Dual ejector refrigeration cycle system with inter heat exchanger and method of refrigeration cycle system

Abstract

The invention discloses a dual ejector refrigeration cycle system with an inter heat exchanger and a method of the refrigeration cycle system. According to the refrigeration cycle system, CO2 is usedas a refrigerant, the ice making amount is large, and the heat of a gas cooler can be well utilized in a gradient manner; double compressors and the double ejectors are adopted, so that the circulation efficiency is improved, and the energy consumption is reduced; compared with a conventional carbon dioxide refrigeration cycle, the refrigeration cycle system has the advantages that the efficiencyis improved by 18-25%, and the loss can be reduced by about 35-45%; and compared with a novel ejector carbon dioxide refrigeration cycle, the efficiency is improved by 6-12%, when the pressure of thegas cooler is low, the loss is reduced by about 10%, and the loss difference between the gas cooler and the ejector is very small along with increase of the pressure. According to the refrigeration cycle system, the heating performance coefficient is slightly increased, and the refrigerating performance coefficient is increased by 10-25%, so that heat regeneration is increased under the low-evaporation-temperature working condition of a skating rink, cold energy is effectively utilized, and the operation cost is reduced.

Description

technical field [0001] The invention relates to ice rink refrigeration cycle technology, in particular to a transcritical carbon dioxide refrigeration cycle system with an internal regenerator and dual ejectors and a method thereof. Background technique [0002] Two important aspects of current refrigeration systems are the environmental perspective and energy costs. Some traditional refrigerants that are harmful to the environment have been excluded from the market, and the second-generation refrigerants represented by natural refrigerants, such as ammonia NH 3 , has been developed for more than 50 years and has many advantages. However, there are still some shortcomings in the security and efficiency of the system. [0003] NH 3 The risk of leakage is the main reason for the indirect design, as the design confines the NH in the system as much as possible 3 , so another liquid is required in the dispense cycle. Therefore, due to the heat exchange between the different ...

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Problems solved by technology

[0005] Aiming at the shortcomings of low carbon dioxide refrigeration cycle efficiency and large energy consumption in current refrigeration occasions such as ice skating rinks, the present invention proposes a transcritical carbon dioxide refrigeration cycle system with internal regenerators and double ejectors and its method

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