Ocean thermoelectric power generation cold seawater gradient utilization system

Abstract

The invention relates to an ocean thermoelectric power generation cold seawater gradient utilization system which comprises an evaporator, a separator, expansion machines, condensers and a cycle working medium pump. A cycle working medium in the system exchanges heat with ocean surface warm seawater in the evaporator to be evaporated into steam, and the steam is separated into a liquid working medium through the separator; a remaining dry working medium enters the plurality of subsequent expansion machines, and steam heat energy is converted into mechanical energy in the expansion machines to drive a power generator to generate power; and the working steam enters the corresponding condensers to be condensed into the liquid working medium through heat exchange with cold seawater, and then the liquid working medium is pressurized by the circulating working medium pump to be fed into the evaporator. By means of the ocean thermoelectric power generation cold seawater gradient utilization system, the cold energy of the cold seawater can be utilized in a gradient mode, the utilization rate of the cold seawater is increased, and consumption of the cold seawater is reduced under the same generating capacity; and power consumption of a cold seawater pump is reduced under the same generating capacity, system circulation is improved, the number and size of cold sea water pipes can be reduced, and the engineering construction investment is reduced.

Description

technical field [0001] The invention relates to an ocean temperature difference power generation system, in particular to a cold seawater cascade utilization system for ocean temperature difference power generation. Background technique [0002] According to the prior art, when the temperature difference between the surface temperature seawater and the deep cold seawater is greater than 18°C, it has the development value as an energy source. Ocean temperature difference energy is little affected by weather, day and night, and seasons, and its stability and controllability are comparable to fossil energy. Therefore, ocean temperature difference energy is also the most stable renewable energy in ocean energy. Ocean temperature difference power generation is an important utilization method of ocean energy. [0003] Ocean temperature difference power generation systems mainly include ammonia-water zeotropic mixed refrigerant Rankine Cycle, Uehara Cycle, Kalina Cycle, and Guohai...

AI Technical Summary

Problems solved by technology

[0004] Due to the low efficiency and large investment of the current operating ocean temperature difference power generation cycle system, it has been in the stage of test verification and has not entered into engineering application

The power consumption of cold sea water pumps is the largest power consumption of ocean temperature difference power generation; the cost of manufacturing and laying cold sea water pipes is also a large part of the project cost

At present, the utilization of cold seawater temperature for ocean temperature difference power generation is only about 2-3°C, and the utilization rate is extremely low.

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