Device and method for testing absorbance by electric quantity method

Abstract

The invention relates to a device and a method for testing absorbance by an electric quantity method, in particular to a device and a method for continuously measuring the absorbance of an adsorbing agent, comprising an absorber, an evaporator / condenser, an absorber heating / cooling loop, an evaporator / condenser cooling water loop, a compressed air blowing system, a data acquisition and heater control system, an evacuation vacuum valve and a switching vacuum valve, wherein the absorber heating / cooling loop comprises a water pump, a constant temperature hot / cold water bath and a corresponding pipeline; the evaporator / condenser cooling water loop comprises a water pump, a constant temperature water bath and a corresponding pipeline; and the evacuation vacuum valve and the switching vacuum valve are arranged between the absorber and the evaporator / condenser. The device and the method have more favorable controllability of test condition, simple measurement method, low test cost and highermeasurement precision, are free from the restriction of environmental temperature and can simulate the absorbing environment of an adsorbing agent under the refrigerating condition, measure the absorbance on a liquid substance at the normal temperature by the adsorbing agent, obtain the absorbance of the adsorbing agent by the electric consumption of a heater, repeatedly carry out the measurementprocess and measure the circulating absorbance in the circulating process of absorbing refrigeration. The invention can be used for testing the adsorbing performance of various adsorbing agents for refrigeration.

Description

technical field [0001] The invention relates to a test device and method for the adsorption capacity of a solid adsorbent, in particular to a test device and a test method capable of continuously measuring the adsorption capacity of an adsorbent to a refrigerant under refrigeration conditions; it belongs to the technical field of solid adsorption refrigeration. Background technique [0002] The adsorption performance of solid adsorbent plays a vital role in the performance of solid adsorption refrigeration. The research on the adsorption performance of solid adsorbent is necessary for the application and development of adsorption refrigeration technology, and the adsorption of refrigerant (adsorbate) by adsorbent The size of the adsorption capacity is an important index to consider the adsorption performance of the adsorbent. Therefore, the accurate acquisition of the adsorption capacity of the adsorbent is the basis and premise of the solid adsorption refrigeration technolog...

AI Technical Summary

Problems solved by technology

The capacity law measures the adsorption capacity based on the relationship between gas volume and pressure. Generally, this method can only measure the adsorption capacity of adsorbents for gaseous substances at normal temperature, and it is difficult to measure the adsorption capacity of liquid substances such as water and methanol at normal temperature. The method is to calculate the adsorption amount according to the weight change of the sample before and after adsorption. This method has a small error in measuring high molecular weight adsorbate, but because the temperature sensor cannot touch the sample, it cannot accurately measure the temperature of the adsorbent. At the same time, this method also Unable to measure adsorption amount of adsorbent at non-room temperature

In addition, no matter the gravimetric method or the volumetric method, it is difficult to simulate and measure the adsorption capacity of the adsorbent on the refrigerant under refrigeration conditions.

[0003] Chinese patent (02134753.0) authorized a method and device for automatic measurement of thermodynamic and kinetic parameters of adsorbents. The adsorption capacity is calculated by measuring thermodynamic parameters. This measurement device can automatically and continuously measure multiple times, which is consistent with the actual The use environment is relatively close, but this method still belongs to the capacity method, and it is difficult to overcome the shortcomings of the capacity method

Chinese patent (200720045620.2) authorizes a continuous adsorption efficiency test device. The measurement method used in the device is gravimetric method, which can accurately measure the temperature of the adsorbent. Changes in dose quality

At the same time, none of these devices can simulate the change of the adsorption capacity of the adsorbent under refrigeration conditions, and it is urgent to develop a device and method for testing the adsorption capacity of the adsorbent that can overcome the above-mentioned technical deficiencies, has a simple structure, accurate measurement, and can simulate adsorption refrigeration conditions.

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