3.9.1 Problem Table and GCC

1. Select a global ? T _min for the calculation (see also Note ^[a]).

2. Subtract ? T _min/2 (or ? T _cont, where different Note ^[b]) from all hot stream temperatures T _H and add ? T _min/2 (or ? T _cont) to all cold stream temperatures T _C to give the shifted temperatures S for each stream.

3. Make a list of all the shifted temperatures S at which streams (hot or cold) begin, end or change heat capacity flowrate CP.

4. Rank the list of shifted temperatures in descending order (highest temperature at the top).

5. In each temperature interval i between two shifted temperatures, add together the heat capacity flowrates of all the hot streams which exist in that temperature interval and subtract the heat capacity flowrates of all the cold streams, to give a net heat capacity flowrate CP _net (see Notes ^[c] and ^[d]).

6. Multiply CP _net for each interval by the temperature range of the interval ( T _i+1- T _i) to give the net heat released (positive) or required (negative) in the interval (see Notes ^[c]and ^[d]).

7. Starting from a zero input at the highest temperature, work down the table, adding on the net heat change in each temperature interval to give a heat cascade (cumulative heat passing through at a...