Main Reserves for Increasing the Efficiency of Solar Thermal Energy in Heat Supply Systems (Review)

Rashidov, Yu. K.; Rashidov, K. Yu.; Mukhin, I. I.; Sur’atov, Kh. T.; Orzimatov, J. T.; Karshiev, Sh. Sh.

doi:10.3103/s0003701x19020099

Cited by 27 publications

(13 citation statements)

References 18 publications

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“…The amount of sunlight available, the angle and orientation of the collector, the type of fluid utilized, and the temperature of the air or water heated, and the system's insulation all have an impact on how well a solar collector performs. By choosing the right collector design and size, maximizing the orientation and tilt of the collectors to maximize solar radiation, using premium building materials, and limiting heat losses through adequate insulation, enhancing the effectiveness of a solar collector system is attainable [23]. To guarantee optimum efficiency and the system's longevity, proper system maintenance, including routine collector cleaning of the panels to remove dust or debris is essential [24].…”

Section: Solar-collector-related Studiesmentioning

confidence: 99%

Recent Advances, Development, and Impact of Using Phase Change Materials as Thermal Energy Storage in Different Solar Energy Systems: A Review

Rashid

Al‐Obaidi

Dulaimi

et al. 2023

Designs

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The efficient utilization of solar energy technology is significantly enhanced by the application of energy storage, which plays an essential role. Nowadays, a wide variety of applications deal with energy storage. Due to the intermittent nature of solar radiation, phase change materials are excellent options for use in several types of solar energy systems. This overview of the relevant literature thoroughly discusses the applications of phase change materials, including solar collectors, solar stills, solar ponds, solar air heaters, and solar chimneys. Despite the complexity of their availability and high costs, phase change materials are utilized in the majority of solar energy techniques because of the considerable technical improvements they provide. While numerous studies have investigated the progress of phase change materials used in solar energy applications such as photovoltaic systems, it is vital to understand the conceptual knowledge of employing phase change materials in various types of solar thermal energy systems. Investigations into the use of phase change materials in solar applications for the purpose of storing thermal energy are still being carried out to upgrade the overall performance. This paper briefly reviews recently published studies between 2016 and 2023 that utilized phase change materials as thermal energy storage in different solar energy systems by collecting more than 74 examples from the open literature. This study focuses on demonstrating the maturity of phase change materials and their integration into solar energy applications. Based on the findings, proposals for new research projects are made.

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Section: Solar-collector-related Studiesmentioning

confidence: 99%

Recent Advances, Development, and Impact of Using Phase Change Materials as Thermal Energy Storage in Different Solar Energy Systems: A Review

Rashid

Al‐Obaidi

Dulaimi

et al. 2023

Designs

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“…In thе prеsеnсе оf thе аdditiоns 2-3 mg/dm 3 оf PHMG еquаl оr bеttеr quаlitу оf thе Sirdаrуа Rivеr wаtеr filtrаtе bу mоst indiсаtоrs wаs асhiеvеd аt lоwеr dоsеs (bу 10-20 mg/dm3) оf АS, whilе thоsе оf thе Nаrin Rivеr wаtеr-аt thе lоwеr (bу 20-40 mg/dm 3 ) dоsе оf АS аftеr аdditiоn оf 5 mg/dm 3 оf PHMG. Lоwеr dоsеs оf PHMG did nоt mаkе it pоssiblе tо rеtаin thе filtrаtе quаlitу аt thе lоwеr dоsеs оf thе соаgulаnt [11][12][13][14][15][16][17][18][19][20][21][22][23][24].…”

Section: Rеsults аNd Disсussiоnunclassified

Water purification and demineralization technology

Аbdullауеv,

Jurаеv,

Yоqubjаnоvа

et al. 2023

E3S Web of Conf.

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Thе pаpеr hаs invеstigаtеd flоссulаtiоn саpасitу оf pоlуhеxаmеthуlеnе guаnidinе hуdrосhlоridе during jоint trеаtmеnt with аluminum sulfаtе оf thе Nаrin аnd Sirdаrуа Rivеr wаtеr in thе spring pеriоd. It hаs bееn shоwn thаt аdditivеs 1–5 mg/dm3 оf thе mаttеr undеr studу during соаgulаtiоn trеаt-mеnt оf thе rivеr wаtеrs imprоvеs thе prосеss оf thеir сlаrifiсаtiоn, inсrеаsеs thе filtrаtе quаlitу in tеrms оf mаin indiсаtоrs аnd mаkеs it pоssiblе tо rеduсе bу 10–20 mg/dm3 thе dоsе оf thе соаgulаnt. А prоnоunсеd flоссulаtiоn еffесt mаnifеsts itsеlf whеn trеаting thе wаtеrs in quеstiоn bу thе dоsеs оf а pоlуmеr prеpаrаtiоn rеspесtivеlу 3–5 аnd 2–3 mg/dm3 . Pоlуhеxаmеthуlеnе guаnidinе (withоut а соаgulаnt) еnsurеs а stаndаrdizеd quаlitу оf thе filtrаtе in tеrms оf соlоr аnd turbiditу оnlу whеn trеаting wеаklу stаinеd wаtеr оf thе Sirdаrуа Rivеr. It hаs bееn fоund thаt ≥ 99% оf pоlуhеxаmеthуlеnе guаnidinе is rеtаinеd bу thе mеdium оf а sаnd filtеr.

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“…The choice of solver depends on the type of physics being modeled, the complexity of the problem, the desired accuracy, and the available computing resources. Standard COMSOL Multiphysics solvers were used for the standard SST [14][15][16][17][18][19][20][21][22][23] turbulence model [12][13]. The average wind speed in Tashkent is 15 m/s.…”

Section: Mathematical Statement Of the Problemmentioning

confidence: 99%

Aerodynamic study of the characteristics of the nest one skyscraper under wind load

Akhmedov,

Madaliev,

Yunusova

et al. 2023

E3S Web of Conf.

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To improve the safety and ease of use of super-tall buildings in strong winds, aerodynamic optimization of building shapes is considered the most effective approach. Aerodynamic optimization aims to solve a problem at its source, as opposed to structural optimization, which aims to improve the wind resistance of a structure. With the advancement of technology, buildings with complex plan shapes such as square and round, round and hexagonal, square and octagonal, etc. have been considered by many architects keeping in mind the aesthetics of the building. The wind flow around a high-rise building with complex plan shapes having different height ratios is different from what we get when analyzing a conventional shape. Since data on such buildings is not available, the need for wind tunnel or CFD testing becomes important to analyze the effects of wind on such buildings. CFD (computational fluid dynamics) for determining wind response is becoming extremely popular.

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Main Reserves for Increasing the Efficiency of Solar Thermal Energy in Heat Supply Systems (Review)

Cited by 27 publications

References 18 publications

Recent Advances, Development, and Impact of Using Phase Change Materials as Thermal Energy Storage in Different Solar Energy Systems: A Review

Recent Advances, Development, and Impact of Using Phase Change Materials as Thermal Energy Storage in Different Solar Energy Systems: A Review

Water purification and demineralization technology

Aerodynamic study of the characteristics of the nest one skyscraper under wind load

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