Experimental study on thermal performance of U-type evacuated glass tubular solar collector with low inlet temperature

Nie, Xianhua; Zhao, Li; Deng, Shuai; Lin, Xueyin

doi:10.1016/j.solener.2017.04.030

Cited by 35 publications

(4 citation statements)

References 18 publications

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“…This can be accomplished by employing a semi-empirical system efficiency model, performance testing, and rating, as well as developing a test system for the thermo-syphon system in the outdoors. In [11], five levels of sun irradiation and five levels of mass flow rate were used to test a solar collector with 16 U-type evacuated glass tubes. A solar simulator is used to calculate the performance of an evacuated solar receiver.…”

Section: Literature Reviewmentioning

confidence: 99%

An experimental study of solar receiver under cloudy weather conditions

Havaldar

Kulkarni

Dhokane

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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The performance of the central solar receiver should be properly examined for an effective design of a solar power or solar heating system. The performance of solar receiver is affected by three parameters. These are the amount of solar radiations, the state of the heating medium and the temperature of the surrounding air. Also, while evaluating the performance of a solar receiver, the ambient weather conditions should be taken into account. As a result, when a large amount of direct light strikes a solar receiver, the power generated increases as well. In contrast, as the amount of direct light falling on the solar receiver diminishes, so does the amount of electricity generated. As a result, it is generally understood that on sunny days, the performance of the central solar receiver will be higher, while on overcast days, the performance will be reduced. The solar receiver collects heat from diffused or reflecting light (when the sun is obscured by clouds) and absorbs reflective light from glossy or light-colored surfaces. The experimental results reveal that solar radiation collection performance is dependent on climatic circumstances; thus, when installing a solar receiver, it should be suitable for the specific region depending on weather conditions.

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Section: Literature Reviewmentioning

confidence: 99%

An experimental study of solar receiver under cloudy weather conditions

Havaldar

Kulkarni

Dhokane

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…Evacuated tube collector is preferably used for high temperature applications such as desalination of sea water, air conditioning, refrigeration, and industrial heating processes since their performance is better than that of Flat Plate Collectors [16]. Xianhua et al [17] stated that, higher thermal efficiencies can be achieved for the evacuated tube solar collectors by the reducing the inlet fluid temperature. For temperatures below zero, the thermal efficiencies increase as the reduced temperature decreases, and the growth rate of the thermal efficiency will decreases slowly.…”

Section: Bii Heat Pipe Evacuated Tube Collectormentioning

confidence: 99%

Performance Analysis of Flat Plate and Evacuated Tube Collectors

Anchala*,

Venkatachalam,

Bekele

et al. 2020

IJRTE

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This study gives a thermal analysis on the effect of operating parameters on the performance of solar water heating systems with two distinct collector configurations; flat plate and heat pipe evacuated tube collectors. The thermal analysis of these two systems was conducted based on the account of variation in weather conditions of Adama and volume flow rate, using T*SOL® Simulation software, to study the impact of these operating conditions on the system efficiency, system solar fraction, storage tank outlet temperature, collector outlet temperature, energy accumulated and collected in the tank and collector. This is done to compare the performance of these two systems with each other, based on thermal analysis in order to provide the necessary information required to select the most appropriate solar collector and its operating conditions. The results showed that for a fluid circulating at 120 l/h, the highest monthly solar fraction of FPC and ETC systems were 80% and 64.6%, respectively, around November with a total solar irradiation of 191 kWh/month. For both systems, the hourly tank outlet temperature peaked in November to 87 °C and 71.2 °C for ETC and FPC, respectively. For a typical day in April, the maximum tank outlet temperature becomes 74 and 62.5 °C. Regarding the flow rate, simulation of the systems is done for three flow rates (80, 120 and 160 l/h). The results also showed that for a typical day in April, the hourly maximum tank inletoutlet temperature difference was obtained for both ETC and FPC at 12:00 PM at a flow rate of 160 l/h, where the corresponding maximum tank outlet temperature becomes 74 and 62.5 °C. At this volume flow rate, a solar water heating system efficiency of 59% and 50%, and also a system solar fraction of 82% and 68.1% could be achieved for a SWH system employing ETC and FPC, respectively. Overall, ETC systems proved to be a more efficient system to satisfy the need of hot water.

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“…Using evacuated tubes helps to maximize the temperature and improves the efficiency for longer duration. An evacuated tube collector system produces 25%-40% more efficiency as compared to flat plate collector and also due to its cylindrical shape it is able to absorb solar radiation from all directions [1] and its value can be depicted from Table1.Using an evacuated tube collector temperature of the hot water was around 71.66% efficient and efficiency was 60.11% with minimum relative error [2]. With increasing mass flow rate and solar radiation, the thermal efficiency of collector is higher at negative inlet temperature [3].…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis on Thermal Efficiency and Heat Loss of the Evacuated Tube Collector with Variable Solar Radition and Wind Speed

Kori,

Shakya,

Gupta

et al. 2023

IJRASET

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Carsharing initiatives can aid in addressing various urban issues by providing access to shared vehicles while restricting the use of private cars. With the growth of the Internet of Things, individuals can use their mobile devices to carry out basic tasks and access shared cars. However, such programs have security concerns, as confidential information, including user identification, location data, and access codes, is transmitted through public channels. This makes it possible for attackers to obtain this information for malicious purposes, underscoring the importance of developing a reliable authentication protocol to enhance security.

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Experimental study on thermal performance of U-type evacuated glass tubular solar collector with low inlet temperature

Cited by 35 publications

References 18 publications

An experimental study of solar receiver under cloudy weather conditions

An experimental study of solar receiver under cloudy weather conditions

Performance Analysis of Flat Plate and Evacuated Tube Collectors

Experimental Analysis on Thermal Efficiency and Heat Loss of the Evacuated Tube Collector with Variable Solar Radition and Wind Speed

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