Cooling loop sizing

Sizing the cooling loops can be straight forward based on the planned cooling requirements of each populated/planned MCS-200/100 server enclosure. The amount of heat, in watts, that needs to be removed from each component in the server rack must be added together to obtain the total heat to be removed by the MCS-200/100 cabinet. You can copy the following table for documenting individual cabinet calculations. Calculations must include the equipment installed today and additional equipment planned for installation over the design life of the system.

Rack Cooling Loop Sizing Chart

Installed

Quantity

Max. Watts

Max. CFM

Max. Watts

Max. CFM Total

Component

 

Generated

Required

Total

 

 

 

 

 

 

 

Component 1:

 

 

 

 

 

 

 

 

 

 

 

Component 2:

 

 

 

 

 

 

 

 

 

 

 

Component 3:

 

 

 

 

 

 

 

 

 

 

 

Component 4:

 

 

 

 

 

 

 

 

 

 

 

Component 5:

 

 

 

 

 

 

 

 

 

 

 

Component 6:

 

 

 

 

 

 

 

 

 

 

 

Component 7:

 

 

 

 

 

 

 

 

 

 

 

Component 8:

 

 

 

 

 

 

 

 

 

 

 

Component 9:

 

 

 

 

 

 

 

 

 

 

 

Component 10:

 

 

 

 

 

 

 

 

 

 

 

Total for Cabinet*

 

 

 

 

 

 

 

 

 

 

 

*An approximate value can be estimated by assuming all power entering the cabinet is converted to heat.

After calculating the total expected required heat load, use the charts in “Determining heat load capacities (on page 72)” to determine required water flow and pressure based on potential chilled water temperatures. The PSID must be measured prior to the cold water inlet/after warm water outlet. All water system equipment, materials, and installation must comply with any applicable construction codes and LAHJ.

Determining heat load capacities

The total airflow required by the equipment installed in each server rack must be compared with the total available supply from the MCS-200/100, so it is not exceeded. The fans in the MCS-200/100 are speed-controlled to reduce the airflow in case the maximum cooling capacity is not demanded from the MCS-200/100.

MCS per rack capacity chart

Number of fans

HP Modular

HP Modular

MCS-200/100

MCS-200/100 with

 

Cooling System

Cooling System

 

Expansion Rack

 

200/100

200/100 with

 

 

 

 

Expansion Rack

 

 

 

 

 

 

 

1 fan (BW978A)

10kW, 934 CFM

5kW, 467 CFM

N/A

N/A

2 fans

20kW, 1,866 CFM

10kW, 933 CFM

N/A

N/A

3 fans

30kW, 2,800 CFM

15kW, 1,400 CFM

N/A

N/A

Facility planning for implementation 72