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Help CenterSolar Heat Pipe Vacuum Tube
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Specifications
Heat Pipe Vacuum Tube,1.Most efficient and good performance,
2.Anti-freezing
3.Especially for pressurized solar water system
Heat Pipe Vacuum Tube Technical Parameters
General Parameters |
Heat Pipe Parameters |
||
Models |
Φ47X1500mm, Φ58X1800mm |
Heat transfer substance |
mixer of some inorganic elements |
Glass material |
High borosilicate glass 3.3 |
Heat conducting wise |
from liquid to gas and corpuscles |
Wall thickness |
1.6mm |
Application temperature |
-40 ~ 400oC |
Diameter of condensor |
Φ14*65mm |
Axial thermal conductivity |
27.2 MW/M2 |
Vacuum tightness |
less than 5*10-3Pa |
Radial thermal conductivity |
145 KW/M2 |
Absorber material |
Aluminum fin |
Heat transfer efficiency |
≥ 95% |
Absorptive Coating |
Cu/SS-ALN(H)/SS-ALN(L)/ALN |
Equivalent heat conductivity |
6000-15000 times of pure silver |
Absorption coefficient |
≥90% |
Duration of element |
≥ 15 years |
Emission coefficient |
≤7.5% |
Stagnation situation |
No pipe crack |
Hail resistance |
Φ25mm |
Heat loss |
Fast no heat resistance |
Start up temperature |
≤25oC |
Compatibility |
Good compatibility with metal |
Features of Heat Pipe Vacuum Tube:
Solar heat pipe vacuum tube, there is anti-freeze liquid as heat-transferring medium in heat pipe which is hollow inside evacuated, by this design the water never goes into glass vacuum tube so the tube will never be broken in extremely cold weather, efficiency generated by heat pipe vacuum tube is about 55% in summer and 42% in winter more than that of normal glass vacuum tube, this type is especially for pressurized solar water heating system.
Performance of Heat Pipe:
1). High Thermal Conductivity, Heat conductivity of heat pipe is much higher than the common metal, from the above table, we can see that because it transfers heat inside heat pipe by gas and liquid phase, heat resistance is very small, so the axial heat conductivity is very high, while the radial heat conductivity is general.
2). Good Isothermal Performance, When heat pipe is working, the working fluid temperature inside it is saturation, the saturated working fluid temperature is the same, but it will absorb or release a lot of heat, therefore, heat pipe can transfer much heat under isothermal circumstances theoretically, whose outside behavior is the isothermal performance of heat pipe which is very good. The axial temperature of heat pipe is almost the same.
3). Reversibility of Heat Flow, a heat pipe with wick, if only the capilary force is enough, it will begin transfer heat, so that it makes the temperature of two ends tends to equal.
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