[Editor Introduction]: This article introduces a case of using NI CompactRIO to develop a distributed control and data acquisition system that can control all subsystems of a high-radiation flux solar furnace.
[Keywords]: data acquisition system; intelligent control of solar furnace; NI CompactRIO;
[Abstract]: Due to its location in the sun, Mexico is an ideal place to use solar energy technology. The average annual sun exposure in this area exceeds 5.5kWh / m2. The high-quality solar resources make the region ideal for implementing concentrated solar technology (CST), which can be used to generate electricity or produce solar hydrogen fuel.
Figure 1: Architecture diagram of solar furnace components
"With CompactRIO, Compact Fieldpoint and NI Compact Vision System's inherent robustness, accuracy, scalability, and network integration of the platform, we can develop a reliable, distributed application within project time limits."
-Roberto G. Galà n, Centro de Inves, TIgación en Matemá TIcas AC
challenge:
Develop a distributed control and data acquisition system that can control all subsystems of a high-radiation flux solar furnace.
solution:
Use NI LabVIEW graphical system design software, LabVIEW Real-TIme, LabVIEW FPGA and LabVIEW vision development modules, as well as NI CompactRIO, Compact Fieldpoint and NI Compact Vision System hardware platforms to develop high radiation flux solar furnace control and data acquisition systems.
Author:
Dr. Norberto Flores-Centro de Inves TIgación en Matemáticas AC
Roberto G. Galà n-Centro de Investigación en Matemáticas AC
Introduction
Due to its location in the sun, Mexico is an ideal place to use solar technology. The average annual sun exposure in this area exceeds 5.5kWh / m2. The high-quality solar resources make the region ideal for implementing concentrated solar technology (CST), which can be used to generate electricity or produce solar hydrogen fuel.
In order to promote the development of CST in Mexico, the CIE Energy Research Center built a high-radiation flux solar furnace (HRFSF). HRFSF makes it possible to use solar radiation in basic applied research and the development of industrial production processes. The main purpose of HRFSF is to develop thermoelectric solar tower components for central tower power plants. Another purpose is to process and manufacture advanced materials, and let them reflect the thermophysical, mechanical and optical material characteristics of exposure to sunlight.
We need a control and data acquisition system to operate all integrated components of HRFSF. The Industrial Mathematics Department of CIMAT (Mathematics Research Center) cooperates with CIE staff to jointly perform the task of developing control systems.
High-radiation flux solar furnace (HRFSF) components
The high-radiation flux solar furnace (HRFSF) is mainly composed of the following three components: a condenser, a heliostat and a shutter (see Figure 1). The condenser is the core of the system. Its function is to concentrate the solar radiation to a very high level, so as to reach a high temperature in the focusing area (up to 3000 ° K). The condenser is placed in a solar furnace and does not move; all movement required to track the sun needs to be performed by a heliostat. This is done to obtain a static focus area, which provides a more controlled environment for conducting experiments. The performance of the furnace depends on the ability of the heliostat to accurately track the sun. The shutter partially opens and closes at different angles, controlling the amount of radiation allowed into the system. It is worth mentioning that the HRFSF includes a heliostat with an area of ​​81 square meters, a shutter with an area of ​​42.2 square meters, and an optical condenser composed of a 409 hexagonal first surface polished glass mirror.
In addition to the above components, there is also a mobile platform for precise positioning of experiments at different points in the focused area. The data acquisition system is also used to monitor different experimental variables, such as temperature, pressure flow, solar radiation, and concentrated radiation flux distribution. Cooling system experiments are also necessary. In addition, the meteorological monitoring station is integrated into the system. Except for the heliostat, cooling system, and some solar radiation and wind speed sensors, all other furnace components are located inside the entire furnace structure.
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