Theoretical analysis of the performance and optimization of indirect flat evaporative coolers

Asemi, Hamidreza; Zahedi, Rahim; Daneshgar, Sareh

doi:10.55670/fpll.fuen.2.1.2

Cited by 7 publications

(4 citation statements)

References 11 publications

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“…The reactions performed inside the fuel cell stack are reforming, shifting, and general electrochemical reaction which proceeds in Eq. (11) , (12) , (13) ) at molar rates of

, and

, respectively [ 42 ].

In this research, because of high temperature of the operating SOFC and the less price, the reforming reaction inside the fuel cell is used, so that the reaction of reforming is performed inside the anode of the fuel cell and in this case, no external reforming is required.…”

Section: Methodsmentioning

confidence: 99%

Exergy-economic assessment of a hybrid power, cooling and heating generation system based on SOFC

Zahedi

Forootan

Ahmadi

et al. 2023

Heliyon

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“…The reactions performed inside the fuel cell stack are reforming, shifting, and general electrochemical reaction which proceeds in Eq. (11) , (12) , (13) ) at molar rates of

, and

, respectively [ 42 ].

Section: Methodsmentioning

confidence: 99%

Exergy-economic assessment of a hybrid power, cooling and heating generation system based on SOFC

Zahedi

Forootan

Ahmadi

et al. 2023

Heliyon

Self Cite

View full text Add to dashboard Cite

“…In PIV, tracer particles with a specific gravity close to the fluid flow are injected into the fluid without affecting its velocity [97] . These particles move at the same local velocity as the fluid.…”

Section: Flow Field Visualization By Particle Image Velocimetry (Piv)mentioning

confidence: 99%

Fundamentals of different wind turbines for electricity generation and their modelling methods using different algorithms

Zohreh,

Sheshbahreh,

Ghorbani

et al. 2023

I-ES

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Increased concern for the environment has led to the search for more environment-friendly energy sources so that wind energy can be used as an endless option for human consumption. Wind turbines offer a promising solution for off-grid areas. However, they have certain drawbacks associated with different configurations. Darrieus turbine is one type that can be more efficient than other types. The poor start-up performance of Darrieus turbines is one of the critical problems restricting its development. Another problem of this kind of wind turbine is tackled by identifying the optimization parameters, such as complex flow dynamics around the system. The present article reviews modeling vertical axis turbines methods and discusses the turbine’s operation by presenting the results of these methods. In this review, the authors have attempted to compile the main aerodynamic models that have been used for performance prediction and design of straight-bladed Darrieus-type VAWT. The main object of this study is to research the advantages and disadvantages of wind turbine modeling methods, and the selection of these methods depends on the purpose of the modeling.

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“…Today, improving efficiency and reducing energy loss are some of the most important issues in engineering. To achieve the optimal use of energy, much work has been performed on the optimization of energy systems, such as optimizing the gas microturbine cycle by bee algorithm [13], adopting phase change materials in freezers [14] and optimizing indirect flat evaporative coolers using exergy analysis [15]. Therefore, before we optimize the use of gas energy in two-phase flows, it is important to understand the approaches through which the gas transfers its potential pressure energy to the liquid's kinetic energy in variable cross-sectional tubes.…”

Section: Introductionmentioning

confidence: 99%

Interphase Mechanical Energy Transfer of Gas-Liquid Flow in Variable Cross-Section Tubes

Feng

Yang

Li-zi

et al. 2023

JMSE

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The use of gas energy includes a wide range of applications to directly accelerate the liquid in a pipeline without the aid of mechanical equipment, such as marine gas-liquid jet propulsion. To clarify the characteristics of energy transfer by interphase forces for gas-liquid flows in variable cross-section tubes, two-fluid models of annular flow, bubbly flow and homogeneous flow were adopted, respectively, along with four newly elaborated coefficients, which are the work factor of gas fg, reflecting the relative ability of gas to power liquid, the interface work transfer coefficient kg (representing the relative magnitude of mechanical work received by liquid from gas), the interphase work-to-energy conversion coefficient kl (denoting the capability of energy transfer through work performed by interphase forces) and the interphase mechanical efficiency ηw. The results reveal the interphase work transfer is strongly influenced by the structural parameters of the tubes (or nozzles), and an optimized design is necessary to improve the performance. The higher the degree of gas dispersion in the liquid, the more advantageous the conversion of gas work into the liquid’s mechanical energy. Of these three flow patterns, annular flow has the lowest kl and ηw (kl = 0.0797, ηw = 0.9885 in present example), while homogeneous flow displays the limit of interphase mechanical energy conversion because the gas-liquid momentum coupling reaches the maximum (kl = 0.9979, ηw = 1).

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Theoretical analysis of the performance and optimization of indirect flat evaporative coolers

Cited by 7 publications

References 11 publications

Exergy-economic assessment of a hybrid power, cooling and heating generation system based on SOFC

Exergy-economic assessment of a hybrid power, cooling and heating generation system based on SOFC

Fundamentals of different wind turbines for electricity generation and their modelling methods using different algorithms

Interphase Mechanical Energy Transfer of Gas-Liquid Flow in Variable Cross-Section Tubes

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