Simulation, design and thermal analysis of a solar Stirling engine using MATLAB

Shazly, J. H.; Hafez, A.Z.; Shenawy, E. T. El; Eteiba, Magdy B.

doi:10.1016/j.enconman.2014.01.001

Cited by 32 publications

(13 citation statements)

References 22 publications

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“…In plain cylinder Stirling engines, heat is exchanged through displacer cylinder end plates [1][2][3]. A light displacer that has low thermal conductivity shuttles the gases between the hot and cold sides.…”

Section: Plain Cylindermentioning

confidence: 99%

Parametric Study of an Air Charged Franchot Engine with Novel Hot and Cold Isothermalizers

Daoud

Friedrich

2017

Inventions

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Abstract:The Stirling engine is an external combustion engine that uses heat exchangers to enhance the addition and removal of energy. This makes the engine power-dense but expensive, less efficient and complicated. In this contribution, the Stirling engine based on the Franchot engine has novel cylindrical fins working as isothermalizers to improve heat transfer without the complications of heat exchangers. Enhancing the power density by isothermalizing work spaces is compared to the bare cylinder optimized by varying the phase angle. The theoretical analysis shows that both the adiabatic and isothermal fins increase the power and efficiency, achieving the Curzon and Ahlborn efficiency at the maximum power point. In comparison to the phase angle method, the finned engine resulted in much lower gas mass flow rate, which leads to a reduction in the regenerator pumping and enthalpy losses. Thus, the Stirling engine has the potential to be simple, cheap, efficient and power-dense, and thus can be used effectively for different applications.

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Section: Plain Cylindermentioning

confidence: 99%

Parametric Study of an Air Charged Franchot Engine with Novel Hot and Cold Isothermalizers

Daoud

Friedrich

2017

Inventions

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“…In engineering science, the Beale number ( B n ) is often used to calculate the power of a SE. So, the next equation presents the power generated by the Stirling engine 53 :

P_{SE} = F \times P_{m} \times V_{SE} \times B_{n},

where F , P m and V SE are the frequency of engine cycle, fluid mean pressure and swept volume, respectively. In addition, by considering SE cyclic period and energy balance in proposed hybrid system, the SE output electricity and efficiency can be determined as 21 :

P_{SE} = \frac{Q_{H} - Q_{L}}{t},

η_{SE} = \frac{Q_{H} - Q_{L}}{Q_{H}},

where Q H and Q L are the heat absorbed from PDC by SE and heat released to the TEG hot end, respectively 21 :

Q_{H} = ([], n \times R \times T_{1} \times italicLnλ) + ([], n \times C_{V} \times ((), 1 - ε_{r}) \times ((), T_{1} - T_{2})),

Q_{L} = ([], n \times R \times T_{2} \times italicLnλ) + ([], n \times C_{V} \times ((), 1 - ε_{r}) \times ((), T_{1} - T_{2})) .

Furthermore, t is the cyclic period and determined by the next equation 25 :

t = \frac{Q_{H}}{h_{1} \times ((), T_{H} - T_{1}) + h_{2} \times ((), T_{H}^{4} - T_{1}^{4})} + \frac{Q_{L}}{h_{3}}

…”

Section: System Descriptionmentioning

confidence: 99%

Numerical investigation of a new combined energy system includes parabolic dish solar collector, Stirling engine and thermoelectric device

et al. 2021

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Summary According to new findings, the use of clean energy sources such as solar energy to supply energy (both electricity and heat) to human societies is essential. On the other hand, choosing the appropriate technology to convert solar energy into useful energy in the form of individual or combined systems is a fundamental issue. Individual solar energy systems have inherently low performance. However, their use in hybrid energy systems with other energy generation devices is key solution and shows high performance. The present work provides the performance of a new combined energy system composed of the parabolic dish solar collector (PDC), Stirling engine (SE) and thermoelectric device (TD) under various parameters. Sun is the main source of energy in this system, where, sunlight is focused on the PDC focal point by the parabolic shaped mirrors. Thus, the useful thermal power is produced by PDC and then feeds to the SE. The operating fluid of the engine is heated by this heat and converted into mechanical energy. Then, the mechanical energy is converted into electricity by a generator connected to the SE and the excess heat is lost from the engine. The exhaust of the SE transferred to the TEG hot end and produces further electricity. In addition, the TEC module absorbs the cooled environment heat and produces cooling energy (by consuming electricity from the TEG). Therefore, the proposed combined process provides the electricity, heat and cooling. The paper is based on the following three scenarios: (1) the system performance is evaluated under constant climatic conditions, (2) climate data from five various cities in Europe and Asia are used for system operation and (3) this scenario presents the general comparison between the two different hybrid energy systems driven by PDC and linear Fresnel reflector (LFR). In addition, multi‐objective optimization is provided to obtain the optimal performance of the developed hybrid system. The optimization results showed that, the optimum total output electricity and overall efficiency were 26.21 kW and 39.17%, respectively. It was also found that, average daily useful power generated by PDC in Moscow on 14‐June is 373.97 W/m2, which is about 11.1%, 1.55%, 33.3% and 14.23% more than Tehran, Beijing, Geneva and Kiev, respectively. Furthermore, increasing the temperature of PDC absorber improves the performance of SE and TD and subsequently improves the overall operation. Also, in terms of the PDC numbers, the system in the cities of Tehran, Beijing and Moscow has a better justification compared to the other two cities (Geneva and Kiev).

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“…The Stirling engines are characterized with high thermal efficiency that is, up to 50%, constant power, flexibility to use any heat source, stationary operation, no explosion and gas escaping, robust design, easy maintenance, and very low noise and vibration level as compared to internal combustion engines 18,23‐25 …”

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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Simulation, design and thermal analysis of a solar Stirling engine using MATLAB

Cited by 32 publications

References 22 publications

Parametric Study of an Air Charged Franchot Engine with Novel Hot and Cold Isothermalizers

Parametric Study of an Air Charged Franchot Engine with Novel Hot and Cold Isothermalizers

Numerical investigation of a new combined energy system includes parabolic dish solar collector, Stirling engine and thermoelectric device

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

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