Semi-empirical characterization of a greenhouse-effect cascades solar distiller

Khelif, Cherif; Touati, B.

doi:10.1016/s0960-1481(99)00023-3

Cited by 8 publications

(4 citation statements)

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“…In previous studies, 1–17 the influence of connecting the PV/T collector to the stepped solar still has not been investigated, while connecting the PV/T collector to stepped solar still that has been investigated in this study could have some advantages as follows: The PV/T collector provides the electrical power needed to pump saline water in the stepped solar still. The PV/T collector by preheating the water at the entrance to the stepped solar still would lead to the increase of the saline water temperature and improve the fresh water production efficiency. The PV/T collector provides additional electrical power for other uses. There is improvement in the electrical performance of photovoltaic cells in the PV/T collector due cooling by saline water. …”

Section: Introductionmentioning

confidence: 99%

“…Khelif and Touati 7 carried out a theoretical and experimental study on the performance of a stepped solar still. They introduced three main parameters, namely optical efficiency, global losses factor, and time constant as the characterizations of solar still, and finally provided solutions to improve the performance of solar still by these three parameters.…”

Section: Introductionmentioning

confidence: 99%

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Experimental performance assessment of a photovoltaic/thermal stepped solar still

Sarhaddi

2018

Energy & Environment

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In this paper, the performance analysis of a stepped solar still connected to photovoltaic thermal collector is carried out numerically and experimentally. A transient thermal model is obtained by writing energy balance for the various components of solar still system (i.e. glass cover, saline water, absorber plate, photovoltaic thermal collector). Also, an expression for the energy efficiency of system is derived. An experimental setup is designed and fabricated. The simulation results are validated by the measured experimental data. Finally, parametric studies are carried out and the effect of various operating and design parameters on the energy efficiency, freshwater productivity, and output electrical power is investigated. It is observed that there is a desired value for the mass flow rate of saline water and the area of photovoltaic thermal collector, which maximizes the energy efficiency. The desired value of the mass flow rate and photovoltaic thermal collector area is 0.068 kg/min and 1.33 m2, respectively. Furthermore, the connection of photovoltaic thermal collector to the stepped solar still improves the freshwater productivity and energy efficiency and it provides additional electrical power for other applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental performance assessment of a photovoltaic/thermal stepped solar still

Sarhaddi

2018

Energy & Environment

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“…Efforts for performance rising of stepped SSs have continued into the 21st century. 24,25 For example, Khelif and Touati 26 suggested techniques to improve their efficiency by modifying three key factors: optical efficiency, time constant, and global losses factor 27,28 increased the pure water daily production by 75% over a regular stepped SS and 125% over a basin SS, by adding interior and exterior reflectors to the flow channel. Using latent heat storage to control the temperature and humidity of a residential building using a stepped SS, Radhwan 29 designed an agriculture greenhouse SS for heating and humidification to enhance the nighttime temperature and provided a pure water efficiency with a daily yield of 57%, and 4.6 L/m 2 , respectively.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of a stepped solar still employing a phase change material, a conical tank, and a solar dish

Dawood

Shehata

et al. 2022

Intl J of Energy Research

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The configuration of an external solar dish improves the performance of stepped slope solar still (SS) in an experimental setting. The use of an external solar dish raises the effects of the water basin, resulting in a higher rate of evaporation. The stepped still was designed, built, and tested in Ismailia, Egypt, using local weather conditions. The proposed SS had a 1 m 2 base area and eight steps, a solar dish with a concentration ratio of 80, a cone tank, two centrifugal pumps, four photovoltaic modules totaling 1000 W, a control unit, and solenoid valves. The impact of utilizing the storage material during the phases was investigated. A nozzle was installed at the top of the cone tank. Four mass flow rates of circulated water were examined 250, 350, 450, and 550 mL/min. The control unit receives inputs from the photovoltaic output, photodiodes, and water temperature inside the cone. The control unit outputs the signal for the two solar dish motors, centrifugal pumps, and solenoid valves. First, a standard stepped SS, second, a stepped SS using phase change material (PCM), and finally, a stepped SS using PCM combined with a solar dish were investigated. The conventional stepped SSs with PCM had an optimal mass flow rate of 250 mL/min, whereas the stepped SS integrated with the solar dish had 550 mL/min of mass flow rate (an optimum value). The highest daily freshwater productivity was 7.63, 9.18, 11.23, and 13.9 kg/d for water spraying mass flow rates of 250, 350, 450, and 550 mL/min, respectively, with 0.0161 $/L/m 2 of a maximum projected cost, according to data from an integrated stepped SS.

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“…In recent years, numerous studies have been conducted on the performance analysis of stepped solar stills. The beginning of research on stepped solar stills is attributed to Khelif and Touati [8] carried out a theoretical and experimental study on the performance of a stepped solar still. They introduced three main parameters, namely optical efficiency, global losses factor, and time constant as the characterizations of solar still, and finally provided solutions to improve the performance of solar still by these three parameters.…”

Section: Introductionmentioning

confidence: 99%

Comparative Experimental Study Between Conventional Stepped Solar Still and an Active Stepped Solar Still Incorporated with a Water Circulation System

Kabeel

Mohamad

Majeed

2019

Journal of Engineering Research

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Semi-empirical characterization of a greenhouse-effect cascades solar distiller

Cited by 8 publications

References 0 publications

Experimental performance assessment of a photovoltaic/thermal stepped solar still

Experimental performance assessment of a photovoltaic/thermal stepped solar still

Experimental investigation of a stepped solar still employing a phase change material, a conical tank, and a solar dish

Comparative Experimental Study Between Conventional Stepped Solar Still and an Active Stepped Solar Still Incorporated with a Water Circulation System

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