The paper is presented based on the concept, theories to be explored, initial design, detailed design, fabrication and construction, and initial testing in the first experimental, compact, closed-cycle (AK process) thermodynamic system. The thermodynamic basis of the closed-cycle-turbine power plant is the Ackeret-Keller or AK process which shows how maximum work can be attained between given temperature limits. Both the Carnot and AK cycles require isothermal compression and expansion over a moderate pressure ratio, the major difference between them being that the Carnot cycle requires the use of additional machinery and the AK cycle needs heat transfer apparatus to achieve the temperature range. Other advantages of the cycle are the low pressures and exotic gases that can be used, such as He and N2. The results of the experimental work to date have shown that the compact, closed gas cycle, employing the basic aerothermodynamic principles as discussed in the paper, can provide a feasible compact reactor system.

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