Energy Targets

Construction of Composite Curves

Temperature-enthalpy (T-H) profiles of heat availability in the process (the hot composite curve) and the demands in the process (the cold composite curve) together form a graphical representation. Based on thermodynamic principles, pinch analysis offers a systematic approach to optimize energy integration in a process. One of the key advantages of pinch analysis is the ability to set an energy target for the design. The energy target is the minimum theoretical energy demand for the overall process. The second law of thermodynamics states that heat will flow from a region of higher temperature to one of lower temperature. As shown in Equation 16-12, in a heat exchanger the required heat transfer area ...

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