Phase change heat storage type solar vacuum heat collecting pipe and vacuum heat collecting system

Abstract

The invention provides a phase change heat storage type solar vacuum heat collecting pipe and a vacuum heat collecting system. The phase change heat storage type solar vacuum heat collecting pipe comprises an outer pipe body and an inner pipe body, the inner pipe body is sleeved with the outer pipe body, a vacuum cavity is formed between the outer pipe body and the inner pipe body; heat exchange pipes are arranged in the inner pipe body; the space between the inner pipe body and the heat exchange pipes is filled with a phase change material; and the heat exchange pipes are heat exchange coil pipes which are elastic pipe bundle coil pipes. The phase change heat storage type solar vacuum heat collecting pipe provided by the invention has the advantages that the problems of dispersibility and indirectness of utilization of solar energy are effectively solved, the heat conductivity coefficient of the phase change material is increased, the heat exchange efficiency is improved, the safety and stability are achieved, and the service life is long.