2、 System composition
1. Photovoltaic array:
*Using high-efficiency monocrystalline silicon photovoltaic modules, the total power is about 10kW (considering system losses).
*Determine the component tilt angle and array arrangement based on local sunlight conditions and installation site.
*Equipped with auxiliary materials such as brackets, cables, connectors, etc.
2. Photovoltaic controller:
*Choose MPPT controller, track maximum efficiency, and improve power generation efficiency.
*The rated current should be greater than the maximum output current of the photovoltaic array.
*It has protection functions such as overcharging, overdischarging, overcurrent, and short circuit.
3. Water pump:
*Choose an efficient and energy-saving submersible pump or centrifugal pump with a rated power of 7.5kW.
*Select the appropriate model based on the head and flow requirements.
*The material needs to be corrosion-resistant and suitable for water quality conditions.
4. Energy storage system (optional):
*Configure lead-acid batteries or lithium battery packs to store excess electrical energy for use at night or on cloudy days.
*The battery capacity is determined based on the load power and usage time.
5. Inverter (optional):
*If an AC water pump is required, an inverter needs to be configured to convert DC electricity into AC electricity.
*The inverter power needs to be greater than the rated power of the water pump.
6. Monitoring system (optional):
*Configurable data collectors, sensors, etc., to monitor the real-time operation status of the system.
*Implement remote monitoring, fault alarm, data analysis and other functions.
3、 System Design
1. Estimation of power generation:
*Estimate the daily average power generation based on the local average sunshine hours and photovoltaic module power.
*Adjust the power generation based on factors such as system efficiency and dust obstruction.
2. Pump selection:
*Select the appropriate pump model based on the lifting height, flow demand, and water source situation.
*Calculate the head, flow rate, and power of the water pump to ensure compatibility with the photovoltaic system.
3. System configuration:
*Determine the number of photovoltaic modules, controller specifications, energy storage system capacity, etc. based on power generation, pump power, and usage time.
*Consider system scalability and reserve a certain margin.
4、 Installation and debugging
1. Site selection:
*Choose a well lit and unobstructed location to install photovoltaic arrays.
*Close to the water source to reduce pipeline length and head loss.
2. Installation:
*Install photovoltaic modules, brackets, controllers, water pumps, and other equipment according to specifications.
*Connect the cables to ensure correct and secure wiring.
3. Debugging:
*Check if all components of the system are connected correctly.
*Power on debugging and testing the system's operational status.
*Adjust controller parameters to optimize system performance.
5、 Operation and maintenance
1. Daily maintenance:
*Regularly clean the dust on the surface of photovoltaic modules.
*Check the operation status of each component of the system, promptly identify and handle faults.
2. Regular maintenance:
*Conduct a comprehensive inspection and maintenance once a year.
*Check the performance of the battery and replace it if necessary.
6、 Advantages of the plan
1. Environmental protection and energy conservation: using solar power generation, pollution-free, energy-saving and emission reducing.
2. Low operating costs: No fuel consumption required, low operating expenses.
3. Simple maintenance: The system has a high degree of automation and is easy to maintain.
4. Long service life: The lifespan of photovoltaic modules can reach over 25 years.
7、 Investment estimation
The total investment for the system is approximately * *. You can leave a message to consult a professional engineer * *, and the specific cost will be determined based on factors such as equipment selection and installation conditions.
8、 Conclusion
The 7.5kW photovoltaic water pump lifting scheme is technically mature and economically feasible, with good economic, social, and ecological benefits. The implementation of this plan will effectively solve the water problem and promote sustainable development.