In the air-conditioning laboratory, when measuring the cooling capacity (or heating capacity) of the water side of the water machine, the inlet and outlet water temperature and water flow rate of the prototype are usually measured, and then the cooling capacity (or heating capacity) is calculated. The water flow here is basically measured with an electromagnetic flow meter.

Driving factors according to the prediction of the International Energy Agency (IEA), from 2007 to 2030, the world needs to invest $26.0 trillion in energy infrastructure (in 2007 dollars). Among them, the investment in the power industry is US $13.6 trillion, accounting for 52.3% of the total investment. By 2030, the infrastructure of oil, gas and electricity in many parts of the world will need to be replaced.

It can resist the corrosion of hydrochloric acid, acetic acid, oxalic acid, ammonia, phosphoric acid and 50% sulfuric acid, sodium hydroxide and potassium hydroxide at room temperature, but it is not resistant to the corrosion of strong oxidants Measure general acid, alkali and salt solutions 1. Excellent elasticity, high breaking force and good wear resistance 2. It is resistant to the corrosion of general low concentration acid-base and salt solution, but not resistant to the corrosion of oxidizing medium