New graphical methods have been developed for HEN
retrofit, release of usable excess heat, and
placement of supply tanks in HWWS systems. In
addition, the matrix method for HEN retrofit has
been developed further.
Using the advanced composite curves together with
the matrix method in HEN retrofit gives new insights
into which units should be chosen for retrofit.
Calculations have shown that heaters and coolers
placed close to the pinch are often cheaper by a
factor of two or more to retrofit.
A method to show the potential for releasing usable
excess heat at high temperature levels (but still
below the pinch) has been developed. Case studies
demonstrate that much of the potential can also be
achieved with acceptable PBPs.
Another method, to be used in HWWS systems has also
been developed. It shows the potential usable excess
heat versus temperature in this subsystem for a user-
defined number of supply tanks and temperature
difference.
A new optimisation routine has been developed and
implemented into the matrix method. This method uses
a recursive branch and bound algorithm to explore
all relevant paths in the retrofit task.
retrofit, release of usable excess heat, and
placement of supply tanks in HWWS systems. In
addition, the matrix method for HEN retrofit has
been developed further.
Using the advanced composite curves together with
the matrix method in HEN retrofit gives new insights
into which units should be chosen for retrofit.
Calculations have shown that heaters and coolers
placed close to the pinch are often cheaper by a
factor of two or more to retrofit.
A method to show the potential for releasing usable
excess heat at high temperature levels (but still
below the pinch) has been developed. Case studies
demonstrate that much of the potential can also be
achieved with acceptable PBPs.
Another method, to be used in HWWS systems has also
been developed. It shows the potential usable excess
heat versus temperature in this subsystem for a user-
defined number of supply tanks and temperature
difference.
A new optimisation routine has been developed and
implemented into the matrix method. This method uses
a recursive branch and bound algorithm to explore
all relevant paths in the retrofit task.