Heat pipe

Solar heat pipe to adapt with 47mm dia/1500mm length solar vacuum tube
or 58mm dia/1800mm length solar vacuum tube
Heat pipe details:
1) Material: T2 copper
2) Dimension:
a) heat exchanging end: 14mm diax1mm
b) body size: 8mm diax0.75mm
3) Heat output: >=100W,
heat exchanging end temp. >= 62.5 degree celsius under 70 degree celsius hot water(600mm deep).
4) Anti-freeze capability
the breakage les than 5% after 20times repeat freezing.
5) Medium: Mineral without toxicity
6) Ageing: efficiency reduced less than 5% after 5 years