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

Abstract

A heat source system includes a heat source machine, a cooling tower side outward path and a cooling tower side return path that are connected to the heat source machine, a load side outward path and a load side return path that are connected to the heat source machine, a heat exchange path provided in one of the load side return path and the cooling tower side outward path, a heat exchanger that performs heat exchange between the heat exchange path and the other one of the load side return path and the cooling tower side outward path, and a heat exchange adjustment valve capable of adjusting a flow rate of the heat exchange path.

1 . A heat source system comprising:
 a heat source machine;   a cooling tower side outward path and a cooling tower side return path that are connected to the heat source machine;   a load side outward path and a load side return path that are connected to the heat source machine;   a heat exchange path provided in one of the load side return path and the cooling tower side outward path;   a heat exchanger that performs heat exchange between the heat exchange path and the other one of the load side return path and the cooling tower side outward path; and   a heat exchange adjustment valve capable of adjusting a flow rate of the heat exchange path.   
     
     
         2 . The heat source system of  claim 1 , comprising:
 a cooling tower bypass path connecting the cooling tower side outward path and the cooling tower side return path with each other; and   a cooling tower bypass valve capable of adjusting a flow rate of the cooling tower bypass path,   wherein the heat exchange path is provided on the load side return path, and   the heat exchanger is disposed in the cooling tower side outward path at a position closer to the heat source machine than the cooling tower bypass path.   
     
     
         3 . The heat source system of  claim 1 , comprising:
 a cooling tower bypass path connecting the cooling tower side outward path and the cooling tower side return path with each other; and   a cooling tower bypass valve capable of adjusting a flow rate of the cooling tower bypass path,   wherein the heat exchange path is provided in the cooling tower side outward path at a position closer to the heat source machine than the cooling tower bypass path.   
     
     
         4 . The heat source system of  claim 1 , comprising:
 a load determination unit that determines whether or not a load of cold heat supply from the heat source machine is less than a load lower limit value; and   a driving control unit that causes the heat exchanger to perform the heat exchange by controlling the heat exchange adjustment valve in a case in which the load determination unit determines that the load of the cold heat supply from the heat source machine is less than the load lower limit value.   
     
     
         5 . A control device that controls a heat source system comprising:
 a heat source machine;   a cooling tower side outward path and a cooling tower side return path that are connected to the heat source machine;   a load side outward path and a load side return path that are connected to the heat source machine;   a heat exchange path provided in one of the load side return path and the cooling tower side outward path;   a heat exchanger that performs heat exchange between the heat exchange path and the other one of the load side return path and the cooling tower side outward path; and   a heat exchange adjustment valve capable of adjusting a flow rate of the heat exchange path, the control device comprising:   a load determination unit that determines whether or not a load of the heat source machine is less than a load lower limit value; and   a driving control unit that causes the heat exchanger to perform the heat exchange by controlling the heat exchange adjustment valve in a case in which the load determination unit determines that the load of the heat source machine is less than the load lower limit value.   
     
     
         6 . A control method comprising:
 determining whether or not a load of a heat source machine of a heat source system is less than a load lower limit value, the heat source system comprising the heat source machine, a cooling tower side outward path and a cooling tower side return path that are connected to the heat source machine, a load side outward path and a load side return path that are connected to the heat source machine, a heat exchange path provided in one of the load side return path and the cooling tower side outward path, a heat exchanger that performs heat exchange between the heat exchange path and the other one of the load side return path and the cooling tower side outward path, and a heat exchange adjustment valve capable of adjusting a flow rate of the heat exchange path; and   causing the heat exchanger to perform the heat exchange by controlling the heat exchange adjustment valve in a case in which it is determined that the load of the heat source machine is less than the load lower limit value.   
     
     
         7 . A non-transitory computer-readable recording medium storing a program for a computer that controls a load of a heat source machine of a heat source system comprising the heat source machine, a cooling tower side outward path and a cooling tower side return path that are connected to the heat source machine, a load side outward path and a load side return path that are connected to the heat source machine, a heat exchange path provided in one of the load side return path and the cooling tower side outward path, a heat exchanger that performs heat exchange between the heat exchange path and the other one of the load side return path and the cooling tower side outward path, and a heat exchange adjustment valve capable of adjusting a flow rate of the heat exchange path, the program causing the computer to execute:
 determining whether or not the load of the heat source machine is less than a load lower limit value; and   causing the heat exchanger to perform the heat exchange by controlling the heat exchange adjustment valve in a case in which it is determined that the load of the heat source machine is less than the load lower limit value.