TECHWIN
TECHWIN
Best Quality and Advanced Technology for our Customers
Buoyant Material for Floating Photovoltaic System
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Eco frame buoyancy structure
Introduction to energy business
- Buoyant material production and sales
- EPC business
Floating photovoltaic power plant business
- Domestic EPC: 9MW commercial operation + 23MW licensed and permitted, preparation for construction
- Export: 4MW (Belgium, Australia, Japan, Singapore, etc.)
| Manufacturing plant | Factory view (Size of 20,000 square meters) |
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| Head count 20 persons Production quantity 400MW/year (April 2019~) |
Natural disaster & disaster stability
Durability to ultraviolet rays
- 20 year life verification completed in 2017
＊ UV durability experiment implemented at Japanese laboratory - Prevention of hardening by adding 3% of special UV stabilizer
- 20 year life verification completed in 2017
Stability when in contact with water bottom in dry season
- dredging construction/ 1/8 of frame type buoyancy structure compressive load in response to drawdown in farming season
＊Our company 15kg / frame type 120kg
- dredging construction/ 1/8 of frame type buoyancy structure compressive load in response to drawdown in farming season
Safety against heavy snowㆍfreezing
- Experiment result
15℃ below zero, ice thickness 25cm : no damage and deformation of buoyancy structure
Snowfall load : 0.78kN/ ㎡ (amount of snowfall: 55cm)
- Experiment result
Safety against typhoon & wave height
- Experiment result
wave height: strength maintained at 93% of 360,000 times
typhoon: stability proven at 210km/h
＊France ONERA laboratory
- Experiment result
Preventing corrosion & safety against concentrated load
Buoyancy structure
- eco-friendly high density polyethylene with strong corrosion resistance, corrosion resistance ensured against salt water, hardening prevented by adding 3% of special UV stabilizer
Clamp and catenary cable :
- oxide coated aluminum & stainless steel applied → corrosion resistance and durability enhanced
Connecting pin
- reinforced polypropylene material applied, about 14,000 connecting pins used based on 1MW , designed load designed within standard of 1,000kgf/EA ㆍLowest determined load 1,300kgf/EA based on 10℃ below zero
Catenary supporting base (supporting buoyancy structure & catenary cable)
- designed based on design load of 2,000kgf/EA
- ＊ designed as crack load of 4,500kgf/EA based on computer simulation
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Stability & quality guarantee of mooring device
1. Exact southbound direction maintained despite change in maximum water level
- Change in water level + excess water level (1~1.5m)
- Design and construction with anchor mooring angle 30 degree or less
- Easily recovering structure after touching bottom of reservoir
2. Quality guarantee
- Quality guarantee for Techwin buoyancy structure is provided for 15 years.
- Expected life of buoyancy structure is 25 years or longer
3. Wind tunnel experiment/CFD analysis by France ONERA laboratory
- By combination of wind tunnel experiment+computer flow analysis
- Wind tunnel coefficient calculation & design is applied
- Durability against typhoon : 210km/h (58.3m/sec)
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4. Earth anchor constructed which is directly fixed to the floor
- concrete heavyweighted item X → concern on maintenance & environment X
- Risk of collision with water surface structure in case of low water level X
- Anchor of more than 1 times of total resistance needed to be purchased
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Weight pendulum method
- Concrete heavyweighted item O → concern on maintenance & environment O
- Risk of collision with water surface structure in case of low water level
- Heavyweighted item of 1.7 times of total resistance required ＊In case of 2~3 grade wave zone, chain and anchor installed
Domestic performance
- 9MW system connected commercial operation at 8 sites
- 23MW construction works have been licensed, permitted and in progress at 9 sites
| Corrosion protection with Hot Dip Galvanization (ASTM 153) | ||
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Overseas performance
- 280MW commercial operation at 140 sites
- 95MW under construction at 145 sites
| Japan | ||||
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| OKEGAWA - 1,180 kWp | KATO-SHI - 2,870kWp | UMINOKI - 7,550 kWp | TANO IKE - 2,552 kWp | |
| EUROPE | ||||
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| SHEEPLANDS, UK - 200 kWp | POLYBELL, UR - 471 kWp | GODELY, UK - 2,991 kWp | PONTECORVO, ITALY - 343kWp | QE2, 6,338 kWp |
| AMERICAS | ||||
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| ORLANDO, USA - kWp (extension 900kWp) | KUNDE, USA - 10 kWp (exension 744 kWp) | MIRAFORES, PANAMA - 24kWp | ORLANDO UTILITES, USA - 32 kWp | PENOL GUATAPE, COLOMBIA - 99kWp |
| ASIA | ||||
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| O CHAN, SOUTH KOREA - 495 kWp | ULU SEPRI, MALASIA - 270 | AGONGDIAN, TAIWAN - 2,320 kWp | LIMORE, AUSTRAILA - 100kWp | AHUI CECEP, CHINA 70,005 |
- The largest size/number of designs, construction performance held all over the world
- Superior durability and stability against typhoon have been proven (2013~2018 Japan)
- World’s first installation at drinking water source (Thames River drinking water source, 6.4MW in U.K.)