Coil pipe type heat absorber with internal thread pipe

Abstract

The invention relates to the field of new energy, in particular to a coil pipe type heat absorber with an internal thread pipe. The coil pipe type heat absorber aims to solve the problems of complex control and high manufacturing cost due to the fact that a plurality of thermocouples and cameras are arranged when SolarSalt molten salt is solidified to cause freezing blockage or overtemperature decomposition dangers. By adopting the coil type heat absorber structure with the internal thread pipe, the number and the pipe diameter of the pipes required by a coil type water cooling wall can be adjusted by changing the horizontal inclination angle of the pipes while the flow speed in the heat absorber pipes is ensured, and a reasonable design value is obtained, so that the margin of safe operation of the heat absorber and the rigidity of a pipe panel are ensured; and the internal thread pipe is adopted to replace a traditional light pipe, the turbulent flow of fluid in the pipe can be greatly increased through internal threads, the convective heat release coefficient is increased, heat transfer is enhanced, and the pipe wall can be better cooled. In this way, each loop coil pipe absorbsheat evenly, the temperature of a fused salt outlet is even, meanwhile, heat transfer is enhanced, the pipe weight can be saved, and meanwhile the number of tube panel wall temperature thermocouplescan be reduced.

Description

technical field [0001] The invention relates to the field of new energy, in particular to a coil-type heat absorber with internal threaded pipes. Background technique [0002] At present, in the international and domestic large-scale tower-type photothermal power generation projects, the tube panels of the molten salt heat absorber are two parallel vertical tube coils, and the working fluid in the tube of the molten salt heat absorber is molten salt. At present, domestic and foreign solar thermal power stations The molten salt used is mainly SolarSalt molten salt (40% KNO 3 +60%NaNO 3 ), and its decomposition temperature is 593°C. When the temperature of the molten salt is lower than 260°C, the molten salt is easy to solidify. In order to better control the absorber tube panel and prevent it from freezing blockage or over-temperature decomposition, it is necessary to Thousands of wall temperature thermocouple measuring points are set on the heat sink tube panel, and more t...

AI Technical Summary

Problems solved by technology

In this way, not only the control is extremely complicated, but also the cost of the thermocouple and the camera is expensive. A coil type heat absorber with internal threaded pipe is proposed.

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