... area suitable 4.ISO9001, CE solar copper Heat pipe vacuum tube solar thermal collector1. Features(1)High ... thermal capacity, and rapid heat exchange (1000 times of copper heat exchange rate), heat exchange rate is up ... 25 °C, within 5s, it will transfer heat;(3) Special “TJ”design, make higher operation ... to stop the system operation.(7) Heat pipe make heat transfers in one way, avoid heat backflow in ...