A Modular Data Center is the generic term used for a data center that has one or more prefabricated components. Prefabricated components come in three categories: Data center space Mechanical infrastructure Electrical infrastructure A Containerized Data Center is a type of prefabricated data center. It looks exactly like a shipping container and is built toRead more about Modular vs Containerized Data Centers. Is there a difference?[…]
The fan law, or affinity law, states that the power used by an electric motor to rotate a pump or fan is proportional to the cube of its rotational speed. This 3 minute video explains the fan law and its effect on data center power use. Data Center Example Lets say we have a 15Read more about Fan Law[…]
Consider the following example describing data center airflow using a raised floor layout. Figure 1 shows a simplified side view layout for a data center with a Computer Room Air Conditioner (CRAC) unit on the left and two rows of IT equipment on the right. The CRAC unit and IT equipment sit on a raisedRead more about What Causes Data Center Hot Spots?[…]
A story about temperature vs. pressure in cooling management
Once upon a time long long ago, in a valley just south of the San Francisco Bay, a large truck pulled up to a farmer’s house and dropped off a thousand boxes, each of which was the same size and weight. The farmer was puzzled to find that in every box was a toaster each with the same set of instructions. The instructions indicated that the farmer must construct a way to ensure that, when these thousand toasters were turned on, they would not overheat and burn up.
Said the instructions, if even one toaster burns up, the farmer will have failed and be damned for eternity. If, however, the farmer succeeds at this challenge, he will be rewarded and praised in all the land. This was quite an odd request, but the farmer took it seriously and consulted with his smartest group of friends. The group was comprised of the three people: a toaster expert who knew the heat output of every type of toaster ever invented, a building engineer who had designed cooling systems for office buildings, and a PhD who just happened to be the farmer’s neighbor. The team deliberated for a few weeks and came up with a brilliant design.
The 2011 thermal guidelines is the third installment ASHRAE has published on this topic. The first was in 2004 and the second in 2008. Here are the major changes in the 2011 version: Expansion of the environmental classes to accommodate different owner requirements, facility applications, and IT priorities Introduction of the allowable thermal envelope whichRead more about How cool should my data center be?[…]