The conventional approach for energy saving in a process system is to maximize heat recovery without changing any process conditions by using pinch technology‎.‎ ‎"‎Self‎-heat recuperation technology‎"‎ was developed to achieve further energy saving in the process system by eliminating the necessity for any external heat input‎,‎ such as firing or imported steam‎.‎ Advanced Energy Saving and its Applications in Industry introduces the concept of self‎-heat recuperation and the application of such technology to a wide range of processes from heavy chemical complexes to other processes such as drying and gas separation processes‎,‎ which require heating and cooling during operation‎.‎ Conventional energy saving items in a utility system are applied and implemented based on a single site approach‎,‎ however‎,‎ when looking at heavy chemical complexes‎,‎ it was apparent that the low‎-grade heat discharged as waste from a refinery could also be used in an adjacent petrochemical plant‎.‎ There could therefore be a large energy saving potential by utilizing the‎.‎‎.‎‎.‎