Turbo expander with uniform liquid distribution function and refrigeration system

Abstract

The invention discloses a turbo expander with a uniform liquid distribution function and a refrigeration system. By means of the turbo expander and the refrigeration system, uniform liquid supply is achieved for all flow paths of an evaporator, and the throttling loss in the refrigeration system can be recycled. A liquid supply cavity at the center and an annular distribution cavity in the circumference are formed in a distribution body of the expander. The annular distribution cavity is divided into a plurality of distribution chambers through partition plates. Each distribution chamber is communicated with a liquid distribution pipe. A high-pressure refrigerant liquid supply pipe communicated with the liquid supply cavity is arranged at the center of one end face of the distribution body. A penetrating rotating shaft is installed in the liquid supply cavity. The portion, located in the liquid supply cavity, of the rotating shaft is provided with a plurality of rotating impellers. An opening facing the liquid supply cavity is formed in the inner side of each distribution chamber. The lengths of the openings in the distribution chambers are equal. The high-pressure refrigerant liquid supply pipe, the rotating shaft, the rotating impellers, the liquid supply cavity and the annular distribution cavity are coaxial. By means of the expander, the heat exchange performance of the evaporator is improved, and the efficiency of the refrigeration system is improved.

Description

technical field [0001] The invention relates to the technical field of refrigeration, and more specifically relates to a turbo expander and a refrigeration system with the function of uniform liquid separation. Background technique [0002] In the refrigeration system, the evaporator with direct expansion liquid supply usually adopts the form of multi-flow parallel connection to achieve the best heat exchange effect, maintain the best refrigerant flow rate, and limit the pressure loss of the pipeline within a certain range . The gas-liquid two-phase flow of the refrigerant coming out of the expansion valve is usually in the form of bubble flow or slug flow. Two-phase flow distribution equipment is required to fully mix the gas-liquid two-phase refrigerant and distribute it equally to each flow. on the road. In the refrigeration system, the refrigerant two-phase flow distribution equipment is usually called a liquid distributor or liquid separator. [0003] The liquid sep...

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Problems solved by technology

[0008] The purpose of the present invention is to solve the shortcomings of the existing liquid distributor such as uneven liquid separation and no recovery of throttling expansion work, and provide a method that not only realizes uniform liquid supply to each flow path of the evaporator, but also recovers the savings in the refrigeration system. turboexpander

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