solar vacuum tube

1. Excellent performance of absorbing, but low heat loss, Especially adapted to sever cold regions 2.CE,CCC,ISO

Working principle:

 

The selective coating on the inner cover of the evacuated tubes converts solar energy into heat energy and transfer heat to the heat pipes by aluminum fins. The liquid in the heat pipe changes into vapor which rises to the condenser. The heat then passes through the heat exchange and the vapor becomes liquid, returning to the base of the heat pipe, the heat conducts to the heat transfer liquid(anti-freezing liquid or water)via 8copper pipe. This transference of heat into the liquid creates a continuous circulation as long as the collector is heated by the sun.

 

Feature:

 

1. A perfect combination of the vacuum tube and the heat pipe

2. High heat efficiency: advanced heat transferring style of the heat pipe, excellent selective absorbent coating and perfect combination with high vacuum preservation

3. Wide appliance range: as the heat pipe has less heat capacity, it can be started quickly even under cloudy fine day and collect heat efficiency. It can work normally enev-30 below degree. As no water in the vacuum tube, it can effectively prevent lowing of the heat efficiency due to frost cracking or scaling

4. Each individual tube can work independently, and the whole machine can still work if individual tube is damaged. The service life of the heat pipe can be longer than 15 years

The unique connection between the heat pipe and the vacuum tube can ensure both sealing and replace of damaged glass vacuum tube.

Describe:

1) hard borosilicate 3.3 2)high efficient absorptive selective coating: SS-C/CU & AL/N 3)warranty gurranteed 10 years

Specification of all glass  selective coating solar tube:

The marerial of glass tube: hard borosilicate :3.3

The thickness of inner and outer tube of:1.6mm

Absorption coefficient: more than 93%

Absorptive coating :high efficient heat absorptive selective sputtering coating:

 SS-C/CU and AL-N/AL

Emission coefficient: less than 10%(8%)

Evacuated : less than  5*10-3pa

Stagnation temperature   220 degree Celsius

Hail resistance    25mm

Freezing resistance   -35 degree Celsius

	Size	Capacity(L)	Absorb area(m2)	20GP/40GP loading qty(pc)
Solar tube	47*1200	1.29	0.07	4200 / 8960
	47*1450	1.56	0.08	3360 / 7280
	47*1500	1.61	0.09	3360 / 7140
	47*1600	1.72	0.09	3220 / 6860
	47*1800	1.93	0.10	2940 / 6020
	58*1200	2.17	0.90	3000 / 6480
	58*1500	2.71	0.11	2400 / 5280
	58*1600	2.89	0.12	2280 / 5040
	58*1650	2.98	0.12	2280 / 4800
	58*1700	3.07	0.13	2280 / 4680
	58*1750	3.17	0.13	2160 / 4560
	58*1800	3.26	0.14	2160 / 4440
	58*1900	3.44	0.14	1920 / 4200
	58*2000	3.62	0.15	1920 / 4080
	58*2100	3.80	0.16	1920 / 3960
	70*1800	5.09	0.17	1500 / 3000
	70*2000	5.65	0.19	1300 / 2800
	70*2100	5.93	0.20	1300 / 2800

solar vacuum tube