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Research Article Open access CC BY 3.0

Contributions on Closed System Transformations Based Thermal Cycles

Ramon Ferreiro Garcia, Beatriz Ferreiro Sanz, Cristina Ferreiro Sanz

Current Journal of Applied Science and Technology · pp. 2821–2836 · Published 21 May 2014

10.9734/BJAST/2014/10074

Abstract

The research work is focused on novel feasible structures of non condensing mode trilateral thermal cycles which differs from the recently known trilateral thermal cycles in that the conversion of heat to mechanical work is performed undergoing closed process transformations along with the three state point changes of the cycle. The proposed cycle is characterised by the fact that in its active process, as heat energy is being absorbed under increasing specific volume, entropy and temperature undergoing a load-dependent path function, mechanical work is simultaneously performed, contrary to what happens in conventional Carnot based engines. An analysis of the proposed cycle is carried out and results compared with that of a Carnot cycle operating under the same ratio of temperatures. Into the range of relative low operating temperatures (320 K) high thermal efficiency is achieved reaching 25.4% for hydrogen, 36.3% for helium and 31.8% for argon as working fluids when compared with Carnot Factor (7.8%).

Carnot factor isobaric expansion load-dependent path functions thermal efficiency trilateral cycle

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Cited by 14

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 · 2014

RETRACTED: Low-grade heat-based thermal cycles unconstrained by the Carnot factor doing work by cooling

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

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

Study of the Disruptive Design of a Thermal Power Plant Implemented by Several Power Units Coupled in Cascade

Ramon Ferreiro Garcia · Energy Technology · 2023

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