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A high-efficiency solar Rankine engine with isothermal expansion

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  • Opubo N. Igobo
  • Philip A. Davies

Abstract

Though the principle of the solar Rankine cycle is well known, with several examples reported in the literature, there is yet a scarcity of engines that could be efficiently applied in small-scale (<100 KW) applications. Hence, this paper presents a variant of the engine that uses an isothermal expansion to achieve a theoretical efficiency close to the Carnot limit. Generation of steam inside the power cylinder obviates the need for an external boiler. The device is suitable for slow-moving applications and is of particular interest for driving a batch-desalination process. Preliminary experiments have shown cycle efficiency of 16%, and a high work ratio of 0.997. Copyright , Oxford University Press.

Suggested Citation

  • Opubo N. Igobo & Philip A. Davies, 2013. "A high-efficiency solar Rankine engine with isothermal expansion," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 8(suppl_1), pages 27-33, April.
    • Handle: RePEc:oup:ijlctc:v:8:y:2013:i:suppl_1:p:i27-i33
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    File URL: http://hdl.handle.net/10.1093/ijlct/ctt031
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    Cited by:

    1. Igobo, Opubo N. & Davies, Philip A., 2014. "Review of low-temperature vapour power cycle engines with quasi-isothermal expansion," Energy, Elsevier, vol. 70(C), pages 22-34.

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