Solar Desalination System Provides Clean Water

Witeam Commercial (Int’l) Limited

SOLAR DESALINAION SYSTEM
Clean & High Efficiency Background of Solar Application
Applicable for Shallow Surface Seawater, Deep Seawater, Waste Water, Hard ◙ Clean ◙ Safe Supply ◙ Efficient
Water, Brackish river Water, Beach Well Water etc. ◙ Independent ◙ Energy Conservative

1. Clean
By distillation with the solar energy, high
purity water shall be obtained by water
evaporation and condensation. Hence,
high-quality drinking water is very easily
available and more affordable than ever.
2. Safe Supply
For solar energy reaching to the earth one
day alone, could cover the world power
requirements for 180 years. Sun is the
only inexhaustible energy and reliable
Renewal of Water Resources & resource.
3. Efficient
Comprehensive Utility of Clean Energy By thorough recycling use of heat, it will
only take several minutes to produce
By utilization of clean energy - Ultra red solar optical technology, exploitation of
fresh water from preheating to
Vacuum distillation, and the comprehensive and sustainable renewable water
desalination.
resources integration system which combines water resources collection, solar
energy collection, desalination process, water treatment and distribution etc. in 4. Independent
one, we provide our clients with high efficiency, low consumption, reliable and With your own water supply system, you
endurable water supply system. are independent of public water quality.
Objective
5. Energy Conservative
We dedicated to supply of fresh water and clean water at far-remote and dry
95% energy consumption is solar energy,
areas, with an Operational Cost only up to 1/3 V.S. Reverse Osmosis (RO).
electricity is only used for driving of sun
Water Resources
tracking electromotor, pumping water by
We consider when various quality water can be used, how about the volume and
centrifugal pump, or water transmission
quality of the water, and will propose all kinds of technical solutions based on
from water pipelines by high pressure
local geographical conditions, to design the clean energy-solar energy
pump, which is with very low power load
desalination and purification system to the maximum extent.
and saving energy dramatically. Solar
Drinking Water
electricity system is optional with certain
We source various ways to reduce energy consumption, and maintain long
extra cost, i.e. totally without additional
period water supply.
external electricity supply is reliable for
Multiple Utility
solar desalination system.
It can be used for irrigation, gardening, swimming pool, flushing and bathing etc.
Multi-stage Treatment
After desalination process, the heat energy can be used for heating of swimming ----- Witeam Solar Energy
pool, hot bathing and industrial production of strong brine by condensation.
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Beijing Office: Tel: (86 10) 8627-5592; 8627-5625 Fax: (86 10) 5894 8640 E-mail: bj@witeamgroup.com
Hong Kong Office: Tel: (852) 6527 7869 Fax: (852) 3010 3483 Email: intl@witeamgroup.com
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http://www.witeam.com.hk

Introduction to the System
With vacuum distillation technology to realize desalination and
purification, solar energy collected are working as the power source for
desalination to produce fresh water. In vacuum environments, reduced
pressure condition is small; water purification objective can be realized
by separation of unpurified water in high temperature environment.

Main Features
1. By taking a series of technical measures, corrosion 4. Motive power consumption is low. Motive power
and sediment to the equipment are completely consumption for water delivery is very low in the low
avoided or delayed. temperature and multi-effect device, only hundreds of
2. Pretreatment of input seawater is much simpler. It volts electricity (for producing vacuum environment
is benefited from system operations under low and water suction pump) is required, solar electricity
temperature. The sea water is only required to be system is optional, power station facility is not
filtered by screen before flowing into the low required, which could reduce production cost greatly.
temperature and multi-effect device; no acid-adding 5. High heating efficiency. A 30℃ temperature
treatment is required like the multi-stage flashing difference could arrange 12 heat transfer efficiency
method, which saves a lot on additive agent. ratio, then, it would reach around 10 water production
3. Adequate surplus capacity. At noontime, water ratio.
production could reach 150% of the designed value; in 6. Safe and reliable operations. In the low
early morning and nightfall, water production can be temperature and multi effect system, vapors inside the
stabled at 50% of designed value. tube are to be condensed and the liquid film outside
the tube shall be evaporated, even there is leakage on
Desalination Tube the heat exchange tube as a result of pitting corrosion;
as the vapor side pressure is larger than the liquid film
side, high salinity water shall not flow into the
produced water. Such similar failures in RO are
avoided as the system adopts high reliable module
design, it is much safer.
The operational cost is very low, only around 5% of
the RO system, and there is no additive agent.
7. Close production system, well control for the flow.
8. Sensors are fitted behind of each solar collection
mirror of the solar desalination unit for auto sun
tracking, it is simple but practical.
9. The dimension of the production equipment is small, more suitable for large scale production.
10. The fresh water produced is pure water that is Meeting WHO drinking water standard for direct drinking.
11. All type of natural water source can be treated.
Seawater, Waste Water, Hard Water, Brackish river Water, Beach Well Water etc.
12. Solar Water Desalination System is applicable for household, island resorts, hotel, mining and factories,
community and large town etc. It is User Friendly!

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Principle of Solar Seawater Desalination System
1. Seawater collection;
2. Filtering ( through screen);
3. Sedimentation;
4. Preheating (preheating pool or glass house);
5. Heating (parabolic vacuum tube focusing & ultrared heating and ultraviolet sterilization, temperature would
reach 70-80℃);
6. Desalination (Rotate the parabolic mirror by focusing on the vacuum tank, the temperature would reach 100℃) .
Fresh water and high salinity seawater shall be desalinated;
7. Cooling down by exchanging heat (high salinity seawater shall pass the preheating pool via pipeline, and
cooling down by exchanging heat and preheat the seawater in preheating pool at the same time);
8. Export fresh water (the turbidity of the desalinated water is 0.5ntu, which meet WHO drinking water standard);
9. Discharge high salinity seawater
10. Application of high salinity seawater (distillation of heavy water D2O, KCl, NaCl etc.)

Comprehensive Performances Comparison
Parameter Solar Desalination System Reverse Osmosis
Energy consumption (kW/ton) 0.5 kW 5~9 kW
Installation area (m2/ton) 30 m² 0.1 m²
Three wastes (waste gas; waste
None Little
water; industrial residue) emission
Stability for water production Normal Good

Maintenance Simple Complex

Cost of pure water for 20 years US$ 0.80/ton US$ 8.00/ton

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Installation Suggestion and
After Sales Support
1. Installation & Operation Manual are available for household model only;
2. In addition, site survey of installation location and meteorological
conditions are required for large capacity model (Community model,
daily capacity 10,000 liters/day and above), medium capacity model
(factory model, daily 1,000 liters/day and above);
3. For mass production, shall need to visit accompanied by clients for
local civil water supply network;
4. After sales and support: free training of 2 persons only in the first year for large capacity model buyer. 10 years
spare parts availability for large and medium capacity models.

Products Specifications
1. Residential Household Model:
Description: Household use, easy installation and mobile design, only 12 m2 installation areas.

SWD-H100L
Fresh Water Output > 100 liters / day Collector Mirror Area 3 m2
Auto Sun Tracking Yes Collector Mirror Weight N/A Temporarily
Tracking Mode Electric Driven Solar Cell Dimension N/A Temporarily
Energy Collection Power > 2.5 W Regular Cleaning 7 days
Working Voltage DC 12 V Power Consumption Rate 100w
Water Feed Mode Manual Product Type Absorption collection
Self-Self-Suction Height 3m MTBF > 1 year
Auto Alarm Yes Life Cycle > 20 years
Feed Water Quality Category III Total Weight 100 kg
Meeting WHO drinking
N30 – S30 or Output Water Quality
Suitable Latitude water standard
Strong sunshine over 8 hours
Installation Area (m2) 12 m2

Packing List
Item Qty. Item Qty.
Collection Board 2 Ground Track 1
Fresh Water Tank 1 Bracket 1
Seawater Tank 1 Operational Manual 1
Vacuum Desalination Tube 1 Quality Certificate 1
Water Hose 10 m MINIMUM ORDER QUANTITY: 100 Sets
Note: Only 12V, 100W electricity supply is required. Actual output water may up to
Solar electricity system is optional with certain cost. 130% of designed value
US$ 1,480.00 / Unit
FOB China Price
(Not including the solar electricity system)

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2. Factory Model
Description:
Factory model is medium size fresh water system, suitable for
factories, enterprises, small communities. Latitude between N32’
to S32’, total installation area is 30 m2 for the rotating parabolic
mirror and the system while the fresh water production rate is 1
ton (1,000 liters). It can be expanded into 5 tons, 10 tons, 20 tons,
and 50 tons according to client’s request.

SWD-1T
Fresh Water Output > 1 ton / day Collector Mirror Area 31 m2
Energy Collection Power > 30 kW Regular Cleaning 7 days
Working Voltage AC 110 V / 220 Power Consumption Rate 650 W
Water Feed Mode Automatic Product Type Absorption collection
Self-Suction Height 3m MTBF > 1 year
Feed Water Quality Category III Total Weight 1,100 kg

Packing List
Name Qty. Name Qty.
Fresh Water Tank 10 Automatic Bracket 20
Water Hose 2,000 m MINIMUM ORDER QUANTITY: 10 Sets
Note: Standard 110V / 220V electricity connecting
Actual output water may up to
facility. And 12V electricity supply system and/or Solar
130% of designed value
electricity system is optional with certain cost.
1. Water to be desalinated/purified should up to local desalination water standard
(contents of salts not to be considered);
2. To be installed in plain area, the elevation shall be no more than 0.5m.
Technical Requirements:
3. Installation site shall be in good geological conditions, no slope, sink and swamp;
4. Height of the installation base plane shall be no more than 2 meters;
5. Solar electricity system is optional.
US$ 14,200.00 / Unit
FOB China Price
(Not including civil engineering & installation and solar electricity system)

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SWD-5T
Fresh Water Output > 5 tons / day Collector Mirror Area 165 m2
Working Voltage DC 110 V / 220 Power Consumption Rate 2.8 kW
Feed Water Quality Category III Total Weight 5.2 tons

Packing List
Name Qty. Name Qty.
Water Hose 10,000 m
Note: Standard 110V / 220V electricity connecting Actual output water may up to
facility. And 12V electricity supply system and/or Solar 130% of designed value
US$ 70,800.00 / Unit
FOB China Price

Preheating Tube Standard Unit
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SWD-10T
Working Voltage DC 110 V / 220 Power Consumption Rate 4.3 kW
Feed Water Quality Category III Total Weight 11 tons
Installation Area (m2) 1,700 m2

Packing List
Name Qty. Name Qty.
Water Hose 20,000 m
Note: Standard 110V / 220V electricity connecting facility. Actual output water may up to
And 12V electricity supply system and/or Solar electricity 130% of designed value
system is optional with certain cost.
US$135,000/ Unit
FOB China Price

Solar Collectors Array Desalination Water Irrigation

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SWD-20T
Working Voltage AC 220 V Power Consumption Rate 7.5 kW
Installation Area (m2) 3,500m2

Packing List
Name Qty. Name Qty.
Control Box 40,000 m
Note: Standard 110V / 220V electricity connecting Actual output water may up to
facility. And 12V electricity supply system and/or Solar 130% of designed value
US$ 265,000 / Unit
FOB China Price

Desalination Water Irrigation Solar Energy Collection Array

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SWD-50T

Fresh Water Output > 50 tons / day Collector Mirror Area 1,650 m2


Energy Collection Power > 1,650 kW Regular Cleaning 7 days

Working Voltage AC 220 V Power Consumption Rate 12 kW

water standard
Suitable Latitude Strong sunshine over 8
hours Installation Area (m2) 8,600 m2

Packing List
Name Qty. Name Qty.
Collection Board 1,000 Ground Track 500
Fresh Water Tank 500 Automatic Bracket 1,000
Water Hose 100,000 m
Note: Standard 110V / 220V electricity connecting facility. Actual output water may up to
And 12V electricity supply system and/or Solar electricity 130% of designed value
system is optional with certain cost.


1. Water to be desalinated/purified should up to local desalination
water standard (contents of salts not to be considered);
2. To be installed in plain area, the elevation shall be no more than
0.5m.
3. Installation site shall be in good geological conditions, no slope, sink
and swamp;

FOB China Price
US$ 785,000 / Unit
(Not including civil engineering & installation and solar electricity
system)

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3. Community Model
Description: Community model is
comparatively bigger desalination water
system; it is used for community, villages.
Latitude between N32’ to S32’, total Installation
Area is 5,000 m2 for the swivel parabolic mirror
and the system while the fresh water
production rate is 100 tons (100,000 liters).

SWD-100T
Fresh Water Output > 100 tons / day Collector Mirror Area 3,400 m2

Energy Collection Power > 3 MW Regular Cleaning 7 days
Working Voltage AC 220 V Power Consumption Rate 28 kW
N32 – S32 or Meeting WHO drinking
Output Water Quality
Suitable Latitude Strong sunshine over 8 water standard
hours Installation Area (m2) 20,800 m2

Packing List
Name Qty. Name Qty.
Collection Board 2,000 Ground Track 1,000
Fresh Water Tank 1,000 Automatic Bracket 2,000
Seawater Tank 1,000 Operational Manual 1
Vacuum Desalination Tube 1,000 Quality Certificate 1
Water Hose 200,000 m Video Surveillance System for 24 Hours
Note: Standard 110V / 220V electricity connecting
Actual output water may up to
facility. And 12V electricity supply system and/or
130% of designed value
Solar electricity system is optional with certain cost.
US$ 1,210,000 / Unit
FOB China Price

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4. Large Desalination System
Description: Large size desalination system
for water supply of towns, big factories etc.,
the daily production could reach 100 tons
/day (100,000 liters) above, shall make
systematical designing according to local
environments, geographical locations, and
water supply system etc.

Customer Information Feedback
1. Latitude;
2. Meteorological condition;
3. Daily production scale;
4. Coast basis (for pipeline installation of big scale application).

Notes:

1. All parameters may subject to modification with actual site conditions and to

be final confirmed when placing order；

2. The quotation is updated on August 3, 2010.

Witeam Commercial (Int’l) Limited
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Solar Desalination System Provides Clean Water

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