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https://www.boqini-heatrecovery.com/Flue-Gas-Waste-Heat-Recovery-Heat-Exchangers-in-Gas-Turbine-Exhaust-Systems.html
By Jiangsu Boqini Environmental Protection Technology Co., Ltd.
In large-scale industrial operations, energy efficiency is no longer a luxury—it is a necessity. Among the most energy-intensive systems used today are gas turbines, particularly in power generation, petrochemical facilities, and combined heat and power (CHP) plants. While gas turbines are effective for rapid, large-scale energy output, a significant portion of their thermal energy—often up to 50%—is lost through hot exhaust gases. This is where the flue gas waste heat recovery heat exchanger becomes indispensable.
Gas turbines operate at very high temperatures. After fuel combustion, the exhaust gas released can reach temperatures between 450°C and 600°C. Without a recovery system, this thermal energy is vented directly into the atmosphere. Not only is this wasteful, but it also contributes to unnecessary greenhouse gas emissions and elevates the carbon footprint of the plant.
In essence, every cubic meter of untreated flue gas from a gas turbine represents lost energy, lost cost-efficiency, and increased environmental impact.
The flue gas waste heat recovery heat exchanger is specifically designed to intercept this high-temperature exhaust, absorb the thermal energy, and transfer it to a secondary medium, usually water or thermal oil. The heat exchanger typically uses a system of finned tubes, crossflow chambers, or shell-and-tube assemblies that allow efficient thermal conduction without mixing the exhaust gas and the working fluid.
The process is seamless and highly effective:
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Exhaust gas from the turbine enters the recovery unit.
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Heat is transferred through heat exchanger surfaces to the secondary medium.
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The cooled flue gas is then vented, often into further filtration or stack systems.
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The heated working fluid is repurposed—for steam generation, hot water supply, or process heating.
This recovered energy can be fed back into the plant's internal systems or even sold externally in the case of CHP plants.
Using a flue gas waste heat recovery heat exchanger in gas turbine setups offers several key benefits.
Increased Thermal Efficiency
Total system efficiency can rise from 35–40% to over 70% when combined with steam generation or absorption cooling technologies.
Reduced Fuel Consumption
Recovering and reusing waste heat minimizes the need for additional fuel-burning boilers. This translates to lower operational costs and extends the life of primary combustion systems.
Lower Emissions and Environmental Impact
By extracting heat from exhaust gases, CO₂ emissions per kilowatt-hour are drastically reduced. This directly supports carbon reduction strategies and helps companies meet stringent environmental regulations.
Heat for Multiple Industrial Purposes
The heat recovered can be applied in steam generation for process heating, preheating boiler feedwater, absorption chillers, or district heating systems.
Jiangsu Boqini Environmental Protection Technology Co., Ltd. develops robust, tailor-made flue gas waste heat recovery heat exchangers for gas turbines operating under the most demanding conditions.
Key design highlights include high-temperature-resistant materials (stainless steel, Inconel, etc.), corrosion protection against acidic condensates and soot, modular configurations for easy integration and scalability, and automated control systems for real-time temperature and flow monitoring. These exchangers are designed for continuous duty, with minimal maintenance requirements and excellent long-term ROI.
As a trusted supplier of high-performance thermal systems, Jiangsu Boqini Environmental Protection Technology Co., Ltd. delivers durable, high-efficiency solutions that help clients get the most out of every unit of fuel they consume.
Contact us today to learn how our flue gas heat recovery solutions can enhance your gas turbine system’s performance and sustainability.
http://www.boqini-heatrecovery.com
Jiangsu Boqini Environmental Protection Technology Co., Ltd. -
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