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Investigation of tungsten halogen lamp for possible usage as heat source for testing solar collector

Energy and Built Environment 2024年第4期5卷 517-528页

作者： Rapeepong Peamsuwan Pathiwat Waramit Ittipon Worapun Bundit Krittacom Tanakorn Phoo-Ngernkham Ratinun Luampon Department of Applied Physics Faculty of Science and Liberal ArtsRajamangala University of Technology Isan744Suranarai Rd.Nai mueangMueangNakhon Ratchasima 30000Thailand Department of Mechanical Engineering Faculty of Engineering and TechnologyRajamangala University of Technology Isan744Suranarai Rd.Nai mueangMueangNakhon Ratchasima 30000Thailand Department of Civil Engineering Faculty of Engineering and TechnologyRajamangala University of Technology Isan744Suranarai Rd.Nai mueangMueangNakhon Ratchasima 30000Thailand Development in Technology of Porous Materials Research Laboratory:DiTo-Lab Thailand

Artificial sunlight is a heat source in solar collector testing,where the light intensity and ambient conditions are controlled to provide uniformity in each *** this study,twenty-five tungsten halogen lamps of 300 W 220 V were investigated for possible usage as the heat *** experiment was conducted by varying the height of the lamps to the light field(H_(d)).The EN-12975-2 Standard was used to control the quality of the heat source on the light *** results showed that the average light intensity(I_(avg))decreased with an increase in *** H_(d) was low,the%uniformity values(%u_(xy))met the *** small light field area met the EN-12975-2 Standard better than the large area.A comparison of solar collector testing under a heat source from tungsten halogen lamps and natural sunlight was subsequently performed,and the experimental results were in accordance with the EN-12975-2 Standard.A single-channel flat plate solar collector was used as the test device and air was used as the working *** experimental results revealed that the solar collector thermal efficiency(η_(avg))trends were similar for both the heat source from tungsten halogen lamps and natural sunlight testing.A low%u_(xy) resulted in a𝜂avg that was more similar to that of natural sunlight.

关键词： solar simulator EN-12975-2 Standard Light intensity Uniformity value Thermal efficiency

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Efficiency enhancement of building multi-layer solar collector with SiO2–TiO2 hybrid nanofluids

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Building Simulation 2023年第10期16卷 1851-1862页

作者： N.N.M.Zawawi W.H.Azmi Z.A.A.Majid R.A.Rahim H.M.Ali Lebuhraya Tun Razak Centre for Research in Advanced Fluid and Processes26300GambangKuantanPahangMalaysia Faculty of Mechanical and Automotive Engineering Technology Universiti Malaysia PahangPekanPahang26600Malaysia Kulliyyah of Allied Health Sciences International Islamic University of MalaysiaBandar Indera Mahkota25200KuantanPahangMalaysia ECE Department Kulliyyah of EngineeringInternational Islamic University MalaysiaJalan GombakKuala LumpurMalaysia Mechanical Engineering Department King Fahd University of Petroleum and MineralsDhahran31261Saudi Arabia Interdisciplinary Research Center for Renewable Energy and Power Systems(IRC-REPS) King Fahd University of Petroleum and MineralsDhahran31261Saudi Arabia

Due to the depletion of conventional energy sources and its limitless resources,solar energy is currently being considered as a viable alternative,especially for water heating *** thermal performance of multilayer solar collectors for water heating systems can be improved further by introducing hybrid nanofluids as advanced *** study demonstrates the utilisation of hybrid nanofluids in heating systems by employing a multilayer absorber solar *** SiO2–TiO2 hybrid nanofluids at volume concentrations up to 2.0%were tested at various flow rates(1.7 to 3.7 LPM)and solar radiation intensities(250 to 1000 W/m2).The thermal performance of the solar collector was assessed by measuring the temperature variation,heat loss,and overall efficiency of the *** the optimal volume concentration,the temperature difference for solar collectors employing SiO2–TiO2 hybrid nanofluids increased *** optimal volume concentration of 1.5%yields a maximum temperature difference of 9.5°*** addition,the efficiency and fluid temperature of the solar collector containing hybrid nanofluids have been enhanced by 22%and 37%,*** SiO2–TiO2 hybrid nanofluids with the optimal volume concentration of 1.5%were therefore recommended for maximum efficiency in the solar collector.

关键词： solar collector hybrid nanofluids solar water heating system solar simulator thermal efficiency

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Thermal characteristics and thermal stress analysis of solar thermochemical reactor under high-flux concentrated solar irradiation

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Science China(Technological Sciences) 2020年第9期63卷 1776-1786页

作者： ZHANG Hao SHUAI Yong GUENE LOUGOU Bachirou JIANG BoShu HUANG Xing Key Laboratory of Aerospace Thermophysics of MIIT Harbin Institute of TechnologyHarbin150001China School of Energy Science and Engineering Harbin Institute of TechnologyHarbin150001China College of Metallurgy and Energy North China University of Science and TechnologyTangshan063210China

Nowadays, using a solar-driven thermochemical reaction system to convert greenhouse gases into high-quality liquid fuels has been proven to be an effective way to address the growing depletion of traditional fossil fuels. However, the utilization of highlyconcentrated solar irradiation runs the high risk of reactor damage issues resulting from thermal stress concentration, which seriously threatens the security and reliability of the total reactor system. In this study, the thermal radiation distribution and thermo-mechanical process in a volumetric reactor were numerically investigated by combining Monte Carlo ray-tracing method with computational fluid dynamics method. Based on the experimental results and thermal characteristic analysis, the formation mechanism of thermal stress concentration and the strategies of improving thermal stress distribution were discussed in *** simulation results indicate a great possibility of reactor damage at about 1000℃ operating temperature and 9.0 k W lamp power, which is well-matched with related experimental results. The ceramic damage typically occurs at the inner edges of the through-holes, including the aperture, the gas inlet, and the thermocouple hole, then extends along the lines connecting these holes and finally causes brittle fracture. By reasonable control of the opening direction and the distance between the throughholes, the maximum compressive stress can be reduced by 21.78%.

关键词： solar thermochemical reactor thermal/mechanical stress reliability assessment solar simulator heat transfer and flow characteristics

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Characterization of simulator and Relative Spectral Responsivity Measurements of Photovoltaic Modules with Band Pass Filter Technique

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Open Journal of Energy Efficiency 2022年第3期11卷 71-87页

作者： Meric Seval Bazkir Ozcan National Metrology Institute (TUBITAK-UME) Kocaeli Türkiye

One of the most important parameter used for the evaluation of the energy rating of PV modules is, their spectral responsivities which are the measure of electrical performance parameters per incident solar radiation. In this work, spectral responsivity measurements of a mono-crystalline, a poly-crystalline, a CIGS thin film and a bifacial module were measured using xenon-based flash type solar simulator system and a set of band pass filters. For the comprehensive characterization of parameters that may influence the spectral responsivity measurements, initially the simulator system was characterized both optically and thermally according to the IEC60904-9 and IEC60891 standard requirements. The optical characterizations in terms of spectral match, spatial non-uniformity and temporal instability indicate that the measured results (~3.0%, ~0.30% and ~0.20%) according to the IEC 60904-9 standard’s classification requirements correspond to A+A+A+ classes. Moreover, thermal characterizations in terms of the temperature uniformity show that over the 2 × 2 m area temperature uniformity of simulator system’s light distribution (1ºC) is almost two times better than the IEC 60891 standard requirements (±2ºC). Next, PV modules were electrically stabilized according to the IEC 61215-2 standard requirement’s (stability test) to reduce the fluctuations in their electrical performance parameters. Then, using the band pass filters, temperature controlled xenon-based solar simulator system and a reference PV module of the spectral responsivity of PV modules were measured from 400 nm to 1100 nm with 50 nm steps with relative uncertainty of 10-3 level.

关键词： Photovoltaic Modules Responsivity solar simulator Band Pass Filters

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