Page 313 - HVAC Pump Handbook
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                                   Basics of Pump Application for HVAC Systems

                    310   The HVAC World



























                    Figure 10.18  Adaptive control with system head areas. (Courtesy, tekWorx
                    LLC, Cincinnati, Ohio.)



                       30

                                                            Two pumps


                                       Calculated kW curves
                       20

                      kW input               Calculated point        Two pumps
                                             of addition

                                                               Actual point
                       10                                      of  addition
                                     One pump
                                                              Actual kW curves

                                                One pump

                        0
                         0           500          1000         1500          2000
                                             System flow—GPM
                    Figure 10.19  Use of adaptive control for pump sequencing. (Courtesy, tekWorx
                    LLC, Cincinnati, Ohio.)






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