Spiral elastic pipe bundle solar vacuum heat collecting pipe and vacuum heat collecting system

Abstract

The invention provides a spiral elastic pipe bundle solar vacuum heat collecting pipe and a vacuum heat collecting system. The spiral elastic pipe bundle solar vacuum heat collecting pipe comprises an outer pipe and an inner pipe; the inner pipe is sleeved with the outer pipe; a vacuum cavity is formed between the outer pipe and the inner pipe; a heat exchange pipe is arranged in the inner pipe; the space between the inner pipe and the heat exchange pipe is filled with a phase-change material; the first end of the inner pipe and the first end of the outer pipe are sealed; the second end of the inner pipe and the second end of the outer pipe are connected through a sealing connecting piece; the heat exchange pipe is a spiral elastic coil pipe; and from the first end to the second end, the spiral outer diameter of the heat exchange pipe becomes gradually larger. According to the spiral elastic pipe bundle solar vacuum heat collecting pipe and the vacuum heat collecting system, a conical spiral elastic pipe bundle structure is firstly adopted as the heat collecting pipe, a conical spiral elastic pipe bundle and the phase-change material are combined together, and the conical spiral elastic pipe bundle has the characteristics of being uniform in space arrangement, light in mass and the like, so that the conical spiral elastic pipe bundle has good response to the phase-change material, larger disturbance can be produced, the heat exchange efficiency is improved, and vibration of multi-level frequency is motivated, and energy distribution is uniform.

Description

technical field [0001] The invention belongs to the technical field of solar heat collecting tubes, in particular to a spiral elastic tube bundle solar vacuum heat collecting tube and a vacuum heat collecting system. Background technique [0002] As one of the cleanest energy sources, solar energy has received more and more attention and application in today's serious environmental pollution. However, due to the limitation of natural conditions such as seasons, day and night, and the influence of random weather factors such as cloudy, rainy and snowy, the solar irradiance is scattered and intermittent, which increases the difficulty of large-scale application. In order to make solar energy a continuous and stable energy source, it is necessary to store solar radiation in sunny days for use at night and in rainy days. Phase-change heat storage materials use the phase-change heat generated during the phase change process to store and utilize heat. They have the advantages of ...

AI Technical Summary

Problems solved by technology

The disadvantage of this technology is that the heat exchange area between the simple U-shaped heat exchange tube and the phase change material is small, and the heat exchange efficiency is low.

Images