Modelling, simulation and thermal analysis of a solar dish/Stirling system: A case study in Natal, Brazil

Sandoval, Oscar R.; Caetano, Bryan Castro; Borges, Matheus Ungaretti; García, Juan J.; Valle, Ramón Molina

doi:10.1016/j.enconman.2018.12.005

Cited by 38 publications

(18 citation statements)

References 47 publications

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“…The characteristics of the Stirling engine can be investigated through its internal parameters including pressure, temperature, swept volume, and speed, etc. The Stirling engine performance including Iwamoto's dimensionless parameters, that is, shaft power ( P* ), speed ( N* ), and temperature ( T* ) are described by Equations () in terms of the internal parameters of engine including pressure, temperature, and speed 46 . The pressure, temperature, and speed of the Stirling engine increase with the intensity of solar radiations 38 …”

Section: Design Development and Performance Evaluation Of Csp‐dssmentioning

confidence: 99%

A review study on mathematical modeling of solar parabolic d ish‐Stirling system used for electricity generation

et al. 2021

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Summary The intensity of the solar radiations falling on the earth surface ranges between 5 and 7.5 kWh/m2/day. For the non‐directed solar thermal application, higher intensity level is required. The Concentrating Solar Power (CSP) technology incorporating reflecting mirrors reinforces the solar radiations with high intensity. It is suitable for various applications; that is, space heating, space cooling, and cooking, steam, and power generation without any polluted emissions. Meanwhile, among the various CSP technologies, the Concentrating Solar Parabolic Dish Stirling engine System (CSP‐DSS) has got attention of the research community due to its various attractive features. The output power and efficiency of the CSP‐DSS depend upon their geometrical, optical, and operating parameters. It is therefore, necessary to mathematically investigate the influence of these parameters on system performance before its design and installation. In the existing literature reported, only some specific parameters of the CSP‐DSS have been focused and considered to investigate the system performance. To the best of author's knowledge, no literature has been found to provide the mathematical modeling of all the system parameters in a single manuscript to study and investigate their influence on the system performance. Hence, this review article aims to compile, expansively review and organize the systematical mathematical modeling for all optical, geometrical, and operating parameters of the CSP‐DSS along with the system design methodology. Likewise, the effects of these parameters on the system output power and efficiency under various operating conditions have been investigated. In addition, comprehensive study of CSP‐DSS components along with their classification have been painstakingly discussed to determine optimal system configuration. Finally, the latest review study in the field of CSP‐DSS have been deeply and comprehensively discussed. This review study concludes that, the kinematic gamma type Stirling engine coupled with Permanent Magnet DC generator (PMDC) and Azimuth‐Altitude Dual Axis Tracker (AADAT) could be the better CSP‐DSS design and configuration in context of the standalone off‐grid electricity generation system.

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Section: Design Development and Performance Evaluation Of Csp‐dssmentioning

confidence: 99%

A review study on mathematical modeling of solar parabolic d ish‐Stirling system used for electricity generation

et al. 2021

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“…Fast-responding solenoid valves HV and LV are used to regulate the mean pressure p mean of the hydrogen in the engine cylinder by controlling the mass exchange rate gA HV and gA LV respectively [11]. The control law, described by Equations (6) and (7), is such that if a positive valve command c is given, HV will open to allow hydrogen to flow into the cylinder while LV will close. This will increase both the mass and mean pressure of the hydrogen in the cylinder.…”

Section: Hydrogen Supply System Modelmentioning

confidence: 99%

“…A thermal model of a cavity receiver is developed for optimization in [6] where radiative exchange is evaluated using the radiosity method. The authors in [7] show that the global energy efficiency ranges between 19% and 26%, which can be achieved through optimal design based on a modified Iwamoto model of a Stirling engine and a solar prediction model. Further increase of utilization and efficiency can be achieved by incorporating novel components such as a free-piston Stirling engine [8], high-temperature superconducting linear synchronous generator [9], or integrated thermal energy storage [10].…”

Section: Introductionmentioning

confidence: 99%

Particle Swarm Optimization-Based Power and Temperature Control Scheme for Grid-Connected DFIG-Based Dish-Stirling Solar-Thermal System

Li¹,

Xiong²,

Su³

et al. 2019

Energies

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Variable-speed operation of a dish-Stirling (DS) concentrated solar-thermal power generating system can achieve higher energy conversion efficiency compared to the conventional fixed-speed operation system. However, tuning of the controllers for the existing control schemes is cumbersome due to the presence of a large number of control parameters. This paper proposes a new control system design approach for the doubly-fed induction generator (DFIG)-based DS system to achieve maximum power point tracking and constant receiver temperature regulation. Based on a developed thermo-electro-pneumatic model, a coordinated torque and mean pressure control scheme is proposed. Through steady-state analysis, the optimal torque is calculated using the measured insolation and it serves as the tracking reference for direct torque control of the DFIG. To minimize the tracking error due to temperature variation and the compressor loss of the hydrogen supply system, four optimal control parameters are determined using particle swarm optimization (PSO). Model-order reduction and the process of the pre-examination of system stability are incorporated into the PSO algorithm, and it effectively reduces the search effort for the best solution to achieve maximum power point tracking and maintain the temperature around the set-point. The results from computational simulations are presented to show the efficacy of the proposed scheme in supplying the grid system with smoothened maximum power generation as the solar irradiance varies.

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“…Castellanos et al [4] propose a mathematical DS model intended for the optimal opto-geometric design of the concentrator and heat receiver, and the model is validated experimentally in [5]. A methodology is developed in [6] using a modified Iwamoto mathematical model of Stirling engine and a solar prediction model to evaluate the performance of a DS system. The authors show that global energy efficiency ranges between 19-26%.…”

Section: Introductionmentioning

confidence: 99%

“…The derivation of (6d) is provided in Section I of the Supplementary Materials, while the expressions of K hp , K hw , K mp and K mw are given in Appendix B.Using (A6) and (4)-(6), one can derive the transfer function between P DS and ω m * as (see Section II of the Supplementary Materials for details)…”

mentioning

confidence: 99%

Combined Primary Frequency and Virtual Inertia Response Control Scheme of a Variable-Speed Dish-Stirling System

Choi

Vilathgamuwa

et al. 2020

IEEE Access

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The potential of variable-speed dish-Stirling (VSDS) solar-thermal generating plant in providing grid frequency support is investigated. In the proposed VSDS frequency support control scheme, the reference speed of the Stirling engine is regulated to track a deloaded power curve which is governed by the solar insolation level. The gain of a supplementary speed-frequency droop controller is then set to meet the primary frequency control requirement. Further uniqueness of the VSDS control scheme pertains to the provision of virtual inertia response by regulating the kinetic energy in the rotating mass of the enginegenerator and the thermal energy in the heat absorber/receivers. Small-signal analysis shows that the frequency support scheme is inherently stable, and it will provide higher degree of damping as the penetration level of the VSDS system and/or the solar insolation level increase. The efficacy of the proposed scheme is validated by computer simulation.

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Modelling, simulation and thermal analysis of a solar dish/Stirling system: A case study in Natal, Brazil

Cited by 38 publications

References 47 publications

A review study on mathematical modeling of solar parabolic d ish‐Stirling system used for electricity generation

A review study on mathematical modeling of solar parabolic d ish‐Stirling system used for electricity generation

Particle Swarm Optimization-Based Power and Temperature Control Scheme for Grid-Connected DFIG-Based Dish-Stirling Solar-Thermal System

Combined Primary Frequency and Virtual Inertia Response Control Scheme of a Variable-Speed Dish-Stirling System

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