Rankine cycle system based on pump-free ejection pressurization technology and cycle method thereof

Abstract

The invention relates to the field of Rankine cycles, in particular to a Rankine cycle system based on a pump-free ejection pressurization technology and a cycle method thereof. The system comprises agenerator, an expansion machine and a condenser, and further comprises a liquid storage tank and pressurization modules, wherein the generator, the expansion machine, the condenser, the liquid storage tank and the pressurization modules are sequentially connected to form a closed-loop cycle system, liquid outlets of the pressurization modules are connected with a liquid inlet of the generator, anair outlet of the generator is connected with an air inlet of the expansion machine, an air outlet of the expansion machine is connected with an air inlet of the condenser, a liquid outlet of the condenser is connected with a liquid inlet of the liquid storage tank, a liquid outlet of the liquid storage tank is connected with the two pressurization modules, and the liquid outlets of the two pressurization modules are connected with the liquid inlet of the generator. The Rankine cycle system and the cycle method thereof can utilize widely existing low-grade heat energy such as ocean temperature difference energy, flue gas waste heat and geothermal energy to drive an organic Rankine working medium to output work, do not need use of electric power to drive a pump, and are low in cost and high in efficiency.

Description

technical field [0001] The invention relates to the field of Rankine cycle, in particular to a Rankine cycle system and a cycle method based on pumpless ejection pressurization technology. Background technique [0002] With the development of the world economy and the increase of energy consumption, energy and environmental issues have become a hot issue of common concern all over the world. Low-grade heat energy comes from a wide range of sources, such as solar energy, ocean energy, low-grade waste heat generated in the production process of enterprises, Even the heat emitted by the flue gas is difficult to be utilized. [0003] Usually, low-grade temperature difference resources can be converted into other required resources such as work or cooling by using Rankine cycle or absorption cycle. Rankine cycle and absorption cycle usually use ammonia, R40, R134, etc. as working fluids, which often have defects such as destroying the atmosphere, being toxic, and causing global ...

AI Technical Summary

Problems solved by technology

Rankine cycle and absorption cycle usually use ammonia, R40, R134, etc. as working fluids, which often have defects such as destroying the atmosphere, being toxic, and causing global warming

At the same time, in addition to pipe fittings, heat exchangers and other components, this type of cycle also includes rotating parts such as pumps. The rotating parts have sealing problems and are prone to medium leakage.

However, the cost of reliable sealing of rotating parts is huge. In addition, the parts consume a lot of electricity during the working process, resulting in a huge loss of efficiency.

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