Solar Heat Transfer formulation for the Steam generation from seawater based on Linear Fresnel Concentrator

Mapping Intimacies ◽

10.31219/osf.io/frhy3 ◽

2021 ◽

Author(s):

samir touzani

Keyword(s):

Heat Transfer ◽

Steam Generator ◽

Sea Water ◽

Water Desalination ◽

Thin Layers ◽

Steam Flow ◽

Steam Generation ◽

Detail Design ◽

Flow Generation ◽

Successive Heating

The purpose of this paper is to formulate the heat transfer needed to generate continuously the steam from the “Linear Fresnel concentrator Steam Generator” according to its dimensions. For more detail information refer to the article "Desalination of seawater by successive heating of thin layers of water using solar radiations from a Fresnel concentrator"[1], the preprint "Detail Design - Linear Fresnel concentrator Steam Generator"[2] and the preprint Steam Flow formulation of the Linear Fresnel concentrator Steam Generator[3]. The heat transfer flow assessment depending of many dimensions is the key point out put of this paper. At the glance, these dimensions are the geometry of the Linear Fresnel Concentrator, the tilt to the sun's rays, the length , the radius of the tangled cylinders, the thickness of the annulus spaces and the cavity between the composed device absorber and mirror. The device absorber is composed of the tangled cylinders and the steam collector. Note that the known LFR applications for both industrial and power sectors requires medium temperatures ranging from 100°C to 250°C. The flat plate solar collectors are suitable for low temperature applications maximum up to 80°C and parabolic concentrators are suitable for high temperatures applications above 300°C. Hence, the present work will focus on LFR with parabolic concentrator because sea water desalination requires reaching the boiling point under pressure near atmospheric pressure which is 100 °C. Furthermore, the diameter of absorber device for parabolic concentrator may vary from 5 in to 10 in which is much greater than tubes dimensions for trapezoidal cavity. Then, this dimension fact allows efficient flow water circulation and meaningful steam flow generation.[1] touzani, s. (2019, March 28). Desalination of seawater by successive heating of thin layers of water using solar radiations from a Fresnel concentrator. https://doi.org/10.31219/osf.io/dvr9y[2] touzani, s. (2020, September 12). Detail Design - Linear Fresnel concentrator Steam Generator. https://doi.org/10.31219/osf.io/wuq92[3] touzani, s. (2020, September 21). Steam Flow formulation of the Linear Fresnel concentrator Steam Generator. https://doi.org/10.31219/osf.io/ske5c

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Steam Flow formulation of the Linear Fresnel concentrator Steam Generator

10.31219/osf.io/ske5c ◽

2020 ◽

Author(s):

samir touzani

Keyword(s):

Steam Generator ◽

Sea Water ◽

Water Desalination ◽

Thin Layers ◽

Steam Flow ◽

Detail Design ◽

The Impact ◽

Successive Heating

The purpose of this paper is to formulate the steam flow that will be generated by the “Linear Fresnel concentrator Steam Generator” according to its dimensions. For mor detail information refer to the article "Desalination of seawater by successive heating of thin layers of water using solar radiations from a Fresnel concentrator"[https://doi.org/10.31219/osf.io/dvr9y] and the preprint "Detail Design - Linear Fresnel concentrator Steam Generator"[https://doi.org/10.31219/osf.io/wuq92] . The steam Flow is the key point out put of this paper. It will allow to figure out the impact of the sea water desalination engine, its cost and its benefits.

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Energy Production and vapor condensating in Desalination of seawater by successive heating of thin layers of water using solar radiations from a Fresnel concentrator"

10.31219/osf.io/muz9g ◽

2021 ◽

Author(s):

samir touzani

Keyword(s):

Steam Generator ◽

Electrical Energy ◽

Membrane System ◽

Thin Layers ◽

Condensation Process ◽

Steam Generation ◽

Detail Design ◽

Solar Desalination ◽

Additional Process ◽

Successive Heating

This paper aims to present the outline of two additional process for "Desalination of seawater by successive heating of thin layers of water using solar radiations from a Fresnel concentrator"[1]. For more detail information refer to the article "Desalination of seawater by successive heating of thin layers of water using solar radiations from a Fresnel concentrator"[1], the preprint "Detail Design - Linear Fresnel concentrator Steam Generator"[2] , the preprint Steam Flow formulation of the Linear Fresnel concentrator Steam Generator[3] and the preprint ‘Solar Heat Transfer formulation for the Steam generation from seawater based on Linear Fresnel Concentrator’[4].The first process is the condensation process which reuse an existing process. We recommend to use the HeatSink technology combined to cooling plate. For more information about this condensation process we can refer to this article ‘Improvement of condensation step of water vapor in solar desalination of seawater and the development of three-ply membrane system’[5]. The second process, which the innovation aspect for this paper, is to generate hydro-electrical energy from the condensate water in the first process.

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Detail Design - Linear Fresnel concentrator Steam Generator

10.31219/osf.io/wuq92 ◽

2020 ◽

Author(s):

samir touzani

Keyword(s):

Steam Generator ◽

Sea Water ◽

Water Desalination ◽

Detail Design

Complete Linear Fresnel concentrator Steam Generator schema . This paper describes in detail the steam gneration process to achieve the new sea water desalination process described in the paper available by this link https://osf.io/dvr9y/

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Optimizing an Active Solar still for Sea Water Desalination

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1051.985 ◽

2014 ◽

Vol 1051 ◽

pp. 985-991

Author(s):

Osman Ali Hamadou ◽

Khamlichi Abdellatif

Keyword(s):

Heat Transfer ◽

Solar Radiation ◽

Sea Water ◽

Saline Water ◽

Phase Changes ◽

Water Desalination ◽

Heat Transfer Fluid ◽

Water Yield ◽

Inlet Temperature ◽

Glass Cover

Sea water desalination through solar radiation distillation process can achieve low cost and sustainable fresh water for remote dry areas. In conventional passive solar stills, the solar radiation passes through the transparent cover and supplies heat to sea water with limited back reflection. The evaporative heat transfer between the water surface and the glass cover produces the distillate by means of film type condensation at the inner surface of the glass cover. In order to enhance evaporation/condensation phase changes, active solar stills were introduced. In these last, saline water is circulated and put in contact with a heat source which supplies heat to the saline water. With this extra energy, the distillate productivity is increased. In this work, heat supply is assumed to be controlled such that the temperature at the inlet of the still can be adjusted through regulation of the circulating heat transfer fluid rate. Using a modelling based on uniform temperature in each still component, a set of ordinary differential equations was derived. The input variables comprised heat transfer fluid rate, inlet temperature as well as sea water rate and basin depth. Extensive parametric studies were performed after that and optimization of the distilled water yield and rate was discussed.

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Desalination of seawater by successive heating of thin layers of water using solar radiations from a Fresnel concentrator

10.31219/osf.io/dvr9y ◽

2019 ◽

Author(s):

samir touzani

Keyword(s):

Sea Water ◽

Thin Layers ◽

Equivalent Resistance ◽

Initial Value ◽

Cold Source ◽

The Subject ◽

The Difference ◽

A New Technique ◽

Development Prospects ◽

Successive Heating

The seawater desalination technique presented in this article is based on a new technique for the production of water vapor which has the advantage of using solar energy with maximum evaporation efficiency. This innovation is limited to the production of steam and can be combined with a known technique of condensation of the steam in order to complete the desalination cycle of seawater. This technique is based on the simple principle that the heat transferred from the hot source to the cold source is maximum if the difference between their respective temperatures is kept at its maximum. Thus, by carrying out successive operations of heating thin layers of water, the technique makes it possible to maximize the efficiency of the evaporation by bringing the temperature of the fluid to its initial value at each iteration, thus enabling, according to the Newton's law, to favor the transfer of heat to water.Then, in this paper, we present the theoretical demonstration of the soundness of this technique by using the analogy with electricity using the equivalent resistance for circuits in parallel. Next, an application of the technique which is the subject of a patent of invention is presented in the detal. It is a desalination engine for seawater using solar radiation from a Fresnel concentrator. The presented invention makes it possible to produce steam continuously by heating thin layers of sea water by the Fresnel concentrator. The development prospects of the invention are also presented using the techniques of Nanotechnology.

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