pinch method, Gourlia case, Problem data, Problem Table Algorithm, PTA, temperature shift, cumulative net enthalpy balances, enthalpy balances with input, Stream pairing, Composite curves, Conditions for a pinch to appear,Rules, above the pinch, Hot end heat exchanger network, below the pinch, Final heat exchanger network,Modeling with Thermoptim, Modeling tips, Optimization screen, Exchange blocks, Building heat exchangers, Small practical difficulties,Full heat exchanger network