Influence of lateral heat diffusion on the thermal impedance measurement of photovoltaic panels

Mey, G. De; Wyrzutowicz, J.; Vos, Alexis De; Maranda, Witold; Napieralski, A.

doi:10.1016/j.solmat.2012.12.043

Cited by 10 publications

(7 citation statements)

References 14 publications

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“…The thermal resistance R th and capacitance C th for a PVmodule can be estimated or measured as shown in [7,22]. The PV-cell temperature T C in respect to ambient T A and irradiance G has been found by solving the equation:…”

Section: Simulation Modelmentioning

confidence: 99%

Efficiency of maximum power point tracking in photovoltaic system under variable solar irradiance

Maranda¹,

Piotrowicz²

2014

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. Field conditions decrease the energy output of photovoltaic (PV) systems, mainly due to excessive temperatures. However, in regions with moderate ambient temperatures, as in Poland, solar energy is commonly delivered with highly fluctuating irradiance. This introduces yet another source of energy losses due to the non-ideal tracking of actual position of Maximum Power Point (MPP).Majority of PV-systems are equipped with DC/AC and grid-connected inverter. Since the solar energy flux is variable, an adequate MPP-tracking algorithm is required to handle a wide range of load levels and face rapid changes of input power. Along with the essential DC/AC conversion, the quality of MPP-tracking must also be taken into account in evaluation of inverter efficiency.The tracking in dynamic conditions has been addressed only recently. Several algorithms has been studied theoretically, experimentally or in laboratory conditions by applying artificial input test-patterns. This work takes the opposite approach by applying the recorded real-life solar irradiance and simulating the tracking behavior to study the problem for true field conditions in Poland.The simulation uses the unique high-quality irradiance data collected with 200 ms time resolution. The calculation of both static and dynamic MPP-tracking efficiency has been performed for representative variable-cloudy day, applying commonly used Perturb&Observe tracking algorithm.

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Section: Simulation Modelmentioning

confidence: 99%

Efficiency of maximum power point tracking in photovoltaic system under variable solar irradiance

Maranda¹,

Piotrowicz²

2014

Bulletin of the Polish Academy of Sciences Technical Sciences

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“…It turned out that for thermal problems, the Alternating Current (AC) approach was very useful. These studies have been applied to electronic packages [15][16][17][18], cooling fins [19,20], underground and overhead high voltage cables [21][22][23][24], integrated inductors [25], heat pipes [26] and photovoltaic panels [27].…”

Section: Introductionmentioning

confidence: 99%

“…underground and overhead high voltage cables [21][22][23][24], integrated inductors [25], heat pipes [26] and photovoltaic panels [27].…”

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confidence: 99%

The Influence of an Additional Sensor on the Microprocessor Temperature

Mey

Kos

2020

Energies

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This paper deals with the problem of inserting a temperature sensor in the neighbourhood of a chip to monitor the junction temperature. If the sensor is not in the middle of the heat source, the recorded temperature can be quite different from the chip temperature we are mainly interested in. For the steady state temperature, it is rather easy to introduce a correction factor. For the transient behaviour of the temperature, there is a tremendous difference between the chip and the sensor temperature, which cannot be neglected if the temperature is used as a parameter to change, for example, the clock frequency in order to improve the throughput.

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“…Crystalline silicon is the most dominant material used in PV cells, in the form of a thin layer of polycrystalline silicon (poly-Si) or monocrystalline silicon (mono-Si). However, monocrystalline PV cells can convert solar energy into electrical energy with higher efficiency (up to 15% at 25 o C) than polycrystalline PV cells (around 13% at 25 o C) (Akbarzadeh and Wadowski, 1996;De Mey et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Production of Ceramic Membrane Based on Acid- and Alkali-Activated Metakaolinite as Cooling Material for Monocrystalline Silicon Solar Cell

Septiani

Ramadhy

Islammiyati

et al. 2019

Valensi

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Ceramic membrane based on acid-and alkali-activated metakaolinite has been produced. It was tested as a cooling material for monocrystalline silicon solar cells. The membrane was made by several stages, such as calcination of natural kaolinite at 600 o C for 6 hours to obtain metakaolinite, activation of metakaolinite by concentrated HCl and KOH, and preparation of ceramic membrane. Kaolinite, metakaolinite, and activated metakaolinite were characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), Fourier Transform Infra-red (FTIR), and gas sorption analyzer (GSA). Diffractogram of XRD showed that there was a structural change between activated metakaolinite and natural kaolinite. XRF analysis indicated that the Si/Al of HCl activated metakaolinite was three times higher than natural kaolinite. Activated metakaolinite was made into the membrane by adding a binder, then heated at 800 °C for 6 hours. Photovoltaic (PV) cells with and without cooling material were then analyzed their electrical performances. It was found that the maximum energy conversion yield of PV cells without using cooling material was 2.30%, while the maximum energy conversion yield of PV cells with cooling material of meta-kaolinite activated by HCl and KOH were 2.72% and 2.94%, respectively. AbstrakMembran keramik dari metakaolinit teraktivasi asam dan basa telah berhasil diproduksi. Membran keramik tersebut digunakan sebagai material pendingin pada sel surya berbasis silikon. Membran dibuat melalui beberapa tahapan, di antaranya kalsinasi kaolinit alam pada 600 o C selama 6 jam untuk menghasilkan metakaolinit, aktivasi metakaolinit menggunakan larutan HCl dan KOH pekat, dan pembuatan membran keramik. Kaolinit, metakaolinit, dan metakaolinit teraktivasi terlebih dahulu dikarakterisasi menggunakan difraktometer sinar-x (XRD), fluoresensi sinar-x (XRF), spektrofotometer infra merah (FTIR), dan analisis serapan gas (GSA). Hasil analisis XRD menunjukkan telah terjadi perubahan struktur pada metakaolinit teraktivasi dari kaolinit alam. Hasil analisis XRF mengindikasikan peningkatan nilai rasio Si/Al metakaolinit teraktivasi asam tiga kali lebih besar daripada kaolinit alam. Metakaolinit teraktivasi kemudian dibuat menjadi membran dengan penambahan bahan pengikat, dan dipanaskan pada 800 o C selama 6 jam. Sel fotovoltaik (PV) dengan dan tanpa menggunakan membran kemudian dianalisis kinerjanya. Berdasarkan hasil pengukuran kinerja, rendemen konversi energi maksimum pada intensitas cahaya 100 Watt/m 2 yang dihasilkan oleh sel PV tanpa menggunakan material pendingin adalah 2.30%, sedangkan sel PV yang menggunakan material pendingin dari metakaolinit teraktivasi asam dan basa, masing-masing adalah 2.72% dan 2.94%.Kata Kunci: fotovoltaik, material pendingin, membran keramik, metakaolinit.

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Influence of lateral heat diffusion on the thermal impedance measurement of photovoltaic panels

Cited by 10 publications

References 14 publications

Efficiency of maximum power point tracking in photovoltaic system under variable solar irradiance

Efficiency of maximum power point tracking in photovoltaic system under variable solar irradiance

The Influence of an Additional Sensor on the Microprocessor Temperature

Production of Ceramic Membrane Based on Acid- and Alkali-Activated Metakaolinite as Cooling Material for Monocrystalline Silicon Solar Cell

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