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Which has zero ozone depletion potential?

Which has zero ozone depletion potential?

Hydrofluorocarbons (HFC) have no chlorine content, so their ODP is essentially zero.

Which has the highest ozone depletion potential?

CFCs have the highest ozone depletion potential of all the types of refrigerants because of the three chlorine atoms it contained. HFCs and HFOs are non ozone depleting since they do not have chlorine atoms. They both have an ODP of 0. But CFCs and HCFCs, contain chlorine atoms.

How much has the ozone layer depleted?

Stratospheric ozone has been depleted by 5 to 6 percent at middle latitudes, but has somewhat rebounded in recent years. The largest recorded Antarctic ozone hole was recorded in 2006, with holes of slightly smaller size since then.

Is the ozone layer still depleting 2021?

Scientists from the Copernicus Atmosphere Monitoring Service confirm that the 2021 Antarctic ozone hole has almost reached its end, following a season with a considerably large and prolonged ozone hole. Its closure will occur only a few days earlier than in 2020, which was the longest lived since 1979.

What is the ODP of R-22?

The ODP for R-22 is 0.05, which is 20 times less than R-11. Global Warming Potential (GWP) : this is the relative indication of the amount of heat trapped in the atmosphere by a certain mass of the gas in question relative to the amount of heat trapped by a similar mass of carbon dioxide.

What is the ODP level for R12?


Refrigerant Type ODP
R12 CFC 0.9
R22 HCFC 0.06
R134a HFC 0
R407C HFC blend 0

How thick is the ozone layer 2021?

3 millimeters thick
Over the Earth’s surface, the ozone layer’s average thickness is about 300 Dobson Units or a layer that is 3 millimeters thick. Ozone in the atmosphere isn’t all packed into a single layer at a certain altitude above the Earth’s surface; it’s dispersed.

How big is the hole in the ozone layer 2022?

9.6 million square miles
According to the joint release, satellite-based measurements revealed that the ozone hole—the total area with ozone column amounts below 220 Dobson units—reached its peak extent on October 7, spanning an area 9.6 million square miles (24.8 million square kilometers), which is roughly the size of North America.

Is there still a hole in ozone layer 2022?

But there’s evidence it’s starting to disappear – and recover more or less as expected, says Solomon. Based on scientific assessments, the ozone layer is expected to return to pre-1980 levels around the middle of the century.

What is ozone depleting potential of R134a refrigerant?

Also, R-134a is a very safe refrigerant with an ASHRAE safety classification of A1. This means it is not flammable and has very low toxicity levels. Because HFC-134a has no chlorine in its molecule, it has a zero ozone-depletion potential (ODP) and doesn’t deplete the stratospheric ozone layer.

What is ODP and GWP of refrigerants?

Ozone Depletion Potential (ODP) of a chemical compound is the relative amount of degradation it can cause to the ozone layer. Global Warming Potential (GWP) is a measure of how much a given mass of a gas contributes to global warming.

What is GWP and ODP?