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Want to live a sustainable and calm life? Choose more fans and less AC

April 18, 2022 12:32 is

Sydney [Australia]April 18 (ANI): Electric fans are an effective and sustainable alternative for circulating air indoors compared to air conditioners without sacrificing comfort, according to a new study by the University of Sydney.
The study’s findings were conducted in the journal ‘The Lancet Planetary Health’ by an international team of experts from the University of Sydney in conjunction with Monash University, Newcastle University and Radboud University Medical Center based in the Netherlands.
Studies have found that using indoor fans more often can help people reduce their air conditioner use without changing how hot they feel, potentially reducing future energy use and greenhouse gas emissions. pave the way.
Using an indoor fan can raise 3 to 4 °C higher than using an air conditioner alone before it becomes uncomfortable for humans (and the main reason for reaching for the air conditioner remote during hot weather). .
The researchers also conducted a cost-benefit analysis on the environmental impact and found that the overall benefit (from a greenhouse emissions standpoint) of using fans to reduce air conditioner use far exceeded the switch from incandescent light bulbs to LEDs. Went.
Modeling led by the University of Sydney found that slightly increasing indoor air movement by fans could reduce electricity consumption and the associated annual cost of cooling indoor spaces with air conditioners by about 70 percent in Australia.
Studies using fans still maintained the same comfort level as lower indoor temperatures with regular air conditioner use – despite warmer indoor conditions due to less air conditioner use.
The work shows that switching to widespread indoor fan use can potentially reduce energy demand and greenhouse gas emissions.
The main thing is the way electric fans work to cool the human body as compared to air conditioners. Electric fans generate higher airspeeds across the surface of the skin to achieve higher heat loss despite hot temperatures, while air conditioners themselves are lower temperatures with lower air speeds.

“Through their sole purpose of reducing air temperatures, air conditioners feed a cycle of high power consumption – often delivered by fossil fuel power stations which in turn contributes to a further increase in emissions,” Co-senior author Professor Oli Jay, Director of the Heat and Health Research Incubator at the Faculty of Medicine and Health.
Dr Arunima Malik, Senior Lecturer in the School of Physics and School of Sustainability, said, “The latest ‘IPCC Sixth Assessment Report on Climate Change Mitigation’ emphasizes the need to adopt a low emission lifestyle including cooling options for thermal comfort.” Vocational School.
“Our study confirms that low-cost solutions such as fans have the potential to reduce emissions to meet the goals of the Paris Agreement”.
The researchers compared energy use and associated greenhouse gas emissions by modeling five scenarios with different combinations of fan and air conditioner use. This included situations with fans running at different speed settings.
After logging data on the effect of fans on human comfort levels, air conditioner use, and the number above thermal comfort limits to determine the associated energy use and greenhouse gas emissions before they begin to feel discomfort was calculated.
“To perform this calculation we need to process hourly temperature data for the entire continent on a 150,000-cell raster grid. We were able to do this using a supercomputer,” said co-senior author Professor Manfred Lenzen said school of physics.
They found that operating fans with airspeeds of 1*2 m/s with occasional air conditioner use resulted in a 76 percent reduction in energy use (5592 GWh to 1344 GWh) and associated greenhouse gas emissions, compared to air conditioners alone. ( 5091 kilotons to 1208 kilotons).
“We know that stopping greenhouse gas emissions is the only way we can limit global warming in the future,” said Professor J.
“By increasing indoor air circulation with fans, you can feel the same at a higher temperature as you would at a lower temperature using an air conditioning unit. It’s actually an easy task that most people now use to reduce singular emissions.” Cooling in Australia is linked to home and indoor spaces,” said Professor J. (ANI)

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