Energy Conservation by Waste Heat Recovery Methods

           As per the first law of thermodynamics, 100% energy utilization is prohibited. Thus, some utilized energy always becomes waste heat, and is normally discharged into the environment. Many energy applications in various industries have faced the same situation. Utilizing the waste heat for other purposes is sustainable utilizing. Examples of the waste heat recovery system are described below.

• Vented steam WHR (Waste Heat Recovery): In the sterilization process or retorts, most steam is vented to the atmosphere after the process is ended. But the vented steam still remains a potential source of heat energy. The potential heat energy can be used for hot water production feeding to a boiler or other process.

• Waste heat recovery of engine: Basically, a gas engine-based power plant generates potential waste heat mainly as exhaust and cooling water. This waste heat is able to be used in several applications both for cooling and heating.

• Hot air from air compressors ventilation system: The low temperature waste heat may be considered as warmed air for air preheating in boilers or buildings.

• Utilizing the flue gas of GENSET to produce either steam or hot water as cogeneration model.