- 标题
- 摘要
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- 实验方案
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A new TRNSYS type for thermosiphon flat-plate solar thermal collectors: validation and optimization procedure
摘要： This paper presents a new TRNSYS Type (called Type 99) which can be used for the energy assessment of thermosiphon Flat-Plate solar thermal Collectors (FPCs) for water heating. The accuracy of this new type is higher than the standard type (Type 45a) available in TRNSYS library, since the density and specific heat of water are estimated according to the operating fluid temperature. The results of a suitable experimental campaign are also presented for different commercial FPCs system layouts. The developed Type 99 is successfully validated, proven by the very good agreement achieved between the simulation and experimental results. By the new Type 99 a suitable Design of Experiment (DoE) analysis is carried out with the aim to assess the design and operating parameters mostly affecting the energy and economic performance of two types of FPCs. Specifically, collector pipe diameters, slope, storage tank volume, and thermal insulation thickness are investigated. The analysis is carried out for three case studies which refer to residential Domestic Hot Water (DHW) production applications and to three different European weather zones (Freiburg, Naples and Larnaca). For these case studies an optimization procedure is also carried out by varying the same design and operating parameters for two different objective functions: best energy behaviour [maximum Primary Energy Saving (PES)] and best economic performance [minimum Simple Pay Back (SPB)]. Interesting novel design criteria and encouraging economic results are obtained.
关键词： economic assessment,DoE analysis,Building solar thermal systems,dynamic energy performance analysis,experimental validation
更新于2025-09-23 15:22:29
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[Energy, Environment, and Sustainability] Advances in Solar Energy Research || Introduction to Advances in Solar Energy Research
摘要： A lot of activity has been taking place in the research community over the decades to efficiently harness solar energy. One way this is fuelled is by the support from the governments which promote the implementation of large-scale projects—whether it be for electric power generation (using PV), or for water heating using solar thermal collectors. These activities involve the efforts of the industry, which keep pace with the latest technology in the world, and are in a race to provide the most reliable technological solution to the customer for harnessing solar energy in an economical and robust manner. This has been the backdrop theme of almost all the chapters included in this book, which have been contributed by various authors from across the world. This is the first chapter of the book, and thus provides an overview of the various topics that will be covered in this book, ranging from an energy roadmap for the future, to technologies advances in the field of photovoltaics and solar cells (DSSC—Dye-Sensitized Solar Cells). It also includes details of solar thermal collector, along with the discussion about its heat transfer aspects. Apart from the two primary uses of solar energy—electric power generation and water heating—there are numerous applications for which it has been used over the years. Several such applications are also discussed in some of the subsequent chapters, such as refrigeration, desalination, gasification, and cooking.
关键词： Photovoltaics,Applications,Solar thermal systems,Solar energy,DSSC,Solar cells
更新于2025-09-23 15:21:01