Thermal-Hydraulic Analysis of Parabolic Trough Collectors Using Straight Conical Strip Inserts with Nanofluids

Abed, Nabeel; Afgan, Imran; Iacovides, Hector; Cioncolini, Andrea; Khurshid, Ilyas; Nasser, Adel

doi:10.3390/nano11040853

Cited by 35 publications

(7 citation statements)

References 70 publications

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“…Among the passive technologies, artificial roughness is the current choice of researchers. Many researchers 16–41,43–45,47–62 have worked on it and suggested that artificial roughness inside the receiver surface effectively enhances the thermal characteristics of a receiver as compared to a smooth surface.…”

Section: Discussionmentioning

confidence: 99%

“…For providing artificial roughness in the receiver many researchers have used different types of geometrical modification 53,60 and geometrical inserts. Different types of inserts are used in SPT receiver includes helical screws, 30,31 pin fin arrays, 21 ribs, 19 twisted tapes, 25–29,32,54 perforated plates, 24,57 porous discs 56,59,61 and conical strips 33–41,43,44,48,49,52 for augmentation of heat transfer. Also, the small changes in the geometry of conventional helical twisted tapes like square-cut, v cut, winglets, and perforation improve the thermal performance of SPT collectors.…”

Section: Discussionmentioning

confidence: 99%

“…Thus use of conical strips for the heat transfer enhancement in combination with some special feature may be a new area for research. Based on literature it is evident that the main factors which affect the performance of conical inserts as studied by many researchers 33–41,43,44,48,49,52 are as follows:Pitch to pipe diameter ratio : P* …”

Section: Discussionmentioning

confidence: 99%

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A review study on the performance enhancement of solar parabolic trough receiver by various passive techniques

Singh

Samir²,

Kumar

2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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This is a new era where the world’s energy consumption is so high and is likely to increase over 60% of current consumption by the year 2030. Therefore, renewable energy should be used most frequently. The most preferred alternative to fossil fuels is solar energy but converting solar energy into usable form is the most challenging part. The conversion to thermal energy is the one option. In the area of solar thermal power generation, a solar parabolic trough (SPT) collector is an effective method. Also, the use of passive methods to enhance the thermal performance of these parabolic trough receivers is currently the researcher’s interest This review study is focused on different types of geometrical modification (Artificial roughness) used to enhance the thermal performance of SPT receivers. Based on the extensive study it has been found that conical strip insert is a very broad field for research as it can enhance the thermal performance up to 5–10 times. Also there are parameters associated with the conical strips like shape, pitch, angle of twist, slant angle, geometry angle, etc. which can contribute to better performance when used in SPT receiver.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

A review study on the performance enhancement of solar parabolic trough receiver by various passive techniques

Singh

Samir²,

Kumar

2022

Proceedings of the Institution of Mechanical Engineers, Part E:

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“…Since the primary goals in industrial applications are to reduce the processing time, increase the lifetime of the equipment, and decrease the amount of energy consumption, using PTSC systems, these goals can be fulfilled through improving the rate of heat transfer between the absorber tube and the working fluid. One way of achieving this is by utilizing nanofluids as the heat transfer fluid in the PTSC system [ 299 , 300 ]. This is because, as mentioned earlier, nanofluids have higher thermal conductivity than any known conventional heat transfer fluid, which makes them potential candidates for the future of such heat transfer applications.…”

Section: Thermal Applicationsmentioning

confidence: 99%

Carbon-Based Nanofluids and Their Advances towards Heat Transfer Applications—A Review

et al. 2021

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Nanofluids have opened the doors towards the enhancement of many of today’s existing thermal applications performance. This is because these advanced working fluids exhibit exceptional thermophysical properties, and thus making them excellent candidates for replacing conventional working fluids. On the other hand, nanomaterials of carbon-base were proven throughout the literature to have the highest thermal conductivity among all other types of nanoscaled materials. Therefore, when these materials are homogeneously dispersed in a base fluid, the resulting suspension will theoretically attain orders of magnitude higher effective thermal conductivity than its counterpart. Despite this fact, there are still some challenges that are associated with these types of fluids. The main obstacle is the dispersion stability of the nanomaterials, which can lead the attractive properties of the nanofluid to degrade with time, up to the point where they lose their effectiveness. For such reason, this work has been devoted towards providing a systematic review on nanofluids of carbon-base, precisely; carbon nanotubes, graphene, and nanodiamonds, and their employment in thermal systems commonly used in the energy sectors. Firstly, this work reviews the synthesis approaches of the carbon-based feedstock. Then, it explains the different nanofluids fabrication methods. The dispersion stability is also discussed in terms of measuring techniques, enhancement methods, and its effect on the suspension thermophysical properties. The study summarizes the development in the correlations used to predict the thermophysical properties of the dispersion. Furthermore, it assesses the influence of these advanced working fluids on parabolic trough solar collectors, nuclear reactor systems, and air conditioning and refrigeration systems. Lastly, the current gap in scientific knowledge is provided to set up future research directions.

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“…Where W P [11,55] denotes extra power required by pump due to pressure drop and h p stands for isentropic efficiency of pump which is assumed as about 80%. The velocity of fluid flow is a function of mass flow rate and can be evaluated as follows:…”

mentioning

confidence: 99%

Parabolic trough solar collector: A review on geometrical interpretation, mathematical model, and thermal performance augmentation

SINGH

CHANDRA²

2023

Eng. Res. Express

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In recent decades, solar energy has emerged as the most promising renewable energy source and the best alternative to conventional energy due to its abundant availability, free, clean, no atmospheric hazards, eco-friendly, sustainable nature, and other factors. Because of its wide temperature range (up to 400 ℃), the parabolic trough solar collector is the most commonly used in concentrated solar power technology. A parabolic trough solar collector can be divided into two types based on its applications: low to medium temperature and medium to high temperature. The first category is widely utilized in household hot water, water purification, industrial process heating, desalination, and food processing, among other uses. Another is used in the electricity production process. The present review paper focuses on various aspects of parabolic trough solar collector, such as general description, geometrical interpretation, and mathematical models dealing with geometrical parameters and various types of performance calculations, trough modeling using a computational fluid dynamics tool, solar simulator, thermal resistance model, and losses. Furthermore, highlights on recent advances in thermal performance enhancement by various techniques, mainly by using modified working fluid (nanofluid), turbulators, and the modified surface of absorber tube, are presented in literature form and summarized in the table. This review paper will be of great help to researchers who have a keen interest in parabolic trough solar collector-based systems.

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Thermal-Hydraulic Analysis of Parabolic Trough Collectors Using Straight Conical Strip Inserts with Nanofluids

Cited by 35 publications

References 70 publications

A review study on the performance enhancement of solar parabolic trough receiver by various passive techniques

A review study on the performance enhancement of solar parabolic trough receiver by various passive techniques

Carbon-Based Nanofluids and Their Advances towards Heat Transfer Applications—A Review

Parabolic trough solar collector: A review on geometrical interpretation, mathematical model, and thermal performance augmentation

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