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Posts tagged ‘global warming potential’

CO2 as a Refrigerant — Criteria for Choosing Refrigerants

This is post number 2 of a series.

How R744 meets different conditions and criteria

Table 1: How R744 meets different conditions and criteria

Multiple factors need to be carefully considered when selecting any refrigerant, including its cooling capacity, safety, environmental impact, ease of use, cost, and availability of components and expertise. Table 1 summarizes these and other key criteria, and shows how well R744 meets them.

In general, the table shows that R744 offers a more superior cooling capacity than conventional refrigerants while meeting the demand for a natural refrigerant with low global warming impact, but presents challenges in both its application and handling.

In the next post, we’ll look at the properties of R744 as a naturally occurring substance.

Andre Patenaude
Director – CO2 Business Development, Emerson Climate Technologies

Visit our website for additional information on CO2 Solutions from Emerson. 
Excerpt from original document; Commercial CO2 Refrigeration Systems, Guide for Subcritical and Transcritical CO2 Applications.

To read all posts in our series on CO2 as a Refrigerant, click on the links below:

  1. Series Introduction
  2. Criteria for Choosing Refrigerants
  3. Properties of R744
  4. Introduction to Trancritical Operation
  5. Five Potential Hazards of R744
  6. Comparison of R744 with Other Refrigerants
  7. R744 Advantages / Disadvantages
  8. Introduction to R744 Systems
  9. Introduction to Retail Transcritical Systems
  10. Retail Booster Systems
  11. Introduction to Retail Cascade Systems
  12. Introduction to Secondary Systems
  13. Selecting the Best System


Making Sense Webinar Series, Mid-Point vs. Dew Point Wrap Up

Earlier this week, I took part in Emerson Climate’s first webinar in our Making Sense Webinar series. Judging from the quality of content presented, the number of participants in attendance, and the high levels of interactivity that took place, it is clear that our webinar series is off to a tremendous start.

We were fortunate enough to have Gustavo Pottker from Honeywell Research Labs as a co-presenter, as his hands-on, real-world experience was a tremendous complement to our discussion about the fundamentals of mid-point and dew point. If you were unable to attend and would like to hear the discussion that took place, the on demand webinar is now available on our website.

One thing that really stood out for me was how interactive the event turned out to be. We had live tweeting throughout the webinar, attendee polls at various intervals, and a question and answer session after our presentation. All in all, this added a collaborative feel to the webinar and confirmed the educational value that we were hoping to deliver through these complimentary, live events.

Our next webinar will take place on August 20 at 2 p.m. EDT/11 a.m. PDT and will address the implementation of low condensing in refrigeration systems, as well as explore the potential that this rarely used method of operation represents. Presenters will be Mike Saunders, director of end user technical sales and support; Mitch Knapke, food retail market manager; and Andre Patenaude from our Canadian office. Through their combined experience, they will re-examine the pros and cons of low condensing refrigeration and inform attendees what energy savings can be achieved.

Learn more about how we’re helping the industry MAKE SENSE of the issues that matter most, and register for our next complimentary webinar by visiting our website at:

View the on-demand version of the Mid-Point vs Dew Point webinar.

Rajan Rajendran, Ph.D
Vice President, Engineering Services and Sustainability
Emerson Climate Technologies

New Webinar Series: Making Sense of Low Global Warming Potential (GWP) Refrigerants

There’s no doubt that the refrigeration industry is in the throes of transition. While regulations around the globe may be in various states of development, one thing is consistent: sustainable, energy-efficient refrigeration systems are in increasing demand. And though it may be difficult to predict when this transition will officially take effect, it won’t be long before refrigeration systems that utilize the lowest GWP refrigerants available will become the norm, not the exception.

As the industry’s most trusted thought leaders on the subject of low GWP refrigerants, Emerson Climate Technologies is out in front on this important issue, engineering innovations that exploit these emerging alternatives. That’s why we’re pleased to announce a free webinar series that explores the promising role of these new refrigerants.

Our webinar series will kick off with a discussion on the fundamentals and difference between mid-point and dew point, including:

  • How to take advantage of refrigerant glide with heat exchanger design
  • How to select the right compressor
  • How to commission and charge a system using refrigerants with glide
  • How to adjust superheat and subcooling with refrigerants with glide

The first webinar takes place on July 16 at 2 p.m. EST / 11 a.m. PST, and will be led by Rajan Rajendran, vice president of engineering services and sustainability. Rajan is responsible for technical support to OEMs and end users for the company’s refrigeration business. He has considerable knowledge of alternate refrigerants as they pertain to air conditioning, heat pump and refrigeration systems in the United States, Europe and Asia.

Autumn Nicholson will also be providing supporting material for the webinar. As a sales engineer for refrigeration customers, Autumn’s focus is on compressor and refrigeration system energy, and TEWI analysis with emphasis on refrigerant alternatives and/or system architecture.

Learn more about how we’re helping the industry MAKE SENSE of the issues that matter most, and register now by visiting our website at


Craig Raney
Director of Marketing, Refrigeration
Emerson Climate Technologies

Making Sense Webinar Series: Addressing the Most Critical Issues in HVACR

HVACR professionals are inundated with rapid progress currently taking place throughout the industry, including: tightening regulations; technological advances; and improvements to equipment and systems. Around the globe, regional regulations are shaping the discussion and influencing refrigerant choices. Technologies that deliver improved HVACR performance efficiencies and reduced carbon footprints are slowly being phased in. With the state of the industry in transition,  it’s no wonder refrigeration professionals are having trouble staying informed.  That’s why Emerson Climate Technologies is introducing a free webinar series to help you MAKE SENSE of it all.

The webinar series will address the promising role of new refrigerants, advancements in energy reduction technologies, and opportunities to improve operational visibility. Register now and keep an eye out for specific topics on each subject as this important series progresses.

Topic One: The Promising Role of New Refrigerants in Refrigeration Equipment

There is a lot of talk about natural refrigerants and other low GWP refrigerants entering the refrigeration market.  Emerson Climate Technologies is on the forefront of this movement, researching and developing systems that are sustainable and energy efficient.

Topic Two: Innovations in Energy-reduction Technologies

The refrigeration industry is ushering in a new era of system and equipment optimization. From the utilization of digital modulation and electronic expansion valves to the applications of scroll and variable speed technologies, improvements in equipment and systems technologies promise tremendous benefits to refrigeration applications.

Topic Three: Improving Operational Visibility

We’ll introduce the latest innovations in refrigeration system electronics and discuss their potential to improve operational visibility. You’ll learn how to utilize enterprise-level electronics data, and discover how compressor electronics in refrigeration systems can provide advanced diagnostics, protection and communications capabilities.

Learn more about how we’re helping the industry MAKE SENSE of the issues that matter most, and register now by visiting our website at

Craig Raney
Director of Marketing, Refrigeration
Emerson Climate Technologies

Low-GWP Refrigerant Alternatives Being Evaluated

AHRI has posted nine final test reports for its Low Global Warming Potential Alternative Refrigerants Evaluation Program (Low-GWP AREP). The reports contain drop-in test results of low-GWP refrigerants in several different types of systems:

  • Chillers
  • Commercial ice machines
  • Residential heat pumps
  • Bottle coolers
  • Trailer refrigeration

This Low-GWP AREP was started over two years ago.  The alternative refrigerants are not ranked, however.  The goal of the program was simply to identify potential refrigerant replacements for high GWP refrigerants (such as R404A, R134a, and R410A) and present performance of these replacements in a consistent and standard manner.

All of the details of the AHRI Low-GWP AREP can be found at:

Emerson Climate Technologies makes sense of refrigerant options in a new presentation:

Rajan Rajendran, Ph.D
Vice President, Engineering Services and Sustainability
Emerson Climate Technologies

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