Power & Energy Solutions

The premier renewable energy publication

Pfeiffer Vacuum are specialists in vacuum technology. They provide the highest quality testing in order to provide top class products. Here we learn about the importance of the pump down curves and the different materials that can affect them. Displaying and interpreting processes in different vacuum ranges Pump down curves are a popular control instrument when designing and operating a vacuum system. Thanks to them, any problems in the system can be derived and the correct pump performance can be assessed. A pump down curve describes a time-dependent pressure drop in a vacuum system. In a graphical representation, the time is applied to the X-axis and the pressure to the Y-axis. For the known geometry of the vacuum chamber and pumps, a pump down curve can be calculated. Any deviations between the calculated and the measured pump down curve will often provide information about problems in the vacuum system. This also applies to the comparison of curves measured over long-term use with a reference curve. Pump curves in in the low vacuum range: displaying connections, interpreting, and applying A reference curve can be measured when the system runs properly and without any problems after startup. Under these conditions, the pressure drop is measured over time

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It is well known that on large scale PV farms clean panels are essential in order to produce peak yields. The Italian company Messersì has been offering PV cleaning solutions for 7 years. Their product, Roboklin 25, is a fully automated machine and it delivers efficient cleaning to large PV farm operators. The company’s main business is actually building special vehicles for construction and agriculture, the Roboklin 25 was developed as a solution for cleaning solar modules. 40 units have been sold worldwide so far. During 7 years, working in many different conditions around the world Messersì acquired a lot PV cleaning experience. The tracked vehicle is powered by a turbocharged diesel engine from Kubota and has a maximum cleaning capacity of 1MW in five hours. The telescopic arms have maximum lengths of 4 and 6.5m. Two washing systems can be mounted on them. There is either a sprinkler system with a maximum pressure of 40bar or a rotating brush: 3 sizes of 2.2, 3.6 and 4.2m long. Both systems are supplied from a tank with a capacity of 2400l. Cleaning is controlled through ultrasound sensors, which ensure that the distance between the modules and the cleaning system is always the same, automatically

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Dirk Tegtmeyer, CEO Ingenieurbüro Mencke & Tegtmeyer GmbH, gives PES a short look into the near future and explains why quality is paramount as PV conquers the world and nobody can stop it. Even in Germany, where politicians tried to shut down PV installations and industry, the news gets better every year. The last tender for renewables saw a 32 to 0 for PV to wind energy. This is good for PV, but we should have wind in mind as well. The actual news says that Intersolar Germany is already booked out. And Fraunhofer ISE announces that PV energy is already cheaper than fossil energy in some installations in Germany. While Photovoltaic components become cheaper and cheaper, one has to think about the energy output. What will be main stream and what will become another part of PV industries? For residential houses it will be cheaper to install a small battery system for use of PV energy instead of buying from the utility companies. Using optimised control systems the energy drawn from the grid can be minimised to less than 20 % of the overall consumption. Together with new concepts of electric vehicles, with bidirectional charging, this step can get to

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PES asked Tyler Ogden, Lux Research Inc. to give us his expert viewpoint on the longevity of PV systems. Lux Research is a leading provider of research and advisory services, helping clients drive growth through technology innovation. Utility-scale systems are now a competitive choice for electricity supply, with bids undercutting conventional sources of generation in some regions, while other regions see competitive subsidy-free deployments. This has largely been the result of declining module costs. Manufacturers have obtained significant economies of scale and have continued to adopt higher efficiency cell technologies. Meanwhile other players across the supply chain that offer balance of system components and developed projects have reached maturity, contributing to lowering the capital expense of new installations to a point where sub dollar-per-watt systems are now feasible. However, the rate of cost declines has begun to taper off. If solar costs are to continue to drop and maintain the precedent of low-cost renewables, the industry must look elsewhere – must look forward in time. The standard lifetime for a photovoltaic installation is 20 to 25 years, nearly double the time from when the global solar industry began to mature in early 2010s. The focus has primarily been in reducing dollar-per-watt costs to

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In this day and age recycling should be a top priority throughout the renewable energies sector. Dr. Palitzsch from Loser Chemie GmbH, reminds PES readers about the latest update to the EU waste legislation. It’s remarkable to see how it is possible to achieve total recovery of all materials, in both thin-film PV and silicon-based modules. According to the latest revision of the EU waste legislation (WEEE), producers of solar photovoltaic panels are responsible for the disposal and recycling of the modules they sell in EU Member States. In addition to this we also have a few other reasons to recycle all and any used materials. Recycling allows the materials, in otherwise one-use products, to go on to become something new and saves resources involved in sourcing new materials: that´s why it is amazing. And the best way is, of course, the complete recovery of all components. In recent years, Loser Chemie GmbH has led the search for a universal concept, for as many solar module types as possible. Today, the company has introduced a technology that enables the recycling of both thin-film PV and silicon-based modules. An important role is played by light and water. Used correctly complete disassembly of old solar

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Kipp & Zonen continue with their quest to improve the DustIQ, which can now be locally calibrated for the exact dust composition on site. This means the PV panels can be monitored 24/7 and cleaned whenever necessary. PES delves deeper to bring you the latest on this affordable and compact, cost saving, optical measuring tool. The maximum efficiency exhibited by solar cells has been incrementally improved over 150 years of scientific endeavour. But while photovoltaic technology continues to improve, the amount of power we can generate from solar cells is ultimately dictated by environmental factors. Primarily these are solar irradiance, temperature, and soiling. While the effects of solar irradiance and temperature are well-understood, the detrimental effects of soiling on solar panel performance often go overlooked. However, new technologies are making it easier than ever before to measure the effects of panel soiling on photovoltaic performance. Advances in increasing solar cell efficiency The world’s first photovoltaic device was created by Edmond Becquerel at the ripe old age of 19, while conducting experiments in his father’s laboratory.1 Edmond, the son of prolific electro-/bio-chemist Antoine Becquerel, found that a platinum electric I think they mean conductor coated with a thin layer of silver chloride could be

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Make plans to attend Intersolar and ees North America, the first major solar and storage industry events of the year in the United States. The co-located exhibition and conference series will return to the heart of the largest solar and storage market in the country, July 10th - 12th at the Moscone Center in San Francisco. Together, these events sit at the cross-section of solar technology, energy storage and smart transportation, and connect industry professionals from across the world. Since 2008, Intersolar North America has served as the industry’s go-to event for invaluable information and premier networking opportunities, and this year’s event is no different. Expect to see an expanded focus on the technologies and market opportunities for solar and storage, as well as a new special exhibition, Power2Drive, focused on the electrification of transportation. Conference sessions and exhibition workshops will feature insightful commentary from leading executives, policymakers, and industry experts designed to give attendees a critical business edge. This year, attendees will benefit from special attention paid to the recent tariffs passed by the Trump Administration in response to the Section 201 trade complaint, as well as conference sessions on smart renewable energy, the rise of project finance, applications for

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It’s that time of the year. Are you ready for Intersolar Europe and Intersolar North America? PES brings you previews of two of the biggest solar shows. Be sure to come along and make the most of the opportunity to see the latest advance technology, the new players in the market, catch up with old favourites and network like crazy. Smart, solar, sector coupling: Intersolar Europe 2018 showcases the future of modern energy supply. A sunny outlook for the European and global photovoltaics (PV) markets: Photovoltaics deployment of around 110 gigawatts is expected worldwide for 2018 – a significant step forward for PV. The European PV market too is sending out positive signals. New PV systems with a total output of at least 8.61 gigawatts were installed across the continent last year alone. According to the latest analysis by SolarPower Europe, this represents a 28 percent increase over 2016. Over 30 percent growth has been forecast for 2018 – alongside Germany, most notably in France, Italy, the Netherlands and Spain. The PV market in Europe is primarily being driven by public tenders and power purchase agreements. The advantages of solar power self-consumption are also bolstering growth. In Spain and the Netherlands, 2018

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PES were eager to meet Frank Jürgens, Sales & Marketing Director, INDEOtec SA, to learn more about their innovative deposition platform for HJT and high-efficiency cells, OCTOPUS, using the Mirror reactor concept. It is both renowned and exclusive. He predicts higher and cleaner manufacturing standards including high-end, high-purity tool sets are on the near horizon and this dynamic company is ready to adopt them. PES: Welcome back to PES Solar/PV magazine. Thanks for talking with us. For the benefit of our readers we would like you to begin by explaining about the background of INDEOtec and the importance of the Solar/PV industry to you. Frank Jürgens: Founded in 2007, INDEOtec is a relatively new, Swiss based equipment manufacturing company, headquartered in Neuchâtel (NE), which specialises in high-end thin film deposition technology, mainly PECVD and PVD. The senior team has an impressive track record of PECVD reactor technology and cluster tool development, for the display flat panel and PV thin film industry, which dates back to 1980. For example, key PECVD reactor milestones such as the Plasmabox and more than 6 system generations of the famous KAI PECVD cluster tool, for substrate panel sizes of Gen 5 and above have been developed by Prof.

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More and more home owners are installing PV systems. How efficient are these systems? What does the industry need to do to support this growth area? PES takes a look at Huawei’s new, flexible solution. Across solar markets globally, we are continuing to witness the maturation of utility scale solar, with subsidy-free commercial projects increasing in frequency. As solar’s share in global energy generation continues to rise exponentially, the industry’s ability to innovate expands too. The rapid technological developments and cost reductions that have been driven by investment in utility scale are also having a positive influence on the growth of the residential sector. From an industry perspective, this growth has been accompanied by a proliferation of residential PV systems and technologies now available to installers and homeowners. So with residential solar now set for another significant period of expansion, it is essential that PV technology developers are able to offer systems that can handle the huge variety of customer demands across what is an increasingly competitive and crowded marketplace. The growth of residential Previously, residential solar was supported by necessary financial incentives in order to prove attractive to homeowners. As we look at the costs of a typical residential PV system in some

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