Abstract

Results from experimental studies of a solar cogeneration system with linear photovoltaic modules of a fundamentally new design are presented. The Ʌ-shaped frontal walls are installed face-to-face at an angle to each other and mutually shield their own thermal radiation, which decreases the radiation heat losses by 27% compared with linear photovoltaic modules of the known designs. The photocurrent generated by cooled solar cells is directed to a system for charging chemical batteries and the thermal energy released is transmitted to the unconsumed intermediate heat-transfer fluid and then, through the surface of coil pipes of counter-current heat exchangers, to the consumed process water of the outer circulation circuit. The further transportation of thermal energy to the storage system occurs by natural circulation of the consumed process water through the temperature gradient formed by the control system over the height between the heat source, the heat exchanger, and the heat receiver, an insulated container (a heat accumulator). For the first time, efficient controlled transportation of heat has been implemented without using a circulation pump owing to the excess thermal energy released during the conversion of solar energy by the solar cells and a photo-selective film installed in the focal spot of the optical concentrator. Thus, a possibility of increasing the temperature of the heat-transfer fluids at the cogeneration system outlet has been offered. A two-circuit circulation system allows for separation of unconsumed heat-transfer fluids (antifreezing solutions) and the consumed fluid (the process water) by the pressure in the channels and installation of a linear counter-current heat exchanger that performs the functions of a supporting platform’s mechanical axis along the rotational axis of the optical concentrator. The system uses a dual-axis solar tracking concentrating system comprised of flat mirrors installed at an angle to the horizon. The arrangement of the Ʌ-shaped photovoltaic modules on the supporting framework in series along the heat-transfer-fluid path allows for a reduction in the overall dimensions of the channels, an increase in the total efficiency of the solar cells, and simplification of the encapsulation technology. A method for calculating the output of the cogeneration plant is provided. The method is based on the experimentally measured characteristics of silicon solar cells and heat losses in the channels of the linear photovoltaic modules.

中文翻译：

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带有太阳辐射集中器的热电联产厂

摘要

给出了从根本上是新设计的带有线性光伏模块的太阳能热电联产系统的实验研究结果。Ʌ形的前壁以一定角度面对面安装，并相互屏蔽其自身的热辐射，与已知设计的线性光伏模块相比，辐射热损失减少了27％。冷却的太阳能电池产生的光电流被引导到化学电池充电系统，释放出的热能被传递到未消耗的中间传热流体，然后通过逆流热交换器的盘管表面到达被消耗的外循环回路的处理水。通过在热源，热交换器和受热器之间的高度上，控制系统形成的温度梯度，使消耗的过程水通过控制系统形成的温度梯度自然循环，从而将热能进一步传输到存储系统，蓄热器）。由于太阳能电池和安装在聚光器焦点处的光选择膜在太阳能转换过程中释放的多余热能，因此首次无需使用循环泵就实现了有效的热量控制传输。 。因此，已经提供了提高热电联产系统出口处的传热流体的温度的可能性。两回路循环系统允许通过通道中的压力分离未消耗的传热流体（防冻溶液）和消耗的流体（工艺水），并安装执行逆流换热功能的线性逆流热交换器沿着聚光器旋转轴的支撑平台的机械轴。该系统使用双轴太阳跟踪聚光系统，该系统由与水平面成一定角度安装的平面镜组成。沿传热流体路径在支撑框架上串联布置Ʌ型光伏组件可以减小通道的整体尺寸，提高太阳能电池的总效率，并简化封装技术。提供了一种用于计算热电联产设备的输出的方法。该方法基于硅太阳能电池的实验测量特性和线性光伏模块通道中的热损耗。