Cooling fluid of wind turbine inverter and preparation method of cooling fluid

Abstract

The invention discloses a cooling fluid of a wind turbine inverter and a preparation method of the cooling fluid, and belongs to the field of operation and maintenance of the wind power industry. Thecooling fluid consists of the following components in parts by weight: 1,3-propanediol 40-60 parts, cerium trichloride heptahydrate 0.5-1 part, allocinnamic acid 0.2-0.5 part, ethylidene diamine tetramethylphosphonic acid 1-5 parts, sodium benzoate 0.5-1 part, potassium dihydrogen phosphate 1-5 parts, triethanolamine 1-5 parts, sodium hydroxide 0.1-0.3 part, deionized water 40-50 parts and water-based fluorescent blue dye 0.02-0.05 part. The cooling fluid does not freeze at -45 DEG C, and a compound of cerium trichloride heptahydrate and allocinnamic acid can form a conversion film on the surface of aluminum metal, so that corrosion of aluminum alloy can be effectively inhibited. The formula of the cooling fluid can be used to effectively avoid problems of performance instability and deposition of an inorganic corrosion inhibitor in high temperature environment, and has the properties of high energy efficiency, low cost and low pollution.

Description

technical field [0001] The invention relates to the field of cooling systems for frequency converters of wind turbines, in particular to a cooling liquid for frequency converters of wind turbines and a preparation method thereof. Background technique [0002] The working principle of the wind turbine inverter cooling system is that the water pump drives the coolant in the closed pipeline to circulate heat exchange, and the heat-absorbed coolant passes through the air cooler and the cooling air for secondary heat exchange, thereby reducing the temperature of the system. The working efficiency of the cooling system directly affects the working efficiency of the frequency converter and the power generation efficiency of the wind turbine. The coolant is used as the cooling medium of the inverter cooling system. The coolant needs to have low-temperature anti-freezing effect at low temperature in the alpine region, and anti-corrosion effect at high temperature. [0003] At presen...

AI Technical Summary

Problems solved by technology

[0003] At present, engine antifreeze is basically used as the coolant for wind turbines. For example, the Chinese patent application with the publication number CN107629765A and the publication date is January 26, 2018. Most engine antifreezes on the market are inorganic corrosion inhibitors. Unstable performance, deposition and other problems, the low temperature environment cannot meet the antifreeze requirements

However, the wind power industry has its particularity of use. There is an essential difference between the heat exchange system of the inverter and the heat exchanger of the engine, and the operating environment and temperature of the coolant are quite different. Therefore, the engine antifreeze cannot be directly used as the inverter of the wind turbine. Coolant