Not a typical question you ask in a data center but maybe you should ask that question the next time you’re in the market for a chiller or computer room air conditioner (CRAC).
Because the compressor is like the engine of the cooling system. It’s kind of like going into a car dealership to buy a car, and not asking what kind of engine it has.
You may be hauling a heavy trailer, or driving lots of city miles, or not driving much at all. All of these situations call for different engines.
Like cars, cooling systems use different compressors for different situations. Paul Lin and I recently released a new white paper titled, The Different Types of Cooling Compressors that discusses these different compressor types.
The paper doesn’t get into the theory of refrigeration or the fine details of how each compressor works.
But it does provide an overview of each of the main types of compressors you typically see in a data center and a brief explanation of how the compressor works.
Then for every compressor type, we list their main benefits and limitations, along with the typical applications they best suited for.
If you don’t have time to read the paper, I’ll leave you with some high-level facts about compressor types:
I’m in the middle of writing a paper that focuses on the fourth bullet. This issue, in particular, causes much confusion in the marketplace.
Simply put, variable loading does not equal variable speed.
Article by Victor Avelar, Schneider Electric Data Center Blog