/community-hubs/deltav-community-connect/b/delta-vweblog/posts/reactor-cooling-and-heating-systems-part-4Heat exchangers in a coil or jacket recirculation system are used to provide tempered water. This allows the use of colder or hotter utility streams as inputs to exchangers rather than as inputs to a coil or jacket, moderating temperature extremes  thaten-USTelligent Community 13