LNG heat exchanger structure in HYSYS

LNG heat exchangers, also known as cryogenic tanks, typically use finned heat exchangers, and HYSYS is usually employed to simulate the entire refrigeration process during the design phase. In HYSYS simulations, there is no need to select a cold box configuration; the software defaults to a finned heat exchanger. In the design, the inlet and outlet streams are primarily entered to determine the cold and hot streams, and a pressure difference is set (it can be omitted; the default value is zero; it has an impact on the simulation but not significantly). During design, it must be ensured that not all flow rates can be defined, leaving unknown variables for software calculation. For “Zone, Sets, Layer”, they are not something that process designers need to consider, as opposed to cryogenic tank designers. Currently, the leading domestic manufacturers of cold boxes are Sichuan Chuankong and Hangzhou Zhongtai; if there is an opportunity to discuss matters with them, it will **help to gain a deeper understanding of cold boxes. The above are just some of my personal insights into design :)