Conclusions

In this chapter, the most significant non-ideal phenomena that can degrade the perfor­mance of a Stirling engines were highlighted and discussed. Fluid flow dissipation at heat exchangers, temperature drop at heater and cooler, the regenerator ineffectiveness, gas spring hysteresis loss, clearance seal leakage, and direct conduction were among parasitic losses that were presented. In each case, appropriate mathematical models were introduced which could be incorporated in design spreadsheets or computer simulations. Figure 3.3 summarizes the discussion of this chapter and depicts the energy balance diagram of a typ­ical Stirling engine showing how each parasitic loss affects the output power or efficiency of the engine.

Conclusions

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