Heat source control device, heat source system, and heat source control method

Abstract

In a heat source control device, a heat source system, and a heat source control method, heat source groups, a plurality of group control units, and a number-of-units control unit are included. The group control units include a first operating-range output unit and a second operating-range output unit. When a requested load exceeds a first proper operating range, the number-of-units control unit increases the number of activated heat source groups and controls the group control units so that the number of activated heat source units is a predetermined number.

1 . A heat source control device comprising:
 a plurality of group control units configured to perform start/stop and load allocation of a plurality of heat source units corresponding to heat source groups of the plurality of heat source units; and   a number-of-units control unit configured to perform start/stop and load allocation of the heat source groups,   wherein the group control unit includes   a first operating-range output unit configured to output a load range in which one of characteristic values of the heat source units corresponding to the number of operating heat source units is within a predetermined range as a first proper operating range to the number-of-units control unit based on the characteristic values of the heat source units, and   a second operating-range output unit configured to output a load range in which another of the characteristic values is in the predetermined range as a second proper operating range to the number-of-units control unit, and   wherein the number-of-units control unit increases the number of activated heat source groups when a requested load exceeds the first proper operating range.   
     
     
         2 . The heat source control device according to  claim 1 ,
 wherein the first operating-range output unit uses COP information indicating a relation between a coefficient of performance and a load ratio as the characteristic value and outputs a load range in which one of the characteristic values corresponding to the number of operating heat source units is equal to or greater than a predetermined value as the first proper operating range to the number-of-units control unit, and   wherein the second operating-range output unit outputs a load range in which another of the characteristic values is equal to or greater than the predetermined value as the second proper operating range to the number-of-units control unit.   
     
     
         3 . The heat source control device according to  claim 1 ,
 wherein the first operating-range output unit uses inverter input information as the characteristic value and outputs a load range in which one of the characteristic values corresponding to the number of operating heat source units is equal to or less than a predetermined value as the first proper operating range to the number-of-units control unit, and   wherein the second operating-range output unit outputs a load range in which another of the characteristic values is equal to or less than the predetermined value as the second proper operating range to the number-of-units control unit.   
     
     
         4 . The heat source control device according to  claim 1 ,
 wherein the group control unit sets, as transmission data from the group control unit, an optimum load range corresponding to the number of operating heat source units among the connected heat source units and an operatable load range corresponding to 1+the number of operating heat source units.   
     
     
         5 . The heat source control device according to  claim 4 ,
 wherein, when load distribution to the heat source groups from the number-of-units control unit is greater than the operatable load range for the number of operating heat source units, the number of operating heat source units in the heat source group is increased and the optimum load range and the operatable load range are updated.   
     
     
         6 . The heat source control device according to  claim 5 ,
 wherein, when load distribution to the heat source groups from the number-of-units control unit is less than the operatable load range for the number of operating heat source units, the number of operating heat source units in the heat source group is decreased and the optimum load range and the operatable load range are updated.   
     
     
         7 . A heat source system comprising:
 the heat source control device according to  claim 6 ; and   heat source groups of the plurality of heat source units.   
     
     
         8 . A heat source control method comprising:
 a plurality of group control steps of performing start/stop and load allocation of a plurality of heat source units corresponding to heat source groups of the plurality of heat source units; and   a number-of-units control step of performing start/stop and load allocation of the heat source groups,   wherein the group control step includes   a first operating-range output step of outputting a load range in which one of characteristic values of the heat source units corresponding to the number of operating heat source units is within a predetermined range as a first proper operating range in the number-of-units control step based on the characteristic values of the heat source units, and   a second operating-range output step of outputting a load range in which another of the characteristic values is in the predetermined range as a second proper operating range in the number-of-units control step, and   wherein, in the number-of-units control step, the number of activated heat source groups is increased when a requested load exceeds the first proper operating range.