Rhombic drive Beta type

elop g in esis e c nes tha with c ifferent configuration [3] as follows: (1) a-typee this type of configuration features two pistons, each in its own cylinder; (2) b-type e this type of configuration has a piston and a displacer in the same cylinder; and processes. However, in 1859 Rankine [6] already mentioned that neither the heating nor the cooling takes place exactly at constant volumes or at constant temperatures. A simple second-order analysis of the ideal Stirling engine cycle was proposed by G. Schmidt in 1871 [7]. The Schmidt analysis has been used widely as an approximation of Stirling engine performance, and Bercho-witz and Urieli [8] gave a detailed description of it. The Schmidt analysis takes the isothermal analysis of Stirling engines one step further by assuming that the volume of the expansion and th