Abstract Linear compressors have started to apply in refrigeration owing their oil-free operation, capacity modulation by variable stroke and higher seasonal efficiency. Nevertheless, linear are subject a high seal leakage loss piston offset (drift), particularly at pressure ratios. Meanwhile, there is reduction the accuracy of resonant frequency prediction due very nonlinear gas spring ratios,...

determination of the starter torque-speed diagram is a major task in the design or selection of a proper gas turbine starter. in this paper, the maximum power of the mgt-40 gas turbine starter was calculated based on the dynamics of the rotor, start-up logic, and compressor map. in a recent research, the pressure ratio was assumed as a linear function of the rotor speed and the required starter...