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

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利用太阳光和太阳能热能，如光伏/集热器（PV/T集热器）。从这个角度来看，世界上建造了使用各种PV集热器的系统。在这些集热器中，太阳能电池设置在收集太阳热能的吸收器上。因此，尽管太阳能电池的温度低于仅使用太阳能电池板时的电池温度，但太阳能电池的温度仍升高至热能使用的理想温度。为了在标准条件下保持电池转换效率，有必要将电池保持在较低的温度。在这项研究中，通过火用分析评估从PV/T收集器获得的电能和热能。在此评估的基础上，本文提出了通过收集太阳热能来不降低电池转换效率的方法。此外，本研究还试图提供有关矩形风管与上部加热相结合的传热问题的基本信息。下冷却壁为层流，通过其上宽壁以恒定热流密度加热，而另一壁则以恒定温度冷却。得到以下结果： (1)传热表面的传热系数、上下壁温度及风道倾斜度的影响角度被清除以增加该角度。 (2)对于风道焓和上壁温度，内部自然对流增加了加热比对上壁和风道倾斜角的影响。 (3)速度剖面上，上、下壁温差和风道倾斜角度对上侧速度的影响较大。

项目成果

鴨志田 隼司,冨士本 宜意,一色 尚次,片山 功蔵: "集光式ソ-ラ-コレクタの熱・光学的特性" 第28回日本伝熱シンポジウム.

Junji Kamoshida、Yoshii Fujimoto、Naoji Isshiki、Kozo Katayama：“聚光太阳能集热器的热和光学特性”第 28 届日本传热研讨会。