Product Introduction:
Thermal piles is provided by Nanjing O' Deal Enterprise Co., Ltd,a major Energy Projects supplier in Service wholesale industry in China.You can check out the specification of Thermal piles below or get any optional result clicking into the following keywords thermal pile , Thermal piles , Description , Features , Details and you can check the authentications and testimonials of Thermal piles .
Description:
We successfully developed a new type heat pipe product in 2003 - Thermal piles (ZL 03221816.8) which were used in Qinghai-Tibet railway for consolidation of railway ground. The unstable permafrost in the Qinghai-Tibet railway ground melts in summer which lead to sinking of railway ground and coagul-
ates in winter which lead to bulge of railway ground. The inv-
ention of Thermal piles overcomes this trouble and such heat stick may be widely used in the project construction of expre-
ssway, bridge, tunnel, substation wherever there are prese-
nce of permafrost in the ground.
Heat dissipating fins are fitted on the upper part (conden-
ser section) of a thermal pile, and the lower part (evaporator section) of the thermal pile for absorbing heat is directly buri-
ed in frozen soil.
In the active frozen layer of permafrost for Qinghai Tibet Railway, during cold seasons and in the some time ( night or after sunset) of warm seasons, the ambient temperature is l-
ower than the temperature of the frozen ground surrounding the evaporator section of thermal pile, therefore the working fluid in the thermal pile would absorb the heat from the frozen ground, and evaporate into vapor; the vapor is driven by the pressure inside the thermal pile to rise to the condenser sec-
tion of the thermal pile, after contacting with colder pipe wall, it releases the latent heat of evaporation and condenses into liquid, which flows back to the evaporator by gravity for evap-
orating again. With such cyclic process, the heat in the frozen ground for the subgrade is brought out continuously to the a-
tmosphere. In summer, as the ambient temperature is higher than that of the underground frozen layer, and there is no wi-
ck inside the thermal pile, the working fluid cannot evaporate in the upper part of thermal pile, so heat can be transferred only via the pipe wall, and the heat in the atmosphere will not be conducted to the permafrost via the thermal pile. It is by t-
his feature of thermal pile for single direction heat transfer th-
at the permafrost layer underground is becoming thicker with increased strength, and this can effectively reduce the settle-
ment of railway with frozen ground as its subgrade during op-
eration.
