Feb 4, 2016
CO2/NH3 cascade systems offer food processors a practical way to increase efficiency. By using two centralized refrigeration systems working in unison to provide cooling temperatures, they maximize the effect of carbon dioxide and ammonia. The high-temperature system pulls heat away from the low-temperature system, which in turn uses recirculated liquid to cool the evaporators.
Cascade systems that use CO2 as a secondary refrigerant offer unique advantages. Carbon dioxide is nontoxic and nonflammable, and is also less likely to damage food products in the event of a release. For food plant owners, CO2/NH3 cascade systems offer six key benefits, which are detailed below.
Packaged refrigeration equipment series
Jan 28, 2016
For the past two weeks, we’ve discussed packaged refrigeration equipment: a system that uses ammonia or CO2 and a secondary refrigerant, allowing facilities to reap the benefits of ammonia while also minimizing the charge and risk. We’ve already reviewed the various ways these systems can benefit food processors and discussed the five different types of these low-charge chillers available. However, if you decide to introduce packaged refrigeration equipment into your food manufacturing plant, there are some key questions you must answer before installation to ensure an efficient, smooth installation process.
Takeaways from the Process Cooling webinar
Sep 3, 2015
Recently, Process Cooling hosted a fantastic webinar on ammonia safety, discussing practical advice for industrial refrigeration system operators. As ammonia usage continues to grow with the changing refrigeration landscape, it’s important for all of us to understand ways to keep our plants and personnel safe.
5 key sessions from the annual refrigeration conference
Jul 16, 2015
I recently joined hundreds of refrigeration stakeholders in Atlanta for ATMOsphere America 2015, an annual natural refrigerants conference. Stellar was among the 37 sponsors, and I among the group of 60-plus speakers, leading a presentation on the advantages of packaged refrigeration equipment. I also attended several sessions myself, leaving the conference with valuable takeaways on the refrigeration industry, including my favorites below:
Jun 4, 2015
Did you tune in to our Food Engineering webinar last week? We discussed the changing refrigeration climate, including what you should know about revised compliance schedules, innovative refrigeration technologies and the pros and cons for each. You can check out our full presentation in the SlideShare provided below.
May 28, 2015
Due to its phaseout, an alphabet soup of replacement refrigerants has been developed to replace R-22 in existing chillers. However, most of these alternatives have drawbacks. Some replacements severely penalize the performance of the chiller, while others have significant glide—and all have higher global warming potential than ammonia. And though these refrigerants may not be on the Environmental Protection Agency’s (EPA) phaseout list yet, they have the potential to be. As new chillers rise to replace the old, ammonia is one refrigerant that has become an effective alternative.
May 21, 2015
The majority of industrial refrigeration systems in the U.S. are central-station ammonia systems—the backbone of the food and beverage industry. For over 100 years, these ammonia systems have dominated the industry because they not only have superior thermos-physical properties, but also because they’re environmentally friendly. Ammonia has a global warming potential (GWP) and ozone depletion potential (ODP) of zero.
May 14, 2015
Did you know CO2 has been used in mechanical systems since the 1800s? However, over time, the industry has gravitated away from CO2 toward lower pressure, synthetic refrigerants like Freon. But now that synthetic refrigerants are being phased out due to their negative environmental impacts, it’s time to take a renewed look at CO2 as a viable refrigerant alternative.
From R-22 to Ammonia to New Alternative Technologies
May 7, 2015
The overwhelming majority of climate scientists not only believe in global warming, but believe human activity is to blame. Whether you personally believe this or not, government bodies do. Over the past 30 years, international and national regulatory agencies have responded with legislation that fosters a more sustainable planet. And the attempt to phase out harmful chemicals—including refrigerants—has been constant.
Industrial refrigerants series
Jun 26, 2014
Food processors and distributors are under constant pressure to produce more while spending less on operations. For plant owners looking for greener and more efficient secondary refrigerants, a carbon dioxide (CO2)/ammonia (NH3) cascade system is a viable option. In addition to providing 0 ozone depletion potential (ODP) and 1 global warming potential (GWP), CO2/NH3 cascade systems offer several benefits for food processing and low-temp distribution facilities including: