A high-efficiency solar rankine engine with isothermal expansion

Opubo N. Igobo, Philip A. Davies*

*Corresponding author for this work

Research output: Contribution to journalSpecial issue

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.

Original languageEnglish
Pages (from-to)i27-i33
Number of pages7
JournalInternational Journal of Low-Carbon Technologies
Volume8
Issue numberSuppl.1
DOIs
Publication statusPublished - 12 May 2013
EventHeat Powered Cycles conference 2012 - Alkmaar, Netherlands
Duration: 10 Sep 201212 Sep 2012

Fingerprint

Plant expansion
engine
Engines
Rankine cycle
Desalination
Engine cylinders
solar cycle
desalination
Boilers
Steam
experiment
Experiments
need
boiler

Bibliographical note

Heat Powered Cycles conference 2012 (HPC 2012), 10 Sep 2012 - 12 Sep 2012, Alkmaar, Netherlands

Keywords

  • rankine cycle
  • solar energy

Cite this

Igobo, Opubo N. ; Davies, Philip A. / A high-efficiency solar rankine engine with isothermal expansion. In: International Journal of Low-Carbon Technologies. 2013 ; Vol. 8, No. Suppl.1. pp. i27-i33.
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A high-efficiency solar rankine engine with isothermal expansion. / Igobo, Opubo N.; Davies, Philip A.

In: International Journal of Low-Carbon Technologies, Vol. 8, No. Suppl.1, 12.05.2013, p. i27-i33.

Research output: Contribution to journalSpecial issue

TY - JOUR

T1 - A high-efficiency solar rankine engine with isothermal expansion

AU - Igobo, Opubo N.

AU - Davies, Philip A.

N1 - Heat Powered Cycles conference 2012 (HPC 2012), 10 Sep 2012 - 12 Sep 2012, Alkmaar, Netherlands

PY - 2013/5/12

Y1 - 2013/5/12

N2 - 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.

AB - 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.

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KW - solar energy

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