Design, modelling and validation of a linear Joule Engine generator designed for renewable energy sources

Jia, Boru; Wu, Dawei; Lawrence, Chris; Roskilly, Anthony Paul

doi:10.1016/j.enconman.2018.03.050

Cited by 29 publications

(5 citation statements)

References 33 publications

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“…A fluidic circuit is established which allows the bench to operate in "engine mode", i.e. the compressed air leaving the compression cylinder is divided into two flows: one part passes into the cold buffer (8), then through the heating cartridge (14) and the hot buffer tank (15) to be admitted into the expansion cylinder (11), and the other part passes into a back-pressure regulator (7) which makes it possible to keep the upstream pressure constant. The flow of air delivered by this back-pressure regulator can be measured by the float flow meter (6).…”

Section: The Experimental Set-upmentioning

confidence: 99%

“…Mechanical losses are therefore lower and the cost of the engine is reduced [11]. There are free piston internal combustion engines [12][13][14][15] or free piston Stirling engines [16][17][18] and free liquid piston Stirling engines, also known as Fluidyne. These engines, developed for pumping applications, have a poor efficiency [19][20].…”

Section: Introductionmentioning

confidence: 99%

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First Experimental Results of a New Free Liquid Piston Ericsson Engine

Stouffs

Chouder

Benabdesselam³

et al. 2023

36th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 20

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A new Ericsson free-liquid-piston engine (FLPEE) configuration was previously presented. This consists of a U-shaped tube filled with water in its lower part, and whose two branches are closed by cylinder heads fitted with valves. The space between the surface of the liquid and the cylinder head of one of the branches constitutes the compression space, while this same space constitutes the expansion space in the other branch. The configuration studied operates in an open cycle. This system is able to produce compressed air which can be expanded in an external device to produce mechanical energy. This FLPEE is thought to be suited for the conversion of thermal energy such as solar energy, biomass or flue gases. In this communication, the experimental bench is presented in detail. In particular, the valve control system of the compression and expansion spaces, the various sensors and the data acquisition system are described. Various experimental results are presented, notably in the form of (p, V) indicator diagrams of the compression and expansion cylinders. These results confirm what the theoretical modelling had predicted, namely that it is possible to obtain a set of values of the operational parameters of the system leading to a stable operation of the freepiston system.

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Section: The Experimental Set-upmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

First Experimental Results of a New Free Liquid Piston Ericsson Engine

Stouffs

Chouder

Benabdesselam³

et al. 2023

36th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 20

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“…In 2014, the design was revised for only electric power, 68 and a prototype test rig of an air-standard Joule cycle FPEG with dry lubrication was developed. 69 The FP-LEG dry friction model was analysed, 70 and the coupled engine dynamic and thermodynamic model was developed. 71 Results indicated that the engine performance depended on the working fluid, pressure, valve timing and electric load.…”

Section: Toyota Central Research and Development Labsmentioning

confidence: 99%

Recent progress on performance and control of linear engine generator

Ngwaka

Chen

Qiu

et al. 2022

International Journal of Engine Research

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Linear engines, or widely called free piston engines, have their advantages compared to conventional engines with crankshafts, for example, lower friction loss, compact structure, fuel adaptability, flexible compression ratio, etc. Among the linear engine conceptual designs and prototypes, Linear Engine Generator (LEG) incorporating a linear engine (internal or external combustion) and a linear alternator provides an alternative and attractive solution for hybrid electrical powertrains in transport applications. Due to the advantages of linear engines, hydrogen, synthetic hydrogen carrier fuels and biofuels are easier to adopt on LEG, making it an appealing technology for decarbonisation. This paper explicitly reviews LEG research and development on state-of-art solutions and recent progress in linear engine improvement, linear alternator design optimisation, and integrated LEG system control. Key performance indicators of the linear engine generator, like power output, thermal and electrical efficiency, etc., are summarised to present a general picture of up-to-date LEG development. Recommendations for further LEG development are provided at the end of the paper regarding the review outcomes.

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“…In order to investigate the dynamic characteristics of the overall system, an integrated model has been developed in LMS AMESim to consider the mutual effects of the electrical and mechanical systems. The thermodynamic cycle is based on the work presented in [1][2][3]. This has previously been connected to various electric models [4,5].…”

Section: System Modelmentioning

confidence: 99%

Modelling and build of an integrated linear engine generator designed for power density

Korbekandi¹,

Baker²,

Kulan³

et al. 2021

2021 IEEE Energy Conversion Congress and Exposition (ECCE)

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One possibility for onboard electricity generation in a hybrid vehicle is a free piston engine incorporating an integrated linear generator. This paper presents the modelling and development of the linear engine generator concept, where a linear electrical machine is physically integrated within a free piston engine. Details and results of a multi-physics simulation of this concept are given, with a focus on the design of the electric machine. It is shown that a short translator design can result in the highest power density. This also gives the opportunity for integrating the electric machine physically within the compressor. Details of a prototype demonstrator of the resulting generator-compressor are given.

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Design, modelling and validation of a linear Joule Engine generator designed for renewable energy sources

Cited by 29 publications

References 33 publications

First Experimental Results of a New Free Liquid Piston Ericsson Engine

First Experimental Results of a New Free Liquid Piston Ericsson Engine

Recent progress on performance and control of linear engine generator

Modelling and build of an integrated linear engine generator designed for power density

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