A cryogenic supercritical fluid regasification experimental system and working method

Abstract

The invention discloses an experiment system for regasification of deep cooling supercritical fluid and a working method. The system comprises a hot water loop, a medium-temperature medium loop and adeep cooling supercritical fluid loop. The hot water loop and the medium-temperature medium loop exchange heat through floating coil heat exchangers. The medium-temperature medium loop and the deep cooling supercritical fluid loop exchange heat through supercritical fluid gasifying devices. The hot water loop comprises one floating coil heat exchanger, an electrical heater, an expansion water tank, a hot water pump and the like which communicate in sequence. The medium-temperature medium loop comprises the other floating coil heat exchanger, one supercritical fluid gasifying device, a liquid storing device, a circulating pump and the like which communicate in sequence. The deep cooling supercritical fluid loop comprises a liquid storing tank, an immersed pump, a pressure stabilizing tank,the other supercritical fluid gasifying device, a back pressure valve and the like which sequentially communicate. The system is applicable to regasification of multiple kinds of supercritical fluid,controllability of the medium-temperature medium is high, and the high engineering value is possessed. The invention further discloses a working method of the experiment system for regasification of the deep cooling supercritical fluid.

Description

technical field [0001] The invention relates to the technical field of cryogenic supercritical fluid heat transfer, in particular to a cryogenic supercritical fluid regasification experimental system, which can meet the regasification requirements of various cryogenic supercritical fluids. Background technique [0002] Supercritical fluid refers to the fluid whose temperature and pressure are higher than its critical state. Its characteristics are that the viscosity and diffusion coefficient are close to gas, while the density and solvation ability are close to liquid. At the same time, the properties of supercritical fluid change with temperature and pressure. Very sensitive. Cryogenic supercritical fluids usually refer to supercritical fluids with temperatures ranging from -40.15°C to -196.15°C. Generally, industrial gases such as LNG, liquid oxygen, liquid hydrogen, liquid nitrogen, and liquid carbon dioxide need to be stored and transported in liquid form, and then rega...

AI Technical Summary

Problems solved by technology

However, the system realizes LNG regasification through multiple heat exchanges, resulting in complex system structure, huge seawater flow required, high energy consumption of water pumps, and changes in seawater temperature in four seasons, which affect the stable operation of the system

In addition, the NG outlet temperature of the system cannot meet the usage requirements, and needs to be heated again to meet the usage requirements

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