Miniaturized ammonia water absorption refrigerator

Abstract

The invention relates to a miniaturized ammonia water absorption refrigerator, which mainly solves the technical problems of large size, heavy weight and the like of the refrigerator. The technical scheme is that: a plate-fin gaseous oxygen (GAX) absorber and a plate-fin cooling water absorber are arranged in a box body of an absorber of the refrigerator. The invention is suitable for various ammonia water absorption refrigerators.

Description

Technical field: [0001] The invention relates to a sorption refrigerator, in particular to a refrigerator which vaporizes ammonia from an aqueous solution as a refrigerant. Background technique: [0002] Ammonia is an ancient refrigerant, and the ammonia absorption refrigerator is the earliest refrigerator in the world. Due to its large volume, heavy weight, and low thermal efficiency, its application has been greatly restricted; in recent years , the earth's environmental problems have attracted great attention, mainly reflected in the destruction of the atmospheric ozone layer and global warming, while the ozone layer destruction coefficient (ODP) and the global warming coefficient (GWP) of the natural refrigerant ammonia and ammonia absorption refrigerators Both are zero, thus providing a great opportunity for the development of ammonia absorption refrigerators, such as oil refining, petrochemical, fertilizer, food processing and other industries, in the production proces...

AI Technical Summary

Problems solved by technology

[0002] Ammonia is an ancient refrigerant, and the ammonia absorption refrigerator is the earliest refrigerator in the world. Due to its large volume, heavy weight, and low thermal efficiency, its application has been greatly restricted; in recent years , the earth's environmental problems have attracted great attention, mainly reflected in the destruction of the atmospheric ozone layer and global warming, while the ozone layer destruction coefficient (ODP) and the global warming coefficient (GWP) of the natural refrigerant ammonia and ammonia absorption refrigerators Both are zero, thus providing a great opportunity for the development of ammonia absorption refrigerators, such as oil refining, petrochemical, fertilizer, food processing and other industries, in the production process not only need a certain cooling capacity, but also a large number of low High-grade waste heat discharge, the use of ammonia water absorption refrigerators can save a lot of energy, reduce production costs, and improve environmental conditions. In addition, in some areas where electricity is scarce, ammonia water absorption refrigerators also have broad development prospects due to energy saving. In view of the above situations, At present, developed countries such as the United States, Japan, South Korea and Europe have once again invested in the research of ammonia absorption refrigerators. In Japan, the research and production of small ammonia absorption refrigerators have reached a relatively high level. In the heat exchange components of refrigerators, such as condensers and evaporators, plate-fin heat exchangers have been used, which have achieved good results in reducing size and improving thermal coefficient. The heat recovery technology (GAX cycle) can improve the thermodynamic coefficient of the ammonia water absorption refrigerator. However, the existing technology has not improved the size and weight of the absorber, which is the main component of the ammonia water absorption refrigerator. Obvious progress can be made. The heat transfer tubes are mainly steel pipes. The heat exchange characteristics of the above-mentioned absorber are mainly based on the mass transfer process. In order to enhance the mass transfer, the contact area of ​​the vapor-liquid two-phase must be increased, and the spray method is usually used. The shell-and-tube structure has a low heat transfer coefficient, so it is the main factor for the large volume and weight of the absorber and other units

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