Measuring and calculating method for thermoelectric output performance of solar concentrating photovoltaic photothermal cogeneration system

Abstract

The invention discloses a measuring and calculating method for thermoelectric output performance of a solar concentrating photovoltaic photothermal cogeneration system. Photoelectric effect and photothermal effect for solar flow conversion are carried out on the same position on a photovoltaic module at the same time; an IV instrument and adjustable electric load are arranged in the solar concentrating photovoltaic photothermal cogeneration system; in case of realizing carrying out electricity generation and heat generation of the system simultaneously, working condition parameters are regulated by virtue of the system to obtain electricity generation power, heat generation power and auxiliary energy consumption of the system, and photoelectric efficiency, photothermal efficiency, overall efficiency, net photoelectric efficiency, net photothermal efficiency and net overall efficiency of the solar concentrating photovoltaic photothermal cogeneration system can be obtained more accurately by virtue of calculation; and the data results can be used as assessment basis for the thermoelectric output performance of the solar concentrating photovoltaic photothermal cogeneration system.

Description

technical field [0001] The invention belongs to the research field of comprehensive utilization of concentrated photovoltaic light and heat, and relates to a method for measuring and calculating the heat and electricity output performance of a concentrated photovoltaic light-thermal cogeneration system. Background technique [0002] According to the transmission of solar energy flow and auxiliary energy consumption, a typical solar concentrated photovoltaic cogeneration system consists of concentrators, photovoltaic modules, radiators, trackers and controllers. The transfer process of the solar energy flow is as follows: the tracker makes the solar concentrating photovoltaic photothermal cogeneration system track the sun's position, the solar energy flow is converged by the concentrator, and all the concentrated solar energy flow is irradiated on the photovoltaic module, and a part of the solar energy flow is in the photovoltaic module. The photoelectric effect is used to ge...

AI Technical Summary

Problems solved by technology

Therefore, in the solar concentrating photovoltaic photothermal cogeneration system, the photoelectric effect and photothermal effect that realize the conversion of solar energy flow are carried out at the same time on the photovoltaic module. The photoelectric effect outputs electric energy, and the photothermal effect outputs heat energy. The thermal energy output by the solar thermal effect is the total energy output by the solar concentrating photovoltaic photothermal cogeneration system. Therefore, it is accurate to use the sum of the output electric energy and the output thermal energy as the parameter for evaluating the output performance of the solar concentrating photovoltaic photothermal cogeneration system. However, in actual measurement, there are two measurement methods. The first method: when the photovoltaic module is not connected to the external load, the measured output heat energy is used as the total energy output by the solar concentrated photovoltaic photothermal cogeneration system; the second method: When the photovoltaic modules in the solar concentrated photovoltaic cogeneration system are cooled to the standard temperature, the output electric energy is measured, and the output heat dissipation medium temperature of the system is adjusted to a certain temperature to measure the output heat energy. Output total energy; since the first two measurement methods do not fully consider the photoelectric effect and photothermal effect of solar energy flow conversion at the same position and at the same time on the photovoltaic module, these two methods cannot accurately reflect the combined production of solar concentrated photovoltaics and heat. System output performance

Images