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Performance of water in Glass Evacuated Tube solar water heater under Kenya Climatic Condition

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Computational water, Energy, and Environmental Engineering 2021年第2期10卷 37-48页

作者： Ernest Kyekyere Hiram Ndiritu Meshack Hawi Polline Mwambe Department of Mechanical Engineering Pan African University Institute for Basic Sciences Technology and Innovation Nairobi Kenya Department of Mechanical Engineering Jomo Kenyatta University of Agriculture and Technology Nairobi Kenya

solar water heaters which provide a cost-effective and environmental friendly approach to hot water generation are in widespread application. Evacuated tube solar water heaters perform better than flat plate solar water heaters as a result of their greater surface area exposed for sunlight absorption. water-in-glass evacuated tube solar water heaters are widely used as compared to heat-pipe solar water heaters due to their short payback periods. In this study, the performance of water-in-glass evacuated tube solar water heater is investigated through experiments under the climatic conditions in Kenya. The results revealed a daily efficiency range of 0.58 - 0.65 and a daily final outlet temperature greater than 55°C given an initial temperature of 25°C.

关键词： solar water heater water-in-Glass Evacuated Tube solar Collector solar Irradiation

Design of Scenery Complementary solar water heater Based cm Eddy Current Method

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International Journal of Technology Management 2014年第7期 27-30页

作者： Huang Tong Electrical and Electronic Engineering School North China Electric Power University Baoding 071003 China

This paper uses scenery complementary heating method to discuss a new type of scenery complementary water heater design. This product can be divided into two parts. The first part is the eddy current method wind power heating part, which is driven by wind power and vertical axis wind turbines and the design of magnet array rotor disc rotation, namely, magnetic field rotating, induced eddy current in the stator, so as to generate heat. The second part is the solar heating part. This works has broad market prospect, which provides a new idea for large-scaled heating method.

关键词： eddy current method scenery complementary solar water heater

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Low molybdenum ultra-pure ferritic stainless steel for solar water heaters

作者： Huo Zhicheng solar Energy Division of CAREI,Beijing 100083

This article illustrates the significance of popularizing solar water heaters in rural western regions,including the criteria for product selection and approach of *** further concludes that solar water heater has very market perspective in areas with rich solar resources,but it can also achieve good results even in areas with less solar resources like Sichuan.

关键词： solar water heater rural areas popularization

来源： cnki会议评论

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Baosteel Technical Research 2010年第1期4卷 19-24页

作者： YU Haifeng WANG Weiming YANG Jun LIU Quanli GAO Songchao WU Weiwei JIANG Laizhu GU Jinlei4 Stainless Steel Technology Center Research Institute Baoshan Iron ＆ Steel Co .Ltd. Shanghai 200431 China Stainless Steel Business Unit Baoshan Iron ＆ Steel Co. Ltd. Shanghai 200431 China Welding ＆ Surface Technology Division Research Institute Baoshan Iron ＆ Steel Co. Ltd. Shanghai 201900 China School of Materials Science and Engineering Shanghai Jiaotong University Shanghai 200240 China

In order to meet the demands of service life and the synthetical performance/price ratio of stainless steel in the solar water heater industry, the low molybdenum ultra-pure ferritic stainless steel （FSS） B445J1M was developed at Baosteel. In this study, comparative studies were carried out on the mechanical properties, the formability and the corrosion resistance of B445J1M ,304 and 444 ,and the advantages and application fields of B445J1M were summarized.

关键词： solar water heater low molybdenum ultra-pure ferritic stainless steel

Performance of U-tube solar water heaters Facing Different Directions

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Journal of Energy and Power Engineering 2013年第9期7卷 1729-1734页

作者： Ong Kok-Seng Tong Wei-Li David Cheong Universiti Tunku Abdul Rahman Jalan Universiti Bandar Barat Kampar 31900 Perak Malaysia Monash University Sunway Campus Jalan Lagoon Selatan Bandar Sunway 46150 Selangor Malaysia

System performance of solar water heaters depends upon collector and storage tank designs, solar radiation intensity and ambient temperature, amongst others. Evacuated glass tube collectors with U-tubes inside are less prone to leakages than the all-glass or the heat pipe types. U-tube solar water heaters suspended on walls and balconies could help overcome present day roof space restriction and increasing apartment-style housing. As such, their performance would depend upon its orientation when mounted in a vertical position. This paper reports the results of outdoor tests conducted on natural convection U-tube solar water heaters oriented towards different directions. Long and short term test procedures were employed to allow us to compare their performances as if they were tested simultaneously side-by-side.

关键词： solar water heater evacuated glass tube U-tube collector natural convection long and short term tests directional effects.

Performance investigation of solar thermal collector with auxiliary heater for space heating

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Journal of Central South University 2021年第11期28卷 3466-3476页

作者： Hassan BIGLARIAN Mohammad Mazidi SHARFABADI Mansour ALIZADEH Hossein GHARAEI Department of Energy Research Institute of Petroleum Industry(RIPI)TehranIran School of Mechanical Engineering Iran University of Science and Technology(IUST)TehranIran School of Mechanical Engineering College of EngineeringUniversity of TehranTehranIran

In this paper,the performance of a solar thermal system with a focus on space heating was investigated.A 70 m^(2) detached house was considered in the weather conditions of the city of Tehran,Iran.A thermosyphon solar water heater with a flat plate collector combined with an auxiliary electrical heater supplies the heating demand of the *** proposed system was modeled and analyzed using TRNSYS *** this regard,the TRNBuild module was employed for the building load *** model has been simulated for one year of *** effects of the solar collector’s surface area and storage volume were *** results show that for a solar collector with a 15 m^(2) surface area,the solar fraction is 0.29 in January,during which the solar radiation is the *** solar collectors of10 m^(2) and 5 m^(2) surface areas,the solar fraction falls to 0.23 and 0.14,respectively in ***,two cases of 150 L and 300 L storage tanks are taken into ***,it is found that using a 15 m^(2) solar collector and a 150 L storage tank can appropriately provide the building’ s heating demand taking the thermal performance and economic aspects into consideration.

关键词： space heating solar water heater thermosiphon solar collector TRNSYS software

Primary Function of Microcontroller EM78P458 and Research on Applications of Its ADC on Chip

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Wuhan University Journal of Natural Sciences 2000年第2期5卷 199-203页

作者： Huang Ji-wu Liu Yun-fei Xia Tian Chen Ding-wen College of Electronic Information Wuhan University Wuhan China Wave Electronic Corporation Wuhan China

The build-in structure of microcontroller EM78P458 and its application in supervising the water level of solar water heater are introduced. The circuit and the flow chart of AD conversion program are depicted. In the ... 详细信息

关键词： EM78P458 Microcontroller ADC solar water heater control of water level