An adaptive control system and method for turbine output power of an ocean temperature difference energy system

Abstract

The invention relates to an adaptive control system and method for the output work of a turbine of an ocean temperature difference energy system. The adaptive control system is characterized by comprising temperature sensors and a signal collecting controller; the four temperature sensors are arranged at inlet and outlet positions of heat exchangers in a warm sea water loop and a cold sea water loop of the ocean temperature difference energy system and are used for measuring the temperature of the inlets and the temperature of the outlets of the heat exchangers in the warm sea water loop and the cold sea water loop; and the signal collecting controller is electrically connected with the four temperature sensors and is used for calculating the sea water flow speed needed for the turbine inthe ocean temperature difference energy system to reach stable output in real time according to the real-time measured inlet temperature and outlet temperature by adopting an adaptive algorithm, the flow speed of a sea water pump in the ocean temperature difference energy system is controlled in real time according to the sea water flow speed calculated in real time, and therefore the turbine of the ocean temperature difference energy system can reach a stable output work state. The adaptive control system and method can be widely applied to the field of ocean temperature difference energy power generation.

Description

technical field [0001] The invention relates to an adaptive control system and method for turbine output power of an ocean temperature difference energy system, and belongs to the field of ocean temperature difference energy power generation. Background technique [0002] Ocean temperature difference power generation is a power generation method that uses the temperature difference between the warm seawater on the surface of the ocean and the cold deep seawater to convert heat energy into electrical energy through a thermodynamic cycle. Commonly used thermodynamic cycle methods include Rankine cycle, Karina cycle and Uehara cycle. Among them, the Rankine cycle uses a low-boiling-point working fluid to circulate in a closed circuit, and it has a simple structure and a relatively small size of the device (especially the turbine unit). Advantages, easy to achieve industrial development and promotion, therefore, is the most commonly used form of circulation. The ocean temperatu...

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Problems solved by technology

Because the seawater temperature is affected by the sun and seasons, there are periodic and irregular changes in the day, month, year, etc., resulting in fluctuations in the input conditions of the ocean temperature difference energy system. If the seawater flow parameters are not adjusted accordingly, the system will deviate from Optimizing the operating state leads to a decrease in the output efficiency of the turbine in the system. However, there is no adaptive control method for the turbine in the ocean thermal energy system to achieve stable output in the prior art.

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