Дисертації з теми "Parabolic Trough Collector (PTC)"
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Nation, Deju Denton. "A conceptual electrical energy storage (EES) receiver for solar parabolic trough collector (PTC) power plants." Thesis, University of Leeds, 2013. http://etheses.whiterose.ac.uk/5331/.
Повний текст джерелаSotte, Marco. "Design, test and mathematical modeling of parabolic trough solar collectors." Doctoral thesis, Università Politecnica delle Marche, 2012. http://hdl.handle.net/11566/242075.
Повний текст джерелаSolar radiation at its origin is a high-exergy energy source: the Sun has an irradiance of about 63 MW/m2. But on the Earth’s surface solar energy flow dramatically decreases. For this reason, when high temperatures or high-exergy need to be reestablished, concentrated solar systems are adopted. Among all possible geometries, parabolic trough collectors are by far the most widespread technology. A field of usage of PTCs is in industrial process heat: this application has a dramatic potential and can be adopted at latitudes like those of central and southern europe. In this thesis the results of research project (PTC.project) for the study of PTCs in IPH and other heat demands in the temperature range from 80 to 250 °C are exposed. The design and manufacture of two prototypes are described in detail, giving complete information on geometrical characteristics, materials and manufacturing processes. Then the results of preliminary tests on the mentioned prototypes are produced, together with the characteristics of a test bench designed to determine PTCs performances with water and heat transfer oil as working fluids in a temperature range from 10 to 150 °C. Then a mathematical model, able to determine the performance of any PTC is described: the model accounts for optical and thermal losses of the collector, and also contains a routine code to calculate the solar position. In the end a simulation environment for annual analysis of the performance of a PTC applied to a specific process heat demand load is presented and the results obtained on a realistic heat demand yearly profile are described. The energetic results suggest that there could be space for this technology in the variety of renewable energies that will be needed to meet international goals in terms of energy and environment in the nearest future. But the experience acquired also suggests that investments are needed if an acceleration on the spreading of PTCs and other CSP technologies is to be realized
Brooks, Michael John. "Performance of a parabolic trough solar collector." Thesis, Link to the online version, 2005. http://hdl.handle.net/10019/984.
Повний текст джерелаHachicha, Ahmed Amine. "Numerical modelling of a parabolic trough solar collector." Doctoral thesis, Universitat Politècnica de Catalunya, 2013. http://hdl.handle.net/10803/129729.
Повний текст джерелаAlsaady, Mustafa Mohammed H. "Innovative design for ferrofluids based parabolic trough solar collector." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/48221/.
Повний текст джерелаWoodrow, Oliver Rhys. "Characterisation of a parabolic trough collector using sheet metal and glass mirror strips." Diss., University of Pretoria, 2017. http://hdl.handle.net/2263/62804.
Повний текст джерелаDissertation (MEng)--University of Pretoria, 2017.
Chemical Engineering
MEng
Unrestricted
Carrillo, Juan Felipe (Carrillo Salazar). "Mechanical development of an actuation system for a parabolic solar trough collector." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/83687.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (page 26).
This thesis documents my personal contribution to the development of a hydraulic-based actuation system for a solar trough collector. The goal of this project was to design the actuation system using hydraulic actuators for a four meter solar collector prototype in Pittsfield, New Hampshire. After considering several hydraulic system architectures and conducting in-depth analysis into two of them, the idler pulley scheme was chosen. This mechanism uses a double rod end hydraulic actuator connected to wire rope wrapped around a capstan drum and an idler pulley. The model was optimized for mechanical performance, and it is expected to be a more cost effective option than the existing actuation system in New Hampshire once the controls equipment required to actuate the hydraulic cylinders for the new design is specified.
by Juan Felipe Carrillo.
S.B.
Meiser, Siw [Verfasser]. "Analysis of parabolic trough concentrator mirror shape accuracy in laboratory and collector / Siw Meiser." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2014. http://d-nb.info/1052217427/34.
Повний текст джерелаIbrahim, Idowu David. "Development of Smart Parabolic Trough Solar Collector for Water Heating and Hybrid Polymeric Composite Water Storage Tank." Electronic Thesis or Diss., université Paris-Saclay, 2020. http://www.theses.fr/2020UPASG049.
Повний текст джерелаIn recent years, various energy sources and methods have been used to heat water in domestic and commercial buildings. The known sources for water heating include electrical energy and solar radiation energy in the urban regions or burning of firewood in the rural areas. Several water heating methods may be used such as electrical heating elements, solar concentrators, flat plate collectors and evacuated tube collectors. This thesis focuses on ways to further improve the system’s performance for water heating through the combined use of solar energy and solar concentrator technique. Furthermore, the study proposed an alternative design method for the hot water storage tank.The solar collector-supporting frame was designed and analysed using Solidworks®. The forces acting on the structural members were simulated to determine the capacity of the frame to sustain the load, and the possible regions on the supporting frame, which could potentially fail while in operation.Energy performance was simulated for five years of operation using Matlab Simulink® software. This simulation was based on the use of three different data. The first is a five-year weather database of the City of Tshwane in South Africa. The second is a hot water consumption profile for a typical household. The third is the cost of additional heating with electricity depending on the time of use. This simulation allowed the validation of the choices of the different elements of the heating system.This study allowed the development of an approach for the design of a solar heating system by optimising the dimensions of the different elements for a typical household and a specific region.In addition, the use of polymeric materials and other materials like polyurethane, salt and aluminium is possible for the development of a hot water storage tank based on their inherent properties.Extending the findings in this thesis will further improve the designs for solar concentrator technologies and solar water heating systems. Therefore, some recommendations and suggestions are highlighted in order to improve the overall system design, analysis and performance
Nolte, Henriette C. "Analysis and Optimisation of a Receiver Tube for Direct Steam Generation in a Solar Parabolic Trough Collector." Diss., University of Pretoria, 2014. http://hdl.handle.net/2263/45965.
Повний текст джерелаDissertation (MEng)--University of Pretoria, 2014.
tm2015
Mechanical and Aeronautical Engineering
MEng
Unrestricted
Mohammed, Hussein A. Mohammed. "Heat Transfer Enhancement in a Parabolic Trough Solar Collector (PTSC) Using Passive Technique and Nanofluids/ Hybrid Nanofluids." Thesis, Curtin University, 2021. http://hdl.handle.net/20.500.11937/87667.
Повний текст джерелаNyberg, Fanny. "Evaluation of Convection Suppressor for Concentrating Solar Collectors with a Parabolic Trough." Thesis, Umeå universitet, Institutionen för tillämpad fysik och elektronik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-148543.
Повний текст джерелаAbsolicon Solar Collector AB I Härnösand, Sverige, utvecklar koncentrerande solfångare med ett paraboliskt tråg. I solfångarens tråg uppstår termiska förluster som en följd av konvektion. En konvektionsreducerare tillverkades och användes som metod för att minska de termiska förlusterna i tråget. Målet med projektet var att testa och utvärdera konvektionsreduceraren för koncentrerande solfångare med ett paraboliskt tråg samt dess inverkan på verkningsgraden i två olika positioner för tråget, horisontell och lutande. För att kunna mäta konvektionsreducerarens inverkan på solfångaren mättes först solfångarens prestanda utan konvektionsreduceraren i de två olika positionerna, detta resultat användes som referens efter validering. Valideringen gjordes genom att resultatet jämfördes sedan med två andra prestandamätningar (quasi-dynamical test) av solfångaren gjorda av två olika institut, Research Institute of Sweden och SPF Institut für Solartechnik (Schweiz). Därefter, när konvektionsreduceraren var tillverkat och testad i de olika positionerna på samma sätt som mätningarna utan konvektionsreducerare, jämfördes resultaten med och utan konvektionsreducerareet samt att en utvärdering gjordes av dess inverkan. Resultatet visade en signifikant förbättring av solfångarens prestanda i form av minskade termiska förluster när konvektionsreduceraren användes och därav ökad verkningsgrad.
Usta, Yasemin. "Simulations Of A Large Scale Solar Thermal Power Plant In Turkey Using Concentrating Parabolic Trough Collectors." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612800/index.pdf.
Повний текст джерелаs in Kramer Junction, California. The CSTES consists of a PTC loop that drives a Rankine cycle with superheat and reheat, 2-stage high and 5-stage low pressure turbines, 5-feedwater heaters and a dearator. As a first approximation, the model did not include significant storage or back-up heating. The model&rsquo
s predictions were benchmarked against published data for the system in California for a summer day. Good agreement between the model&rsquo
s predictions and published data were found, with errors usually less than 10%. Annual simulations were run using weather data for both California and Antalya, Turkey. The monthly outputs for the system in California and Antalya are compared both in terms of absolute monthly outputs and in terms of ratios of minimum to maximum monthly outputs. The system in Antalya is found to produce30 % less energy annually than the system in California. The ratio of the minimum (December) to maximum (July) monthly energy produced in Antalya is 0.04.
Filatov, Artem. "Concentrating Collector for Torsång District Heating System." Thesis, Högskolan Dalarna, Energiteknik, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:du-28539.
Повний текст джерелаCOCCIA, GIANLUCA. "Design, Manufacturing, Testing, and Mathematical Modeling of Concentrating Solar Systems: a Study Applied to Prototypes of Parabolic Trough Collector and Solar Box Cooker." Doctoral thesis, Università Politecnica delle Marche, 2017. http://hdl.handle.net/11566/245262.
Повний текст джерелаUse of solar thermal energy has to be sustained to reduce consumption of climate-changing fossil fuels. Thus, in this study two concentrating solar prototypes were designed and manufactured: a parabolic trough collector (PTC) and a solar box cooker. The PTC has a 90° rim angle and a concentration ratio of 19.89. The concentrator is a sandwich composite structure with high-reflectance aluminum foils applied on it. The receiver is a steel pipe painted with a selective coating. The tracking system is based on a solar-position computer program. Experimental tests were carried out with water and temperatures up to 85 °C. Thermal efficiency, incident angle modifier, and time constant curves were found. Results show that the thermal efficiency equation is comparable with that of other PTCs in literature. Experimental data were utilized to validate a simulation environment able to determine the yearly yield of PTCs. The simulation was carried out to evaluate the convenience in adopting metal-based nanofluids respect to the base fluid (water). Five inlet fluid temperatures and three mass flow rates were analyzed. Results show that only Au, TiO2, ZnO, and Al2O3 nanoparticles, at the lowest concentrations, present reduced improvements respect to water. The solar box cooker is a high concentration ratio prototype (11.57). The cooker has a cooking chamber with a glass cover on the top and is composed by two rows of booster mirrors. The prototype allows both an azimuth and a zenith manual orientation. Tests without load were carried out to evaluate the maximum cooker temperature. Tests with load, conduced using aluminum vessels containing a certain amount of water, were accomplished both with non-painted vessels and black-coated ones, and with one or two vessels. Additional tests were carried out with peanut oil. Using this fluid, temperatures higher than the water ones were achieved (> 200 °C) and results exhibited values comparable to those in literature.
Shah, Hassim. "Integration of solar thermal collectors in the dairy industry: A techno-economic assessment : A case study of Dubai." Thesis, Uppsala universitet, Institutionen för elektroteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-446212.
Повний текст джерелаMarchesini, Camilla. "Modelling and Verification of a Correction Factor to Evaluate the Efficiency of Solar Thermal Collectors with the Rapid Test Method." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/11741/.
Повний текст джерелаAndre, Michael Sean [Verfasser], Kai-Uwe [Akademischer Betreuer] Bletzinger, Riccardo [Gutachter] Rossi, Rainald [Gutachter] Löhner, and Kai-Uwe [Gutachter] Bletzinger. "Aeroelastic Modeling and Simulation for the Assessment of Wind Effects on a Parabolic Trough Solar Collector / Michael Sean Andre ; Gutachter: Riccardo Rossi, Rainald Löhner, Kai-Uwe Bletzinger ; Betreuer: Kai-Uwe Bletzinger." München : Universitätsbibliothek der TU München, 2018. http://d-nb.info/1161528733/34.
Повний текст джерелаBouvier, Jean-Louis. "Étude expérimentale d'une installation de micro-cogénération solaire couplant un concentrateur cylindro-parabolique et un moteur à cycle de Hirn." Thesis, La Rochelle, 2014. http://www.theses.fr/2014LAROS031/document.
Повний текст джерелаThe objective of this thesis is the experimental study of the energy performances of a micro combined solar heat and power (micro-CHP) unit. The prototype is composed of a solar parabolic trough collector coupled to a Hirn (superheated Rankine) cycle engine. The originalities of this project are the use of solar energy which is renewable and inexhaustible but intermittent, the direct steam generation with a reduced size parabolic trough collector (46.5 m²), the two axis tracking system and the coupling with an oil-free reciprocating steam engine. The first part of this study is focussed on the solar collector. Thermal performances under sunny and cloudy conditions are presented and the thermal efficiency is evaluated. The system dynamic is also investigated through the characterization of the inertia as well as a study of its response to perturbations. Then a control strategy is set up and validated. The second part deals with the characterization of the engine. Tests have been performed with a stable and variable heat source power. From these tests, an empirical model has been developed and used in a parametrical study. This study shows the significant influence of the pressure ratio and of the rotational speed on the efficiency of the engine. In the last part, global performances (efficiency, output thermal and electrical powers) of the entire micro-CHP unit are evaluated. Tests with controlled pressure and speed are presented. From operating maps established from an empirical model, a control strategy based on the use of a by-pass is set up and tested
Bannur, Suhas. "Design and Development of a Novel Solar Thermal Receiver." Thesis, 2016. http://etd.iisc.ac.in/handle/2005/4291.
Повний текст джерелаSalvestroni, Michele. "Development of a small-size parabolic trough collector: design and experimental test." Doctoral thesis, 2019. http://hdl.handle.net/2158/1221900.
Повний текст джерелаMing-EnYu and 余銘恩. "Studies of Latent Heat Thermal Energy Storage Material of Parabolic Trough Collector System." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/xve2ym.
Повний текст джерелаAvelar, Rodrigo Eduardo Blanco, and 羅瑞格. "Study on single glass evacuated tube collector with a U-shape parabolic trough concentrator." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/889mj9.
Повний текст джерела崑山科技大學
機械工程研究所
97
This master thesis constructed a device to investigate the advantages of the combination of two solar thermal power technologies. One of them is concentrating solar collectors called the parabolic solar trough concentrator which is often used where higher temperature heating is desirable, there are large thermal loads, or where there are limitations at the area available for installing solar collectors, due to its capability of providing more energy per unit of collector surface area. The other one is the evacuated tube collector, from which the glass evacuated tube and the fluid storage tank were employed to construct a device with thermosyphon circulation which requires no pumping. The use of expensive and high power consuming components was avoided thanks to a simple, versatile, economic and environmental friendly approach design. Two kinds of U-shape collectors were tested with different material surface, one where the collector was made of metalized acrylic mirrors with reflectance of 0.83, and the other, a film of silver adhesive tape with reflectance of 0.80. As solar concentrated power technologies have been employed, it is necessary to construct a tracking system. Here, one-axis tracking system with simple mechanical and electronic components was built. The mechanical part consists of frame holding the U-shape collector in place together with the chassis and a design producing a declination angle of 23o which can be adjusted manually if necessary. At the same time, this arrangement gave the model the axial mobility needed, powered by an electric low power consuming step motor which manages the focusing movement of the concentrator. The step motor is controlled by an electronic circuit mainly governed by a PIC microcontroller. The entire tracking system is powered by a battery that is being constantly recharged by a photovoltaic cell, making the prototype independent and versatile as it features its own power source. The experiments, performed with the above described prototype, showed that the concentrated solar power gathered by the two different kinds of collectors with an effective area of 68 centimeters long and 55 centimeters wide, focused along the evacuated tube could achieve low level temperatures on the heat removal fluid, water in this case, fast and efficiently, on a clear sky sunny day with an average solar energy reading of 800 to 1,000 W/m2 in Taiwan.
PRATESI, STEFANO. "Sviluppo di un coating per assorbitore solare con tecnologie low cost." Doctoral thesis, 2015. http://hdl.handle.net/2158/1015547.
Повний текст джерела