In this post you’ll see how variable-frequency drives (or VFDs) can generate a payback of 1.5 to 5 years in supermarkets. You’ll also see which uses of VFDs offer the fastest payback and highest return on investment (or ROI).

At Singh360, we’ve found that HVAC blower fans of more than 7.5 horsepower typically provide the best ROI. The next-highest return comes from using VFDs in refrigeration condenser fans with motors totaling more than 7.5 horsepower.

Use of VFDs in refrigeration compressors delivers the smallest reduction of energy consumption. But such applications can reduce compressor cycling and extend the life of compressors. And that’s worth real money too.

By applying seven easy rules of thumb, you can quickly estimate potential energy savings for refrigeration systems in a supermarket—even if you’re not an engineer.

With these rules you can make quick estimates in your head or on the back of an envelope. Your estimates are likely to be pretty accurate, even without a detailed audit. This information can help you spot big opportunities for potential savings. You’ll feel smart, and you may impress your colleagues.

With these rules you can make quick estimates in your head or on the back of an envelope. Your estimates are likely to be pretty accurate, even without a detailed audit. This information can help you spot big opportunities for potential savings. You’ll feel smart, and you may impress your colleagues.

But be careful. These rules of thumb use averages for North American supermarkets. Even within North America, the numbers will vary for stores that have an unusual design or sell an unusual assortment of refrigerated foods.

When it comes to reducing energy in supermarkets, we either focus on refrigeration (because it consumes 40-50% of the total energy) or lighting (which is pretty easy to understand). 

However, HVAC equipments (almost 20% of the store power) are often overlooked though they can significantly impact energy consumption, provide customer comfort for better shopping experience and reduce food product quality and shrinkage.

So what are the ways HVAC energy consumption can be reduced in a retail environment? Here’s a roundup of the important ideas to consider in your store.

These innovations help organizations set priorities for efficiency projects based on sustainability goals, speed of payback, and the measured return on investment. Contact Singh360 to see if these innovations fit with your facility and energy management strategy going forward.