Numerical investigation of the nanofluid effects on the heat extraction process of solar ponds in the transient step

Aramesh, Mohamad; Pourfayaz, Fathollah; Kasaeian, Alibakhsh

doi:10.1016/j.solener.2017.09.011

Cited by 58 publications

(12 citation statements)

References 40 publications

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“…The properties of nanofluids are highly dependent on the type of solid phase, synthesis procedure, temperature and other factors [33][34][35]. Nanofluids are broadly utilized in various renewable energy systems such as PV/T, solar collectors and solar ponds [36][37]. The results of studies have revealed that applying nanofluids in the mentioned renewable energy systems results in improved performance and efficiency.…”

Section: Introductionmentioning

confidence: 99%

Applications of nanofluids in geothermal: A review

Ahmadi¹,

Ramezanizadeh²,

Nazari³

et al. 2018

MMEP

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Geothermal energy is one of the most suitable sources of energy since it is possible to use it continuously for generating power and providing heat. Firstly, recent trends in geothermal energy are discussed and compared with other types of renewable energies. According to the results of this section, geothermal energy is an attractive choice for future power generation due to its low carbon dioxide emission and levelzied cost of electricity in comparison with other renewable energy sources. Afterwards, applications of nanofluid in geothermal-based energy systems are reviewed and their important results are represented. On the basis of literature review, using nanofluids can result in augment in geothermal systems. The enhancement is dependent on several factors including the type of nanofluid, concentration and system specification. According to the results of a study, the effect of using nanofluid on heat transfer rate became more significant at higher flow rates. In addition, using nanofluids can reduce the size of heat exchangers used in geothermal-based system. The main effects of employing nanofluids is increase in convective heat transfer and pressure loss.

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Section: Introductionmentioning

confidence: 99%

Applications of nanofluids in geothermal: A review

Ahmadi¹,

Ramezanizadeh²,

Nazari³

et al. 2018

MMEP

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“…The increasing difference between the temperature profiles of the pond is clearer in this figure. It must be noted that the maximum achievable temperature of the LCZ layer in the solar ponds is about 115°C, dependent on the fluid composition . The higher temperatures may cause boiling of the working fluid and in that case the concentration gradient of the pond will be destroyed and the pond cannot operate any more.…”

Section: Resultsmentioning

confidence: 99%

A Detailed Investigation of the Walls Shading Effect on the Performance of Solar Ponds

Aramesh

Kasaeian

Pourfayaz

et al. 2018

Env Prog and Sustain Energy

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In this article, a general modification on the existing heat storage modeling methods of solar ponds is presented. For this purpose, the walls shading effects have been thoroughly investigated. Four common structural types of the solar pond are studied and proper relations have been derived for them. Considering all the effective parameters on the walls shading status, precise relations for calculation of the sunny area at any desired time and location were presented. To compare different configurations, all the four types are studied in two design sets; ponds with the same top surface area of 12.56 m2, and ponds with the same total volume of 18 m3. It was indicated that the derived formulas can reduce the pond temperature calculation uncertainty from 8% (in the case of neglecting the shading effects) to less than 3%. Also, it was concluded that in the same total volume, the ponds with sloped walls show a better thermal performance. © 2018 American Institute of Chemical Engineers Environ Prog, 38:e13014, 2019

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“…The equations used for the calculation of the nanofluids thermal conductivity have been described in detail in our previous work. 41 For each type of the nanofluids, special empirical relations have been derived in the previous researches. Aramesh et al.…”

Section: Solar Absorption Refrigeration Systemmentioning

confidence: 99%

“…Aramesh et al. 41 have collected the relations for some of the nanofluids, including the ones studied in this research. In some of the relations, the parameter values in the standard condition are required.…”

Section: Solar Absorption Refrigeration Systemmentioning

confidence: 99%

Investigating the effect of using nanofluids on the performance of a double-effect absorption refrigeration cycle combined with a solar collector

Aramesh

Pourfayaz

Haghir

et al. 2019

Proceedings of the Institution of Mechanical Engineers, Part A:

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In this article, the performance of a double-effect LiBr-H2O absorption refrigeration cycle is studied and is improved by applying solar energy and utilizing nanofluids. A trough collector is used to preheat the working fluid before entering the generator of the cycle. In addition, four different nanofluids are considered as the heat transfer fluid of the collector: Al2O3, Ag, Cu, and CuO. The effects of using nanofluids on the outlet temperature of the heat transfer fluid, the temperature of the working fluid entering the generator, the heat produced by the generator, and COP of the cycle are studied. Different concentrations of the nanoparticles from 0 to 2.5% are considered for the nanofluids. The results indicate that in all the concentrations, Ag nanoparticles will have a better performance comparing to the other types. Furthermore, it was concluded that the higher concentrations of the nanoparticles and along with it the higher inlet temperature of the generator will decrease the generator heat production rate up to 4%. Moreover, considering the constant cooling capacity of the cycle, usage of the Ag nanoparticles in the concentration of 2.5% increases the value of COP up to 3.9%, with respect to the pure water.

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Numerical investigation of the nanofluid effects on the heat extraction process of solar ponds in the transient step

Cited by 58 publications

References 40 publications

Applications of nanofluids in geothermal: A review

Applications of nanofluids in geothermal: A review

A Detailed Investigation of the Walls Shading Effect on the Performance of Solar Ponds

Investigating the effect of using nanofluids on the performance of a double-effect absorption refrigeration cycle combined with a solar collector

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