Flue gas heating unit

The unit is integrated with the power generation equipment of a gas-fired trigeneration system. Using high-temperature flue gas as a driving force, it extracts heat from low-grade energy sources (soil, groundwater, and sewage) without increasing other energy consumption, while simultaneously reducing the flue gas exhaust temperature to below 30°C. In winter heating mode, the system’s heating capacity can be increased by 50% compared to traditional absorption chillers. In summer cooling mode, the unit serves as a cooling source for the central air conditioning system, re-injecting heat that would otherwise be discharged to the environment through the cooling tower back into the ground. This achieves a balanced heat extraction and release from the ground in both winter and summer, ensuring long-term stable system operation.