Ocean thermal energy and geothermal energy combined power generating system

Abstract

The invention discloses an ocean thermal energy and geothermal energy combined power generating system. The ocean thermal energy and geothermal energy combined power generating system mainly consists of a water storage pond, an ocean thermal gradient power generating subsystem, a water treatment subsystem, a water injection operating platform and a geothermal energy power generating subsystem. A cold seawater pipe is communicated with the water storage pond, and a warm seawater pipe is communicated with a water injection well of the geothermal energy power generating subsystem after passing through an ocean thermal gradient power generating subsystem which is lower than the sea level. The ocean thermal gradient power generating subsystem can run in the entire flow process without a pump through the pressure different action of the seawater and the technology such as a high-efficient condensing pipe, and the geothermal energy power generating subsystem adopts the cold seawater as a cooling water source to maintain lower condensation temperature. According to the ocean thermal energy and geothermal energy combined power generating system, not only is a purpose for improving the ocean thermal energy pure power generating efficiency realized, but also the geothermal energy power generating efficiency is also improved, and the energy utilization rate of the combined power generating system can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of new energy combined power generation, and in particular relates to a combined power generation system of ocean temperature difference energy and geothermal energy. Background technique [0002] Energy is indispensable for human survival and economic development. 70% of the earth's surface area is ocean, and the ocean is a huge energy pool. About 2 / 3 of the energy injected by the sun into the earth's surface is used to heat the surface seawater, and the temperature difference between it and the deep water exceeds 20°C. Theoretically, hot water can be used for power generation at a temperature difference of 16.6°C, so tropical oceans with a latitude of 20 degrees north and south are suitable for temperature difference power generation. According to calculations, if half of the ocean surface between north and south latitudes is used for power generation, the water temperature will only drop by 1°C on avera...

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Problems solved by technology

At present, the efficiency of geothermal power plants is very low, only 10%~15%. Because geothermal power plants usually use surface water as the cooling water source to condense the exhaust steam of the steam turbine, the cooling water temperature is high, which not only restricts the improvement of the efficiency of geothermal power plants, but also Geothermal power plants are required to build a cooling system with a much larger output than thermal power plants

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