Forced convection heat transfer from a flat-plate model collector on roof of a model house

Onur, Nevzat

doi:10.1007/bf01541111

Cited by 12 publications

(6 citation statements)

References 4 publications

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“…The average ambient temperature for surrounding environment was assumed to be 35 °C [8]. Meanwhile, the heat transfers coefficient (h c ) for free convection for PV panel was calculated to be 15 W/m 2 by using Equation (1) [9] with the average wind speed (v) of 2.5 m/s [10]. h c = 5.7 + 3.8v…”

Section: Methodsmentioning

confidence: 99%

Investigation of the Effect Temperature on Photovoltaic (PV) Panel Output Performance

Razak

Irwan

Leow

et al. 2016

International Journal on Advanced Science, Engineering and Information Technology

162

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The main limit of PV systems is the low conversion efficiency of PV panels, which is strongly influenced by their operating temperature. Lack of accuracy in consideration through PV panel temperature increases the financial risk of system installation. This present study investigates the effects of operating temperature on monocrystalline PV panel at Perlis, Malaysia. A selected model of PV panel firstly was simulated using PVsyst software in order to evaluate its output performance. Meanwhile, PROVA 200 used to measure and record all electrical data for outdoor experimental during the sunniest day. Besides, the thermal distribution was analysed through PV panel temperatures and thermal imaging. Simulation results implied that the output power of PV panel decreases with increasing of its working temperature followed by the efficiency. The experimental results obviously show that the standard test condition (STC) parameters do not represent the real operating conditions of PV panel for outdoor conditions. Less output power was produced affected by the atmospheric factors such as solar irradiance and ambient temperature. These both factors strongly affected the PV panel temperature distribution. In short, the elevating of PV panel temperature contributed to the negative impact on output performance of the panel.

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Section: Methodsmentioning

confidence: 99%

Investigation of the Effect Temperature on Photovoltaic (PV) Panel Output Performance

Razak

Irwan

Leow

et al. 2016

International Journal on Advanced Science, Engineering and Information Technology

162

View full text Add to dashboard Cite

show abstract

“…Kind et al [12] performed heat transfer experiments to study the wind effects on an array of test plates mounted on the roof of a model house under turbulent flow conditions. Onur [13] carried out experimental study for laminar forced convection heat loss from the surface of flatplate model collectors flush mounted on the roof of a model residential house. Literature survey indicated that previous experimental results have not been confirmed with numerical studies.…”

Section: Introductionmentioning

confidence: 99%

Three dimensional numerical and experimental study of forced convection heat transfer on solar collector surface

Turgut

Onur

2009

International Communications in Heat and Mass Transfer

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“…According to the available literature, the correlations (18) and (19) are the only correlations for determining the heat transfer coefficient due to forced convection which take into account the variables α, v w , and L c , and which are valid in a wide range of Reynolds and Prandtl numbers. The correlation coefficients a 1 , b 1 , c 1 , d 1 , a 2 , b 2 , c 2 , and d 2 are unknown and will be determined under the condition that the correlations (18) and (19) represent the best approximation for the experimentally obtained values of the coefficient h windward . The genetic algorithm (GA) and the least squares method are used to determine the aforementioned coefficients.…”

Section: Correlations For Forced Convectionmentioning

confidence: 99%

“…where the values of h windward are calculated using correlations (18) and (19), respectively. The values for h windward,i in function of v w , for given values of α, are obtained from the dependences of the Nusselt number [18,19], Stanton number [20] and Colburn factor [21,22] on the Reynolds number for different values of α, v w , and L c , or from the dependence of heat losses from a flat-plate collector on v w [23]. This was accomplished by simple mathematical operations.…”

Section: Correlations For Forced Convectionmentioning

confidence: 99%

A thermal model for open-rack mounted photovoltaic modules based on empirical correlations for natural and forced convection

Perović¹,

Klimenta²,

Jevtić³

et al. 2019

THERM SCI

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This paper proposes a thermal model for calculating the temperature of open-rack mounted photovoltaic (PV) modules taking into account the meteorological conditions, position (i. e. the inclination of one PV module and the angle between its surface and wind direction) and technical characteristics of the PV modules. The present model is valid for the steady-state operation and is based on the energy balance equation in which the forced convection is modelled by the new empirical correlations. The possibility of occurrence of the flow separation along the surfaces of the PV modules is included in these correlations. The effect of the angle between the wind direction and the PV module plane, which is usually ignored in the modelling of forced convection, is also taken into consideration. In this manner, it is possible to estimate the temperature of PV modules more precisely, as well as to determine the power and efficiency which depend on the temperature. For four particular PV modules, it is found that the temperatures, obtained using the proposed thermal model, are in good agreement with the corresponding measured temperatures. Compared with the other models commonly used for thermal analysis of PV modules (SNL and NOCT-based correlations), this model yielded better results. The deviation of the PV module temperature calculated using the proposed thermal model from the measured one is up to 2 °C, and the deviations of the PV module temperatures calculated using the SNL and NOCT-based correlations from the measured ones amount up to 5 °C and 20 °C, respectively, depending on the PV module type and ambient conditions.

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Forced convection heat transfer from a flat-plate model collector on roof of a model house

Cited by 12 publications

References 4 publications

Investigation of the Effect Temperature on Photovoltaic (PV) Panel Output Performance

Investigation of the Effect Temperature on Photovoltaic (PV) Panel Output Performance

Three dimensional numerical and experimental study of forced convection heat transfer on solar collector surface

A thermal model for open-rack mounted photovoltaic modules based on empirical correlations for natural and forced convection

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