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evacuated tube
Sunna Solar Co.,Ltd.
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evacuated tube

Description:
All glass evacuated tubes are the key component of solar collectors. The evacuated tube is similar to a conventional Dewar flask and consists of two borosilicate glass tubes, a glass with high chemical and thermal shock resistance. The outer side of the inner tube is coated with a sputtered solar selective surface. This coated inner tube is closed at one end and sealed at the other end to the outer tube. The annular space between the outer tube and inner tube is evacuated to virtually eliminate heat loss by conduction and convection.
Sunna developed the rotary three-layering magnetron sputtering technology and used it to produce Double M-ALN cermets coatings tube which has the advantages of highest thermal efficiency(0.96) , lowest emittance rate(<=0.05/20°) and working effectively in the high temperature(350-400°) in contrast to the normal selective coating evacuated tube. The corresponding film structure is ALN / M-ALN (LMVF) / M-ALN (HMVF) / Cu.
LMVF: Low Metal Volume Fraction.
HMVF: High Metal Volume Fraction

1. Absorption layer
2. Ceramic anti-reflection
3. Metal infrared reflector
Advantages over normal vacuum glass tube:
1) Higher heat efficiency: 12% higher heat absorbent ratio than normal vacuum tube.
2) Resisting ageing and attenuation: Normal vacuum tube could have problems such as film ageing and attenuation under high temperature exposure(250 degree Celsius) for a long time while the three- target vacuum tube can endure high temperature of 400 degree Celsius, therefore the service life can be significantly prolonged.
Features:
High solar-thermal conversion and low heat loss
Stable advanced coating up to 380°
Long time warranty to 15 years
High level vacuum ensure operation under cold weather


Split Active closed loop system (SN-ACL)	Split Active open loop system	Solar collector (All Glass series)

Solar collectors Â (Heat pipe series)	Compact Solar water heaters (Pressure series-Close loop)

Category :	Solar
Related Searches :	evacuated tube , evacuated tubes
Country Of Origin :	China
Listing Type :	Sell
Brand Name :	SUNNA
Terms Of Sale :	FOB,CIF,CNF,EXW
Terms Of Payment :	T/T,L/C at sight
Minimum Order Quantity :	no requirements
Lead Time :	15 days
Contact :	JO WANG
Address :	New Industry Zone Lianyungang, Jiangsu, 222000 China
Telephone :	[86] (137) 75296166
Fax :	[86]

evacuated tube

Split Active closed loop system (SN-ACL)

Split Active open loop system

Solar collector (All Glass series)

Solar collectors Â (Heat pipe series)

Compact Solar water heaters (Pressure series-Close loop)

evacuated tube

evacuated tubes