New theoretical modelling of heat transfer in solar ponds

Sayer, Asaad H.; Al-Hussaini, Hazim

doi:10.1016/j.solener.2015.12.015

Cited by 61 publications

(41 citation statements)

References 25 publications

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“…The mathematical model for the SGSP is based on the theoretical modelling of Sayer et al [9], with some improvement from Husain et al [10], Abbassi Monjezi and Campbell [11]. The modelling for the ORC is based on a previous article of the Authors [12].…”

Section: System and Mathematical Modelsmentioning

confidence: 99%

“…The pond is supposed unburied and well insulated laterally, so each heat transfer to the wall may be neglected (Qwu = 0) [9]. This is also assumed for the NCZ and the LCZ layers (Qwl = Qwn = 0) [9].…”

Section: S436mentioning

confidence: 99%

“…The convective heat transfer coefficient from the pond surface to the air is calculated with the McAdams formula [9], based on the average wind speed, v:…”

Section: The Other Terms Of the Energy Balancementioning

confidence: 99%

“…Considering the emissivity of the water, , assumed equal to 0.83 [9], Stefan-Boltzmann's constant,  = 5.67 ×10…”

Section: The Other Terms Of the Energy Balancementioning

confidence: 99%

See 3 more Smart Citations

A solar pond for feeding a thermoelectric generator or an organic Rankine cycle system

Rocca

Scaccianoce

Peri

et al. 2017

IJHT

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The world energy demand is continuously growing, which means an increase in consumption for all modern fuels or stronger effort on the development and improvement of renewable technologies. Moreover, Developing Countries claims more energy and they have often wide unutilized or unusable lands. The solar energy represents a useful opportunity for these Countries. The Solar Pond is both a solar collector and a thermal storage for long period and is suitable to use in wide sunny areas. Solar pond technology is able to supply heat for several applications requiring low-grade thermal energy or for electrical power production. In order to produce electrical energy from solar ponds it is necessary to use systems fed by low enthalpy sources, such Thermoelectric Generator (TEG) and Organic Rankine Cycle (ORC). In this paper, a model of a Solar Pond for power generation is analyzed in conjunction with an Organic Rankine Cycle. The model has been validated using climate data of an area near to Palermo city (Italy) and exactly the Test Reference Year developed by the Authors.

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Section: System and Mathematical Modelsmentioning

confidence: 99%

Section: S436mentioning

confidence: 99%

“…The convective heat transfer coefficient from the pond surface to the air is calculated with the McAdams formula [9], based on the average wind speed, v:…”

Section: The Other Terms Of the Energy Balancementioning

confidence: 99%

“…Considering the emissivity of the water, , assumed equal to 0.83 [9], Stefan-Boltzmann's constant,  = 5.67 ×10…”

Section: The Other Terms Of the Energy Balancementioning

confidence: 99%

See 2 more Smart Citations

A solar pond for feeding a thermoelectric generator or an organic Rankine cycle system

Rocca

Scaccianoce

Peri

et al. 2017

IJHT

View full text Add to dashboard Cite

show abstract

“…Some of these studies concentrated on functioning and mechanism of solar pond but some others only the cases insulated or uninsulated conditions, some of them related with or without cover, some others investigated above ground and subsoil conditions of solar pond. To evaluate thermal efficiency of solar pond several model were developed based on conservation principle of thermodynamic [15][16][17][18]. With the help of the different models, the temperature distribution in the solar pond, the heat losses from the side wall, floor and the surface can be calculated to be compatible with the experimental data.…”

Section: Introductionmentioning

confidence: 99%

Seasonal temperature variation of solar pond under Mediterranean condition

Soğukpınar

2019

THERM SCI

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In this paper, thermal performance of solar pond for different condition was numerically investigated by using discrete ordinates method to facilitate a greater understanding of the effects of relative various condition on thermal performance improvement of solar pond. For this, a 3-D prototypes of solar ponds with square cross-sections were simulated for the oversoil and subsoil, insulated and uninsulated, open on and off conditions. The direction of sunlight (zenith angle and the solar elevation) was automatically computed from the latitude, longitude, time zone, date, and time. The estimated solar position is accurate for a date between year 2000 and 2199, due to an approximation used in the Julian Day calendar calculation. Seasonal temperature variation of solar pond was calculated for the full period of one year starting from March and calculated data were compared with experiment to validate simulation accuracy of heat transfer model. Result indicates that temperatures in the summer time were calculated at around 55 °C, while temperatures in the winter were in the range of 20 to 30 °C and temperature changes between 30 °C and 40 °C in spring and autumn.

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Experiment study of the effect of salt on the stability of solar ponds

Ines

Jomâa

2018

Env Prog and Sustain Energy

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The sun is the largest source of renewable energy and this energy is abundantly available in all part of the earth. One way to trap solar energy is through the use of salt‐gradient solar ponds (SGSP). Collecting and storing of energy for this device is in one system, so the heat in summer can be utilized in winter. A typical SGSP consists of a pond containing three density stratified layers. The stability duration and the efficiency of a SGSP depend closely on the self‐maintenance of the NCZ layer, which itself depends on the type of the used salt. This article reviews nonconvective solar ponds, the problems encountered in their operations and the effect of the used salts. Three salts: NaCl, MgCl, and CaCl2 were tested in a laboratory set‐up under different operating conditions. Temperature and concentration gradients were developed by heating the pond from the bottom. The results showed that MgCl and CaCl2 stratification remains stable until the temperature reaches around 70 °C while NaCl layers were mixed at 55 °C. © 2018 American Institute of Chemical Engineers Environ Prog, 38: 699–705, 2019

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New theoretical modelling of heat transfer in solar ponds

Cited by 61 publications

References 25 publications

A solar pond for feeding a thermoelectric generator or an organic Rankine cycle system

A solar pond for feeding a thermoelectric generator or an organic Rankine cycle system

Seasonal temperature variation of solar pond under Mediterranean condition

Experiment study of the effect of salt on the stability of solar ponds

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