Measurement of the Efficiency of Evacuated Tube Solar Collectors Under Various Operating Conditions

Zubriski, S. E.; Dick, Kris J.

doi:10.3992/jgb.7.3.114

Cited by 20 publications

(9 citation statements)

References 12 publications

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“…The inner tube acts as the absorbing surface, while the outer tube acts as the transparent glass to facilitate the passage of solar radiation. The space between the two concentric tubes is vacuumed to create thermal insulation [30]. In contrast to FPSCs, ETSCs do not require sun trackers due to their cylindrical absorbing surface.…”

Section: Evacuated Tubesmentioning

confidence: 99%

A review of latest developments, progress, and applications of heat pipe solar collectors

Shafieian

Khiadani

Nosrati

2018

Renewable and Sustainable Energy Reviews

142

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Among all the available solutions to the current high energy demand and consequent economic and environmental problems, solar energy, without any doubt, is one of the most promising and widespread solutions. However, conventional solar systems face some intractable challenges affecting their technical performance and economic feasibility. To overcome these challenges, increasing attention has been drawn towards the utilization of heat pipes, as an efficient heat transfer technology, in conventional solar systems. To the authors' knowledge, despite many valuable studies on heat pipe solar collectors (mainly during the last decade), a comprehensive review which surveys and summarizes those studies and identifies the research gaps in this field has not been published to date. This review paper provides an overview of the recent studies on heat pipe solar collectors (HPSCs), their utilization in different domestic, industrial, and innovative applications, challenges, and future research potentials. The concept and principles of HPSCs are first introduced and a review of the previous studies to improve both energy efficiency and cost effectiveness of these collectors is presented. Moreover, a concise section is dedicated to mathematical modeling to demonstrate suitable methods for simulating the performance of HPSCs. Also, the latest applications of HPSCs in water heating, desalination, space heating, and electricity generation systems are reviewed, and finally, some recommendations for future research directions, regarding both development and new applications, are made.

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Section: Evacuated Tubesmentioning

confidence: 99%

A review of latest developments, progress, and applications of heat pipe solar collectors

Shafieian

Khiadani

Nosrati

2018

Renewable and Sustainable Energy Reviews

142

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“…Numerous authors [3,11,12] have noted that ETSCs have much greater efficiencies than the common FPC, especially at low temperature and isolation. Numerous authors [3,11,12] have noted that ETSCs have much greater efficiencies than the common FPC, especially at low temperature and isolation.…”

Section: Evacuated Tube Solar Collector (Etsc)mentioning

confidence: 99%

“…According to many researchers [3,11,12] ETSCs have much more higher efficiencies than FPCs. ETSCs can collect both direct and diffuse radiations.…”

Section: Why An Evacuated Tube Solar Collector (Etsc) Is Preferable?mentioning

confidence: 99%

Progress and latest developments of evacuated tube solar collectors

Sabiha

Saidur

Mekhilef

et al. 2015

Renewable and Sustainable Energy Reviews

319

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“…Another study looks into nanofluids made of artificial materials, and the results showed that its improved ETC performance [7]. Many authors have stated that the ETSCs increased the efficiencies compared with the frequent FPCs, especially at low temperatures and insulation [9]. An ETC made of equivalent evacuated glass tubes.…”

Section: Introductionmentioning

confidence: 99%

Thermal Performance of an Evacuated-Tube Solar Collector Using Nanofluids and an Electrical Curtain Controlled by an Artificial Intelligence Technique

Rashid¹,

Sultan²,

Anead³

2022

ETJ

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Increasing ETSC's efficiency by using Finned electronic curtain and Nano fluids .• Using of finned electronic curtain increased sun rays on the ETSC's that increases the system efficiency. • Efficiency improvement with TiO2 are 7.03%, 9.16%, and 11.89%, respectively. • using artificial intelligent (FLC-ANN) to predict the thermal parameters of ETSCs.This paper studies the improvement of an evacuated tube solar collectors(ETSCs) performance in two way. The first is by adding a finned electronic curtain in front of the solar collector. While the second is by using a nanofluid instead of pure water. The purpose of the curtain is to increase the amount of solar radiation reflected toward the collector. The curtain is distinguished by its self-ability to track the sun's rays automatically. The electronic curtain is also closed to shade the tubes depending on the movement of the electronic curtain's fins and the nanofluid's temperatures. MATLAB algorithm has been used to design the Simulink model and control the system using Fuzzy Logic Control (FLC) and Artificial Neural Network (ANN). The results showed that the system performance improved using TiO2(50nm)+PW) as a working fluid without the curtain are (3.906%,5.34%, and7.407%), while the rate of improvement in the case of distilled water only was 2.34%and3.81%. Finally, by adding the finned electronic curtain to the system and use of TiO2(50nm)+PW) as a working fluid, the efficiency increased by 7.03%,9.16%, and 11.89%. The results showed that the performance of evacuated tubes solar collectors increased by using a nanofluid and the finned electronic curtain.

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Measurement of the Efficiency of Evacuated Tube Solar Collectors Under Various Operating Conditions

Abstract: The operating efficiency of evacuated tubes themselves under varying environmental conditions and installation scenarios, independent of water and space heating auxiliary

Cited by 20 publications

References 12 publications

A review of latest developments, progress, and applications of heat pipe solar collectors

A review of latest developments, progress, and applications of heat pipe solar collectors

Progress and latest developments of evacuated tube solar collectors

Thermal Performance of an Evacuated-Tube Solar Collector Using Nanofluids and an Electrical Curtain Controlled by an Artificial Intelligence Technique

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