... 45 degree17, capacity optional: 100L,150L,200L,240L,300L18, working temperature: 90 degree19, cold resistance: -38 degree20, easy installation and ... Little capacity. The heat pipe starts to work fast at low degree. 2. Thermal conductivity working fluid and metal material commonly used ... tube gets minus 400º C for having good low-temperature-resistance. 4. Heat pipe owns super thermal conductivity with ...