Engineering Design of Solar Water Pump System for Agricultural Irrigation

Engineering Design of Solar Water Pump System for Agricultural Irrigation


Based on years of experience, TPON summarized the engineering design of solar water pump systems for agricultural irrigation in this article, in order to maximize its use in the field of agricultural irrigation.

 the engineering design of solar water pump systems for agricultural irrigation

The solar water pump system for agricultural irrigation converts solar energy into electricity through solar cell modules and then drives the pump to raise the water from low to high for farmland irrigation or drinking by humans and livestock.

The solar inverter water pump system project can be built in areas with abundant solar energy resources, and modular construction or phased construction can be carried out according to capital or industrial development to realize automatic operation and low management costs. In order to maximize the use of solar water pump systems in the agricultural irrigation field, we must follow these reasonable engineering design steps.

1. Confirmation of water source

The nature of the water source and the water output is an important basis for the construction and investment of the pump system. The pumps used in different water sources vary greatly. Usually, the water source is located deep underground, so submersible pumps should be used. If the sediment content in the water is high, a sewage pump should be used.

When there are good water inlet conditions, single-stage and multi-stage centrifugal pumps can be used. One of the most important conditions for determining the water source is that the water source does not dry out during the dry season.

The water level of an ordinary pond has relatively small changes, but it is necessary to confirm the minimum water level and the water depth when it is dry. For deep wells, it is necessary to determine the well depth, well diameter, water level, movement water level, and water output. For rivers, it is necessary to determine the lowest water level in the dry season, the water depth, and the highest water level in the flood season.

2. Confirm with water

The water standards for drinking water for humans and livestock and irrigation water for crops should be determined according to actual conditions. It must meet current needs, not waste, but also consider the needs of the latest developments, and most importantly, it must act according to the funding situation.

3. Selection of solar inverter water pump

The pump should meet the requirements of system lift and flow. At present, centrifugal pumps (including various self-priming pumps, pipeline pumps, and submersible pumps, etc.) are suitable for use as solar inverter pumps. They have the advantages of high efficiency, low price, and the lowest future operation and maintenance costs.

4. Selection of photovoltaic modules and construction of the phalanx site

The photovoltaic array is the power core of the entire system. The model selection and configuration of photovoltaic modules are the main factors that determine the cost performance of photovoltaic module systems. According to the solar cell's light intensity temperature characteristics and life cycle performance evolution characteristics, it is a fairly reasonable configuration to increase the capacity of ordinary photovoltaic modules by 1.3 to 1.6 times the power required by the pump motor.

The specific value must be determined according to the lift and pump model selection. The photovoltaic array needs to be installed in a place with a stable foundation and good sunshine. The layout of the photovoltaic sub-array should be based on the terrain to minimize land occupation.

5. The choice of solar water pump inverter

Solar water pumps are different from traditional AC grid-powered water pumps. Since the electrical energy generated by the photovoltaic module is direct current, it is necessary to convert the direct current into alternating current so that the water pump can be used by the inverter. Then, the solar water pump inverter should choose a special pump for photovoltaic water pump with high reliability and high system efficiency.

The capacity of the solar water pump inverter must meet the heavy-duty start-up requirements of the selected water pump. If it is used in highland areas, the capacity reduction caused by high altitude must be considered to ensure the long-term reliable operation of the system. Under normal circumstances, the power of the PV pump inverter must be one level higher than the power of the water pump motor.

6. Piping design

Ordinary photovoltaic pumps can be considered to run at full power for 5 hours on a sunny day. The piping design must be able to meet the flow requirements. Generally, the pipe resistance should not be greater than 5%. In addition, it is necessary to pay attention to the pressure resistance of the pipeline. General galvanized pipes can only withstand a pressure of 10 to 15 kilograms, so seamless steel pipes should be used.

7. Reservoir design

For human and livestock drinking water projects, the volume of the high-level pool should be able to meet the water output for at least 3 to 5 days a day, and the elevation must meet the requirements of being able to flow to all households. For crop irrigation water, the larger the pool, the better.

For example, if you need to water for one to two months during the dry period of a year, and do not use the equipment during idle time, it is recommended to pump the water into the water tank 3 to 5 months in advance.

The reservoir used for irrigation water does not have very high requirements, and the reinforced concrete pool is not necessary. As long as there is no leakage, certain pools and ponds can be used. When the terrain is a relatively steep slope, one pool or several pools can be built on the half slope with more irrigated land.

The dispersed structure of the pool can also reduce investment, and more importantly, avoid landslide damage caused by the heavyweight of the large pool. The place where the swimming pool is built must have a stable geological structure and be able to bear the weight of the swimming pool after water storage.

If the solar water pump system wants to be better used in agricultural irrigation, we must strictly follow the above-mentioned engineering design and construction in order to make the solar water pump more rational and efficient.

With excellent R&D technology and high-quality products and services, TPON has quickly become one of the leading manufacturers of solar water pumps. We take the needs of our customers first, establish a strict quality inspection system and a comprehensive management team, and control the quality of our products in an all-around way. At the same time, we will also provide customers with effective solution technology and thoughtful one-stop service. If you want to buy our solar water pump, please contact us immediately!