Microturbines face significant technological challenges primarily due to issues with aerodynamics, which do not scale effectively as size decreases. As the turbine size shrinks, the required shaft speed increases, complicating both analysis and manufacturing. The heat absorption of turbine materials also presents a limitation, particularly with high-pressure turbine components that are sensitive to temperature extremes. The definition of "micro" varies, with some companies producing small turbine engines that do not fit the micro category. Overall, the complexities of aerodynamics and material limitations hinder the widespread adoption of microturbines.
