3results about How to "Save compression work" patented technology

This application discloses a system and method for producing cryogenic cooling capacity based on carbon dioxide, belonging to the field of pipeline transportation technology. The system includes: a multi-stage compressor, a first heat exchanger, an absorption chiller, a regenerator, a second heat exchanger, a booster pump, and an expander. By processing the input room-temperature gaseous carbon dioxide through a series of steps, the system can output cryogenic gaseous carbon dioxide that provides cryogenic cooling capacity for the cryogenic distillation process of carbon dioxide. By using this cryogenic carbon dioxide to replace liquid ammonia as a refrigerant, not only is the problem of the difficulty in obtaining cryogenic cooling capacity in the cryogenic distillation process solved, but the hazards are also reduced, making the refrigeration process more energy-efficient and environmentally friendly.

The application discloses a step-by-step cooling carbon dioxide refrigeration system, which is composed of a compressor, a compression cooler, a re-cooler, a cooler, an evaporator, a throttling device, a working medium pipeline, a cooling pipeline, an adjusting valve, a low-temperature pipeline and a temperature sensor, the compression cooler is in close contact with the outer wall of the compression cavity / cylinder of the compressor, the temperature sensor is arranged on the exhaust pipe of the compressor, the compressor is connected with the cooler, the re-cooler, the throttling device and the evaporator through the working medium pipeline to form a closed refrigeration system, and the closed refrigeration system is filled with proper working medium, the cooling fluid in the cooling pipeline flows through the re-cooler, the compression cooler and the cooler in sequence, the working state of the adjusting valve is controlled by the temperature sensor, and the fluid in the low-temperature pipeline flows through the evaporator, so that the compression process of the carbon dioxide is strengthened by the compression cooler, the cooling process of the carbon dioxide is strengthened by the added re-cooler, and the energy efficiency ratio and the operation reliability of the carbon dioxide refrigeration system are obviously improved.

An embodiment of the present invention provides a supercritical carbon dioxide isothermal compression system, comprising: a compressor having a compression inlet and a compression outlet; a mixer connected to the compressor and communicating with the compression inlet, the mixer being used to mix carbon dioxide and oil; and a separator communicating with the compression outlet, the separator being used to separate the mixture of carbon dioxide and oil. In this supercritical carbon dioxide isothermal compression system, the mixer mixes gaseous supercritical carbon dioxide and liquid oil to form a gas-liquid mixture. This gas-liquid mixture is compressed under the action of the compressor. The gaseous supercritical carbon dioxide generates a large amount of heat of compression during compression, while the liquid oil, with its high specific heat, absorbs the heat of compression generated by the supercritical carbon dioxide, thereby suppressing the temperature rise of the supercritical carbon dioxide during compression, reducing the compression work generated during compression, and reducing the energy consumed during compression.