Simulation Study on Large Temperature Difference and Energy Saving of Central Air Conditioning System of Luxury Cruise Ship

The steam compression chiller of traditional central air conditioning generally adopts the operation strategy of variable frequency and constant temperature difference of chilled water and cooling water, which has the problems of low unit operation efficiency and high power consumption of matching variable frequency water pump. To solve these problems, a strategy to change the temperature difference and flow of chilled water is proposed. By establishing the mathematical model of chiller, variable frequency water pump and seawater heat exchange module, TRNSYS is used for experimental simulation. The experimental results show that this strategy can effectively reduce the operating energy consumption of the central air conditioning system, reduce the selection requirements of variable frequency water pumps for chillers, and save some equipment costs.