Control device, heat source system, control method, and control program

Abstract

The purpose of the present invention is to provide a control device, a heat source system, a control method, and a control program with which a heat medium at a required temperature can be more effectively sent out. This control device, which is applied to a heat source system 1 comprising a plurality of heat source machines ( 2 a ), ( 2 b ) connected in series, comprises a setting unit which sets the outlet setting temperatures of cool water in the respective heat source machines ( 2 a ), ( 2 b ) on the basis of: a measured value of a cool water flow rate, measured values of inlet temperatures of the cool water in the respective heat source machines ( 2 a ), ( 2 b ); and the required outlet temperature of the cool water in the heat source system ( 1 ).

1 . A control device applied to a heat source system including a plurality of heat source machines connected in series, the control device comprising:
 a setting unit that sets an outlet setting temperature of a heat medium in each of the heat source machines on the basis of a measured value of a heat medium flow rate, a measured value of an inlet temperature of the heat medium in the heat source machine, and a required outlet temperature of the heat medium in the heat source system.   
     
     
         2 . The control device according to  claim 1 , wherein the setting unit sets the outlet setting temperature in each of the heat source machines such that the outlet setting temperature in each of the heat source machines becomes lower as the measured value of the heat medium flow rate becomes lower. 
     
     
         3 . The control device according to  claim 1 , wherein the setting unit calculates a value obtained by multiplying a temperature difference between a rated inlet temperature and a rated outlet temperature of the heat source machine by a correction coefficient that is a ratio of a rated value of the heat medium flow rate to the measured value of the heat medium flow rate, and sets the outlet setting temperature of each heat source machine by subtracting the calculated value from the measured value of the inlet temperature. 
     
     
         4 . The control device according to  claim 1 , further comprising:
 an update unit that compares an outlet setting temperature based on a heat medium flow rate set for a heat source machine on a most downstream side among the heat source machines connected in series with the required outlet temperature, and updates a higher temperature as an outlet setting temperature of the heat source machine on the most downstream side.   
     
     
         5 . The control device according to  claim 1 , further comprising:
 an update unit that compares the outlet setting temperature based on the heat medium flow rate with the outlet setting temperature based on a rated capacity ratio of each heat source machine and updates a higher temperature as the outlet setting temperature of the heat source machine in heat source machines other than a heat source machine on a most downstream side among the heat source machines connected in series, by using the outlet setting temperature of each heat source machine calculated on the basis of a result of distributing a difference between the inlet temperature of the heat medium of the heat source system and the required outlet temperature according to the rated capacity ratio.   
     
     
         6 . A heat source system comprising:
 a plurality of heat source machines connected in series; and   the control device according to  claim 1 .   
     
     
         7 . A control method for a heat source system including a plurality of heat source machines connected in series, the control method comprising:
 a step of setting an outlet setting temperature of a heat medium in each of the heat source machines on the basis of a measured value of a heat medium flow rate, a measured value of an inlet temperature of the heat medium in the heat source machine, and a required outlet temperature of the heat medium in the heat source system.   
     
     
         8 . A control program for a heat source system including a plurality of heat source machines connected in series, the control program causing a computer to execute:
 a process of setting an outlet setting temperature of a heat medium in each of the heat source machines on the basis of a measured value of a heat medium flow rate, a measured value of an inlet temperature of the heat medium in the heat source machine, and a required outlet temperature of the heat medium in the heat source system.   
     
     
         9 . The control device according to  claim 2 , wherein the setting unit calculates a value obtained by multiplying a temperature difference between a rated inlet temperature and a rated outlet temperature of the heat source machine by a correction coefficient that is a ratio of a rated value of the heat medium flow rate to the measured value of the heat medium flow rate, and sets the outlet setting temperature of each heat source machine by subtracting the calculated value from the measured value of the inlet temperature. 
     
     
         10 . The control device according to  claim 2 , further comprising:
 an update unit that compares an outlet setting temperature based on a heat medium flow rate set for a heat source machine on a most downstream side among the heat source machines connected in series with the required outlet temperature, and updates a higher temperature as an outlet setting temperature of the heat source machine on the most downstream side.   
     
     
         11 . The control device according to  claim 3 , further comprising:
 an update unit that compares an outlet setting temperature based on a heat medium flow rate set for a heat source machine on a most downstream side among the heat source machines connected in series with the required outlet temperature, and updates a higher temperature as an outlet setting temperature of the heat source machine on the most downstream side.   
     
     
         12 . The control device according to  claim 2 , further comprising:
 an update unit that compares the outlet setting temperature based on the heat medium flow rate with the outlet setting temperature based on a rated capacity ratio of each heat source machine and updates a higher temperature as the outlet setting temperature of the heat source machine in heat source machines other than a heat source machine on a most downstream side among the heat source machines connected in series, by using the outlet setting temperature of each heat source machine calculated on the basis of a result of distributing a difference between the inlet temperature of the heat medium of the heat source system and the required outlet temperature according to the rated capacity ratio.   
     
     
         13 . The control device according to  claim 3 , further comprising:
 an update unit that compares the outlet setting temperature based on the heat medium flow rate with the outlet setting temperature based on a rated capacity ratio of each heat source machine and updates a higher temperature as the outlet setting temperature of the heat source machine in heat source machines other than a heat source machine on a most downstream side among the heat source machines connected in series, by using the outlet setting temperature of each heat source machine calculated on the basis of a result of distributing a difference between the inlet temperature of the heat medium of the heat source system and the required outlet temperature according to the rated capacity ratio.   
     
     
         14 . A heat source system comprising:
 a plurality of heat source machines connected in series; and   the control device according to  claim 2 .   
     
     
         15 . A heat source system comprising:
 a plurality of heat source machines connected in series; and   the control device according to  claim 3 .   
     
     
         16 . A heat source system comprising:
 a plurality of heat source machines connected in series; and   the control device according to  claim 4 .   
     
     
         17 . A heat source system comprising:
 a plurality of heat source machines connected in series; and   the control device according to  claim 5 .