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Solar energy is one of the main sources of energy for the future of mankind because it is inexhaustible and environmentally friendly. It is a trend to replace existing non-renewable energy sources. There are various kinds of solar energy products on the world today: solar cars, solar water heaters, solar energy air conditioners, solar cells, and so on. The application of Haiwell PLC in solar water heater is introduced now.
Solar System Overview
Solar energy is mainly composed of a solar energy conversion system, a heat storage system, and a constant temperature system. Solar energy is used to convert Dayang energy into thermal energy of water. By controlling the circulation pump operation through the temperature difference between cold water and hot water, the circulation of hot water is controlled to achieve the purpose of heating water. Some of the functional diagrams are shown above.
The advantages of the system
1, the sea is a simple analog programming, whether it is a current signal (4 ~ 20mA, 0 ~ 20mA) or a voltage signal (1 ~ 5V, 0 ~ 5V, 0 ~ 10V, -10 ~ 10V) or a temperature sensor signal ( Thermocouple, thermal resistance). No need to use the From or To instructions to read the value of each channel. When the amount of engineering is not used, the corresponding code value is unified to a code value of 0 to 32000; when selecting the quantity of engineering, the upper and lower limit code values ​​can be set, so that the corresponding AI can be directly read without writing a conversion program. value.
2, the sea is an intelligent fuzzy temperature control instructions, do not need to set any adjustable parameters can be achieved constant temperature control, reduce the technical staff to write programs and project debugging time.
3, the software's own simulation function can test the correctness of the compiled program, greatly improving the programming and debugging speed.
to sum up
The original system is mainly used temperature control table for constant temperature control and hot water circulation heating. Adopting Haiwell PLC as the core control device not only greatly improves the reliability, but also saves the cost. Regardless of its appearance and operability, it will be easier for customers to approve.