ANSYS-Fluent numerical modeling of the solar thermal and hybrid photovoltaic-based solar harvesting systems

Abdelrazik, A. S.; Osama, Ahmed; Allam, Abdelwahab N.; Shboul, Bashar; Sharafeldin, M. A.; Elwardany, Mohamed; Masoud, A. M.

doi:10.1007/s10973-023-12509-2

Cited by 9 publications

(1 citation statement)

References 73 publications

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“…At present, with China's proposal of a "dual carbon" goal, clean energy is receiving increasing attention from people [1]. The synthesis gas produced by a solar thermal chemical reactor using concentrated solar energy to drive high-temperature chemical reactions is a highly efficient and sustainable source of clean energy that has been widely promoted [2].…”

Section: Introductionmentioning

confidence: 99%

Thermal Stress Mechanism of Thermochemical Reactor of 5 kW Solar Simulator with Temperature Distribution as the Load Condition

Huang,

Lin,

Yao

et al. 2024

Processes

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In this paper, a solar thermochemical reactor is designed based on a 5 kW non-coaxial concentrating solar simulator, and a mathematical model is established for thermal calculations. The calculated temperature distribution is used as a load condition for thermal stress analyses. The model is used to study the influence of the solar simulator power, solar reactor inner wall material’s emissivity, working pressure, gas inlet velocity, and thermocouple opening diameter on the thermal stress of the solar reactor. The results show that thermal stress increases with the increase in solar simulator power and the emissivity of the inner wall material in the solar reactor. The inlet velocity and working pressure have little effect on the thermal stress of the reactor and cannot prevent damage to the reactor. In the case of maintaining the diameter of the thermocouple at the front end of the reactor, increasing the diameter of the thermocouple inside the reactor leads to an increase in thermal stress around the reactor. Meanwhile, using a finer thermocouple can reduce the thermal stress inside the reactor and extend its service life, which will provide a foundation for designing practical industrial applications in the future.

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Section: Introductionmentioning

confidence: 99%

Thermal Stress Mechanism of Thermochemical Reactor of 5 kW Solar Simulator with Temperature Distribution as the Load Condition

Huang,

Lin,

Yao

et al. 2024

Processes

View full text Add to dashboard Cite

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Exergy analysis of a gas turbine cycle power plant: a case study of power plant in Egypt

Elwardany,

Nassib,

Mohamed

2024

J Therm Anal Calorim

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This research presents an exergy analysis of a gas turbine power plant situated in Assiut, Egypt, operating under high-temperature conditions. The aim of the study is to assess the performance of the simple gas turbine cycle and identify the sources of thermodynamic inefficiencies using the second law of thermodynamics as a basis for analysis. To accomplish this, a model was developed in EES software utilizing real operational data obtained from the plant's control system. The investigation focused on the impact of varying ambient temperature on the exergy efficiency, exergy destruction, and net power output of the cycle. The results revealed that the combustion chamber accounted for the highest exergy destruction, amounting to 85.22%. This was followed by the compressor at 8.42% and the turbine at 6.36%. The overall energy and exergy efficiencies of the system were determined to be 28.8% and 27.17%, respectively. Furthermore, the study examined the effects of increasing ambient temperature from 0 to 45°C on the system's performance. It was observed that as the temperature rose, the overall exergy efficiency decreased from 27.91 to 26.63%. Simultaneously, the total exergy destruction increased from 126,407 to 138,135 kW. Additionally, the net power output exhibited a decline from 88,084 to 84,051 kW across the same ambient temperature range. These findings highlight the significant influence of ambient temperature on the thermodynamic performance of gas turbine power plants. As temperature rises, a greater amount of exergy is lost, resulting in reduced efficiency and diminished net power output. Therefore, optimizing the design of the combustion chamber is crucial for mitigating the adverse effects of hot weather conditions. The insights obtained from this study can be utilized to enhance the design and operation of gas turbine plants operating in hot climates.

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Analysis of exergy in a dimple-roughened solar thermal collector using MATLAB simulation

Kumar,

Sethi,

Thakur

et al. 2024

J Therm Anal Calorim

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In the current study, the performance of a dimple-roughened solar thermal collector (DRSTC) is investigated within a ($${\text{Re}}_{\text{xx}}$$ Re xx ) range that spans from 3000 to 48,000. Under constant solar intensity ($${I}_{\text{sr}}$$ I sr =1000 $${\text{Wm}}^{-2}$$ Wm - 2 ), relative roughness height ($${e}_{\text{d}}/{D}_{\text{h}}$$ e d / D h ) varied from 0.021 to 0.036, relative roughness pitch ($$p/{e}_{\text{d}}$$ p / e d ) from 10 to 20, arc angle ($${\alpha }_{\text{a}}$$ α a ) from 45 to 60°, and temperature rise parameter from 0.003 to 0.02, and the proposed model predicts exergy efficiency of the SAH, and the results obtained can be used as reference for the design of new solar thermal systems. The assessment makes use of advanced MATLAB simulations in order to evaluate the exergetic efficiency $${(}\eta_{{{\text{ex}}}} )$$ ( η ex ) of a DRSTC. At lower $${\text{Re}}_{\text{xx}}$$ Re xx values, $${(}\eta_{{{\text{ex}}}} )$$ ( η ex ) increases uniformly; however, stabilization and decline occur at higher $${\text{Re}}_{\text{xx}}$$ Re xx values. The highest $${(}\eta_{{{\text{ex}}}} )$$ ( η ex ) for the DRSTC is 1.47% under a temperature rise parameter $$(\Delta T/I_{{{\text{sr}}}} )$$ ( Δ T / I sr ) of 0.0071 $${\text{Km}}^{2}{\text{W}}^{-1}$$ Km 2 W - 1 for obtaining optimum values of $${e}_{\text{d}}/{D}_{\text{h}}$$ e d / D h = 0.036, $$p/{e}_{\text{d}}$$ p / e d = 10, and $$\alpha_{a}$$ α a = 60°. This research illustrates the usefulness of MATLAB for solar energy system analysis and optimization by integrating simulation and experimental data. This investigation further supports the feasibility of the proposed collector design.

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ANSYS-Fluent numerical modeling of the solar thermal and hybrid photovoltaic-based solar harvesting systems

Cited by 9 publications

References 73 publications

Thermal Stress Mechanism of Thermochemical Reactor of 5 kW Solar Simulator with Temperature Distribution as the Load Condition

Thermal Stress Mechanism of Thermochemical Reactor of 5 kW Solar Simulator with Temperature Distribution as the Load Condition

Exergy analysis of a gas turbine cycle power plant: a case study of power plant in Egypt

Analysis of exergy in a dimple-roughened solar thermal collector using MATLAB simulation

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