Gas Heat Recovery Heat Exchangers For Small/Medium Gas Engines, Turbines & Clean Flue Gases (up To 600°C)

Gas Heat Recovery Heat Exchangers for Small/Medium Gas Engines, Turbines & Clean Flue Gases (up to 600°C)

Gas heat recovery heat exchangers (GHREs) designed for small/medium gas engines, turbines, and clean process flue gases (≤600°C) are critical equipment for improving energy efficiency in industrial, power generation, and cogeneration applications. Their core function is to capture waste heat from high-temperature exhaust streams (typically 200–600°C) and transfer it to a "cold side" fluid (e.g., water, glycol, air, or process fluids), converting otherwise wasted energy into usable heat or preheated media.

Finned tube designs are the go-to choice for gas-to-liquid (e.g., exhaust-to-water) or gas-to-gas recovery, as they solve a critical challenge: gases have low heat transfer coefficients (compared to liquids). Fins increase the gas-side heat transfer area (by 5–20x), drastically boosting efficiency.
Subtypes for This Use Case:
Louvered Fins: Ideal for gas engines/turbines with variable exhaust flow. Louvers break up boundary layers (stagnant gas near the tube surface), improving heat transfer without excessive pressure drop.
Wavy Fins: Better for stable clean flue gases. The wavy shape creates turbulence, enhancing efficiency while maintaining a compact footprint.
Extruded Fins: For higher durability (e.g., 500–600°C flue gases). Fins are extruded directly from the tube material (no bonding), reducing risk of delamination at high temps.