MUMBAI, India, July 24 -- Intellectual Property India has published a patent application (202621061411 A) filed by Urja Disha Boiler Technologies LLP on May 14, 2026, for A Hot Air Generator With A Heat-Absorbing Fluid Circuit For Improved Thermal Efficiency.
Inventors include Mr. A Krishna Kumar; and Mr. G. S. Deshpande.
The application for the patent was published on July 17, 2026, under issue no. 29/2026.
Abstract: The present invention relates to a hot air generator comprising a combustor or furnace (10), a main flue gas heat exchanger (50), and a combustion air preheater (60). Heat absorbing surfaces (20) disposed within the furnace (10) are connected to a closed-loop intermediate fluid circuit (30) configured to extract heat directly from the combustion zone and transfer the extracted heat to process air through a radiator or primary air heater (40). The intermediate fluid circuit operates under natural circulation or forced circulation using a pump (31). Continuous extraction of heat maintains furnace temperature without introduction of dilution air, thereby reducing excess air requirement to about 40–60% above stoichiometric air and reducing flue gas volume. The arrangement reduces thermal load on the main flue gas heat exchanger (50), enabling reduction in the size of heat exchangers, fans, and ducting, while improving thermal efficiency and reducing auxiliary power consumption.
Disclaimer: Curated by HT Syndication.
