Abstract
Performance of micro-channel recuperator has been examined for ultramicro gas turbines. Optimum channel size was obtained to maximize the cycle efficiency under a constant recuperator volume by considering the balance between effectiveness and pressure loss, in which the deterioration of effectiveness due to wall conduction plays an important role. The resulting performance is significantly superior to conventional recuperators. In addition, a novel recuperator using capillary tubes was proposed which has a comparable performance to micro-channel ones.
