Height-adjustable single-droplet flash evaporation experimental device

Abstract

The invention provides a height-adjustable single-droplet flash evaporation experimental device which comprises a constant-temperature water bath box for providing constant-temperature water; a micro-injection pump which is connected with the constant-temperature water bath box through a water pipe; a stainless steel capillary tube lifting adjusting piece which is connected with the micro-injection pump through a water pipe; a stainless steel capillary tube which is connected to the bottom of the stainless steel capillary tube lifting adjusting piece; a flash chamber, wherein a stainless steelcapillary tube lifting adjusting piece is fixed at the top of the flash chamber; a flash chamber lifting adjusting piece which is connected to the flash chamber; a heating block which is arranged under the stainless steel capillary tube, wherein a red copper sheet is placed on the upper surface; a thermistor which is arranged on the red copper sheet and used for measuring the temperature of the hot surface, namely the surface of the red copper sheet; a heating controller which is connected with the heating block; a vacuum pump which is connected to the outer side of the flash chamber; a pressure sensor which is connected to the outer side of the flash chamber; a temperature sensor which is connected to the outer side of the flash chamber; a data acquisition instrument which is connected with the thermistor, the pressure sensor and the temperature sensor; and a computer which is connected with the data acquisition instrument.

Description

technical field [0001] The invention relates to a single droplet flash evaporation experimental device, in particular to a height-adjustable single droplet flash evaporation experimental device. Background technique [0002] When the surface pressure of the liquid suddenly drops below the saturation pressure corresponding to the initial temperature, the liquid changes from an initial stable state to a superheated state, in which the internal energy contained in the liquid cannot be stably converted into latent heat of vaporization, resulting in the instantaneous rapid evaporation of the liquid. The phenomenon is called flashing. Flash spray cooling is a new spray cooling method that applies spray cooling in a low-pressure environment and utilizes the huge heat absorption capacity of the liquid flash process to achieve enhanced heat transfer effects. Compared with the traditional spray cooling, the working medium of the flash spray cooling system has a higher degree of super...

AI Technical Summary

Problems solved by technology

In addition, the current research on the flash evaporation of a single droplet is basically the thermocouple suspension method. The droplet is stationary on the thermocouple, and the changes in temperature and size can be observed, but the droplet is stationary. In many fields, liquid Droplet flash occurs during motion, so it is of little practical significance

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