HVAC Breaking News

Feb. 11, 2009: More Food Markets Using Secondary Loop Refrigeration

February 11, 2009
/ Print / Reprints /
ShareMore
/ Text Size+

MIDLAND, Mich. - The Dow Chemical Co. reported demand growth for its heat transfer fluids for secondary loop refrigeration applications of approximately 120 percent in 2008. And according to the company, demand for 2009 is also expected to be brisk as more supermarkets utilize secondary loop refrigeration to minimize energy consumption and environmental impact.

Secondary loop refrigeration began to grow in popularity about 10 years ago, but with energy prices soaring and the need to reduce the amount of greenhouse gases an increased priority, more stores are using efficient and environmentally friendly secondary loop systems for in-store refrigeration, said Dow. And those stores that have not adopted secondary loop refrigeration are seriously considering it, as revealed in a survey of the industry released by Dow Performance Fluids.

In traditional stores, each refrigerated food display case has its own refrigeration unit. By using secondary loop efficiencies, the number of individual refrigeration units is reduced to a single cooling unit. Secondary loop refrigeration systems using heat transfer fluids can help eliminate the need for numerous individual direct expansion refrigeration units, thus reducing the amount of ozone-depleting refrigerants used and potentially leaked into the environment, said Dow. Having fewer refrigeration units also reduces energy consumption. The energy saved depends on the size of the store and the number of refrigeration units replaced.

Secondary loop refrigeration systems can be used to cool meat, dairy, produce, and other medium temperature chilled food display cases. The system is designed to reduce the use of refrigerant and limit the potential for leaks into the environment. The secondary loop approach utilizes an abbreviated expansion loop (as compared to the more traditional direct expansion system) and a larger, low pressure secondary loop distribution system filled with propylene glycol based heat transfer fluid.

In addition to cutting refrigerant emissions, these types of systems are also said to improve display case cooling performance. The secondary loop system provides more evenly distributed and constant temperature refrigeration to chilled food display cases throughout the store at equivalent or lower operating energy expenses, said Dow. The primary refrigerant charge volume requirement is 65 to 85 percent lower, while the more compact direct expansion loop helps reduce the number of copper valves, fittings, and connections in the overall system. Many respondents to the Dow survey said the low pressure secondary loop, which typically utilizes ABS pipe, significantly reduces the potential for leaks, generating fewer emissions. Furthermore, said the company, studies show that on average secondary loop systems have up to 50 percent lower annual maintenance costs when compared to more traditional systems.

For more information, visit www.dow.com.

Publication date: 02/09/2009

Did you enjoy this article? Click here to subscribe to The NEWS Magazine

You must login or register in order to post a comment.

Multimedia

Videos

Image Galleries

2014 MCAA Annual Convention

Scenes from the 2014 MCAA Annual Convention in Scottsdale, Ariz.

Podcasts

NEWSmakers: Julian Scadden

Training is an ongoing process. Julian will discuss how you can generate maximum return on time and energy invested training by following a three part process. Listen to this podcast to get expert tips on training, tracking and follow up. 

More Podcasts

THE MAGAZINE

ACHRNEWS

NEWS 04-14-14 cover

2014 April 14

Check out the weekly edition of The NEWS today!

Table Of Contents Subscribe

SERVICE CALLS POLL

Which statement on service calls best applies to your business?
View Results Poll Archive

HVACR INDUSTRY STORE

plumbing-hvac.gif
2014 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

More Products

Clear Seas Research

 

Clear Seas ResearchWith access to over one million professionals and more than 60 industry-specific publications, Clear Seas Research offers relevant insights from those who know your industry best. Let us customize a market research solution that exceeds your marketing goals.

DON'T MISS A THING

Magazine image
 
Register today for complete access to ACHRNews.com. Get full access to the latest features, Extra Edition, and more.

STAY CONNECTED

facebook icontwitter iconyoutube iconLinkedIn i con