Solartech solar water pumping system sold all over the world for desert control and farmland irrigation and others areas.

1. Projects recommendation: desert control & pumping trickle irrigation system for highway
1. Situation
Introduction: China economy is in rapid development at the same time also faces
enormous environmental challenges. The northern desert is one of many issues. Most
northern areas of China are in desertification, serious desertification affects not only the
transportation line running stability and normal usage period, but also has the serious
influence to the environment of the surrounding areas especially Beijing.
The local government hopes that our company could help them with prevention and cure
of desertification, to create a ' Green Barrier ' which is a shelter forest to stop sands
expansion for human and economic activity in Beijing and northern areas.
In order to prevent wind erosion on highway, grass grids are usually used to ensure the
highway runs well at the initial completion stage. Such a project needs a lot of time and
labour, it costs extremely high. Therefore, creating a permanent forest along the highway
is the preferred choice,
Shenzhen Solartech Renewable Energy is a professional solar pumping system and
solar grid-connected system manufacturer, handling R&D, production as well as sales.
Doctor Xuzhen, our chief engineer , helped the government to design and create a solar
water pumping system for highway desertification protection in Hade district of Xinjiang
province in 2001. The system has been running steadily more than 10 years already. The
successful experience has proved that our system can completely meet the requirements
of forest creating along the highway in the desert, but without any pollution.
2. System
A Solartech solar water pumping system mainly consists of PV array, solar water pump
inverter and 3 phase AC pump, easy for use. In order to reduce the construction and
operation cost, to improve the reliability of the system, the system rejects storage battery
which could cause serious pollution to environment, storing water instead of electricity,
reducing the construction cost and maintenance cost.
Independent solar pumping system has a bright future in solving the remote areas of
drinking water for people and livestock, agriculture and forest irrigation. For an AC

2. electric motor driven pump, it requires an inverter to convert DC output by PV array into
three-phase AC. With MPPT application, adjust output frequency in real time according to
light intensity, to guarantee maximum output power. The system has the advantages of
simple structure, high reliability, good dynamic characteristic, low cost. So far, there have
been no similar products at home and abroad, our technology has already taken the
leading position in the world
Combination
a. PV array
The power source for system made of photovoltaic modules in series-parallel, absorbing
solar radiation energy and transforming it into electric.
b. Solar water pump Inverter
Control & adjust the system, convert DC into AC to drive the pump, adjust output power
in
real time through MPPT function.

3. c. Pump
The pump is driven by three-phase AC motor, drawing water from wells, rivers into water
tank or to irrigate directly. To meet the practical requirements and situation, the system
can work with different kinds of pumps, such as mixed flow pump, deep well pump, axial
pump, centrifugal pump.

4. 3. Project
Refer to the true data of the system established in Hade desert of Xinjiang province, as
well as the successful operating experience from the project built in Takemala desert of
Xinjiang, a couple of figures attached for reference too.
1. Solar pumping station design and construction
To solve the irrigation problem of a shelter forest in desert, we designed a solar pumping
system in capacity of 15KW, PS15000.
Specifications for PS15000 as follows:
total power of station 15KW
Head 85m specifications for PV
array
Flow rate 36m3/h open-circuit voltage DC 685V
working voltage DC 556V short-circuit current DC 28.8A
Start light intensity 410W/m2 operating voltage DC 556V
End light intensity 360W/m2 operating current DC 26.4A
Pumping time( per day) 6~7.5h floor area 200m2

5. Quantity of water 135 m2 Watering area 70 acre(46,200m2)
pumping (per day)
The system was established in 2001, static level of the well: 24m, dune height:45m,
water salinity: 28mg/L
Effects in 2003
Oasis in 2010
2. Planting effects
Based on the actual natural environment along the road in Tali Mu desert, plants
selecting should ask for more attention on the characteristics of salt tolerance, drought
resistance, cold resistance, high temperature resistance, wind erosion and sand burial.
According to research findings and successful experience, Calligonum, Tamarisk and
Haloxylon should be the best choice.
3. Irrigation compare
(1) Flood irrigation. Working on the range of 400 m3/acre，not good for desert.
(2) Trickle irrigation. Working on the range of 120m3/acre
(3) Infiltrating irrigation. Working on the range of 80m3/acre, 5-7days irrigation cycle,
small evaporation, get away from damage cased by human and mouse, 1/3 water saved
and 3 times longer for use compared with trickle irrigation
Economical benefits analysis
According to the statistical data in early operation period of four years, if the equipment

6. depreciation is scheduled to 20 years, watering desert forest costs about $7.8/acre and
$0.06/ square meters annually.
Meanwhile, as people know, desert plant roots always have symbiont which has a great
medicinal value, such as Cistanche. Combining sand-break creation and cultivation of
medicinal herbs will produce good economic benefits, and also be pretty good for
sustainability of a shelter forest
Conclusions
The solar water pumping system has been running in good condition over the years
with high stability and reliability, without any fault. Solar plants irrigation is very
successful, and has great popularization and application value, can completely replace
the traditional fuel pump and reduce maintenance cost, zero pollution to environment.
Shenzhen Solartech Renewable Energy Co.,Ltd
Web: http://www.solartech.net.cn/ http://en.solartech.net.cn/
Tel: 86-0755-8615 1888