CONTROL OF HEAT EXCHANGER OPERATION

摘要

A method of controlling tree operation of a heat exchanger with evaporative and non- evaporative sections. The method includes the following steps: providing desired values of temperature or pressure; comparing present values of temperature or pressure to the desired values of temperature and pressure; and manipulating an air flowrate to the heat exchanger and load to the evaporative heat exchanger to optimize total energy and water costs while maintaining an outlet fluid at the desired temperature or pressure.