Sunday, October 2, 2022

Propane – a solution for more sustainable air conditioning

Current severe heat waves that are likely to increase in severity and frequency in the future are increasing the use of air conditioners, threatening the environment with their high energy consumption and refrigerants with high warming potential. A new study finds that switching to propane as a refrigerant may reduce the rise in global temperatures from space cooling.

We expend enormous amounts of energy fighting the heat at low latitudes in the summer, or throughout the year – one-tenth of the total worldwide electricity supply. If current temperature trends continue, the energy demand for space-coolers will more than triple by 2050. In addition to increasing energy consumption, space-coolers also endanger the environment in various ways: by using halogenated refrigerants with high global warming potential.

Split-air conditioners (Split ACs) that use a single indoor and outdoor air unit connected by pipes are the most common equipment used for space-cooling. They mostly use HCFC-22 and HFC-410 as refrigerants, both of which are characterized by a very high Global Warming Potential score, up to 2,256 – meaning they will burn more than carbon dioxide in 100 years. 2,256 times more heat is trapped. Urged by the Kigali Amendment to the Montreal Protocol, many manufacturers are looking for alternative refrigerants with low Global Warming Potential scores, such as HFC-32. However, with a global warming potential score of 771, HFC-32 still remains a significant climate threat.

A study led by IIASA researcher Pallav Purohit in collaboration with researchers from the United Nations Environment Program and the University of Leeds showed that by switching to propane, an alternative low (<1) global warming potential refrigerant for space cooling, We can avoid a 0.09 °C increase in global temperature by the end of the century, which has contributed significantly to keeping global temperature rise below 1.5 °C.

in a study published in Proceedings of the National Academy of Sciences (PNAS), The researchers used the IIASA Greenhouse Gas – Air Pollution Interactions and Synergies (GAINS) model to compare baseline halogenated refrigerant emissions scenarios with scenarios for switching to HFC-32 or propane. While switching to HFC-32 also reduced global temperature rise (0.03 °C by the end of the century), propane proved to be the better solution in terms of stability.

Purohit says, “Propane exhibits significant environmental benefits through good energy performance and a global warming potential of less than 1. In split-ACs of up to 7 kW, propane is a technically valid alternative to HFC-powered split-ACs. can be classified as

Energy-efficient split-ACs that use propane are already commercially available in the Chinese and Indian markets. Despite having similar performance to split-AC using the HFC-32, and even better than the currently widespread equipment using the HFC-410A and HCFC-22, some national regulations restrict their use, primarily Standards and codes prohibit the use of high flammability refrigerants. , hindering their widespread adoption.

“Achieving the EU’s ambitious 2050 climate neutrality goals, early and aggressive action is needed. In the short term, the urgency to update standards for policymakers from transitioning new air conditioning systems to more environmentally friendly refrigerants Underlining this, their climate impact can be significantly reduced,” concluded Purohit.

Nation World News Desk
Nation World News Desk
Nation World News is the fastest emerging news website covering all the latest news, world’s top stories, science news entertainment sports cricket’s latest discoveries, new technology gadgets, politics news, and more.
Latest news
Related news
- Advertisement -