Comparison Of Joda Aerogel Blanket And Traditional Material
1. pipe vibration reduces the adiabatic effect of traditional Adiabatic Materials
The traditional inorganic insulation material insulation from inorganic fibers formed between the mm level space, the space is filled with air at room temperature, the air flow velocity in space is low, the heat convection speed is relatively low, but in a high temperature environment, air convection intensifies, thermal conductivity of traditional inorganic materials will increase rapidly.
More importantly, in the adiabatic structure of high temperature steam pipeline, the material of soft fiber structure is sunk due to pipe vibration, resulting in the failure of insulation structure. The main reason for the insulation effect of high temperature steam pipeline is weakened or even failed due to the low settlement of the traditional insulation materials, the increase of the density and the high thermal conductivity of the traditional inorganic materials at low temperature.
The adiabatic principle and traditional inorganic Joda aerogel insulation blanket different, this material is the chemical bond in the special process of the aerogel and the perfect combination of inorganic fiber, aerogel block filled the space between the fibers, the nano hole excellent insulating performance from the system in 90% (between left and right of the vast. Most of the size of nano 20-50 is far less than the air free path). Its tiny nano aperture enables a vacuum like pseudo vacuum state in the hole, which weakens the heat conduction between air molecules, and greatly reduces the air thermal conductivity of Joda nanoporous super insulation blanket.
In addition, the micro pore structure of high strength nano level, not on the surface pressure of the micro nano pore structure deformation and fragmentation, affecting the insulation effect (traditional materials under pressure the density increased with the increasing of the conductivity), so Joda nanoporous super insulation material is a kind of ignoring the best thermal density materials it is not only a low thermal conductivity, excellent thermal insulation and high structural strength.
Conclusion: Joda aerogel blanket has high tensile strength and ultra-low thermal conductivity. It will not reduce its service life and insulation capability under long term cold and heat alternation and low frequency vibration.
1. Improper selection of Adiabatic Materials
The test results show that the insulation structure of aluminum silicate, rock wool, glass wool, slag wool made of soft materials, the outstanding problem is the insulation material thickness is easy to slip, resulting in serious subsidence, at the top of the pipe insulation layer is very thin, the bottom is very thick, lose insulation function, causing the top heat loss of pipeline insulation seriously exceeded the national standard. Although there is no hard microporous calcium silicate above defects, but the aperture portion of the rigid insulation materials are difficult to process, high temperature pipeline thermal expansion and vibration after the joint gap increases, the gap part of the heat leakage is serious, the thermal conductivity of the insulation structure increases, the effect is not very ideal.
Joda aerogel blanket solved the collapse defects of the traditional soft insulation materials, and solved the defects of the hard material powder and the large heat dissipation in the gap. The excellent properties of Joda nanoscale super adiabatic materials determine their wide range of applications, which can be said to be alternative products of traditional materials.
2. Poor quality of protective layer and attenuation of hydrophobicity
Although the traditional insulation materials brush the hydrophobic agent on the surface to increase their hydrophobicity, in the harsh natural conditions, the surface hydrophobicity will soon be lost or weakened due to the expansion of materials and the vibration of pipes. The hydrophobicity of Joda aerogel blanket is the physical property of the material and the raw material, and its hydrophobicity will not decay in any condition.