Experimental study on the performance of an oscillating water column by considering the interaction effects of optimal installation depth and dimensionless hydrodynamic coefficients for the Caspian Sea waves characteristics

Kharkeshi, Behrad Alizadeh; Shafaghat, Rouzbeh; Jahanian, Omid; Alamian, Rezvan; Rezanejad, K.

doi:10.1016/j.oceaneng.2022.111513

Cited by 10 publications

(5 citation statements)

References 17 publications

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“…Velocity meter (GM816A) 0.1 (m/s) Temperature and humidity sensor (AM1001) 0.1(℃) for Temperature 3% for humidity u is the uncertainty and U is the combined uncertainty with a coverage factor of k. According to the data presented in Table 3, the reliability of the experimental data stands at over 95% [24].…”

Section: Measurement Accuracy Imagementioning

confidence: 99%

An Experimental Study to Apply an Absorption Refrigeration Cycle as a Dehumidifier in Humidification-Dehumidification Solar Desalination System

Aghajani Afghan,

Shafaghat,

Aghajani Afghan

et al. 2023

IJEE

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In this paper, the performance of a hybrid humidification-dehumidification (HDH) desalination system is experimentally studied. The system operates as an Open-Air Closed-Water cycle and utilizes a solar air heater to heat the input air to the humidifier. An Ammonia absorption refrigeration cooling cycle is used to condense the humid air, producing fresh water. Parameters such as temperature and relative humidity were measured in different stages of the system by using humidity and temperature sensors, and the thermodynamic analysis was carried out using EES software. The effects of the mass flow rate and temperature of the inlet air flow on the rate of desalination, COP, GOR, and the efficiency of the humidifier and the dehumidifier were studied. The analysis proved that the highest rate of water production and GOR were 150 g/h and 1.2, respectively. It was also perceived that with an increase in the air mass flow rate, the rate of water production and COP increased, while GOR and the efficiency of the dehumidifier diminished. This is while the efficiency of the humidifier remains nearly constant. It was also concluded that an increase in the temperature of the input air, leads to a fall in the GOR, while the other parameters show an increasing trend. Following the economic analysis of the system, the CPL was found to be $0.16 /L.

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Section: Measurement Accuracy Imagementioning

confidence: 99%

An Experimental Study to Apply an Absorption Refrigeration Cycle as a Dehumidifier in Humidification-Dehumidification Solar Desalination System

Aghajani Afghan,

Shafaghat,

Aghajani Afghan

et al. 2023

IJEE

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“…Based on the measurements performed, 15 different experimental test cases were examined with 3 input flow rates of 1.2, 2.4, and 3.6 (lit/s) at 5 electrical resistances of 10, 20, 30, 40, and 50 Ohms. According to the equations related to uncertainty analysis, suitable uncertainty for experimental tests is obtained by repeating each test 5 times [24], [32], [33].…”

Section: Design Of Experimentsmentioning

confidence: 99%

Enhancing Performance Evaluation of Archimedes Screw Turbines under Optimal Conditions: A Focus on Flow Rate Analysis, Empirical Equations, and Comparative Scaling Methods

Zamani,

Shafaghat,

Alizadeh Kharkeshi

2024

IJEE

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“…According to the π-Buckingham theory [25], based on number of variables in Equation ( 17), three dimensionless groups can be made in the form of the following equations.…”

Section: 3 Dimensionless Governing Equationsmentioning

confidence: 99%

“…𝑚 (25) where 𝑥 𝑖 and 𝑥̅ will be the parameter's value in each experiment and the average value of the parameter, respectively. In the continuation of the uncertainty analysis process, the standard deviation of the measured values and the standard deviation of the average of the measured values are determined according to Equations ( 26) and (27), respectively [25].…”

Section: Uncertainty Analysismentioning

confidence: 99%

Experimental Investigation on the Effect of Flow Rate and Load on the Hydrodynamic Behavior and Performance of an Archimedes Screw Turbine

Zamani

Shafaghat

Kharkeshi

2023

IJE

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One of the best solutions to overcome problems caused by fossil fuel consumption is using renewable energy. In this research, effect of flow rate and load on the performance of an Archimedes turbine was experimentally studied. At first, Archimedes turbine with optimal size was made using 3D printer technology. Then it was placed in the river simulation setup. After the calibration and uncertainty analysis, tests were performed for three flow rates and five electrical resistances. The results showed that increasing the flow rate leads to a rise in power, torque, and angular velocity of the turbine, but it leads to a non-linear behavior in efficiency. On the other hand, an increase in electrical load has also led to a decrease in converter performance for all conditions. In addition, by implementing π-Buckingham theory, the converter's hydrodynamic behavior was studied by using Reynolds numbers, dimensionless flow, and power coefficiency. The results showed that an increase in Reynolds number leads to a decrease in power coefficiency. However, an increase in dimensionless flow increases the power coefficiency first and then decreases (nonlinear behavior). In addition, the Archimedes screw turbine was also studied from an economic point of view, and the results showed that increasing discount rate leads to an increase in discounted payback period, and in the worst case, the payback period is 3.09 years, and in the best case, it is 1.6 years. Also, the construction of the Archimedean screw turbine in Iran can save currency for $1439.5.

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Experimental study on the performance of an oscillating water column by considering the interaction effects of optimal installation depth and dimensionless hydrodynamic coefficients for the Caspian Sea waves characteristics

Cited by 10 publications

References 17 publications

An Experimental Study to Apply an Absorption Refrigeration Cycle as a Dehumidifier in Humidification-Dehumidification Solar Desalination System

An Experimental Study to Apply an Absorption Refrigeration Cycle as a Dehumidifier in Humidification-Dehumidification Solar Desalination System

Enhancing Performance Evaluation of Archimedes Screw Turbines under Optimal Conditions: A Focus on Flow Rate Analysis, Empirical Equations, and Comparative Scaling Methods

Experimental Investigation on the Effect of Flow Rate and Load on the Hydrodynamic Behavior and Performance of an Archimedes Screw Turbine

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