Seafloor cold-water-pipe water taking system for ocean thermal energy conversion power plants

Abstract

The invention provides a seafloor cold-water-pipe water taking system for ocean thermal energy conversion power plants. A cold water inlet is arranged on a generating ship. A cold water pipe comprises a water taking head, a water taking pipe and a connecting pipe, wherein the water taking pipe is formed by serially connecting a plurality of composite pipes; each composite pipe is in a tubular shape formed by a plurality of wavy inner pipes in sequential arrangement; the connecting pipe consists of an outer casing pipe and an inner casing pipe in mutual socket joint; the connecting pipe is connected with the cold water inlet of the generating ship through the inner casing pipe thereof; and the tail end of the outer casing pipe of the connecting pipe is connected with a connecting part of the water taking pipe. The system has the advantages that the system can transmit a large amount of low-temperature seawater on deep seafloor for the commercial operation of the power plants, has firm structure strength, can bear the intrusion of seawater and ocean currents, and is not easy to damage.

Description

Technical field [0001] The invention relates to a submarine cold water pipe water intake system of an ocean temperature difference power plant. Background technique [0002] The principle of ocean thermal energy conversion is that after seawater absorbs solar heat, the surface seawater temperature is higher, while the deep seawater temperature is lower, and the temperature difference between the two is used to generate electricity. The power generation method is more It can be divided into two types: open and closed. The open system is limited by the low efficiency of the current low-pressure turbine and therefore cannot be commercialized. The closed power generation principle is as follows Picture 20 As shown, a working medium—ammonia is installed in a closed pipeline. When hot seawater undergoes heat exchange, the liquid ammonia can be evaporated into ammonia vapor in an evaporation tank, and the heat is also dependent on the heat in a condensation tank. The exchange principle...

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Problems solved by technology

[0003] However, since the seawater temperature difference is only about 20°C, a large amount of seawater is required to achieve commercial-grade power generation. Therefore, it is necessary to manufacture a water intake pipe with a large diameter to draw cold and hot seawater. It is not only difficult to manufacture a water intake pipe with a large diameter, but its manufacturing cost is also quite high, especially for the water intake pipe used to draw deep seawater from the seabed, in addition to having a large diameter, it must also have a considerable length to penetrate into the seawater Water is taken from the bottom, so how to manufacture pipes with large diameter and excellent structural strength to withstand the invasion of seawater ocean currents is the problem to be solved by this invention.

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