There will be approximately 280 million Indians using LPG as of the 1st of February in 2021. Over 300 million people are expected to use Indian products by 2022, according to Indian government projections. An “energy-efficient and environmentally friendly cook-stove” was developed by IIT-Guwahati researchers.
- An “energy-efficient and environmentally friendly cook-stove” was developed by IIT-Guwahati researchers.
- India would have 280 million home LPG users by 1 February 2021.
- The largest fuel refiner Indian Oil said it would import 50% more cooking gas to keep its LPG bottling plants supplied with uninterrupted LPG.
- According to the institute, “the usage of PRB reduces CO and NOx emissions by around 80%, resulting in superior indoor air quality”
- Additionally, this PRB technology can be utilized in industrial furnaces, crematories, and other types of incineration.
- The commercialization ofPRB-based LPG cookstoves in India will provide a large LPG save of roughly 13 lakh household cylinders per day.
India would have 280 million home LPG (liquified petroleum gas) users by 1 February 2021. The Indian government projects that there will be over 300 million consumers by March 2022. The largest fuel refiner Indian Oil said it would import 50% more cooking gas to keep its LPG bottling plants supplied with uninterrupted LPG.
More efficient heating solutions must be found immediately.
To top it all off, the Indian government promotes the use of LPG as a cleaner alternative to coal and firewood, which helps to reduce pollution. However, according to IIT-Guwahati experts, ordinary residential LPG cooking stoves available in the market have low thermal efficiency (60–68 percent) and substantial emissions (CO: 220–550 ppm, NOx: 5–25 ppm).
The Department of Mechanical Engineering at IIT Guwahati, under the leadership of Prof P Muthukumar, has developed a “energy-efficient and environmentally friendly cookstove equipped with Porous Radiant Burners (PRBs), which can provide fuel savings in the range of 25% to 50%, operated with LPG, Biogas, and Kerosene,” in response to this need.
In comparison to its conventional equivalent, the newly developed self-aspirated LPG residential cooking stove with two-layer PRB has a maximum thermal efficiency of 80% and minimal CO (39–64 ppm) and NOx (1–2.5 ppm) emissions, according to the professor.
In addition, this team from IIT-Guwahati has transferred this “energy-efficient and environment-friendly” PRB technology to an industrial partner Agnisumukh Energy Solutions Private Ltd, a Bengaluru-based enterprise that specializes in cooking applications.
According to the institute, “the commercialization of PRB-based LPG cookstoves in India will provide a large LPG save of roughly 13 lakh household cylinders per day and also have a global influence on the burner-based applications.” According to the institute, “the usage of PRB reduces CO and NOx emissions by around 80%, resulting in superior indoor air quality”. Additionally, this PRB technology can be utilized in industrial furnaces, crematories, and other types of incineration.
“We began researching porous medium combustion in 2006 and built the first functional prototype of the PRB with an external air supply around two years later. Several scientific investigations were carried out to improve the self-aspiration mechanism of the burner. Commercially viable PRB for home and commercial cooking was produced in 2018 for the first time. It’s perfect for both gaseous and liquid fuels like LPG, Biogas, PNG, and Kerosene/Methanol/Ethanol cooking,” says Professor Muthukumar of the PRB’s newly designed version.
What’s the deal with this?
Open-air combustion is the primary heat transfer mechanism in Indian LPG cookstoves, known as Free Flame Combustion (FFC). The post-flame zone’s conduction and radiation contributions to the pre-flame zone are negligible in traditional cookstoves. Consequently, due to inadequate heat transfer, these cookstoves are less efficient and have undesirable characteristics such as limited flame spread and high levels of pollutant emissions. As a result, conventional residential cooking stoves have low thermal efficiency and significant emissions.
For the first time, an LPG cooking stove that uses two-layer porous matrices and works in a partially submerged combustion mode instead of direct radiation (which travels at light speed) is on the market. Alumina (Al2O3) matrix serves as the preheating zone (PZ) and silicon carbide (SiC) foam deposited on top of it serves as the combustion zone (Z) in PRB (CZ).
“A partially submerged combustion mode is achieved by starting the combustion process at the interface between the two zones. As a result of the SiC’s large surface area to volume ratio, thermal conductivity, and strong emissivity, a portion of the combustion heat is returned to the PZ, where it is used to warm the incoming air-fuel mix. As a result, the combustion improves heat transport from the burner’s surface to the cooking vessel. PZ area does not burn, and the stove has no flashback (a phenomenon when gas ignites inside the burner),” he says.
Using Less Energy and Less Time
As a result of repeated experiments at IIT Guwahati and feedback from a small number of consumers, Professor Muthukumar claims that PRB LPG stoves for both household and commercial cooking have shown “fuel savings of roughly 30% and 50%, respectively, in contrast with their conventional equivalents.” The PRB-based stoves “save roughly 30 percent time compared to their traditional stoves” in terms of cooking time for a same food menu prepared with the stove.
“The Porous Radiant Burner technology will bring back the greatest standards in thermal control in cooking and industrial applications,” said Agnisumukh CEO Hari Rao.
What all was cooking this week in our startup ecosystem?— E-Cell, IIT Guwahati (@ecelliitg) August 10, 2020
We'll drop it all in this thread. Read on!#ecell_iitg #startups #entrepreneurship #acquisition #covid19 #funding #startupUpdate #iit_guwahati pic.twitter.com/hJcFxpPJt9