PRODUCT DESCRIPTION

Heat pipe solar vacuum tubes are a perfect combination of vacuum tube and heat pipe. Solar Evacuated Tube consists of the inner and outer tubes, which are cut and coated on the condition of high temperature. The inner tube is coated in the three target magnetron sputtering plating equipments which is the newest three target technology and intorduced from German. Using the coating material of argon and nitrogen aims at becoming three membranes Cu-SS-ALN. Then, melting the inner and outer tube together and evacuating empty in the vacuum machine. Evacuated tube is the core of solar water heaters.  Its performance lies on the coating technology, The three-target evacuated tube rises the heat more than 12%. 

PRODUCT FEATURE

a.  Excellent performance of absorbing, but low heat loss, Especially adapted to sever cold regions,(super heat preservation).

b.  Powerful resistance of burst and corrosion

c.  Reducing the fouling on the tube wall, keeping water clean.

 

Material: high borosilicate 3.3 glass.

Structure: all-glass double-tube co-axial structure.

Color: blue or purple golden.

Size: 47mm×1500mm, 47mm×1800mm; 58mm×1500mm, 58mm×1800mm, 58mm×2000mm; 70mm×2000mm, 70mm×2100mm.

Thickness: 1.6mm/2.0mm.

Warranty: 15 years.

High absorptance: 93%~96%(AM1.5).

Low emittance: 0.04~0.06(80°C±5°C).

PRODUCT STRUCTURE

The heat pipe used in solar collectors comprises two opper components, the shaft and the condenser. Prior to evacuation, the condenser is brazed to the shaft. Note that the condenser has a much larger diameter than the shaft, this is to provide a large surface area over which heat transfer to the heater can occur. The copper used is oxygen free copper, thus ensuring excellent life span and performance. Each heat pipe is tested for heat transfer performance and exposed to 250°C(482°F) temperatures prior to being approved for use. For this reason the copper heat pipes are relatively soft. Heat pipes that are very stiff have not been exposed to such stringent quality testing, and may form an air pocket in the top over time, thus greatly reducing heat transfer performance.

WORKING PRINCIPLE

1.The selective coating on the inner cover of the evacuated tubes converts solar energy into heat energy and transfers heat to the heat pipes by aluminum fins.

2.The liquid in the heat pipe changes into vapour which rises to the condenser.

3.The heat then passes through the heat exchanger and the vapour becomes liquid, returning to the base of the heat pipe.

4.The heat conducts to the heat transfer liquid (anti-freezing liquid or water) with a copper pipe.

5.This transference of heat into the liquid creates a continuous circulation as long as the collector is heated by the sun.

 

TECHNICAL PARAMETERS & SPECIFICATIONS

Name	CHAODA Solar Copper tube
Structure	All-glass double-tube co-axial structure with copper heat pipe
Glass material	High borosilicate glass 3.3
External Pipe Diameter & Thickness	Ø=47±0.7mm&=1.6mm, Ø=58±0.7mm&=1.6mm, Ø=70±0.7mm &=2.0mm,
Internal Pipe Diameter & Thickness	Ø=37±0.7mm &=1.6mm,    Ø=47±0.7mm &=1.6mm, Ø=58±0.7mm &=1.6mm,
Pipe Length	800mm, 1200mm, 1500mm, 1600mm, 1800mm,1900mm, 2000mm, 2100mm.
Coating layers	Cu/SS-ALN (H)/SS-ALN (L)/ALN
Coating method	Three target magnetron sputtering plation
Thickness	1.6mm/2.0mm/2.2mm
Specific absorption	as=0.93~0.96(AM1.5)
Emission ratio	Σh=0.04~0.06(80°C±5°C)
Vacuum tightness	P≤5.0×10-3Pa
Idle Sunning Property Parameters	Y= 260 ~ 300m². °C/KW
Solar Radiation for Obtaining a Preset Water Temperature	H≤3.7 MJ/ m²(Ø47), H=2.9~3.2 MJ/ m²; H≤4.7 MJ/ m²(Ø58), H=3.7~4.2 MJ/ m².
Average Heat Loss Coefficient	ULT=0.4~0.6W/ (m². °C)
Pressure-Endure Ability	0.6Mpa
Copper condenser	1mm thick, 14mm dia, 550mm length
Copper pipe	0.6mm thick, 8mm dia, 1700mm length
Aluminum fins	2 pieces
Resist cold	-30 centigrade degree
Resist high temperature	250 centigrade degree
Hail resistance	Ø25mm/ Ø40mm
Lifetime	15 Years
Color	blue or purple golden

 

TECHNOLOGICAL PROCESS

1. Raw glass material

2. Outer tube——for one end, pull a tail pipe by high temperature——install getter.

3. Inner tube——for one end, form a round heater by the temperature——clean and stoving——coated

4. Assemble the inner tube and outer tube altogether.

5. Seal the inner tube and outer tube and anneal/bake out

6. Exhaust and vacuumed

7. Baking away to form a mirror plane/face

8. Packaging

 

AUTHENTICATION CERTIFICATES

ISO9001:2008

CE

PRINCIPLE MARKET

Popular country: Europe, USA, Canada, Russia, Mexico, United Arab Emirates, Brazil, Korea, and etc.

 

PRODUCT APPLICATIONS

Solar water heater, solar heating system, solar collector system, manifold collectors system.

 

PACKING & CARTON DETAILS

Export standard carton, with safety foam in every carton.

58/1800mm tube: 10pcs/box, 15pcs/box.

47/1500mm tube: 15pcs/box, 20pcs/box, 24pcs/box.

 

Model	Quantity of tubes	Model	Size of carton	Cubic content (m³)
70mm×2100mm	8pieces	70mm*2100mm	2.18m*0.35m*0.19m	0.145
58mm×2100mm	10pieces	58mm*2100mm	2.17m*0.345m*0.17m	0.127
	12pieces	58mm*2100mm	2.17m*0.275m* 0.24m	0.143
	15pieces	58mm*2100mm	2.17m*0.345m*0.24m	0.179
58mm×1800mm	8pieces	58mm*1800mm	1.88m*0.28m*0.18m	0.095
	9pieces	58mm*1800mm	1.88m*0.22m*0.26m	0.108
	10pieces	58mm*1800mm	1.88m*0.34m*0.18m	0.115
	12pieces	58mm*1800mm	1.88m*0.28m*0.26m	0.137
	15pieces	58mm*1800mm	1.88m*0.34m*0.26m	0.166
	16pieces	58mm*1800mm	1.88m*0.28m*0.33m	0.174
47mm×1800mm	24pieces	47mm*1800mm	1.87m*0.325m*0.26m	0.158
47mm×1500mm	15pieces	47mm*1500mm	1.58m*0.28m*0.22m	0.098
	18pieces	47mm*1500mm	1.58m*0.34m*0.22m	0.118
	20pieces	47mm*1500mm	1.58m*0.28m*0.265m	0.117
	24pieces	47mm*1500mm	1.58m*0.325m*0.26m	0.134

 

ADVANTAGES

1. Highly efficient absorption of high performance with daily average effciency over 40%-50%.

2. Start up quickly heat pipe transfer the heat energy into the storage tank in one condition.

3. With stand pressure of 0.2Mpa,can be connected directly with city water pipe.

4. Highly heat absorber and less in heat losing.

 

Remarks:

Payment: For LCL/Sample order, the wooden box fee and inland transportation fee will charge for extra, we accept 100% T/T in advance;

For FCL order, we accept 30% T/T in advance, 70% balance is upon the copy of B/L.

 

Warranty: 15 years for the vacuum tubes; for solar glass vacuum tube, we will send 1% of all tubes as compensation for free.

 

Delivery time: within 3 days for sample order; within 12 days for standard container, within 15 days for OEM order;

 

Packing details:

If LCL/sample order, in order to avoid be broken in shipping, we will pack the tubes with wood box.

FCL Order: export standard carton, five layers hard paper carton with safety foam in every carton.

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