Figure 6 Composite curves
Figures 6 and 7 show the composite curves and the grand composite curves for the heat exchanger network presented in Figure 5. The temperature-enthalpy diagram is a graphical tool that depicts the heat transfer between any two hot and cold streams. It is an alternative technique that gives useful insights into the temperature-driving force for heat transfer between the streams. It is a plot of temperature on the y-axis versus enthalpy or heat transferred on the x-axis for the same heat-exchanger units in the network.