Hi all,
currently I have one question puzzled me a lot.
When i do Hysys heat exchanger simulation,and when the cold stream outlet temperature is higher than the hot stream outlet temperature, there will be a error warnning "temperature cross".Usually,we try to avoid such situations. But i checked some of the process specifications of heat exchanger of my plant, this situation ( the cold stream outlet temperature is higher than the hot stream outlet temperature)does exist, is this normal ?
Thank you !