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Posts from the ‘Earth Day’ Category

Earth Day and Refrigerants: A Look Back — and Forward

Jennifer_Butsch Jennifer Butsch | Regulatory Affairs Manager

Emerson Commercial & Residential Solutions

It’s Earth Day, which means we should all take a minute to reflect on how we can do our part to make the planet a greener place. In the world of commercial refrigeration, environmental initiatives and sustainability best practices typically focus on limiting the harmful effects of hydrochlorofluorocarbon (HCFC) and hydrofluorocarbon (HFC) refrigerants. When these refrigerants leak into the atmosphere via direct emissions, their environmental impacts can be measured in terms of ozone depletion potential (ODP) and global warming potential (GWP).

But when considering the total equivalent warming impact (TEWI) of commercial refrigeration systems, direct emissions are only part of the equation. TEWI also considers indirect impacts, or the greenhouse gases generated from the energy consumed to run these systems — estimated to represent as much as 95 percent of the total climate impact. At Emerson, we take both energy efficiency and refrigerant GWP into consideration to evaluate the full lifecycle climate performance (LCCP) of a system and its fluids.

Montreal Protocol to complete R-22 phaseout

Today, most global refrigerant regulations are focused on phasing down high-GWP HFCs. But it’s important to remember that these activities have a precedent that’s more than three decades old. In 1987, the Montreal Protocol treaty aimed to phase out ozone-depleting substances (ODS), such as the commonly used HCFC, R-22. This global treaty was since ratified by 197 countries, including the United States, Canada and Mexico, all of whom have followed its recommended phaseout schedule.

The next step in this process will take place in 2020, when the production and import of R-22 will no longer be allowed under the Environmental Protection Agency’s Clean Air Act. It may come as a surprise to some, but there are still untold operators with older refrigeration systems that are currently charged with R-22. Unlike smartphones and other commodities that we change or upgrade every year,  commercial refrigeration equipment can have a lifespan of 20 to 30 years. This phaseout will likely lead to an increase in system retrofits in the near term, especially as operators exhaust their supplies of R-22.

Thankfully, there’s a good deal of evidence that since the removal of ozone-depleting substances from the environment began, the ozone layer is on the mend. Some estimates state that the ozone hole above Antarctica could close by the 2060s.

HFCs targeted for global warming potential

As the HCFC phaseout began decades ago, the industry transitioned to HFCs with very low ODP. Unfortunately, many of these have since been discovered to have varying degrees of GWP. In fact, the most common HFC used in commercial refrigeration is R-404A, which has a GWP of 3,922 and is considered on the high end of the GWP scale. It’s no surprise then that it was among the first refrigerants to be targeted for phasedown under the EPA’s Significant New Alternatives Policy (SNAP) rules 20 and 21.

But per the 2018 ruling by the U.S. Court of Appeals, the EPA no longer has the authority to regulate the use of refrigerants based on their GWP under the framework of the Clean Air Act. While we expect the EPA to soon provide clarity on the future of its HFC initiatives, there currently is no federal mechanism through which the proposed phasedown of high-GWP refrigerants will take place.

In the meantime, California has adopted the original EPA SNAP framework into law, and as of January 1, R-404A and R-507A are no longer allowable in many new commercial refrigeration applications. California is just one of 23 states or territories in the U.S. Climate Alliance that are making commitments to enforce similar climate protection initiatives. Currently, this growing alliance represents half of the U.S. population and more than 50 percent of the national GWP.

Globally, the Kigali Amendment to the Montreal Protocol seeks to expand the treaty’s scope from just ozone protection to addressing global warming by phasing down short-lived climate pollutants, including HFCs. While this amendment has yet to be ratified by the United States, it has achieved the required ratification of 20 member countries to take force — including Canada and the United Kingdom, among others. For participating countries, the Kigali Amendment took effect on January 1.

Exploring the alternatives

Because regulatory variances occur from state to region to country, there are vastly different levels of environmental awareness throughout our industry. While operators in California are cognizant of the state’s efforts to phase down HFCs, there are many U.S. areas where transitioning to lower-GWP refrigerants isn’t as high of a priority.

Regardless, many top retailers have begun the process of exploring low-GWP refrigerant options as part of their sustainability objectives. Not only do they have retrofit plans in place, some are even trialing alternative refrigerant architectures in their stores — with hydrofluoroolefins (HFOs), HFO/HFC blends and natural refrigerants as leading options.

There are relatively minimal retrofit requirements when moving from R-404A to R-448A/R-449A — both A1 HFC/HFO blends — such as adding compressor cooling and other minor system changes. For a greenfield location or a complete system overhaul of an existing site, operators may consider one of many emerging low-GWP options, including:

  • Low-charge ammonia chillers on the roof
  • A2L (mildly flammable) blends in chillers on the roof and machine rooms
  • Distributed, small-charge systems with both A1 and A2L refrigerants
  • R-290 integrated cases outfitted with micro-distributed systems
  • CO2 transcritical and/or cascade systems using CO2 for low temperatures, and an HFO (or lower-GWP HFC) for medium temperatures


Refrigerant management best practices

As always, proper refrigerant management practices are important, regardless of the type of refrigerant used. Operators should start with a documented leak detection plan that includes the necessary tools and early-detection methods to identify and quickly respond to leaks. Leaks are not only bad for the environment; they also degrade refrigeration performance and system energy efficiencies.

With the new class of refrigerants, it’s especially important that technicians are trained to understand proper handling, charging and performance characteristics. In addition, as systems charged with higher-GWP HFCs eventually reach the end of their lifespans, it’s critical that service technicians follow proper recovery and disposal protocols.

Earth Day is a good time to reflect on the environmental progress our industry has made. At Emerson, we’ll continue to support sustainability objectives with compressors, components and systems that are both environmentally responsible and economically viable.

Earth Day: Five Solutions To Protect the Environment and Optimize Retail Operations

Today is Earth Day. What are you doing to help protect the environment?

Green City silhouette with environmental icons

Every day, food retailers face various business challenges: maintaining system uptime, keeping food fresh and safe, reducing energy consumption and staying current on changing regulations, just to name a few. On Earth Day, we’re sharing our insights around five solutions for retailers to make a positive impact on the environment and to optimize facility operations:

  1. Leverage remote monitoring for increased energy savings

Retailers can see benefits storewide by using facility management systems that combine energy management with the ability to monitor various facility systems and provide alerts when issues need attention. Remote monitoring services assess, triage and resolve alarms around the clock. With real-time performance data on energy expenditure, maintenance costs, refrigerant leaks and shrink causes, retailers can make informed decisions for operational improvements.

Monitoring and reporting energy consumption allows the retailer to take action to reduce the energy demand during peak periods. This will have a direct impact on utility bills by reducing total energy costs.

  1. Use setpoint management to protect energy gains

Energy use is one of the most significant operating costs for supermarkets today. Setpoints for HVAC, refrigeration and lighting systems drive most of the store’s energy use.

Setpoint management service helps retailers sustain energy savings in the long term while ensuring that operational issues are actually fixed rather than masked. With setpoint management, retailers can establish optimized benchmarks through e-commissioning or corporate standards for their facility systems.  If changes occur, setpoints can be resolved quickly. Through real-time reporting, data on these setpoints provides retailers with actionable insights to make operational decisions for optimizing energy efficiency, reducing costs and, ultimately, providing a comfortable, positive shopping experience for their customers.

  1. Avoid refrigerant leaks through detection strategies

As some refrigerants commonly used by retailers today are greenhouse gases, and some are ozone-depleting substances, leaks can have a significant impact on the environment. In addition, the renewed regulatory focus on reducing refrigerant leaks leads to a need for retailers to take a closer look at developing effective leak detection strategies.

Retail facilities that implement refrigerant leak detection programs will ultimately reduce refrigerant consumption, avoid costly EPA examinations, prevent potential service disruptions when fixing a leak and take steps to help protect the environment. Retailers should aim to not only establish proper leak detection response protocols, but also institute measures to minimize or eliminate leaks altogether.

  1. Reduce global food waste locally with effective temperature management

Consumers today are increasingly conscious of where their food is coming from and expectations are high when it comes to freshness. Preventing food loss and protecting customers from food-borne illnesses are critical concerns for operators. Retailers need to accurately monitor and report product and case temperatures. Relying on manual temperature recording and tracking methods is risky and time consuming.

Monitoring services provide retailers with the visibility and control of system temperatures throughout their entire enterprise. Customized reports allow retailers to manage alarms and monitor food quality. Approximately $990 billion of food is wasted globally each year. Effective temperature management through facility management systems and remote monitoring along the journey “from farm to fork” will help to reduce food waste, as well as keep customers happy by offering fresh foods.

  1. Promote your sustainability efforts

Today’s consumers want to be associated with brands that not only deliver quality products and experiences, but are also taking steps to positively impact the world. Leading supermarkets and convenience stores are investing in facility management systems and monitoring services that affect store operations, impact bottom line and protect the environment.

Consider promoting your sustainability practices to shed light on the benefits of these investments among both internal and external audiences. An innovative supermarket customer is putting this into action by highlighting sustainability achievements through electronic signage in employee break rooms and recognition of store-level staff. To reinforce their “good neighbor” story among customers, this grocery brand is positioning displays of sustainability reporting, with information from their facility management systems, in entrance areas of more than 900 stores.

What steps is your retail business taking to help protect the environment? Leave your Earth Day tips in the comments below or share them with us on Twitter at @EmersonClimate and @IntelliStore.

For more than 20 years, Emerson Retail Solutions has been helping businesses like yours safeguard food, reduce energy consumption, protect the environment and optimize business results. To learn more about our technology solutions and services for retailers, visit our website


Dean Landeche
Vice President of Marketing, Retail Solutions
Emerson Climate Technologies

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