Floating suction pressures in industrial

[Segei]

Just back from vacation. Production plants. Some production processes require lower suction pressures than others. Sometimes suction pressure can be increased when only higher suction pressure is required. Holding freezers. At steady refrigeration load increase of suction pressure will require to run additional evaporators and additional evaporator fans. These fans use energy and release this energy into refrigeration room as parasitic refrigeration load. Additional compressors energy required to remove this load. At optimum suction pressure plant(compressors + evaporator fans) energy use per net refrigeration unit will be minimal.