Evaporator and heat absorber of separated gravity hot pipe

Abstract

It's a kind of evaporator of separating gravity heat pipe, which can make reflux condensed fluid in the hot pipe distribute uniformly on the evaporating pipe, and form falling film evaporation. The essentials of technological scheme are that the evaporator includes at least two evaporation tubes (1) and a upper header, and the part of the evaporation tube (1) in which there are liquid inlet holes (1.1) trends into the upper header (2), the upper ends of evaporators are the same height, so are the liquid inlet holes (1.1); outlet steam (2.1) and liquid inlet opening (2.2) are installed on the upper header; the openings of the evaporator (1) can be in its lower end, and all connect with sub-header; the evaporator (1) can be sealed in its lower end.

Description

Technical field [0001] The invention relates to an evaporator and a heat absorber of a separated gravity heat pipe, adopting a new structure, which can well solve the problem of evenly distributing the reflux condensed liquid of the separated heat pipe to the upper ends of each evaporation pipe to form falling film evaporation. Background technique [0002] The separated gravity heat pipe system has two or more evaporating tubes as the evaporating section, and the condensing section can be a single or multiple serpentine coils as the condensing section, and the steam rising pipe and the liquid return pipe are connected in the middle. [0003] According to the existing technical situation, according to the search, "separated heat pipe system (patent number CN98100172.6)", the condenser and the evaporator are arranged separately, and the condenser and the evaporator are connected by a steam riser pipe and a liquid return pipe. The main points of the technical solution are as fo...

AI Technical Summary

Problems solved by technology

The disadvantage of using this scheme is that the liquid working medium undergoes pool boiling evaporation in the lower half of the evaporating tube, and the upper half of the tube wall is not wetted by the liquid working medium and no phase change heat occurs, so the upper half of the evaporating tube cannot be fully utilized. heat exchange surface

There are defects in this patent: in the implementation process, possible small errors make the upper ports of the "channels" not at the same height, and the absolute values ​​of the areas of the liquid inlets of each channel immersed in the liquid are quite different, as shown in Figure 11, Figure 12, Figure 13, then, the absolute value of the liquid intake also differs greatly. During start-up or operation, it is possible that the lowest channel opening can discharge all the backflow liquid, while other channel openings have no liquid intake; in addition, the inlet of the "channel" The liquid port can only be on the inner side of the V-shaped groove, away from the heating surface, which is not conducive to heat transfer

The defect of this patent is that because the inlet temperature of the fluid in the "heat exchange tube" is lower than the outlet temperature, the condensed liquid work mass is large, resulting in a large amount of liquid entering the "heat collector tube" at the inlet position of the "heat exchange tube". The "heat pipe" enters the liquid unevenly, and the efficiency of the "heat collection pipe" cannot be exerted

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