JP5140341B2 - Heat source control device and heat source control method - Google Patents

Description

  The present invention relates to a heat source control device and a heat source control method for controlling the operation of a heat source such as a refrigerator or a heater.

  Conventionally, in tenant buildings, etc., a heat source system having a plurality of heat sources and a pump provided as an auxiliary machine for each of these heat sources as a main component has been provided, and the heat medium pumped from the pump is cooled or heated by the heat source. These are mixed in the forward header and supplied to an external device such as an air conditioner or a fan coil unit through the forward water pipeline. The heat medium subjected to heat exchange in the load device is returned to the return header through the return water pipe, is pumped again by the pump, and circulates through the above path. For example, when the heat source is a refrigerator, the heat medium is cold water and circulates through the above-described path. When the heat source is a heater, the heat medium is warm water and circulates through the above-described path (for example, see Patent Document 1).

  The heat source system is provided with a heat source control device that controls the operation of the heat source. The heat source control device measures the flow rate (load flow rate) F of the heat medium returned to the return header, and controls the operation (start / stop) of the heat source according to the measured load flow rate F. Alternatively, from the temperature of the heat medium sent from the forward header (outward water temperature) TS, the temperature of the heat medium returned to the return header (return water temperature) TR, and the flow rate of the heat medium returned to the return header (load flow rate) F , F × (TR−TS) × specific heat = Q, the load heat quantity Q is obtained, and the operation (start / stop) of the heat source is controlled according to the obtained load heat quantity Q.

  For example, according to a predetermined operation order table, the heat source of the designated rank 1 is operated until the load heat quantity Q reaches a predetermined value Q1, and if the load heat quantity Q exceeds the predetermined value Q1, the heat source of the designated rank 1 In addition to this, the operation of the heat source of the designated rank 2 is started. Thereafter, when the load heat quantity Q becomes equal to or less than a predetermined value Q1 '(Q1' <Q1), the operation of the heat source unit of the designated rank 2 is stopped. When the operation of the heat source is started, the operation of the pump that is an auxiliary machine of the heat source is also started. If the operation of the heat source is stopped, the operation of the pump that is an auxiliary machine of the heat source is also stopped.

  Normally, tenant buildings, etc. have a power demand contract with a power company for power consumption, and it is necessary to control the power consumption so as not to exceed the target power according to this power demand contract. . Therefore, the time zone in which the power consumption is highest in a day is set as a peak cut time zone (for example, 13:00:00 to 16:00). The operation of a large heat source (for example, a centrifugal chiller) is stopped, and instead, a heat source that consumes less power (for example, an absorption chiller) is started to replace the heat source (for example, Patent Document 2). Since the turbo chiller uses electricity as an energy source and the absorption chiller uses gas as an energy source, the absorption chiller consumes less power than the turbo chiller even if the capacity is the same.

Japanese Patent Laid-Open No. 2000-18684 JP 2001-50570 A

  However, in the conventional heat source control device, since the heat sources are replaced at a time at the start time of the peak cut time zone, there is a problem that the more the number of heat sources that can be replaced, the worse the indoor environment. It was.

  For example, it is assumed that two types of heat sources are a turbo chiller and an absorption chiller, and two turbo chillers are operated as a state immediately before entering a peak cut time zone. It is assumed that the capacity of the turbo refrigerator and the absorption refrigerator are equal, the rise time of the turbo refrigerator is 10 minutes, and the rise time of the absorption refrigerator is 25 minutes. In this case, at the start time of the peak cut time zone (point ts shown in FIG. 12 (a)), two operating centrifugal chillers are stopped simultaneously, and two stopped absorption chillers are started simultaneously. . Here, the absorption chiller requires 25 minutes as a rise time, and the water supply temperature (cold water temperature) to the external device is as shown in FIG. 12B until the two absorption chillers start up. It will rise. The amount of increase Δt in the water supply temperature increases as the number of heat sources to be replaced increases, and thereby the indoor environment is significantly deteriorated.

  The present invention has been made to solve such a problem, and the object of the present invention is to provide a heat source capable of replacing the heat source in the peak cut time period without causing a significant deterioration of the indoor environment. A control device and a heat source control method are provided.

In order to achieve such an object, the first invention (the invention according to claim 1) prohibits the operation of a part or all of the first type heat source in a peak cut time zone in which energy consumption is suppressed. In addition, in the heat source control device that operates the second type heat source that consumes less energy than the first type heat source instead of the first type heat source that prohibits the operation, the operation is performed before entering the peak cut time zone. Among the first type heat sources in the middle, the time of the plurality of first type heat sources whose operation is prohibited in the peak cut time zone is shifted and sequentially stopped, and is stopped in place of the stopped first type heat source. the heat source replacement means activates the second type of heat source is provided, the heat source replacement means, in response to a first type of operation prohibition number defined as the number of heat sources operating at peak cut time zone is prohibited its A means for setting the replacement preparation time zone in which the time width is determined immediately before the peak cut time zone, and all the first type heat sources that are stopped at the start time of the replacement preparation time zone that are equal to or less than the number of operation prohibited as start-up prohibited heat sources After the elapse of a predetermined waiting time corresponding to the number of start-prohibited heat sources from the start time of the replacement preparation time zone, the number of units that are in operation are deducted from the number of start-prohibited heat sources minus the number of start-prohibited heat sources. The first heat source is sequentially stopped at different times, and the second type heat source is started in place of the stopped first type heat source . The time width when the types of heat sources are sequentially stopped is set to be equal to the rise time of the second type heat source.

For example, in the present invention, the first type of heat source is a turbo chiller, the second type of heat source is an absorption chiller, and the turbo chiller and the absorption chiller have the same capacity, and the turbo chiller in the peak cut time zone When the number of prohibited operations is two, before entering the peak cut time period, all stopped turbo chillers below the number of prohibited operations are prohibited from starting as a start-up prohibition heat source , and one in operation The first turbo refrigerator is stopped, and the first absorption refrigerator that is stopped is started instead. Then, the second turbo chiller in operation is stopped by shifting the time width equal to the rise time of the first absorption chiller, and the second absorption type being stopped instead. The refrigerator is activated. In this case, before entering the peak cut time zone, the turbo chiller and the absorption chiller are replaced one by one at a time, so the amount of increase in the water supply temperature (cold water temperature) is reduced, The environment will not be significantly degraded. In addition, the turbo chiller is not started / stopped unnecessarily immediately before the peak cut time period.

Further, in the second invention (the invention according to claim 2), in the configuration of the first invention , the time width of the replacement preparation time zone is equal to the time obtained by multiplying the rising time of the second type heat source by the number of prohibited operations. It is a time width .

The present invention can be realized not only as a heat source control device but also as a heat source control method. The invention according to claim 3 (third invention) is the heat source control device of the first invention realized as a heat source control method, and the invention according to claim 4 (fourth invention) is the heat source control of the second invention. The apparatus is realized as a heat source control method .

According to the present invention, before entering the peak cut time zone, all the first type heat sources that are stopped or less are prohibited from being used as start-up prohibition heat sources, and the start-up is prohibited . Among the types of heat sources, the time of the plurality of first type heat sources whose operation is prohibited in the peak cut time zone is shifted sequentially by a time width equal to the rise time of the second type of heat source, and the first Since the stopped second type heat source is started instead of the type heat source, for example, the first type heat source is a turbo refrigerator, the second type heat source is an absorption type refrigerator, and the turbo refrigerator Assuming that the capacity of the absorption chiller is equal, before entering the peak cut time zone, the replacement of the turbo chiller and the absorption chiller is time by time equal to the rise time of the absorption chiller one by one. Shift Carried out as the result, to reduce the amount of increase of the water temperature (cold water temperature), it becomes possible to prevent incurring significant deterioration of indoor environment. In addition, before entering the peak cut time zone, the start of all stopped turbo chillers that are less than the number of operations prohibited is prohibited, and the turbo chiller is wasted / started uselessly just before the peak cut time zone. It will not be.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is an instrumentation diagram showing a main part of an embodiment of a heat source system using a heat source control device according to the present invention.

  In FIG. 1, 1-1 and 1-2 are turbo refrigerators (first type heat source), 2-1, 2-2, and 2-3 are absorption type refrigerators (second type heat source), P1, P2. Is a pump provided as an auxiliary device in the circulation path of cold water generated by the turbo refrigerators 1-1 and 1-2, and P3, P4 and P5 are absorption refrigerators 2-1, 2-2 and 2-3. Each of the pumps provided as an auxiliary device in the chilled water circulation passage generated by the chilled water 3 is chilled water from the turbo chillers 1-1, 1-2 and the absorption chillers 2-1, 2-2, 2-3. Outbound header to be mixed, 4 is a forward water line, 5 is an external device such as an air conditioner or a fan coil that receives cold water sent from the forward header 3 via the forward water line 4, and 6 is an external device 5 A flow rate control valve 7 for adjusting the inflow amount of cold water is a return water pipe line.

  8 is a return header in which the cold water sent through the return water pipe 7 is exchanged by heat exchange in the external device 5, 9 is a bypass pipe that connects the forward header 3 and the return header 8, and 10 is from the forward header 3. A water supply temperature sensor that measures the temperature of the cold water to the external device 5 as the water supply temperature TS, 11 is a return water temperature sensor that measures the temperature of the cold water returned to the return header 8 as the return water temperature TR, and 12 is returned to the return header 8. A flow meter 13 for measuring the flow rate (load flow rate) F of the cold water to be generated is a heat source control device according to the present invention.

  In this heat source system, the water supplied by the pumps P1 to P5 is converted into cold water by the turbo chillers 1-1 and 1-2 and the absorption chillers 2-1, 2-2 and 2-3. And are supplied to the external device 5 through the water supply line 4. And it heat-exchanges in the external apparatus 5, returns to the return header 8 via the return water pipe 7, is pumped again by the pumps P1-P5, and circulates the above path | route.

  The heat source control device 13 operates (starts / stops) the turbo chillers 1-1, 1-2 and the absorption chillers 2-1, 2-2, 2-3 according to the load flow rate F from the flow meter 12. ) To control. Alternatively, from the water supply temperature TS from the water supply temperature sensor 10 and the return water temperature TR from the return water temperature sensor 11, the load heat quantity Q is obtained as F × (TR−TS) × specific heat = Q, and the obtained load heat quantity is obtained. The operation (start / stop) of the turbo chillers 1-1, 1-2 and the absorption chillers 2-1, 2-2, 2-3 is controlled according to Q.

  If the turbo chillers 1-1 and 1-2 are started / stopped, the pumps P1 and P2 are also started / stopped in conjunction with this. Further, if the absorption refrigerators 2-1, 2-2, 2-3 are started / stopped, the pumps P3, P4, P5 are also started / stopped in conjunction with this.

  In the present embodiment, the capacities of the turbo refrigerator 1 (1-1, 1-2) and the absorption refrigerator 2 (2-1, 2-2, 2-3) are equal. Since the turbo refrigerator 1 uses electricity as an energy source and the absorption refrigerator 2 uses gas as an energy source, the absorption refrigerator 2 consumes more power than the turbo refrigerator 1 even if the capacity is the same. Few.

  FIG. 2 shows an outline of the hardware configuration of the heat source control device 13. In the figure, 13A is a CPU, 13B is a RAM, 13C is a storage device, and 13D and 13E are interfaces. The CPU 13A operates according to a program stored in the storage device 13C while obtaining input information such as the water supply temperature TS, the return water temperature TR, and the load flow rate F given through the interface 13D and accessing the RAM 13B.

  The storage device 13C has an operation control program for controlling the operation of the turbo chillers 1-1 and 1-2 and the absorption chillers 2-1, 2-2, and 2-3 as a program specific to the present embodiment. Stored. The operation control program is provided in a state where it is recorded on a recording medium such as a CD-ROM, and is read from the recording medium and installed in the storage device 13C.

  Further, in the storage device 13C, in relation to the above-described operation control program, a time zone of “13: 0 to 16:00” is a peak cut time as a time zone in which the power consumption is highest in one day. It is set as a band TA (see FIG. 3). In addition, the operation prohibition number N of the centrifugal chiller 1 in the peak cut time zone TA is set as N = 2, and the start time ts of the peak cut time zone TA is set as the end time t2 immediately before the peak cut time zone TA. A replacement preparation time zone TB is set. Further, an operation order table TC as shown in FIG. 4 is set as a table for determining the starting order of the turbo chillers 1-1 and 1-2 and the absorption chillers 2-1, 2-2 and 2-3. Yes. In this operation sequence table TC, since the same type of heat source is automatically rotated, there may be a startup order in parentheses.

  In the present embodiment, the time width of the replacement preparation time zone TB set immediately before the peak time zone TA is set to prohibit the operation of the turbo chiller 1 in the peak cut time zone TA at the rising time TW1 of the absorption chiller 2. The time width is equal to the time obtained by multiplying the number N. In this example, the rise time TW1 of the absorption refrigerator 2 is set to 25 minutes, and the time width of the replacement preparation time zone TB is obtained by setting TW1 × N = 25 minutes × 2 units = 50 minutes, and “12:10 to 13:00. "Is set as a replacement preparation time zone TB.

  FIG. 5 shows the setting state of the operation prohibition for the turbo chiller 1 in the rise time TW1 of the absorption chiller 2, the rise time TW2 of the turbo chiller 1, and the peak cut time zone TA. In this example, since the number N of turbo chiller 1 operations prohibited in the peak cut time zone TA is N = 2, the turbo chillers 1-1 and 1-2 are regarded as heat sources for which the operation is prohibited in the peak cut time zone TA. The

[Example 1]
Hereinafter, an example (example 1) of the processing operation of the CPU 13A according to the above-described operation control program will be described with reference to the flowchart shown in FIG. In Example 1, three turbo chillers 1-1 and 1-2 and an absorption chiller 2-1 are operated as a state immediately before entering the replacement preparation time zone TB.

  In this case, according to the operation control program, the CPU 13A reads the replacement preparation time zone TB from the storage device 13C and sets it immediately before the peak cut time zone TA (step S100), and the current time is the start time of the replacement preparation time zone TB. If so (YES in step S101, t1 point shown in FIG. 7A), it is checked whether or not the operation prohibited number N is set (step S102). In this example, since the operation prohibited number N is set as N = 2 (YES in step S102), the process proceeds to step S103.

  In step S103, it is checked whether there is a turbo chiller 1 that is currently stopped. If there is a turbo chiller 1 that is currently stopped, the process proceeds to step S104. If there is no turbo chiller 1 that is currently stopped, step S108 is performed. Proceed to In this case, since the turbo chillers 1-1 and 1-2 are both in operation, the process proceeds to step S108.

In step S <b> 108, the CPU 13 </ b> A starts one absorption refrigeration machine 2 having a high start order that is stopped according to the operation order table TC. In this case, since the absorption chiller 2-1 is in operation, the absorption chiller 2-2 is started as the absorption chiller 2 being stopped having a high startup order. At the same time as the activation of the absorption chiller 2-2, one operating centrifugal chiller 1 is stopped (step S109). In this case, since the turbo chillers 1-1 and 1-2 are both in operation, one of the turbo chillers 1-1 and 1-2, for example, the turbo chiller 1-2 having a low starting order is stopped. .

  Then, after the rising time TW1 (25 minutes) of the activated absorption chiller 2-2 has started (YES in step S110, the point ta shown in FIG. 7A), the turbo chiller 1 whose startup is prohibited The sum of the number and the number of turbo chillers 1 whose operation has been stopped is compared with the operation prohibited number N (step S111).

  Note that the number of turbo chillers 1 whose start-up is prohibited in step S111 refers to the number of turbo chillers 1 that are stopped (start-up prohibited heat source number) whose start is prohibited in step S104. The prohibition of activation of the stopped centrifugal chiller 1 in step S104 will be described later.

  In this case, the number of turbo chillers 1 whose start is prohibited is 0, the number of turbo chillers 1 whose operation is stopped is 1, and the sum thereof is not equal to the number N of prohibited operations (N = 2). Therefore (NO in step S111), the process returns to step S108.

  In step S <b> 108, the CPU 13 </ b> A starts one absorption refrigeration machine 2 having a high start order that is stopped according to the operation order table TC. In this case, since the absorption chillers 2-1 and 2-2 are in operation, the absorption chiller 2-3 is started as the absorption chiller 2 being stopped having a high startup order. Simultaneously with the start-up of the absorption chiller 2-3, one operating turbo chiller 1 is stopped (step S109). In this case, since the turbo chiller 1-1 is in operation, the turbo chiller 1-1 is stopped.

  Then, after the rising time TW1 (25 minutes) of the activated absorption chiller 2-3 has started (YES in step S110, point t2 shown in FIG. 7A), the turbo chiller 1 whose startup is prohibited The sum of the number and the number of turbo chillers 1 whose operation has been stopped is compared with the operation prohibited number N (step S111).

  In this case, the number of turbo chillers 1 whose start is prohibited is 0, the number of turbo chillers 1 whose operation has been stopped is 2, and the sum thereof is equal to the number N of prohibited operations (N = 2). Therefore (YES in step S111), the process ends.

  In the processing operation of this example 1, as shown in FIG. 7A, in the replacement preparation time zone TB before entering the peak cut time zone TA, the operating centrifugal chillers 1-1 and 1-2 are stopped. Since the replacement with the internal absorption refrigerators 2-2 and 2-3 is performed one by one at a time, as shown in FIG. 7B, the increase amount Δt of the water supply temperature (cold water temperature) is It becomes small and it does not lead to remarkable deterioration of the indoor environment.

[Example 2]
Next, as another example (example 2) of the processing operation of the CPU 13A according to the above-described operation control program, a case where only the turbo refrigerator 1-1 is operated as a state immediately before entering the replacement preparation time zone TB will be described. To do. Also in this example 2, the operation prohibition number N of the turbo chiller 1 in the peak cut time zone TA is N = 2.

  In this case, according to the operation control program, the CPU 13A reads the replacement preparation time zone TB from the storage device 13C and sets it immediately before the peak cut time zone TA (step S100), and when the current time becomes the start time of the replacement preparation time zone TB. (YES in step S101, (t1 point shown in FIG. 8A)), it is checked whether or not the operation prohibited number N is set (step S102) In this example, the operation prohibited number N is set to N = 2. Since it is set (YES in step S102), the process proceeds to step S103.

  In step S103, it is checked whether there is a turbo chiller 1 that is currently stopped. If there is a turbo chiller 1 that is currently stopped, the process proceeds to step S104. If there is no turbo chiller 1 that is currently stopped, step S108 is performed. Proceed to In this example, since the turbo chiller 1-2 is stopped, the process proceeds to step S104.

  In step S <b> 104, the CPU 13 </ b> A prohibits activation of all the stopped turbo chillers 1 that are equal to or less than the operation prohibited number N. In this case, since the stopped turbo chiller 1 is one of the turbo chillers 1-2, activation of the stopped turbo chiller 1-2 is prohibited. That is, the stopped turbo chiller 1-2 is set as a start-up prohibition heat source.

  Then, a difference between the operation prohibited number N and the number of turbo chillers 1 whose start is prohibited (startup prohibited heat source number) is obtained, and it is checked whether the difference is> 0 (step S105). In this example, since the operation prohibition number N is two and the number of turbo chillers 1 whose start is prohibited is one, the difference is> 0. In this case, since “number of operation prohibited−number of activation prohibited heat sources” is> 0 (YES in step S105), the process proceeds to step S106.

  In step S106, the CPU 13A multiplies the number of turbo chillers 1 whose start is prohibited by the rising time TW1 of the absorption chiller 2 to obtain the waiting time TD. Then, waiting for the waiting time TD to elapse (YES in step S107, point tb shown in FIG. 8 (a)), one of the absorption chillers 2 having a high starting order is started according to the operation order table TC. To do. In this case, the absorption chiller 2-1 is started up as the absorption refrigeration machine 2 in a stopped state having a high startup order. Further, simultaneously with the start-up of the absorption chiller 2-1, one turbo chiller 1 in operation is stopped (step S109). In this case, since only the turbo chiller 1-1 is operating, the turbo chiller 1-1 is stopped.

  Then, after the start-up time TW1 (25 minutes) of the activated absorption chiller 2-1 has elapsed (YES in step S110, t2 shown in FIG. 8A), the turbo chiller 1 whose start is prohibited The sum of the number and the number of turbo chillers 1 whose operation has been stopped is compared with the operation prohibited number N (step S111).

  In this case, the number of turbo chillers 1 whose start is prohibited is one, the number of turbo chillers 1 whose operation is stopped is one, and the sum thereof is equal to the number N (N = 2) of prohibited operations. Therefore (YES in step S111), the process ends.

  In the processing operation of this example 2, as shown in FIG. 8A, in the replacement preparation time zone TB before entering the peak cut time zone TA, the startup of the stopped centrifugal chiller 1-2 is prohibited. Therefore, the turbo chiller 1-2 is not started / stopped uselessly just before the peak cut time zone TA.

  In Example 2, when neither of the centrifugal chillers 1-1 and 1-2 is operated as a state immediately before entering the replacement preparation time zone TB, the turbo chiller 1-1 is determined in step S104. , 1-2 are prohibited. As a result, the turbo chillers 1-1 and 1-2 are not started / stopped unnecessarily immediately before the peak cut time period TA.

[Example 3]
Next, as another example (example 3) of the processing operation of the CPU 13A according to the above-described operation control program, a case where the operation prohibition number N of the centrifugal chiller 1 in the peak cut time zone TA is set to N = 1 will be described. . In this example 3, the time width of the replacement preparation time zone TB is determined as TW1 × N = 25 minutes × 1 vehicle = 25 minutes, and the time zone of “12:35 to 13:00” is set as the replacement preparation time zone TB. Set.

[When there are two operating centrifugal chillers]
In Example 3, it is assumed that the turbo chillers 1-1 and 1-2 are operated as a state immediately before entering the replacement preparation time zone TB. In this case, when the current time becomes the start time of the replacement preparation time zone TB according to the operation control program (YES in step S101, point t1 shown in FIG. 9), the CPU 13A determines whether the operation prohibited number N is set. Check (step S102). In this example, since the operation prohibition number N is set as N = 1 (YES in step S102), the process proceeds to step S103.

  In step S103, it is checked whether there is a turbo chiller 1 that is currently stopped. If there is a turbo chiller 1 that is currently stopped, the process proceeds to step S104. If there is no turbo chiller 1 that is currently stopped, step S108 is performed. Proceed to In this example, since the turbo chillers 1-1 and 1-2 are both in operation, the process proceeds to step S108.

  In step S <b> 108, the CPU 13 </ b> A starts one absorption refrigeration machine 2 having a high start order that is stopped according to the operation order table TC. In this case, the absorption chiller 2-1 is started up as the absorption refrigeration machine 2 in a stopped state having a high startup order. In addition, simultaneously with the start-up of the absorption chiller 2-1, one turbo chiller 1 in operation is stopped (step S109). In this case, since the turbo chillers 1-1 and 1-2 are both in operation, one of the turbo chillers 1-1 and 1-2, for example, the turbo chiller 1-2 having a low starting order is stopped. .

  Then, after the rise time TW1 (25 minutes) of the activated absorption chiller 2-1 has elapsed (YES in step S110, point t2 shown in FIG. 9), the number and operation of the turbo chillers 1 that are prohibited from being activated. The sum of the number of turbo chillers 1 that has been stopped is compared with the operation prohibited number N (step S111).

  In this case, the number of turbo chillers 1 whose start is prohibited is 0, the number of turbo chillers 1 whose operation has been stopped is 1, and the sum thereof is equal to the number N of operations prohibited (N = 1). Therefore (YES in step S111), the process ends.

[When there is one operating centrifugal chiller]
In Example 3, it is assumed that only the centrifugal chiller 1-1 is being operated as a state immediately before entering the replacement preparation time zone TB. In this case, when the current time becomes the start time of the replacement preparation time zone TB according to the operation control program (YES in step S101, (point t1 shown in FIG. 10)), the CPU 13A determines whether the operation prohibited number N is set. In this example, since the operation prohibited number N is set as N = 1 (YES in step S102), the process proceeds to step S103.

  In step S103, it is checked whether there is a turbo chiller 1 that is currently stopped. If there is a turbo chiller 1 that is currently stopped, the process proceeds to step S104. If there is no turbo chiller 1 that is currently stopped, step S108 is performed. Proceed to In this example, since the turbo chiller 1-2 is stopped, the process proceeds to step S104.

  In step S <b> 104, the CPU 13 </ b> A prohibits activation of all the stopped turbo chillers 1 that are equal to or less than the operation prohibited number N. In this case, startup of the stopped centrifugal chiller 1-2 is prohibited. That is, the stopped turbo chiller 1-2 is set as a start-up prohibition heat source.

  Then, a difference between the operation prohibited number N and the number of turbo chillers 1 whose start is prohibited (number of start prohibited heat sources) is obtained, and it is checked whether or not the difference is> 0 (step S105). In this example, since the operation prohibition number N is one and the number of turbo chillers 1 whose start is prohibited is one, the difference is zero. In this case, since “operation prohibited number−starting prohibited heat source number” is ≦ 0 (NO in step S105), the process ends.

[When there are no operating centrifugal chillers]
In Example 3, it is assumed that none of the turbo chillers 1-1 and 1-2 is operated as a state immediately before entering the replacement preparation time zone TB. In this case, in step S104, activation of either one of the centrifugal chillers 1-1 and 1-2, for example, the turbo chiller 1-2 having a low activation order, is prohibited. As a result, the turbo chiller 1-2 is not started / stopped uselessly just before the peak cut time period TA.

  In the above-described embodiment, the predetermined replacement preparation time zone TB is called from the storage device 13C and is set. However, the operation prohibited number N of the centrifugal chillers 1 in the peak cut time zone TA, the absorption type The replacement preparation time zone TB may be automatically calculated and set from the rise time TW1 of the refrigerator 2 and the start time ts of the peak cut time zone TA.

  In the above-described embodiment, the rising time TW1 of the absorption refrigeration machine 2 is defined as the time shift when the turbo chiller 1 in operation in the replacement preparation time zone TB is shifted to stop one by one. However, it is somewhat shorter than the rise time TW1 of the absorption chiller 2, such as slightly shorter than the rise time TW1 of the absorption chiller 2, or slightly longer than the rise time TW1 of the absorption chiller 2. Differences in time width are acceptable.

  Further, for example, in the central monitoring device (not shown), the secondary load in the peak cut time zone TA and the amount of power in the power demand contract are compared from the trend graph of the previous day load, and the turbo chiller 1 in the peak cut time zone TA is compared. The operation prohibition number N may be obtained, and the obtained operation prohibition number N may be set in the heat source control device 13. In this case, the replacement preparation time zone TB may be obtained by automatic calculation each time.

  In the above-described embodiment, the first type heat source is a turbo chiller and the second type heat source is an absorption chiller. However, the first type heat source and the second type heat source are turbo chillers, It is not limited to absorption refrigerators. Moreover, although the example which uses a refrigerator as a heat source demonstrated, when using a heater, it can apply similarly. Moreover, although the case where it aims at suppression of electric power consumption as energy was demonstrated, it can apply similarly when it aims at suppression of gas consumption. In this case, in the heat source system shown in FIG. 1, the absorption chiller 2 is a first type heat source, and the turbo chiller 1 is a second type heat source.

  As a reference, FIG. 11 shows a functional block diagram of a main part of the heat source control device 13 in the above-described embodiment. The heat source control device 13 includes heat source replacement means 14. The heat source replacement means 14 reads the replacement preparation time zone TB from the storage device 13C and sets the replacement preparation time zone setting means 14A that is set immediately before the peak cut time zone TA, and the number of operation prohibited at the start time of the replacement preparation time zone TB. Turbo chiller start prohibiting means 14B for prohibiting the start of all the stopped turbo chillers 1 as a heat source start prohibiting heat source, and a predetermined wait according to the number of start prohibiting heat sources from the start time of the replacement preparation time zone TB After a lapse of time, the number of the operation-prohibited heat sources is subtracted from the number of operation-prohibited heat sources N and the turbo chillers 1 that are in operation are shifted in time, and then stopped. A turbo chiller operation stop / absorption chiller starting means 14C for starting the absorption chiller 2 is provided. This heat source replacement means 14 is realized as a processing function of the CPU 13A.

It is an instrumentation figure which shows the principal part of one Embodiment of the heat-source system using the heat-source control apparatus which concerns on this invention. It is a figure which shows the outline of the hardware constitutions of the heat source control apparatus in this heat source system. It is a figure explaining the replacement preparation time zone set just before the peak cut time zone in this heat source system. It is a figure which illustrates the driving | operation order table used in this heat source system. It is a figure which shows the setting condition of the driving | running prohibition with respect to the turbo refrigerator in the rise time and peak cut time slot | zone of a turbo refrigerator and an absorption refrigerator. It is a flowchart for demonstrating the processing operation according to the operation control program which CPU of a heat source control apparatus performs. It is a time chart for demonstrating an example (example 1) of the processing operation according to an operation control program. It is a time chart for explaining other examples (example 2) of processing operation according to a driving control program. It is a time chart for explaining the 1st example of another example (example 3) of processing operation according to a driving control program. It is a time chart for explaining the 2nd example of another example (example 3) of processing operation according to a driving control program. It is a functional block diagram which shows the function of the principal part of a heat source control apparatus. It is a time chart for demonstrating replacement | exchange of the heat source in the conventional peak cut time slot | zone.

Explanation of symbols

  1 (1-1, 1-2) ... turbo refrigerator (first type heat source), 2 (2-1, 2-2, 2-3) ... absorption refrigerator (second type heat source), P1 P5 ... Pump, 3 ... Out header, 4 ... Outbound pipe line, 5 ... External device, 6 ... Flow control valve, 7 ... Return water line, 8 ... Return header, 9 ... Bypass line, 10 ... Water supply temperature sensor, DESCRIPTION OF SYMBOLS 11 ... Return water temperature sensor, 12 ... Flow meter, 13 ... Heat source control apparatus, 13A ... CPU, 13B ... RAM, 13C ... Memory | storage device, 13D, 13E ... Interface, 14 ... Heat source replacement means, 14A ... Replacement preparation time setting means , 14B: turbo chiller start prohibiting means, 14C: turbo chiller operation stop / absorption chiller start means.

Claims (4)

In the peak cut time zone in which energy consumption is suppressed, the operation of a part or all of the first type heat source is prohibited, and the first type heat source is used instead of the first type heat source for which the operation is prohibited. In the heat source control device that operates the second type heat source with low energy consumption,
Before entering the peak cut time zone, among the first type heat sources during operation, the plurality of first type heat sources whose operation is prohibited in the peak cut time zone are sequentially shifted and stopped. Heat source replacement means for starting the second type heat source being stopped instead of the stopped first type heat source;
The heat source replacement means includes
Means for setting a replacement preparation time zone in which the time width is determined in accordance with the number of operation-prohibited units determined as the number of first type heat sources whose operation is prohibited in the peak cut time zone immediately before the peak cut time zone When,
Means for prohibiting activation of the first type of heat source that is not more than the number of operation prohibited at the start time of the replacement preparation time zone as the activation prohibited heat source;
After the elapse of a predetermined waiting time corresponding to the number of start-up prohibition heat sources from the start time of the replacement preparation time zone, the first type of the first type in operation of the number obtained by subtracting the number of start-up prohibition heat sources from the operation prohibition number And a means for starting the second type heat source that is stopped in place of the stopped first type heat source, and sequentially stopping the heat source at different times.
The heat source control device, wherein a time shift width when sequentially stopping a plurality of the first type heat sources in operation is equal to a rise time of the second type heat sources. In the heat source control device according to claim 1,
The time width of the replacement preparation time zone is equal to a time width equal to a time obtained by multiplying the rising time of the second type heat source by the number of prohibited operations,
The time width of the predetermined waiting time is equal to a time width equal to a time obtained by multiplying the rising time of the second type heat source by the number of start-up prohibition heat sources . In the peak cut time zone in which energy consumption is suppressed, the operation of a part or all of the first type heat source is prohibited, and the first type heat source is used instead of the first type heat source for which the operation is prohibited. In the heat source control method for operating the second type heat source with low energy consumption,
Before entering the peak cut time zone, among the first type heat sources during operation, the plurality of first type heat sources whose operation is prohibited in the peak cut time zone are sequentially shifted and stopped. A heat source replacement step of activating the stopped second type heat source instead of the stopped first type heat source;
The heat source replacement step includes:
A step of setting a replacement preparation time zone in which a time width is determined immediately before the peak cut time zone, in accordance with the number of operation-banned units determined as the number of first type heat sources whose operation is prohibited in the peak cut time zone When,
Prohibiting the start-up as the start-up prohibition heat source with the first type of heat source being stopped at the start time of the replacement preparation time zone equal to or less than the number of operation-prohibited units;
After the elapse of a predetermined waiting time corresponding to the number of start-up prohibition heat sources from the start time of the replacement preparation time zone, the first type of the first type in operation of the number obtained by subtracting the number of start-up prohibition heat sources from the operation prohibition number And sequentially stopping the heat source by shifting the time of the heat source, and starting the second type heat source being stopped instead of the stopped first type heat source,
The time shift when the plurality of first type heat sources in operation are sequentially stopped is set to a time width equal to the rise time of the second type heat source.
The heat source control method characterized by the above-mentioned. In the heat source control method according to claim 3,
The time width of the replacement preparation time zone is equal to a time width equal to a time obtained by multiplying the rising time of the second type heat source by the number of prohibited operations,
The time width of the predetermined waiting time is set to a time width equal to a time obtained by multiplying the rising time of the second type heat source by the number of start-up prohibition heat sources .

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