In high latitudes or low temperature environments, when the ambient temperature of the system is below zero degrees Celsius, traditional heat pipes with water as the working fluid may be frozen out and not be able to operate normally, resulting in system performance varies. Methanol low temperature heat pipe is the solution for this scenario. The special designed heat pipe utilizes the physical properties of methanol and is capable to operate in the ambient temperature of -20 to 80℃. Even though the performance of heat transfer capability is worse than that of traditional water copper heat pipes (see HEAT PIPE MERIT TABLE), it keeps operating in the critical low temperature environment and ensure customers system runs correctly.