In the ammonia refrigeration cycle, applying the
proposal temperature levels will decrease the DTLM of
chillers. Hence, by increasing the normal levels in chillers
[Appendix B], the heat transfer coefficient will be increased
which leads to the chillers’ heat load remaining constant.
The retrofitting, taken regarding the temperature levels,
cause just slight changes in chillers E-3408 & E-3409 flow
rates. Since these changes are not of any significance and
the fact that the chillers’ heat load are fixed after the retrofit, there is no need for making any changes or
designing new chillers.