Estimation and optimization of thermal performance of evacuated tube solar collector system

Dikmen, Erkan; Ayaz, Mahir; Ezen, H. Hüseyin; Küçüksille, Ecir Uğur; Şahin, Arzu Şencan

doi:10.1007/s00231-013-1282-0

Cited by 30 publications

(6 citation statements)

References 23 publications

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“…(6) pump power of water heater system is negligible; (7) heat loss between the collector and water tank is negligible;…”

Section: Numerical Model and Model Validation Of Solar Water Heating mentioning

confidence: 99%

“…Heat transfer coefficient between inner glass surface and water flow can be calculated by (6) [11] and (7) [12]. Heat transfer coefficient is calculated by (6) when Re = 2300 ∼ 10 6 and is calculated by (7) when Re ≤ 2300. Here Re is the Reynolds number; is the diameter of inner glass tube; is the length of inner glass tube; pr is the water Prandtl number for water temperature; pr is the water Prandtl number for inner glass tube temperature; consider The simulation of mean water tank temperature based on the numerical model described in Section 4 is also carried out under the same condition as the experiment and the simulation results are given along with the experimental data.…”

Section: Heat Transfer Coefficientmentioning

confidence: 99%

“…The capacity of energy production of all-glass evacuated tube in China in 2010 was estimated to be 46 million m 2 per year [2] and this was also widely used in many fields such as industrial hot water, HVAC, drying, agriculture, aquiculture, and seawater desalination. A lot of experimental and theoretical researches on traditional all-glass evacuated tube collectors have been undertaken by many scholars [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

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A Study on Thermal Performance of a Novel All-Glass Evacuated Tube Solar Collector Manifold Header with an Inserted Tube

Yang

Jiang

Hou

et al. 2015

International Journal of Photoenergy

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A novel all-glass evacuated tube collector manifold header with an inserted tube is proposed in this paper which makes water in allglass evacuated solar collector tube be forced circulated to improve the performance of solar collector. And a dynamic numerical model was presented for the novel all-glass evacuated tube collector manifold header water heater system. Also, a test rig was built for model validation and comparison with traditional all-glass evacuated tube collector. The experiment results show that the efficiency of solar water heater with a novel collector manifold header is higher than traditional all-glass evacuated tube collector by about 5% and the heat transfer model of water heater system is valid. Based on the model, the relationship between the average temperature of water tank and inserted tube diameter (water mass flow) has been studied. The results show that the optimized diameter of inserted tube is 32 mm for the inner glass with the diameter of 47 mm and the water flow mass should be less than 1.6 Kg/s.

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“…(6) pump power of water heater system is negligible; (7) heat loss between the collector and water tank is negligible;…”

Section: Numerical Model and Model Validation Of Solar Water Heating mentioning

confidence: 99%

Section: Heat Transfer Coefficientmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Study on Thermal Performance of a Novel All-Glass Evacuated Tube Solar Collector Manifold Header with an Inserted Tube

Yang

Jiang

Hou

et al. 2015

International Journal of Photoenergy

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“…Dikmen et al [17] worked on the modeling of an evacuated tube through the application of ANFIS and ANN algorithms. The results gathered in their study were reliable and were in good agreement with the results collected from experimental studies done by different researches.…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of solar flat plate collector using different working fluids through computational fluid dynamics

et al. 2020

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The aim of this study involves establishing a three-dimensional computational fluid dynamic (3D-CFD) model of solar flat plate collector (SFPC) in order to investigate the effect of operating and geometric parameters on thermal efficiency. In this research work, commercial CFD code ANSYS FLUENT ® 14.0 version was used for the development of a model of solar plate collector. The single circular tube geometry was created using ANSYS DesignModeler ® 14.0. The general continuity equation along with Navied-Stokes equations was solved for tracking motion of the working fluid. The general k-ε turbulence modeling approach was used for solving the turbulence in the flow. Solar ray tracing was activated for calculating solar load in the model. The latitude and longitude of the Hyderabad region were inserted in the solar raytracing model for calculating solar intensity as per local conditions. Two fluids i.e., water and air were circulated with different flow rates in the developed model of SFPC. It was observed that water gave higher efficiency due to high density and thermal conductivity. The simulation results gathered revealed that the temperature of water and air was raised by almost 79 °C and 73 °C respectively.

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“…Caner et al [25] and Benli [26] applied ANN model for investigation on thermal performance calculation of two types of solar air collectors. Dikmen et al [27] structured artificial neural networks and adaptive neuro fuzzy inference system (ANFIS) models to predict the performance of evacuated tube solar collectors. Kalogirou et al [28] implemented ANN tool for performance prediction of large solar systems.…”

Section: Introductionmentioning

confidence: 99%

Archives of Thermodynamics

Ghritlahre¹,

Prasad²

2019

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The objective of present work is to predict the thermal performance of wire screen porous bed solar air heater using artificial neural network (ANN) technique. This paper also describes the experimental study of porous bed solar air heaters (SAH). Analysis has been performed for two types of porous bed solar air heaters: unidirectional flow and cross flow. The actual experimental data for thermal efficiency of these solar air heaters have been used for developing ANN model and trained with Levenberg-Marquardt (LM) learning algorithm. For an optimal topology the number of neurons in hidden layer is found thirteen (LM-13).The actual experimental values of thermal efficiency of porous bed solar air heaters have been compared with the ANN predicted values. The value of coefficient of determination of proposed network is found as 0.9994 and 0.9964 for unidirectional flow and cross flow types of collector respectively at LM-13. For unidirectional flow SAH, the values of root mean square error, mean absolute error and mean relative percentage error are found to be 0.16359, 0.104235 and 0.24676 respectively, whereas, for cross flow SAH, these values are 0.27693, 0.03428, and 0.36213 respectively. It is concluded that the ANN can be used as an appropriate method for the prediction of thermal performance of porous bed solar air heaters.

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Estimation and optimization of thermal performance of evacuated tube solar collector system

Cited by 30 publications

References 23 publications

A Study on Thermal Performance of a Novel All-Glass Evacuated Tube Solar Collector Manifold Header with an Inserted Tube

A Study on Thermal Performance of a Novel All-Glass Evacuated Tube Solar Collector Manifold Header with an Inserted Tube

Performance evaluation of solar flat plate collector using different working fluids through computational fluid dynamics

Archives of Thermodynamics

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