Calculating Server Room Heat Loads

Priceless corporate data and tens of thousands of dollars of server room equipment can quickly be at risk for loss if server room temperatures aren’t maintained correctly. Because server room equipment releases so much more heat than any other office location, portable air conditioners are the ideal solution for cooling the server room by being location specific with your critical cooling requirements.

Server room cooling needs
Before purchasing air conditioners for a server room, you’ll need to calculate how much heat must be displaced. With the excessive amount of heat produced by the server room equipment, you can’t choose a portable air conditioner based on the general square foot recommendations alone. Instead, you’ll need to pay attention to the entire BTUs generated in the server room.
In principle it’s easy to calculate the size of air conditioning unit you’ll need for your server room just add together all the sources of heat and install an air conditioning unit that can remove that much cooling. In practice however, it’s rather more complicated.

Calculating The Heat Load
The amount of heat generated is known as heat gain or heat load. Heat is measured in either British Thermal Units (BTU) or Kilowatts (KW).
1 KW is equivalent to 3412 BTUs. 12000 BTU = 1 Ton of Cooling Capacity

Factors Include:

• The floor area of the room
• The size and position of windows, and whether they have blinds or shades
• The number of room occupants (if any)
• The heat generated by equipment
• The heat generated by lighting

To calculate the heat load you will need the following information.Room Area BTU = Length (m) x Width (m) x 337

• • South Window BTU = South Facing window Length (m) x Width (m) x 870
  • North Window BTU = North Facing windows Length (m) x Width (m) x 165
  • If there are no blinds on the windows multiply the result(s) by 1.5.
  • Windows BTU = South Window(s) BTU + North Window(s) BTU
  • Total Occupant BTU = Number of occupants x 400
  • Equipment BTU = Total wattage for all equipment x 3.5
  • Lighting BTU = Total wattage for all lighting x 4.25

Total Cooling Required
Add all the BTUs together
Room Area BTU + Windows BTU + Total Occupant BTU + Equipment BTU + Lighting BTU = Total Heat Load
Total Heat Load divided by 12000 = Total Cooling Tonnage
For example if the calculated BTU = 16400 BTU then 16400/12000 = 1.36 Total Cooling tonnage required. Since the requirement is 1.36 Tons you would consider using our SCT18, 1.5 Ton unit to cool your server room.

Resources: http://www.portableairconditionersinc.com

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