Optimization of Control Parameters Affecting Panel Surface Temperature in Air-Cooled PVT Panels

Electric generation using the photovoltaic (PV) effect is considered ideal in South Sumatra as a response to the government policy to increase the utilization of renewable energy to support the depletion of conventional energy. PV panels can be installed in a fishing village in the Sungsang Estuary. This paper examined the eligibility analysis for the installation of PV panels on brackish water. In this research, two Panels are installed, the first one is floating over a water body, and the second is ground mounted as a comparison of electricity produced and efficiency. The Jsc floating and ground mounting differ in 0.4435 A. The measured Jload in floating PV panels is 0.3900 A higher than the ground mounting. The measured Voc at the floating PV panels is 0.2935 V higher, and the Vload of the floating PV panel is 3.0742 V higher than the ground mount. The differences are due to the floating PV panel surface temperature being lower than ground mounting. Electricity generated by floating PV panels is averagely 11.89 Watt higher, and the efficiency is 4% higher than that of ground installation. This experiment also shows that PV panels can be installed over brackish water in the fishing village of Sungsang Estuary.

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Performance analysis of PV panel under varying surface temperature

MATEC Web of Conferences ◽

10.1051/matecconf/201814404004 ◽

2018 ◽

Vol 144 ◽

pp. 04004 ◽

Cited By ~ 3

Author(s):

Tripathi Abhishek Kumar ◽

Ch. S. N Murthy ◽

Aruna Mangalpady

Keyword(s):

Surface Temperature ◽

Power Output ◽

Fill Factor ◽

Open Circuit Voltage ◽

Short Circuit ◽

Short Circuit Current ◽

Open Circuit ◽

Electrical Parameters ◽

Pv Panel ◽

Panel Surface

The surface temperature of PV panel has an adverse impact on its performance. The several electrical parameters of PV panel, such as open circuit voltage, short circuit current, power output and fill factor depends on the surface temperature of PV panel. In the present study, an experimental work was carried out to investigate the influence of PV panel surface temperature on its electrical parameters. The results obtained from this experimental study show a significant reduction in the performance of PV panel with an increase in panel surface temperature. A 5W PV panel experienced a 0.4% decrease in open circuit voltage for every 1°C increase in panel surface temperature. Similarly, there was 0.6% and 0.32% decrease in maximum power output and in fill factor, respectively, for every 1°C increase in panel surface temperature. On the other hand, the short circuit current increases with the increase in surface temperature at the rate of 0.09%/°C.

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Study of the Parameters Dispersion Effect in Photovoltaic Systems, in Terms of the Coveragetype

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.716.497 ◽

2013 ◽

Vol 716 ◽

pp. 497-501

Author(s):

Héctor Hugo Rodríguez Santoyo ◽

Francisco Javier Ramírez Arenas ◽

Josémartin Medina Flores ◽

Beatriz Ruiz Camacho

Keyword(s):

Surface Temperature ◽

Visible Light ◽

Infrared Radiation ◽

Photovoltaic Cells ◽

Electromagnetic Spectrum ◽

Solar Panels ◽

Dispersion Effect ◽

Infrared Transmittance ◽

Electric Generation ◽

Panel Surface

In this work, was considered the thesis that the optic properties of anti-reflecting and the satin-like glasses can improve the efficiency of solar panels that use plastic covertures or conventional glasses as coverage. The infrared radiation that is not turned into electricity with the conventional photovoltaic cells, increments the panel surface temperature, of the supporting structure and of the photovoltaic cells. For above 35oC it is possible that some cells stop converting the visible light in electricity due toparameters dispersion effect, with this, the efficiency of electric generation is diminished. In the electromagnetic spectrum, the wavelength of infrared radiation is since 800nm, the anti-reflecting glasses transmittance is since430 to 680 nm, while the satin-like glassestransmittance issince 500 to 600nm, therefore for thiscause the infrared transmittance is not observed. In this work, it was proved that the use of anti-reflecting glasses and satin-like glasses improves the conventional solar panels efficiency. The results suggest an efficiency of 31.6 % of solar energy conversion with the anti-reflecting glass, and 36% with the satin-like glass, when these were used as cover panel photovoltaic.

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Effect of tamoxifen on breast surface temperature in women on hormone replacement therapy

European Journal of Cancer ◽

10.1016/s0959-8049(02)80394-x ◽

2002 ◽

Vol 38 (11) ◽

pp. S120

Author(s):

L Hayes

Keyword(s):

Hormone Replacement Therapy ◽

Surface Temperature ◽

Replacement Therapy ◽

Hormone Replacement

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Methods for Restricting Maximum Exposure Rate in Computerized Adaptative Testing

Methodology ◽

10.1027/1614-2241.3.1.14 ◽

2007 ◽

Vol 3 (1) ◽

pp. 14-23 ◽

Cited By ~ 9

Author(s):

Juan Ramon Barrada ◽

Julio Olea ◽

Vicente Ponsoda

Keyword(s):

Measurement Accuracy ◽

Computerized Adaptive Testing ◽

Computation Time ◽

Adaptive Testing ◽

Exposure Rate ◽

Control Parameters ◽

The Impact ◽

Two Alternatives ◽

Selection Of ◽

Maximum Exposure

Abstract. The Sympson-Hetter (1985) method provides a means of controlling maximum exposure rate of items in Computerized Adaptive Testing. Through a series of simulations, control parameters are set that mark the probability of administration of an item on being selected. This method presents two main problems: it requires a long computation time for calculating the parameters and the maximum exposure rate is slightly above the fixed limit. Van der Linden (2003) presented two alternatives which appear to solve both of the problems. The impact of these methods in the measurement accuracy has not been tested yet. We show how these methods over-restrict the exposure of some highly discriminating items and, thus, the accuracy is decreased. It also shown that, when the desired maximum exposure rate is near the minimum possible value, these methods offer an empirical maximum exposure rate clearly above the goal. A new method, based on the initial estimation of the probability of administration and the probability of selection of the items with the restricted method ( Revuelta & Ponsoda, 1998 ), is presented in this paper. It can be used with the Sympson-Hetter method and with the two van der Linden's methods. This option, when used with Sympson-Hetter, speeds the convergence of the control parameters without decreasing the accuracy.

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933 A computerized system for single-beat extraction of ventricular mechanics and neuro-humoral control parameters

European Heart Journal ◽

10.1016/s0195-668x(03)94225-4 ◽

2003 ◽

Vol 24 (5) ◽

pp. 154

Author(s):

A RIPOLI

Keyword(s):

Control Parameters ◽

Ventricular Mechanics ◽

Computerized System ◽

Humoral Control

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Application of pyrometer and standard sample to determine surface temperature of studied materials

Izmeritel`naya Tekhnika ◽

10.32446/0368-1025it.2019-12-9-13 ◽

2019 ◽

pp. 9-13

Author(s):

V.Ya. Mendeleyev ◽

V.A. Petrov ◽

A.V. Yashin ◽

A.I. Vangonen ◽

O.K. Taganov

Keyword(s):

Composite Material ◽

Surface Temperature ◽

Relative Error ◽

Wavelength Range ◽

Standard Sample ◽

A Priori ◽

Temperature Changes ◽

Surface Temperatures ◽

Relative Errors ◽

Normal Emissivity

Determining the surface temperature of materials with unknown emissivity is studied. A method for determining the surface temperature using a standard sample of average spectral normal emissivity in the wavelength range of 1,65–1,80 μm and an industrially produced Metis M322 pyrometer operating in the same wavelength range. The surface temperature of studied samples of the composite material and platinum was determined experimentally from the temperature of a standard sample located on the studied surfaces. The relative error in determining the surface temperature of the studied materials, introduced by the proposed method, was calculated taking into account the temperatures of the platinum and the composite material, determined from the temperature of the standard sample located on the studied surfaces, and from the temperature of the studied surfaces in the absence of the standard sample. The relative errors thus obtained did not exceed 1,7 % for the composite material and 0,5% for the platinum at surface temperatures of about 973 K. It was also found that: the inaccuracy of a priori data on the emissivity of the standard sample in the range (–0,01; 0,01) relative to the average emissivity increases the relative error in determining the temperature of the composite material by 0,68 %, and the installation of a standard sample on the studied materials leads to temperature changes on the periphery of the surface not exceeding 0,47 % for composite material and 0,05 % for platinum.

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