
other chiller would take the critical system down. In conventional critical cooling design, “N – 1 = 0.”
By contrast, when designing a critical chilled water system using Multistack Modular Chillers, the owner gets a system that
is inherently redundant. That is, a single component failure in a modular chiller will only affect a single refrigerant
circuit. This gives the owner two distinct benefits:
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In order to get “N + 1” redundancy, instead of adding an additional chiller, only an additional module is required.
This reduces the total tonnage required to achieve the desired redundancy, thereby reducing footprint and installation
cost significantly.
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In the event of a single system failure, the owner is not placed in an emergency repair situation. This is due to the
nature of the Multistack design. Where in a typical conventional design “N – 1 = 0,” with Multistack,
“N – 1 > 0!” Even in the event of multiple component failures, the Multistack Chiller will continue to provide
chilled water to the critical load.
Now, add to that 20 plus years of experience with some of the USA’s most critical cooling applications, a compressor failure
rate of less than 0.1%, and industry-leading factory support, and you get a combination that is hard to beat!
Multistack is the leader in critical cooling markets worldwide.
Here are just a few of the critical applications where Multistack has earned that position.
- Global Missile Defense System
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Systems critical to the successful operation of the US Global Missile Defense Proving Grounds, near Fairbanks,
Alaska, are cooled by multiple Multistack systems.
- US Department of State Embassy Cooling
- Over 140 US Embassy Critical Loads are cooled by Multistack!
- Depository Trust of NYC
- $1 trillion of transactions are processed through the systems cooled by Multistack
- Defense Information Systems Agency (DISA)
- Multistack cools the systems required for real-time defense data processing from the field
- FE/BR
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Several US “Forced Entry/Ballistic Resistant” buildings (as well as more than a dozen other critical
systems and centers) are cooled by Multistack in the Iraqi Theater
- ITXM—Central Blood Bank
- Multistack provides cooling to protect the human blood supply for Western Pennsylvania.
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In addition to the many systems critical to US Economic and Defense infrastructure that Multistack provides
critical cooling to, we provide process cooling to many top US Companies, such as:
- Ford: The Ford Crash Test Site
- General Electric: Injection Molding Processes (Consumer Appliances)
- QUEST: Critical Telecomunication System Cooling>
- Oral B: Injection Molding Cooling (Tooth Brushes)
