Comparative Study of Thermal Waste Recovery Systems Deployed in Three Different Chemical Units

Waste thermal energy is enough amount of energy that is rejected to the atmosphere in the form of flue gases, streams of air, and liquid rejected from industries. It arises from the equipment, less efficient processes, and limitations due to the laws of thermodynamics on operations. It is obvious that it is not possible to regenerate all waste energy but most of the time some waste heat can be used to achieve useful purposes. Waste heat recovery is the most important key to carry out most of the research areas. The major areas of research and it is necessary to make the process more energy-efficient in chemical industries. To save energy Heat Exchanger Network’s synthesis (HEN) is essential. They are designed to reach energy targets. HEN design is the thermal integration between cold and hot utilities by pinch analysis at minimum temperature difference. HENs are important for utility saving because it helps in recovering heat from hot streams to others which reduces the utility consumption and requirement. The heat exchangers design with simplified models for different industries using pinch technology by which most thermal recovery is obtained and then some HEN network is required for a particular targeted area. In this research improvements in energy recovery systems and HENs, synthesis helps in capital savings and pollutant emission can also be reduced.