The primary goal of this project is to reduce the module operating temperature below the benchmark TPT backsheet temperature using newly developed TCBs by the industry. The most commonly used PV backsheet material has been polyvinyl fluoride (DuPont trade name “Tedlar”)-based backsheet, which typically has three layers: Tedlar–polyethylene terephthalate (PET)–Tedlar (TPT). A thermal mapping of PV plants has also been investigated and presented in this study. The temperature of PV modules installed in a large multi-MW plant can also be influenced by their physical locations in the plants due to the influence of wind direction. The primary goal of this study is to reduce the operating temperature of PV modules using thermally conductive backsheet (TCB) substrates developed by the industry. The primary thermal properties of module construction materials influencing the PV module temperature are: the optical transmissivity and thermal conductivity of superstrate, the thermal conductivity of substrate, the thermal conductivity of encapsulant and the efficiency of the encapsulated solar cells. The primary weather parameters influencing the PV module temperature are: the ambient temperature (directly related), irradiance (directly related), and wind speed (inversely related). The more » module operating temperature is dictated by the weather parameters and the thermal properties of module construction materials. Reducing the operating temperature lowers the levelized cost of energy (LCOE) via increased energy production (i.e., more kilowatt hour over the life of the asset) and increased service lifetime (years in the field). Increasing a module’s operating temperature reduces its power output due to an increase in the semiconductor’s intrinsic carrier density, leading to a reduction in the open-circuit voltage and, subsequently, reducing the maximum power point voltage. The lower the module operating temperature, the higher is its performance. The performance of photovoltaic (PV) modules is primarily influenced by the plane of array (POA) irradiance and their operating temperature. Solar Energy Technologies Office OSTI Identifier: 1333376 Report Number(s): SAND2016-7976J Journal ID: ISSN 2156-3381 646674 Grant/Contract Number: AC04-94AL85000 Resource Type: Journal Article: Accepted Manuscript Journal Name: IEEE Journal of Photovoltaics Additional Journal Information: Journal Name: IEEE Journal of Photovoltaics Journal ID: ISSN 2156-3381 Publisher: IEEE Country of Publication: United States Language: English Subject: 42 ENGINEERING 47 OTHER INSTRUMENTATION 14 SOLAR ENERGY reliability Accelerated life test microinverter (MI) module-level power electronics (MLPE) optimizer photovoltaics = , (SNL-NM), Albuquerque, NM (United States) Sponsoring Org.: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Publication Date: Thu Nov 10 00:00: Research Org.: Sandia National Lab. Arizona State Univ., Mesa, AZ (United States).TUV Rheinland PTL, Tempe, AZ (United States) Arizona State Univ., Mesa, AZ (United States).(SNL-NM), Albuquerque, NM (United States) Lastly, the result of this testing highlights the performance of MLPE units under the application of several accelerated environmental stressors. Additionally, this work is the first to show in situ power measurements, as well as more » periodic efficiency measurements over a series of experimental tests, demonstrating whether certain tests result in long-term degradation or immediate catastrophic failures. The first independent long-term experimental data regarding damp heat and grid transient testing, as well as the longest term (>9 month) testing of MLPE units reported in the literature for thermal cycling and high-temperature operating life, are included in these experiments. The accelerated stress tests (thermal cycling test per IEC 61215 profile, damp heat test per IEC 61215 profile, and static temperature tests at 100 and 125 ☌) were performed under powered and unpowered conditions. Conf., 2015, is reported for reliability testing in the literature), as well as the largest, experimental sets in public literature, both in the sample size (five manufacturers including both dc/dc and dc/ac units and 20 units for each test) and the number of experiments (six different experimental test conditions) for MLPE devices. entitled “Dominant factors affecting reliability of alternating current photovoltaic modules,” in Proc. This dataset is one of the first (only the paper by Parker et al. This work has applied a suite of long-term-reliability accelerated tests to a variety of module-level power electronics (MLPE) devices (such as microinverters and optimizers) from five different manufacturers.
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