29 November 2016

How Much Do Dirty Coils Cost You?

The short answer is plenty! Dirty coils, or anything that blocks the free flow of air into or out of the evaporator and condensing units for your walk-in cooler’s refrigeration system can cost you in several big ways:

  • It will cost you more in electrical energy to run all of the system’s components longer and harder, […]
8 November 2016

Does a Freeaire® System Work for a Server Room?

An outside air economizer like a Freeaire® system with a Polar Power® package can be a huge benefit for a server room. In fact, it is one of the most cost effective ways to utilize the cooling potential of outside air. Because a server room can safely be kept very warm, even warmer than a typical […]

29 September 2016

Facebook Loves Polar Power Also…

It turns out that Facebook is also a big believer in the cooling power of “Polar Power”.

Check out the following article from Fast Company talking about their use of outside air in one of their server farms.  The benefits of using outside air in the server room context are clear. There is a relatively […]

22 September 2016

Glass Door Merchandisers and Novelty Coolers

In addition to a walk-in cooler and freezer, a convenience store in particular, often has a variety of small reach-in glass door merchandisers, sometimes called novelty coolers, . They are often installed for free by the manufacturer or distributor of the products they contain and who retains ownership of them. However, the storeowner must pay […]

20 September 2016

Efficient Refrigerated Walk-in Box Construction

Refrigeration efficiency improves by eliminating multiple small systems, like reach-in refrigerators and chest type freezers, and replacing them with coolers and freezers large enough for people to enter. This increases the ratio of volume to exterior surface area of the cooled storage spaces, which reduces the heat loss per cubic foot of space. It also […]

13 September 2016

The Compressor Bonus

The process of saving energy in the refrigeration of a walk-in cooler or freezer often involves the pleasant prospect of saving even more energy that one might expect. Any electrical energy consumed inside a refrigerated space by things like room lights, reach-in door lights and evaporator fans is completely converted to heat that must be […]

20 July 2016

How to Control Electric Defrost

In an earlier blog, I spoke about why coolers and freezers need a defrost cycle so that the systems work properly.  So how does the refrigeration system know when to go into defrost and, just as importantly, when to come out?

time clockThe least sophisticated way to control […]

18 July 2016

The High Cost of the Coldest Beer in Town

We Americans have a thing for “the coldest beer in town”. Just go to England for a long draught of a pub’s typical fare to see what I mean. I can still manage to get that seemingly only-cooled-in-the-shade British ale down when I’m there, but it’s not what I’m used to back here in the […]

14 July 2016

ECMs and Beyond

evap unitMore than half of the energy consumed by buildings in the U.S. is used by electric motors. Refrigeration systems are dependent on motors to operate fans in both condensing and evaporator units. The evaporator fans found inside a walk-in cooler or freezer are especially good candidates […]