JP6249331B2 - Heat source control device, heat source system, and heat source control method - Google Patents

Description

  The present invention relates to a heat source control device, a heat source system, and a heat source control method.

  In a large-scale building or the like, a cold / hot water system in which a plurality of cold / hot heat source devices are installed in parallel and a secondary heat load source such as an air conditioner is connected to the cold / hot heat source devices is used. Each cold / hot heat source machine is provided with a cold / hot water pump for circulating cold / hot water generated by each cold / hot heat source machine.

  In such a chilled / warm water system, the chilled / warm water flow required to cope with the heat load varies depending on the secondary load. Therefore, in such a cold / hot water system, the flow of the cold / hot water supplied to the secondary side heat load source must be controlled.

  As such a cold / hot water control method, a method is known in which the bypass flow rate of the secondary heat load source is controlled and the number of cold / heat source devices is controlled. In such a number control method, the number of operating units is selected by a flow rate, a heat amount, and a method that considers both the flow rate and the heat amount. In this case, the cold / hot water pump of the cold / hot heat source machine to be used is circulating the cold / hot water by changing a flow volume according to load.

  Various techniques related to such a background are known (see, for example, Patent Document 1).

  For example, Patent Literature 1 discloses a cooling / heating source comprising a plurality of cooling / heating source devices, a cooling / heating water pump provided in each cooling / heating source device, and a secondary heat load source connected to the plurality of cooling / heating source devices. A cold / hot heat source output distribution control method for a water system is described. More specifically, in this cold / hot heat source output distribution control method, the number of cold / hot heat source machines to be used is selected according to the heat load of the secondary heat source. And this cold / heat source unit output distribution control method divides the cool / heat source unit to be used into two groups each consisting of one or more when using a plurality of cool / heat source units. The ratio of the chilled / hot water flow rate of both groups of chilled / hot water sources to the chilled / hot water flow rate supplied to the secondary heat load source is changed so that the combined system COP is maximized. In addition to changing in the direction of increasing, the system COP is calculated and compared with the system COP before the change, if it is increased, it is further changed in the same direction, and if it is decreased, it is changed in the opposite direction. . In this way, depending on the cooling / heating source output distribution control method, the cooling / heating source can be operated with maximum efficiency as a whole system to reduce power consumption.

Japanese Patent No. 4435651

  However, in the invention described in Patent Document 1, when the number of cold / hot heat source machines is increased, the control cycle is extended, and there is a possibility that the state of the load to be changed changes. Therefore, according to the invention described in Patent Document 1, it cannot be guaranteed whether the search result is in the optimum state.

  Further, depending on the invention described in Patent Document 1, when a function similar to the number control function installed in the host control device is implemented in performing group control, the load range that can be handled by one group is 1 It is wider than the load range that can be handled by one unit. Therefore, depending on the invention described in Patent Document 1, for example, when another unit is started up in a state where 10 units are operating in the operating group, the number of units operated in the operating group Is connected to the group in order to change from 10 units to 5 units, and to control with a sudden change such that the number of units in the newly activated group changes from 0 units to 5 units. It is not possible to perform control that does not change the number of units operated rapidly.

In order to solve the above problems, according to a first embodiment of the present invention, there is provided a heat source control device, a plurality of group control unit for assigning a start stop and load a plurality of heat source units included in the heat source unit A unit control unit for starting and stopping the heat source group and assigning a load, and the group control unit has a characteristic value corresponding to the number of operating heat source units within a predetermined range based on the characteristic value of each heat source unit. It has an optimum load range output unit for outputting the optimum load range of the count control unit, count control unit, in response to the required load exceeds the optimum load range, the load after increasing the number of active heat source group When the load assigned by the number control unit is larger than the optimum load range, the group control unit increases the number of operating heat source units included in the heat source group and updates the optimum load range, The group control unit If the load assigned by the count control unit is smaller than the optimal load range, while decreasing the number of operating heat source units included in the heat source unit, and updates the optimum load range.

According to the second aspect of the present invention, a plurality of group control units that perform start / stop of a plurality of heat source units included in the heat source group and load assignment, and a number control unit that performs start / stop of the heat source group and load assignment, The group control unit includes an optimum load range output unit that outputs to the unit control unit an optimum load range in which a characteristic value corresponding to the number of operating heat source units falls within a predetermined range based on the characteristic value of each heat source unit. Based on the characteristic value of each heat source unit, an operable load range output unit that outputs an operable load range in which the characteristic value corresponding to the number of units larger than the number of operating heat source units is a specific range to the unit control unit The number control unit assigns the load after increasing the number of activations of the heat source group in response to the required load exceeding the optimum load range, and the group control unit assigns the load by the number control unit. Load When larger than the operable load range, the number of operating heat source units included in the heat source group is increased, and the optimum load range and the operable load range are updated, and the group control unit is assigned by the number control unit. When the load is smaller than the operable load range, the number of operating heat source units included in the heat source group is decreased, and the optimum load range and the operable load range are updated.

The optimum load range output unit uses the COP information indicating the relationship between the coefficient of performance and the load factor as a characteristic value, and outputs the load range in which the characteristic value is equal to or greater than a predetermined value to the unit control unit as the optimum load range. The range output unit may output a load range in which the characteristic value is equal to or greater than a predetermined value to the number control unit as an operable load range.

The optimum load range output unit uses the inverter input information as a characteristic value, and outputs the load range in which the characteristic value is equal to or less than the predetermined value to the number control unit as the optimum load range. The operable load range output unit has a predetermined characteristic value. A load range that is less than or equal to the value may be output to the number control unit as an operable load range.

According to the 3rd form of this invention, it is a heat source system, Comprising: The said heat source control apparatus and the heat source group of a some heat source unit are provided.

The heat source control device may be provided on the outlet side of the water supplied to the heat source unit.

According to a fourth aspect of the present invention, there is provided a heat source control method , comprising: a group control stage that performs start / stop and load assignment of a plurality of heat source units included in a heat source group; The group control stage includes an optimum load range stage that outputs an optimum load range in which the characteristic value corresponding to the number of operating heat source units falls within a predetermined range based on the characteristic value of each heat source unit. In the unit control stage, the load is allocated after increasing the number of startups of the heat source group in response to the required load exceeding the optimum load range, and in the group control stage, the load is allocated in the unit control stage. If the assigned load is larger than the optimum load range, the number of operating heat source units included in the heat source group is increased and the optimum load range is updated and assigned in the unit control stage. If obtained load is smaller than the optimal load range, while decreasing the number of operating heat source units included in the heat source unit, and updates the optimum load range.

According to the fifth aspect of the present invention, there is provided a heat source control method, a group control stage for performing start / stop and load assignment of a plurality of heat source units included in the heat source group, and start / stop of the heat source group and load assignment. The group control stage outputs an optimum load range output that outputs an optimum load range in which the characteristic value corresponding to the number of operating heat source units falls within a predetermined range based on the characteristic value of each heat source unit. And an operable load range output stage for outputting an operable load range in which a characteristic value corresponding to a larger number of units than the number of operating heat source units is a specific range based on the characteristic value of each heat source unit. In the unit control stage, in response to the required load exceeding the optimum load range, the load allocation is performed after increasing the number of activations of the heat source group. In the group control stage, the unit control stage If the assigned load is larger than the operable load range, the number of operating heat source units included in the heat source group is increased and the optimum load range and the operable load range are updated and assigned in the unit control stage. When the applied load is smaller than the operable load range, the number of operating heat source units included in the heat source group is decreased, and the optimum load range and the operable load range are updated.

  It should be noted that the above summary of the invention does not enumerate all the necessary features of the present invention. Also, a sub-combination of these feature groups can also be an invention.

  As is apparent from the above description, according to the present invention, the number of operating heat source units included in a plurality of heat source groups can be controlled so as not to cause a rapid change.

It is a figure showing an example of system configuration of heat source system 100 concerning a 1st embodiment. It is a block block diagram of each group control apparatus 11,21. It is a figure which shows the COP characteristic applied to the heat-source system 100. It is a figure which shows the electric energy consumption characteristic applied to the heat source system. 3 is a flowchart illustrating a basic control operation of the heat source system 100. 3 is a flowchart illustrating a specific control operation of the heat source system 100. 3 is a flowchart illustrating a specific control operation of the heat source system 100. It is a flowchart explaining the basic control operation of the heat source system 100 of 2nd Embodiment. It is a flowchart explaining the basic control operation | movement of the heat-source system 100 of 3rd Embodiment.

  Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the claimed invention, and all combinations of features described in the embodiments are described below. However, this is not always essential for the solution of the invention.

  FIG. 1 shows an example of a system configuration of a heat source system 100 according to the first embodiment. Here, the heat source system 100 is a system that controls a plurality of heat sources.

  The heat source system 100 includes a first heat source group 10, a first group control device 11, a second heat source group 20, a second group control device 21, and a number control device 30.

  The first heat source group 10 includes a plurality of heat source units 12. Here, the heat source unit 12 is a unit including a heat source device and a unit control board 13. Each heat source unit 12 has an input side connected to the water inlet 41 and an output side connected to the water outlet 42. The output side of each heat source unit 12 is connected to the first group control device 11 and the number control device 30. In controlling the heat source unit 12, the first group control device 11 receives necessary data from the unit control board 13 and transmits control data to the unit control board 13. Then, the first group control device 11 performs start / stop of each heat source unit 12 and load assignment.

  The second heat source group 20 is connected in parallel to the first heat source group 10 and includes a plurality of heat source units 22. Here, the heat source unit 22 is a unit including the heat source device and the unit control board 23. Each heat source unit 22 has an input side connected to the water inlet 41 and an output side connected to the water outlet 42. The output side of each heat source unit 22 is connected to the second group control device 21 and the number control device 30. In controlling the heat source unit 22, the second group control device 21 receives necessary data from the unit control board 23 and transmits control data to the unit control board 23. Here, the data received from the unit control board 23 also includes COP information indicating the relationship between the coefficient of performance and the load factor of each heat source unit 12, 22. And the 1st group control apparatus 11 performs starting stop of each heat-source unit 22, and allocation of load.

  The number control device 30 performs start / stop of the first heat source group 10 and the second heat source group 20 and load assignment. When viewed from the number control device 30, the first heat source group 10 and the second heat source group 20 are each handled in the same manner as a large-capacity refrigerator.

  FIG. 2 shows a block diagram of each group control device 11, 21. As shown in FIG. 2, each group control device 11, 21 is based on COP information as a characteristic value indicating the relationship between the coefficient of performance of each heat source unit 12, 22 and the load factor, The first operating range output units 14 and 24 output the load range in which the coefficient of performance corresponding to the number of 22 is a predetermined value or more to the number control device 30 as the first proper operating range.

  Based on the COP information, each of the group control devices 11 and 21 sets a load range in which the coefficient of performance corresponding to a predetermined number greater than the number of operating heat source units 12 and 22 is equal to or greater than a predetermined value as a second proper operation range. Second operation range output units 15 and 25 that output to the number control device 30 are included.

  The number control device 30 increases the number of activations of the heat source groups 10 and 20 when the required load exceeds the first proper operation range.

  The heat source system 100 has an optimum load range corresponding to the number of operating units and an operable load range corresponding to the number of operating units + 1 among the heat source units 12 and 22 connected to the group control devices 11 and 21. The data is transmitted from each group control device 11, 21 to the number control device 30. Specifically, for example, when 10 heat source units 12 are connected to the first group control device 11 and one unit is operating, the optimum load range for one unit and the operable load range for two units are determined. Set the optimum load range and operable load range for the entire group.

  When all the units of the heat source units 12 and 22 connected to the group control devices 11 and 21 are stopped, the heat source system 100 includes an optimum load range and an operable load range for one unit. Is the data transmitted from each group control device 11, 21 to the number control device 30.

  When there are units in operation in each of the heat source groups 10 and 20, the number control device 30 determines the optimum load range and the operable load range of each of the heat source groups 10 and 20 from the following formulas (1) to (12). Use to set.

  In the formulas (1) to (6), the optimum load range Hi side of each heat source group 10, 20 is Loh_gi, Lo side is Lol_gi, the operable load range Hi side is Lh_gi, Lo side is Ll_gi, and the operating unit can be operated. The load range Hi side is Loph_gi, the Lo side is Lopl_gi (i = 1 to 20), the optimum load range Hi side of each heat source unit 12 and 22 is Loh_gkui, the Lo side is Lol_gkui, the operable load range Hi side is Lh_gkui, Lo The side is Ll_gkui (k = 1 to 6, i = 1 to 20), and the number of operating units is m.

  In Expressions (7) to (12), the optimum load range Hi side of each heat source group 10, 20 is Loh_gi, the Lo side is Lol_gi, the operable load range Hi side is Lh_gi, and the Lo side is Ll_gi (i = 1 to 20). ), The optimum load range Hi side of each heat source unit 12, 22 is Loh_gkui, the Lo side is Lol_gkui, the operable load range Hi side is Lh_gkui, and the Lo side is Ll_gkui (k = 1 to 6, i = 1 to 20), The number of operating units is zero.

  FIG. 3 is a diagram showing COP characteristics applied to the heat source system 100. The information on the COP characteristic indicates the relationship between the coefficient of performance and the load factor of each heat source unit 12, 22 and is included in the data received from the unit control board 23. In FIG. 3, the refrigeration capacity is shown on the horizontal axis and the COP value is shown on the vertical axis. As shown in FIG. 3, the COP characteristic has a parabolic characteristic when the outside air temperature is, for example, 15 ° C., 25 ° C., or 32 ° C., according to an increase in the freezing capacity. At this time, the proper operation range is a load range that is a predetermined value or more.

  FIG. 4 is a diagram showing power consumption characteristics applied to the heat source system 100. In FIG. 4, the refrigeration capacity is shown on the horizontal axis and the inverter input is shown on the vertical axis. As shown in FIG. 4, the power consumption characteristic has a characteristic that increases in direct proportion to an increase in the freezing capacity when the outside air temperature is 15 ° C., 25 ° C., or 32 ° C., for example. At this time, the proper operation range is a load range that is equal to or less than a predetermined value.

  FIG. 5 is a flowchart illustrating a basic control operation of the heat source system 100. As shown in FIG. 5, when the control is started, the number control device 30 first determines whether or not there is a heat source unit in operation in each of the heat source groups 10 and 20 (S101).

  When there are units in operation in the heat source groups 10 and 20, the number control device 30 determines the optimum load range and the operable load range of the entire heat source groups 10 and 20 from the above formulas (1) to (6). (S102).

  When there is no unit in operation in each heat source group 10, 20, the number control device 30 determines the optimum load range and the operable load range of each heat source group 10, 20 from the above formulas (7) to (12). (S103).

  6 and 7 are flowcharts illustrating a specific control operation of the heat source system 100. FIG. FIG. 6 shows a case where the first heat source group 10 is operated first. As shown in FIG. 6, when the control is started, first, the number control device 30 starts the operation and issues a group operation command (S111). Since the group operation command is transmitted to the first group control device 11, the first group control device 11 is started to operate (S112).

  The first group control device 11 transmits the optimum load range and the operable load range calculated by the equations (1) to (6) to the number control device 30 (S113). The optimum load range and the operable load range are periodically transmitted to the number control device 30.

  At this time, the second group control device 21 transmits the optimum load range and the operable load range calculated by the equations (7) to (12) to the number control device 30 (S114). The optimum load range and the operable load range are periodically transmitted to the number control device 30.

  The number control device 30 determines whether or not the required load is larger than the optimum load range during operation (S115). The second group control device 21 starts operation when the number control device 30 determines that the required load is larger than the optimum load range during operation (S116).

Thereafter, the first group control device 11 calculates the optimum load range calculated by the equations (1) to (6),
The operable load range is periodically transmitted to the number control device 30 (S117).

  The second group control device 21 periodically transmits the optimum load range and the operable load range calculated by the equations (1) to (6) (S118).

  Next, the number control device 30 transmits the load allocation to the first group control device 11 and the second group control device 21. The first group control device 11 determines whether or not the allocated load is larger than the load range that can be handled by the number of units in operation (S119). When it is determined that the load allocated by the number control device 30 is larger than the load range that can be handled by the number of units in operation, the first group control device 11 increases the number of unit operations in the heat source group (S120). Further, the first group control device 11 does not change the unit operation number when it is determined that the allocated load by the number control device 30 is not larger than the load range that can be handled by the operation number.

  The second group control device 21 determines whether or not the allocated load is larger than the load range that can be handled by the number of operating units (S121). When it is determined that the assigned load by the number control device 30 is larger than the load range that can be handled by the number of units in operation, the second group control device 21 increases the number of unit operations in the heat source group (S122). Further, the second group control device 21 does not change the unit operation number when the assigned load by the number control device 30 is not larger than the load range that can be handled by the number of operating units.

  Subsequently, the first group control device 11 determines whether or not the allocated load is smaller than a load range that can be handled by the number of operating units (S123). When it is determined that the assigned load by the number control device 30 is smaller than the load range that can be handled by the number of units in operation, the first group control device 11 decreases the number of unit operations in the heat source group (S124). Further, the first group control device 11 does not change the unit operation number when the assigned load by the number control device 30 is not smaller than the load range that can be handled by the number of operating units.

  The second group control device 21 determines whether or not the allocated load is smaller than the load range that can be handled by the number of units in operation (S125). When it is determined that the load allocated by the number control device 30 is smaller than the load range that can be handled by the number of units in operation, the second group control device 21 decreases the number of unit operations in the heat source group (S126). The second group control device 21 does not change the unit operation number when it is determined that the allocated load by the number control device 30 is not smaller than the load range that can be handled by the number of operating units.

  The number control device 30 determines whether or not the required load is smaller than the optimum load range during operation (S127). When it is determined that the requested load is smaller than the optimum load range during operation, the number control device 30 issues a stop command to the first group control device 11, and therefore the first group control device 11 The operation is terminated (S128). At this time, when the group in operation is only one of the first heat source groups 10, the stop command is not issued.

  When it is determined that the required load is not smaller than the optimal load range during operation, the number control device 30 determines whether only the second heat source group 20 is operating (S129). If it is determined that only the second heat source group 20 is operating, the number control device 30 proceeds to (S145) shown in FIG. When it is determined that only the second heat source group 20 is not operating, the number control device 30 determines whether only the first heat source group 10 is operating (S130). When it is determined that only the first heat source group 10 is operating, the number control device 30 proceeds to (S115), and the number control device 30 is determined that only the first heat source group 10 is not operating. If so, the process proceeds to (S117) and the routine is repeated.

  FIG. 7 shows a case where the second heat source group 20 is operated first. As shown in FIG. 7, when the control is started, first, the number control device 30 starts the operation and issues a group operation command (S141). Since the group operation command is transmitted to the second group control device 21, the second group control device 21 is started to operate (S142).

  The second group control device 21 transmits the optimum load range and the operable load range calculated by the equations (1) to (6) to the number control device 30 (S143). The optimum load range and the operable load range are periodically transmitted to the number control device 30.

  At this time, the first group control device 11 transmits the optimum load range and the operable load range calculated by the equations (7) to (12) to the number control device 30 (S144). The optimum load range and the operable load range are periodically transmitted to the number control device 30.

  The number control device 30 determines whether or not the required load is larger than the optimum load range during operation (S145). The first group control device 11 starts operation when the number control device 30 determines that the required load is larger than the optimum load range during operation (S146).

  Thereafter, the first group control device 11 periodically transmits the optimum load range and the operable load range calculated by the equations (1) to (6) to the number control device 30 (S147).

  The second group control device 21 periodically transmits the optimum load range and the operable load range calculated by the equations (1) to (6) (S148).

  Next, the number control device 30 transmits the load allocation to the first group control device 11 and the second group control device 21. The first group control device 11 determines whether or not the allocated load is larger than the load range that can be handled by the number of operating units (S149). When it is determined that the load allocated by the number control device 30 is larger than the load range that can be handled by the number of operating units, the first group control device 11 increases the number of unit operations in the heat source group (S150). Further, the first group control device 11 does not change the unit operation number when it is determined that the allocated load by the number control device 30 is not larger than the load range that can be handled by the operation number.

  The second group control device 21 determines whether or not the allocated load is larger than the load range that can be handled by the number of operating units (S151). When it is determined that the load allocated by the number control device 30 is larger than the load range that can be handled by the number of units in operation, the second group control device 21 increases the number of unit operations in the heat source group (S152). The second group control device 21 does not change the unit operation number when it is determined that the allocated load by the number control device 30 is not larger than the load range that can be handled by the number of units in operation.

  Subsequently, the first group control device 11 determines whether or not the allocated load is smaller than the load range that can be handled by the number of units in operation (S153). When it is determined that the load allocated by the number control device 30 is smaller than the load range that can be handled by the number of units in operation, the first group control device 11 decreases the number of unit operations in the heat source group (S154). Further, the first group control device 11 does not change the unit operation number when it is determined that the allocated load by the number control device 30 is not smaller than the load range that can be handled by the number of operating units.

  The second group control device 21 determines whether or not the allocated load is smaller than the load range that can be handled by the number of operating units (S155). When it is determined that the assigned load by the number control device 30 is smaller than the load range that can be handled by the number of units in operation, the second group control device 21 decreases the number of unit operations in the heat source group (S156). The second group control device 21 does not change the unit operation number when it is determined that the allocated load by the number control device 30 is not smaller than the load range that can be handled by the number of operating units.

  The number control device 30 determines whether or not the required load is smaller than the optimum load range during operation (S157). When it is determined that the required load is smaller than the optimum load range during operation, the number control device 30 issues a stop command to the second group control device 21, so the second group control device 21 The operation is terminated (S158). At this time, when it is determined that the number of operating groups is only one of the second heat source groups 20, the unit control device 30 does not issue a stop command.

  When it is determined that the required load is not smaller than the optimum load range during operation, the number control device 30 determines whether only the first heat source group 10 is operating (S159). If it is determined that only the first heat source group 10 is operating, the number control device 30 proceeds to (S115) shown in FIG. When it is determined that only the first heat source group 10 is not operating, the number control device 30 determines whether only the second heat source group 20 is operating (S160). When it is determined that only the second heat source group 20 is operating, the number control device 30 proceeds to (S145), and the number control device 30 is determined that only the second heat source group 20 is not operating. If so, the process proceeds to (S147) and the routine is repeated.

  As described above, when the heat source system 100 according to the present embodiment tries to deviate from the optimum load range, the operation of increasing the heat source group first is performed. Therefore, it is possible to first increase the number of heat source groups to be operated in a state where only one of the heat source units 12 and 22 connected to the heat source system 100 and the heat source groups 10 and 20 is operating. Therefore, even when the load distribution is equally divided for each heat source group 10, 20, the number of operating heat source units 12, 22 connected to each heat source group 10, 20 is rapidly increased. It can be controlled not to change.

  In addition, the heat source system 100 of the present embodiment performs unit control and load distribution on the plurality of heat source groups 10 and 20 without greatly changing the number of operating heat source units 12 and 22 connected to the heat source groups 10 and 20. In addition, it is possible to keep the optimum operating state with low power consumption as the operating state of each heat source unit 12, 22.

  Next, the second embodiment will be described with reference to FIG. 8, but the same parts as those in the first embodiment are denoted by the same reference numerals, description thereof will be omitted, and only different points will be described. FIG. 8 is a flowchart illustrating a basic control operation of the heat source system 100 according to the second embodiment.

  The heat source system 100 determines the number of operating heat source units in each heat source group 10, 20 when the load distribution from the number control device 30 to each heat source group 10, 20 is larger than the operable load range for the number of operating heat source units. While increasing, the optimum load range and the operable load range are updated. Specifically, in the heat source system 100, for example, ten heat source units 12 are connected to the first group control device 11 (the load range that can be handled by the entire heat source group is set to 100%), and one heat source system ( If the load distribution from the number control device 30 is greater than 10%, the number of operating units is updated from one to two and the optimum for two heat source units. The load range and the operable load range for three heat source units are set as the optimum load range and the operable load range of the entire heat source group.

  As shown in FIG. 8, when the control is started, first, the first group control device 11 and the second group control device 21 have a load distribution larger than the operable load range Hi side of the operating heat source unit. Whether or not (S201).

  When there is a load distribution larger than the operable load range Hi side of the operating heat source unit, the first group control device 11 and the second group control device 21 increase the number of operating heat source units, and each heat source group 10, 20 The entire optimum load range and operable load range are updated.

  At this time, the first group control device 11 and the second group control device 21 terminate the process when there is no load distribution larger than the operable load range Hi side of the operating heat source unit.

  The heat source system 100 according to the present embodiment, as viewed from the number control device 30, after all of the subordinate heat source groups 10 and 20 are in one heat source unit operation state, by increasing the load allocation, The number of operating heat source units in 20 can be automatically increased.

  Next, the third embodiment will be described with reference to FIG. 9, but the same parts as those in the first embodiment are denoted by the same reference numerals, the description thereof will be omitted, and only different points will be described. FIG. 9 is a flowchart illustrating a basic control operation of the heat source system 100 according to the third embodiment.

  When the load distribution from the number control device 30 to the heat source group is smaller than the operable load range with respect to the number of operating heat source units, the heat source system 100 reduces the number of operating heat source units in the heat source groups 10 and 20 and is optimal. Update the load range and the operable load range, respectively. Specifically, for example, 10 heat source units are connected to each of the group control devices 11 and 21 (the load range that can be handled by the entire heat source group is assumed to be 100%), and 2 units are operating (corresponding to the operating state). If the load distribution from the number control device 30 is less than 20%, the number of operating units is updated from two to one and the optimum load range for one heat source unit is 2 The operable load range for the heat source unit is set as the optimum load range and the operable load range for the entire group.

As shown in FIG. 9, when the control is started, first, the first group control device 11 and the second group control device 21 have a load distribution smaller than the operable load range Lo side of the operating heat source unit. Whether or not (S301).
When there is a load distribution smaller than the operable load range Lo of the operating heat source unit, the first group control device 11 and the second group control device 21 decrease the number of operating heat source units, and each heat source group 10, 20 The entire optimum load range and operable load range are updated.

  At this time, the first group control device 11 and the second group control device 21 terminate the process when there is no load distribution smaller than the operable load range Lo side of the operating heat source unit.

  The heat source system 100 according to the present embodiment is configured so that the heat source units in the heat source groups 10 and 20 are reduced by reducing the load assignment after all of the subordinate groups are in the plural unit operation state when viewed from the number control device 30. The number of operating units can be automatically reduced.

  The heat source system and the heat source control method are not limited to the above-described embodiments, and appropriate modifications and improvements can be made.

DESCRIPTION OF SYMBOLS 100 Heat source system 10 1st heat source group 11 1st group control apparatus 12, 22 Heat source unit 13, 23 Unit control board 14, 24 1st operation range output part 15, 25 2nd operation range output part 20 2nd heat source group 21 1st Second group control device 30 Number control device 41 Water inlet 42 Water outlet

Claims (8)

A plurality of group control unit for assigning a start stop and load a plurality of heat source units included in the heat source unit,
A unit controller for starting and stopping the heat source group and assigning a load, and
The group controller is
On the basis of the characteristic values of the heat source units, the optimal load range output portion in which the characteristic value corresponding to the number of the heat source units in operation is output before Symbol count control unit the optimum load range of the predetermined range
Have,
The count control unit, in response to the required load exceeds the optimum load range, allocates a load after increasing the number of startup of said heat source unit,
When the load assigned by the number control unit is larger than the optimum load range, the group control unit increases the number of operating heat source units included in the heat source group and updates the optimum load range.
The group control unit, when the load assigned by the unit control unit is smaller than the optimum load range, to reduce the number of operating heat source units included in the heat source group, and to update the optimum load range. A heat source control device. A plurality of group control units for starting and stopping a plurality of heat source units included in the heat source group and assigning loads; and
A unit control unit for starting and stopping the heat source group and assigning a load;
With
The group controller is
Based on the characteristic value of each heat source unit, an optimum load range output unit that outputs an optimum load range in which the characteristic value corresponding to the number of the heat source units in operation falls within a predetermined range to the number control unit,
Based on the characteristic value of each heat source unit, the operable load range in which the operable value range corresponding to the number of units larger than the number of operating heat source units is a specific range is output to the unit control unit. Output section and
Have
In response to the demand load exceeding the optimum load range, the number control unit performs load allocation after increasing the number of activations of the heat source group,
When the load allocated by the number control unit is larger than the operable load range, the group control unit increases the number of operating heat source units included in the heat source group, and the optimum load range and the operable Update the load range,
When the load assigned by the number control unit is smaller than the operable load range, the group control unit decreases the number of operating heat source units included in the heat source group, and the optimum load range and the operable Update with load range
A heat source control device characterized by that. The optimum load range output section, the COP information representing the relationship between the coefficient of performance and the load factor and the characteristic value, the output to the count control unit the load range in which the characteristic value is equal to or greater than a predetermined value as the optimum load range And
Before Kiun rolling possible load range output section, the heat source control device according to claim 2, characterized in that the output load range in which the characteristic value is equal to or more than a predetermined value to the count control unit as the operable load range . The optimum load range output section, the inverter input information and the characteristic value, and outputs the count control unit the load range in which the characteristic value is equal to or less than a predetermined value as the optimum load range,
Before Kiun rolling possible load range output section, the heat source control device according to claim 2, characterized in that the output load range in which the characteristic value is equal to or less than a predetermined value to the count control unit as the operable load range . The heat source control device according to any one of claims 1 to 4 ,
A heat source system comprising: a heat source group of the plurality of heat source units. The heat source control device is provided on the outlet side of the water supplied to the heat source unit.
The heat source system according to claim 5. And row Cormorant group controlling step the allocation of start stop and load a plurality of heat source units included in the heat source unit,
And a number controlling step for performing allocation of the heat source unit of start and stop and load,
The group control step includes:
On the basis of the characteristic values of the heat source units, the optimal load range stage where the characteristic value corresponding to the number of the heat source unit in operation to output the optimum load range of the predetermined range
Including
In the volume control step, in response to the required load exceeds the optimum load range, allocates a load after increasing the number of startup of said heat source unit,
In the group control stage, when the load allocated in the number control stage is larger than the optimum load range, the number of operating heat source units included in the heat source group is increased, and the optimum load range is updated, When the load allocated in the number control step is smaller than the optimum load range, the number of operating heat source units included in the heat source group is reduced and the optimum load range is updated. . A group control stage for starting and stopping a plurality of heat source units included in the heat source group and assigning loads;
A unit control stage for starting and stopping the heat source group and assigning a load; and
Including
The group control step includes:
Based on the characteristic value of each heat source unit, an optimum load range output stage for outputting an optimum load range in which the characteristic value corresponding to the number of the heat source units in operation falls within a predetermined range;
Based on the characteristic value of each heat source unit, an operable load range output stage for outputting an operable load range in which the characteristic value corresponding to a larger number than the number of operating heat source units is a specific range;
Including
In the number control stage, in response to the required load exceeding the optimum load range, assigning the load after increasing the number of activation of the heat source group,
In the group control stage, when the load assigned in the number control stage is larger than the operable load range, the number of operating heat source units included in the heat source group is increased, and the optimum load range and the operation are increased. The possible load range is updated, and when the load allocated in the unit control stage is smaller than the operable load range, the number of operating heat source units included in the heat source group is reduced, and the optimum load range and the Update the operable load range
The heat source control method characterized by the above-mentioned.

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