Transcritical CO2 mechanical supercooling refrigeration system with high-pressure ejector
An ejector and transcritical technology, which is applied in subcoolers, refrigerators, compressors, etc., can solve problems such as increased throttling losses, and achieve the effects of reducing pressure ratio, reducing losses, and improving efficiency
Pending Publication Date: 2021-10-19
SHANGHAI OCEAN UNIV
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Problems solved by technology
[0005] During cycle throttling, CO 2 The refrigerant changes from a gas phase to a gas-liquid two-phase state, and the throttling loss is greatly increased compared to other systems
Method used
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[0028] specific implementation plan
[0029] A specific embodiment of the present invention will be further described below in conjunction with the accompanying drawings, and those skilled in the art can easily understand other advantages and effects of the present invention from the content shown in this specification.
[0030] like figure 1 As shown, a transcritical CO2 mechanical subcooling refrigeration system with a high-pressure ejector consists of a low-temperature compressor A, a condenser B, a subcooler C, a throttle valve D1, a throttle valve D2, and an evaporator (cold fan for cold storage) E. Composed of high-pressure injector F, gas-liquid separator G, high-temperature compressor H, solution pump J and heat exchanger K.
[0031] Subcritical CO 2 The refrigeration cycle consists of a low-temperature compressor A, a condenser B, a subcooler C, a throttle valve D1 and an evaporator (refrigerated fan) E to form a closed loop. The outlet of the low-temperature compr...
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The invention provides a transcritical CO2 mechanical supercooling refrigeration cycle system with a high-pressure ejector, and relates to the field of food freezing and refrigeration. The system comprises a subcritical CO2 refrigeration cycle, a transcritical CO2 mechanical supercooling cycle and a waste heat recovery cycle. The system is composed of a compressor, a condenser, an air cooler, a subcooler, a throttle valve, an evaporator (a cold storage air cooler), a high-pressure ejector, a gas-liquid separator, a heat exchanger and a solution pump. The transcritical CO2 mechanical supercooling cycle with the high-pressure ejector is introduced into the basic subcritical CO2 refrigeration cycle, and the outlet temperature of the condenser can be effectively reduced under the condition that less extra work is consumed; and the refrigerating capacity of the system is improved, and therefore the efficiency of the system is improved. Meanwhile, the system can play a role in recovery of waste heat of the condenser and the air cooler, and energy waste is reduced.
Description
technical field [0001] The invention relates to the technical field of refrigeration cycles, in particular to a transcritical CO 2 Mechanical subcooling refrigeration cycle system. Background technique [0002] In the refrigeration industry, chlorofluorocarbon refrigerants can cause serious damage to the ozone layer, thereby exacerbating the greenhouse effect. In this context, the pure natural working substance CO 2 With its unique advantages, it has become a popular choice to replace other refrigerants. [0003] Pure natural working medium CO 2 It has the following advantages: the ozone depletion potential value is equal to 0, the global warming potential value is equal to 1; the cooling capacity per unit volume is high, so that CO 2 The components of the refrigeration system are small; the thermal conductivity is high; the kinematic viscosity is low, and it is easy to reach a turbulent state to enhance the heat transfer effect; the cost is low and easy to obtain. [0...
Claims
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Login to View More IPC IPC(8): F25B9/08F25B40/02F25B49/02F24H4/02
CPCF25B9/008F25B9/08F25B40/02F25B49/02F24H4/02
Inventor 谢晶李杨杨大章朱杰王金锋
Owner SHANGHAI OCEAN UNIV