Heat Transfer and Simulation for Hybrid Photovoltaic/Thermal Solar Energy Conversion Systems.

混合光伏/热太阳能转换系统的传热和模拟。

• 批准号: 02650170
• 负责人: KAMOSHIDA Junji
• 金额: $ 0.64万
• 依托单位: Shibaura Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1990
• 资助国家: 日本
• 起止时间: 1990 至 1991
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-02650170/
• 关键词: Thermal Engineering Equipment; Hybrid Solar Collector; Energy Evaluation; Thermal Efficiency; Heat Transfer by Laminar Flow; Upper heating and lower cooling duct; 伝熱促進; エネルギ-関連装置; 層流境界層; Thermal Engineering Equipment; Hybrid Solar Collector; Energy Evaluation; Thermal Efficiency; Heat Transfer by Laminar Flow; Upper heating and lower cooling duct; 伝熱促進; エネルギ-関連装置; 層流境界層

One of most effective utilization methods of solar energy is to use simultaneously the sunlight and solar thermal energy such as Photovoltaic/Thermal collector(PV/T collector). From such a view point, systems using various kinds of P V collectors were constructed in the world.In these collectors, solar cell are set up at an absorber collecting solar thermal energy. Therefore, temperature of solar cell increases up to the desirable temperature of thermal energy use, although it is lower than the cell temperature when using only solar cell panel. For maintaining cell conversion efficiency at the standard conditions, it is necessary to keep the cell at lower temperature.In this study, electric and thermal energy obtained from PV/T collector is evaluated by exergy analysis. Based bn this evaluation, the method of not to decrease cell conversion efficiency with collecting solar thermal energy was proposed in this paper.In addition to, this study is attempt to present basic information concerning a heat transfer problems on rectangular duct combined with a upper heating and lower cooling wall for laminar flow, suffering from heating with a constant heat flux through its upper broad wall while the another wall being cooling with a constant temperature.The following results have been obtained : (1)For heat transfer coefficient of heat transfer surfaces, the influence of temperature between upper and lower wall and duct tilt angles are cleared as to increase that. (2)For duct enthalpy and upper, wall temperature, the influence of heating ratio to upper wall and duct tilt angles are increased by internal natural convection. (3)For velocity profile, the influence of temperature difference between upper and lower wall and duct tilt angles are affected to upper side velocity.

太阳能最有效的利用方法之一是同时使用阳光和太阳能热能，例如光伏/热收集器（PV/T收集器）。从这样的角度来看，在世界上构建了使用各种P V收集器的系统。在这些收集器中，太阳能电池是在吸收器收集太阳能热能的情况下建立的。因此，尽管仅使用太阳能电池板时，太阳能电池的温度高于热能使用的理想温度。为了在标准条件下维持细胞转换效率，必须通过Exergy分析评估从PV/T收集器中获得的电能和热能。在本文中提出了基于BN的基于BN的评估，在本文中提出了不降低细胞转化效率，收集太阳能能量的方法。此外，这项研究试图提供有关矩形管道上的热传递问题的基本信息，并在层状上加热和下部冷却壁，层流的较低冷却壁，与恒定的宽度隔热相同，在隔离壁上的恒定温度却是一个不断的隔离壁，而又有一个隔离壁，另一个壁是一个不变的壁，另一个壁是一个不变的壁，另一个壁是一个不变的壁。热传递表面的传热系数，上壁和下壁之间温度的影响以及导管倾斜角的影响以增加。 （2）对于导管焓和上部，壁温，加热比上壁的影响以及导管倾斜角的影响通过内部自然对流增加。 （3）对于速度剖面，上壁和下壁和管道倾斜角之间的温度差异受到上侧速度的影响。