Clearing up the controversy over CO2 use as refrigerant Boy-oh-boy am I confused. In the July issue of PLANT ENGINEERING on Page 16 you have a article concerning CO2 and its use as a refrigerant. I quote: “Because of its good environmental properties and relative safety, there is renewed interest in carbon dioxide as a refrigerant … But it is now coming back as a natural refrigerant...
Clearing up the controversy over CO2 use as refrigerant
Boy-oh-boy am I confused. In the July issue of PLANT ENGINEERING on Page 16 you have a article concerning CO 2 and its use as a refrigerant. I quote:
“Because of its good environmental properties and relative safety, there is renewed interest in carbon dioxide as a refrigerant… But it is now coming back as a natural refrigerant with no ozone depletion potential and very low global warming potential.”
Well I just saw the movie “An Inconvenient Truth” and it certainly implies that CO 2 does not have good environmental properties and has a very high potential for global warming.
So, can someone unconfuse me?
Broward County, FL
Response from ASHRAE:
The first step in answering this confusion is to clarify the Global Warming Potential (GWP) from refrigeration of any kind.
The major source of GWP emissions are from the CO 2 generated by power plants that produce the electricity that powers the refrigeration systems.
The next consideration deals with the refrigerants themselves, hydrofluorocarbons have about 1,400 times more GWP than the same quantity of CO 2 making CO2 seem relatively harmless by comparison.
CO 2 refrigeration manages to be an excellent choice for the future because the amount of CO 2 released from the various applications is miniscule compared to that released by power plants, and the high Coefficient of Performance (COP) of CO 2 ensures that less power will be needed thereby reducing the amount of CO 2 emissions. The same holds true for other natural refrigerants such as ammonia, propane and water.
While I have not viewed “An Inconvenient Truth”, it is my understanding that the documentary deals with global warming - causes and concerns for the future. Global warming gases are water vapor, carbon dioxide, nitrous oxide, methane, CFC’s and other trace gases.
The engineering community and government regulations continue to strive to reduce both GWP gases and Ozone Depleting Gases, but we must also realize that the health of the global community needs refrigeration to maintain the cold chain to ensure the freshness of food and vaccines.
ASHRAE Presidential Member
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Before the calendar turned, 2016 already had the makings of a pivotal year for manufacturing, and for the world.
There were the big events for the year, including the United States as Partner Country at Hannover Messe in April and the 2016 International Manufacturing Technology Show in Chicago in September. There's also the matter of the U.S. presidential elections in November, which promise to shape policy in manufacturing for years to come.
But the year started with global economic turmoil, as a slowdown in Chinese manufacturing triggered a worldwide stock hiccup that sent values plummeting. The continued plunge in world oil prices has resulted in a slowdown in exploration and, by extension, the manufacture of exploration equipment.
Read more: 2015 Salary Survey