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Research Article Open access CC BY 3.0

Preliminary Study of an Efficient OTEC Using a Thermal Cycle with Closed Thermodynamic Transformations

Ramon Ferreiro Garcia, Beatriz Ferreiro Sanz, Cristina Ferreiro Sanz

Current Journal of Applied Science and Technology · pp. 3840–3855 · Published 17 Jul 2014

10.9734/BJAST/2014/11152

Abstract

The research work is focused on thermal engine structures undergoing isobaric expansion-compression based thermal engines powered by ocean thermal energy. The isobaric expansion-compression based thermal cycles referred to in this paper, differs from the conventional quadrilateral Carnot based thermal cycles in that the conversion of heat to mechanical work is performed assuming a load reaction driven path function, where as heat is being absorbed (isobaric expansion process) and rejected (isobaric compression process), mechanical work is simultaneously performed without the conventional quasi-entropic expansion, contrary to what happens in conventional quadrilateral based Carnot engines. An analysis of the ideal thermal cycle performed by means of an isobaric expansion-compression based cylinder is carried out and results compared with some previously achieved results of conventional technology including that of a Carnot cycle operating under the same ratio of temperatures. Into the range of its inherent low operating temperatures high ideal thermal efficiency is achieved for hydrogen and helium as working fluids. The achieved results associated with a simple and compact machine envisage the way towards a new generation of ocean thermal energy convertor (OTEC) power plants operating with the isobaric expansion-compression based cylinder.

Carnot factor isobaric expansion isobaric compression ocean thermal energy ideal thermal efficiency

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Cited by 19

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A review of research on the closed thermodynamic cycles of ocean thermal energy conversion

Weimin Liu, Xiaojian Xu, Fengyun Chen · Renewable and Sustainable Energy Reviews · 2020

A review of thermodynamic cycles used in low temperature recovery systems over the last two years

Steven Iglesias Garcia, Ramon Ferreiro Garcia, Jose Carbia Carril · Renewable and Sustainable Energy Reviews · 2018

Critical review of the first-law efficiency in different power combined cycle architectures

Steven Iglesias Garcia, Ramon Ferreiro Garcia, Jose Carbia Carril · Energy Conversion and Management · 2017

Review of enhancement for ocean thermal energy conversion system

Safaa Malik Abbas, Hend Dakhel Skhaal Alhassany, David Vera · Journal of Ocean Engineering and Science · 2023

Combined Cycle Consisting of Closed Processes Based Cycle Powered by A Reversible Heat Pump that Exceed Carnot Factor

Ramon Ferreiro Garcia, Jose Carbia carril · JOURNAL OF ADVANCES IN PHYSICS · 2019

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