1. Solar Pumping System Introduction
1,Solar Cell Array
The solar array, an aggregation of many solar modules connected in series and in parallel, absorbs sunlight radiation and converts it into electrical energy, providing dynamical power for the whole system.
2,Solar Pumping Inverter
The pumping inverter controls and adjusts the system operation and converts the DC produced by the solar cell array into AC to drive the pump, and adjusts the output frequency in real-time according to the variation of sunlight intensity to realize the maximum power point tracking (MPPT). Advantages are as follows:
1). Patented dynamic VI MPPT algorithm ensuring swift response and stable operation
2). Digital control, automatic operation, data collection and storage for up to 8 years, etc; 98% conversion efficiency, complete protection
3). The system is free of any energy storage devices. Instead, the system stores water. As a result, reliability is improved dramatically comparing to systems requiring energy storage (battery) and at the same time greatly reducing construction and maintenance costs
Any three-phase pump is suitable for solar AC pumping system, pump powered by solar cell arrays draws water from the deep wells or rivers and lakes and pours into the storage tank or reservoir, or directly connects the irrigation system, fountain system, etc. According to the actual system demand and installation condition, different types of pumps such as centrifugal pump, axial flow pump, mixed flow pump or deep well pump can be used.
For Daily Life Water Supply For Agricultural irrigation
For Desert Control For Forestry irrigation
4.Project Case Analysis
Daily Water Supply and Agricultural Irrigation Solar Pumping System.
Project Location: Countryside of Kampala Uganda
Project Background: Uganda has abundant solar source where the sunshine time reaches 2957 hours per year and more than 8 hours per day averagely. Comparing to Solar energy, electrical energy has a big problem, the grid could cover few places, and the price of electrical gets higher. The price of diesel and oil reached the highest ever. In this situation, solar system will be government’s first choice.
Solution: Solar water pump was adopted for the project solving the daily water supplying and agricultural irrigation.
Economic Benefit: New solar pumping technology is adopted to reduce the carbon emission and save energy, no diesel,no maintenance, no bill on power supply, and no burden on farmers, and livings as well as farming are improved.The government saves capital on the power grid construction. The system generates power of 27375 kWh every year. During 25 years lifetime of our system it will save coal 257.3 tons; and reduce carbon emission 113.2 tons,sulfur dioxide 5.1 tons, dust 3.9 tons and lime ash 66.9 tons.
Social Benefit: A “renewable energy committee” was built by the local government for promoting the solar power pump.