JPH09159247A - Heat source controlling method and heat source control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce operation cost and unify accumulated operation time for each of heat source devices. SOLUTION: An accumulated operation time of each of cold water devices (a heat source device) is calculated (a step 102). A running cost of each of cold water devices is calculated (a step 103). It is checked whether or not there is a cold water device in which a difference Δt in respect to a maximum accumulated operating time exceeds a predetermined time T (Δt>T) and if the cold water device with Δt>T is present, a priority order is applied in sequence of running cost to the cold water device with Δt>Tf (a step 105). Then, it is checked whether or not the cold water device with Δt<=T (a step 106) and a priority order is applied in a next sequence in an order of an operation cost (a step 107). A control over the number of operation of the cold water devices is performed in accordance with the applied priority order.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the number of operating heat source units used in an air conditioning system or the like.

[0002]

2. Description of the Related Art Conventionally, in an air conditioning system, a plurality of hot and cold water generators are provided as heat source units, and the number of operating these heat source units is controlled. For example, the temperature difference between the outgoing water supplied to the load equipment and the return water passing through the load equipment is measured, and the flow rate of the incoming water or the return water is measured, and then the flow rate is compared with the temperature difference between the outgoing water and the return water. Is multiplied by to calculate the heat consumption of the load equipment, and the number of operating chiller-heaters is determined according to the heat consumption.

FIG. 5 is an instrumentation diagram showing an example of a conventional air conditioning system. In this air conditioning system, pumps 1 ₁ ...
1 _n and a plurality of cold / hot water machines 2 ₁ to 2 _n such as a gas absorption cold / hot water machine, a turbo refrigerator, a boiler, etc. are provided respectively, and outgoing water pressure-fed by the pumps 1 ₁ to 1 _n is cold / hot water. Machine 2 ₁
Supplied from line 4 through the header 3 through to 2 _n, via the load device 5 such as a fan coil unit, reaches to the header 7 as Kaemizu via line 6, is pumped again by the pump 1 ₁ to 1 _n, The above routes are circulated. Also, header 3
A bypass line 8 and a bypass valve 9 are provided between the header 7 and the header 7, and the differential pressure between the header 3 and the header 7 is measured by a differential pressure gauge 11, and the control device 12 is operated according to the measured value. 'Provides an opening command to the bypass valve 9 to control the feed pressure of the incoming water.

Further, the control device 12 'measures the temperature T ₁ of the outgoing water by the thermometer 13 provided near the header 3 side of the pipeline 4, and at the same time, the pipeline 6 of the header 7 and the pumps 1 ₁ to 1 _n. The temperature T ₂ of the return water is measured by the thermometer 14 provided in the middle of the side pipe.
And the flow rate Q of the return water flowing through the pipeline 6 of the header 7.
Is measured by the flowmeter 10, and the temperature T ₁ of the outgoing water and the temperature T of the return water are measured.
The temperature difference from ₂ is multiplied by the flow rate Q of the return water to obtain the heat consumption of the load device 5. Then, the control device 12 ′ controls the number of operating the water cooling / heating machines 2 ₁ to 2 _n in accordance with a predetermined operating order according to the calculated heat consumption amount of the load device 5. In FIG. 5, 15 is a cooling tower, 1 _{n + 1}
Is a pump for the cooling tower 15.

[0005]

However, according to such a conventional method for controlling the number of operating hot / cold water heaters, the operating cost varies depending on conditions such as the type of hot / cold water heater, rating, and operating time. operation order with respect chiller 2 ₁ to 2 _n are gone predetermined. In other words, operating costs are different due to differences between the gas absorption chiller / heater and the turbo chiller, the size of the rating even for the same type of chiller, the difference between manufacturers, and the difference in product variations even for the same model number of the same manufacturer. Despite being different, the hot and cold water machines 2 ₁ to 2
_The driving order has already been determined for _n . Therefore, the chiller-heater which is optimal in terms of cost is not always operated, and the operation cost may be increased.

Further, from the viewpoint of maintenance against the consumption of each chiller / heater, it is desired that the cumulative operating time of the chiller / heaters 2 ₁ to 2 _n is equal. However, since the number of operating control method of a conventional chiller is operated ranking they've predetermined integrated operating time of the chiller 2 ₁ to 2 _n is not equal.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a heat source machine control method and a heat source machine control apparatus which can reduce the operating cost. is there. Another object of the present invention is to provide a heat source device control method and a heat source device control device capable of reducing the operating cost and equalizing the cumulative operating time of each heat source device.

[0008]

In order to achieve such an object, the first invention (the invention according to claim 1) obtains the operating cost of each heat source machine, and the heat source machines are arranged in ascending order of the operating cost. Is given a priority order, and the number of operating heat source machines is controlled according to the given priority order. According to the present invention, the number of operating heat source units is controlled in ascending order of operating cost.

The second invention (the invention according to claim 2) obtains an integrated operating time of each heat source device, gives an operating time ranking to the heat source device based on the obtained integrated operating time, and operates each heat source device. The cost is calculated, the operation cost rank is given to the heat source machine based on the calculated operation cost, the final priority order is given to each heat source machine based on the given operation cost order and the operation time order, and this is given. The number of operating heat source machines is controlled according to the final priority order. According to the present invention, the final priority order is determined by combining the integrated operation time and the operation cost, and the number of operating heat source devices is controlled in accordance with the determined final priority order.

A third invention (an invention according to claim 3) obtains an integrated operating time and an operating cost of each heat source device, and whether or not there is a heat source device whose difference Δt from the maximum integrated operating time exceeds a predetermined value T. If there is a heat source machine whose difference Δt from the maximum integrated operating time exceeds a predetermined value T, the heat source machines whose difference Δt from the maximum integrated operating time exceeds a predetermined value T are given priority in ascending order of operating cost. After giving, the difference from the maximum integrated operating time Δ
If the heat source units with t equal to or less than the predetermined value T are given priority from the next order in the ascending order of operating cost, and if there is no heat source unit whose difference Δt from the maximum integrated operating time exceeds the predetermined value T, the operating cost of each heat source unit The priority order is assigned in ascending order, and the number of operating heat source machines is controlled in accordance with the assigned priority order. According to the present invention, if there is a heat source machine whose difference Δt from the maximum integrated operating time exceeds a predetermined value T (Δt> T),
First, priorities are given to the heat source machines with Δt> T in ascending order of operating cost. Then, after that, Δt ≦ T
Priority is given to the heat source machines in the order of increasing operation cost from the next order.

A fourth invention (an invention according to claim 4) is an operation history data collecting means for collecting operation history data of each heat source machine, and each heat source machine from the operation history data collected by the operation history data collecting means. Operating cost calculating means for calculating the operating cost of the heat source, priority assigning means for assigning priority to each heat source device in the order of increasing operating cost based on the operating cost calculated by the operating cost calculating means, and this priority assigning means The operating number control means for controlling the number of operating heat source units according to the priority given by the above. According to the present invention, the operating cost of each heat source device is calculated from the collected operation history data, and the operating number of heat source devices is controlled in ascending order of operating cost.

A fifth aspect of the invention (the invention according to claim 5) is the operation history data collecting means for collecting operation history data of each heat source machine, and each heat source machine from the operation history data collected by the operation history data collecting means. Operating time calculation means for calculating the integrated operation time of the heat source, operation cost calculation means for calculating the operation cost of each heat source device from the operation history data collected by the operation history data collection means, and integration calculated by the operation time calculation means An operating time rank giving means for giving the operating time rank of the heat source equipment based on the operating time, and an operating cost rank giving means for giving the operating cost rank of the heat source equipment based on the operating cost calculated by the operating cost calculating means, Based on the driving time rank given by the driving time rank giving means and the driving cost rank given by the driving cost rank giving means And a final priority order giving means for giving a final priority order to each heat source machine, and an operating number control means for controlling the number of operating heat source machines according to the final priority order given by the final priority order giving means. Is. According to the present invention, the integrated operating time and the operating cost of each heat source device are calculated from the collected operation history data, and the final priority order is determined by combining the calculated integrated operating time and the operating cost. The number of operating heat source machines is controlled according to the final priority order.

A sixth invention (an invention according to claim 6) is an operation history data collecting means for collecting operation history data of each heat source machine, and each heat source machine from the operation history data collected by the operation history data collecting means. The difference Δt between the maximum operating time and the operating time calculating means for calculating the cumulative operating time of the heat source, the operating cost calculating means for calculating the operating cost of each heat source device from the operating history data collected by the operating history data collecting means, Checking means for checking whether or not there is a heat source device that exceeds a predetermined value T, and if it is determined by this checking means that the difference Δt between the maximum integrated operating time exceeds the predetermined value T, there is a maximum integration value. Difference from operating time Δt
After assigning a priority order to the heat source machines having a predetermined value T or lower, the priority order is given to the heat source machines whose maximum integrated operation time difference Δt is the predetermined value T or lower from the next order. When the checking means determines that there is no heat source machine whose difference Δt from the maximum integrated operation time exceeds the predetermined value T, priority order giving means for giving priority order to each heat source machine in ascending order of operation cost; And an operating unit number control unit for controlling the operating number of heat source units according to the priority given by the order giving unit. According to the present invention, the integrated operating time and the operating cost of each heat source device are calculated from the collected operation history data. In this case, if there is a heat source machine whose difference Δt from the maximum integrated operation time exceeds a predetermined value T (Δt> T), first, a priority order is given to the heat source machine of that Δt> T in ascending order of operating cost. It Then, after that, the heat source machines with Δt ≦ T are given priority in the order of increasing operation cost from the next order.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail based on embodiments. FIG. 2 is an instrumentation diagram showing an example of an air conditioning system to which the present invention is applied. In the figure, the same reference numerals as those in FIG. In this embodiment, the hot and cold water machines 2 ₁ to 2
The controller 16 ₁ ~ 16 _n to _n, also annexed to the controller 16 _{n + 1} to the cooling tower 15, various data relating to the operating conditions in chiller 2 ₁ to 2 _n and the cooling tower 15 (electric energy, gas volume, Data such as the amount of water supplied and the amount of heat produced is sent to the control device 12.

[0015] Figure 3 is chiller 2 ₁ to 2 in the control unit 12
It is a functional block diagram which shows the operating number control situation with respect to _n . In block 12-1, the controller 12 multiplies the temperature difference between the temperature T ₁ of the outgoing water and the temperature T ₂ of the returning water by the flow rate Q of the returning water to obtain the heat consumption of the load device 5.

Further, the control device 12 has a block 12-2.
In, the operating costs of the chiller / heaters 2 ₁ to 2 _n are calculated. That is, by dividing the fuel price used for producing the heat quantity by the produced heat quantity, the hot and cold water generators 2 ₁ to 2 _n
Calculate the running cost of. To calculate this running cost, various data relating to the driving situation from the controllers 16 _{1 to} 16 _{n + 1} are used as driving history data.

For example, in the case of an absorption chiller-heater, its running cost is calculated by the following equation (1). [(Gas consumption x gas consumption rate) + {(Chiller / heater power amount + primary chilled water pump power amount + cooling tower power amount + cooling water pump power amount) x power unit price} + (cooling tower water supply amount x water supply unit price) ) + (Cooling tower blow water amount x sewage unit price)] / chilled water heater cold water production calorie value ···· (1)

In the case of a turbo refrigerator, its running cost is calculated by the following equation (2) during nighttime operation, by the following equation (3) during daytime operation, and by the following equation (4) for all day operation. To do. [{(Turbo-chiller electric power + Primary chilled water pump + Cooling tower electric power + Cooling water pump electric power) x Nighttime electric power unit price} + (Cooling tower water supply amount x Water supply unit price) + (Cooling tower blow water amount x Sewer unit price)] / Integrated value of nighttime cold water production of turbo chiller ··· (2) [{(turbo chiller power + primary chilled water pump + cooling tower power + cooling water pump power) x daytime power unit price} + (cooling tower (Supply water amount × Unit price of clean water) + (Unit amount of blow water for cooling tower × Unit price of sewage)] / Integrated value of turbo chiller daytime cold water production capacity (3) (Numerator of formula (2) + Molecule of formula (3)) / Integrated value of chilled water production of turbo chiller ··· (4)

Further, the control device 12 has a block 12-3.
In, the cumulative operating time of the hot and cold water machines 2 ₁ to 2 _n is calculated. That is, for each chiller 2 ₁ to 2 _n, integrating the operating time.

Then, the control device 12 has a block 12-
In 4, the priority order (final priority order) of the cooling / heating machines 2 ₁ to 2 _n is determined based on the running cost calculated in block 12-2 and the integrated operating time calculated in block 12-3. Then, in block 12-5, the water heater / cooler 2 ₁ according to the priority order determined in block 12-4 according to the heat consumption amount of the load device 5 obtained in block 12-1.
Control the number of operating units up to 2 _n .

FIG. 1 shows a controller 12 for hot and cold water machines 2 ₁ to 2
₉ is a flowchart showing a situation of determining a priority order for _n . The controller 12, when a predetermined calculation time (step 101), calculates the integrated operating time of the chiller 2 ₁ to 2 _n (step 102). In addition, cold water heater 2
The running cost of _{1 to} 2 _n is calculated (step 10
3). In this step 103, the running cost is calculated by taking the moving average for one week. As a result, the running cost obtained in step 103 is an average value including weekdays, half days, and holidays.

Then, the control device 12 determines whether or not there is a chiller / heater whose difference Δt from the maximum integrated operation time exceeds a predetermined time T (Δt> T), that is, the chiller / heater having the longest integrated operation time. On the other hand, it is checked whether or not there is a chiller-heater whose difference Δt in the cumulative operating time exceeds a predetermined time T (step 104).

If there is a cooling / heating machine with Δt> T, Δt>
Priorities (final priorities) are given to the cooling and heating machines of T in ascending order of running cost (step 105). Then, it is checked whether or not there is a cooling / heating machine with Δt ≦ T (step 106), and if there is a cooling / heating machine with Δt ≦ T, the Δ
A priority order (final priority order) is given to the cooling and heating machines of t ≦ T in the ascending order of operation cost from the next order (step 107).

In step 104, if there is no cooling / heating machine of Δt> T, the cooling / heating machine of Δt ≦ T is given a priority order (final priority order) in ascending order of running cost (step 108).

The situation in which the control device 12 determines the priority order will be specifically described. For example, now, the hot and cold water machines 2 ₁ to 2
It is assumed that _n is 4. And the hot and cold water machines 2 ₁ to 2
_{On the} other hand, it is assumed that, in Steps 102 and 103, the cumulative operating time and running cost are obtained as a result as shown in FIG. In this case, the control device 1
2 is the hot and cold water machine with the longest cumulative operating time.
₄ and the difference Δ between the cumulative operating time of the chiller / heater 2 ₄ (maximum cumulative operating time) and the cumulative operating time of the chiller / heater 2 ₁ to 2 ₃
Obtain t1 to Δt3. In this case, Δt1 is “450
H ”and Δt2 are“ 50H ”, and Δt3 is“ 100 ”H.

The control device 12 then determines the difference Δ found.
By comparing t1 to Δt3 with the predetermined time T, the chiller-heater with Δt> T is set as the “first place” operating time rank. Also, Δt ≦ T
For the chiller-heater, the running cost is given in ascending order of the running cost. In this case, if the predetermined time T is, for example, “200H”, the chiller / heater 2 ₁ becomes the operating time rank “first place”, and the chiller / heater 2 ₂ , 2 ₃ , 2 ₄
Are the running cost rankings "1st" and "2nd" respectively
It will be "3rd place".

Then, the control device 12 sets the operating time rank "1" for the water heater having the operating time rank "1st".
If there are multiple "top and bottom" water heaters, the final priority is given to the one with the lowest running cost. In this case, the hot and cold water machine 2 ₁
Since only is the operation time order "# 1", hot and cold water machine 2 ₁
Is the final priority "1st".

Then, the control device 12 gives the final priority order from the next order to the chiller / heater having the running cost order in ascending order of the running cost order. In this case, since the hot and cold water machines 2 ₂ , 2 ₃ and 2 ₄ are running cost ranks “1st”, “2nd” and “3rd” respectively, the final priority is given from the next order of the hot and cold water machines 2 _1. Then, the hot and cold water machines 2 ₂ , 2 ₃ and 2 ₄ are given the final priority "2.
"3rd place" and "4th place".

By adopting such a priority assigning method, that is, by determining the final priority by combining the integrated operating time and the running cost, the integrated operation of the chiller / heaters 2 ₁ to 2 _n is performed. It becomes possible to reduce the operating cost while equalizing the time.

In this embodiment, the final priority order is determined by combining the integrated operating time and the running cost, but the final priority order may be determined only by the running cost. That is, in the example shown in FIG. 4, the running cost ranks of the cooling / heating machines 2 ₁ to 2 ₄ may be set to 1st to 4th ranks, and this running cost rank may be used as it is as the final priority rank.

Further, in this embodiment, it obtains the heat consumption of the load device 5, chiller 2 ₁ in accordance with the heat consumption
Although the case of controlling the number of operating units of 2 _n has been described, tomorrow's load is predicted from the load of the previous day using the ARIM model etc., and the operating number of the chiller / heater attached to the heat storage tank is controlled according to this predicted load. The same can be applied to the case. In this case, the final priority order is determined by combining the cumulative operating time of each chiller / heater and the running cost before starting the nighttime operation. The predicted hot water load and cold water load, the determined number of operating hot and cold water machines, etc. are displayed in the guidance and used as information for the operator.

[0032]

As is apparent from the above description, according to the present invention, in the first invention and the fourth invention, the number of operating heat source units is controlled in the order of lower operating cost, and the operating cost is reduced. You will be able to. Further, in the second invention and the fifth invention, the final priority order is determined by combining the integrated operating time and the operating cost, and the number of operating heat source machines is controlled in accordance with the final priority order thus determined. It is possible to reduce the operating cost while achieving equalization of the cumulative operating time. Further, in the third invention and the sixth invention, the difference Δt from the maximum integrated operation time exceeds the predetermined value T (Δt> T).
If there is a heat source unit, first, a priority order is given to the heat source unit with Δt> T in the ascending order of operating cost, and thereafter, a priority order is given to the heat source unit with Δt ≦ T in ascending order of operating cost from the next order. Is added, and the number of operating heat source devices is controlled according to the assigned priority, and the operating cost can be reduced while equalizing the integrated operating time of the heat source devices.

[Brief description of the drawings]

FIG. 1 is a flowchart showing a situation in which a priority order (final priority order) for each chiller-heater is determined by a controller.

FIG. 2 is an instrumentation diagram showing an example of an air conditioning system to which the present invention is applied.

FIG. 3 is a functional block diagram showing a control state of the number of operating units for each water heater / cooler in the controller.

FIG. 4 is a diagram showing a specific example for explaining a priority determination situation in the control device.

FIG. 5 is an instrumentation diagram showing an example of a conventional air conditioning system.

[Explanation of symbols]

₁ 1 ~1 _{n +} 1 ... pump, 2 ₁ ~2 _n ... chiller, 3,7
... header, 4, 6 ... pipeline, ... 5 ... load equipment, 8 ... bypass pipeline, 9 ... bypass valve, 10 ... flow meter, 11 ... differential pressure gauge, 12 ... control device, 13, 14 ... thermometer, 15 …cooling tower.

Claims (6)

[Claims] 1. A method for controlling the number of operating heat source units, comprising a plurality of heat source units, wherein the operating cost of each heat source unit is obtained, and the heat source units are given priority in ascending order of operating cost. Then, the heat source machine control method is characterized in that the number of operating heat source machines is controlled in accordance with the given priority order. 2. A method for controlling the number of operating heat source units, comprising a plurality of heat source units, wherein an integrated operating time of each of the heat source units is obtained, and the heat source units are operated based on the obtained integrated operating time. A time rank is given, the operating cost of each heat source machine is obtained, the operating cost order is given to the heat source machine based on the obtained operating cost, and the operation cost order and the operating time order are given based on the given operating cost order. A heat source machine control method, wherein a final priority order is given to each heat source machine, and the number of operating heat source machines is controlled in accordance with the given final priority order. 3. A method for controlling the number of operating heat source units, comprising a plurality of heat source units, wherein an integrated operating time and an operating cost of each of the heat source units are obtained, and a difference Δt from the maximum integrated operating time is a predetermined value. It is checked whether or not there is a heat source unit that exceeds T, and if there is a heat source unit whose difference Δt with the maximum integrated operating time exceeds a predetermined value T, the difference Δt with the maximum integrated operating time is the predetermined value T.
After assigning priorities to heat source machines that exceed the maximum operating cost, the priority is given to the heat source machines whose difference Δt from the maximum integrated operating time is less than or equal to a predetermined value T from the next order in ascending order of operating cost. If there is no heat source device whose difference Δt from the operating time exceeds the predetermined value T, priority is given to each of the heat source devices in ascending order of operating cost, and the number of operating heat source devices is controlled according to the given priority. A heat source machine control method characterized by the above. 4. A heat source machine control device comprising a plurality of heat source machines and controlling the number of operating heat source machines, an operation history data collecting means for collecting operation history data of each heat source machine, and the operation history data. Operation cost calculation means for calculating the operation cost of each heat source device from the operation history data collected by the collection means, and based on the operation cost calculated by this operation cost calculation means, the heat source devices are arranged in ascending order of the operation cost. A heat source machine control device comprising: priority order giving means for giving a priority order; and operating number control means for controlling the operating number of the heat source machines according to the priority order given by the priority order giving means. . 5. A heat source machine control device comprising a plurality of heat source machines and controlling the number of operating heat source machines, an operation history data collecting means for collecting operation history data of each heat source machine, and the operation history data. An operating time calculating means for calculating an integrated operating time of each heat source machine from the operating history data collected by the collecting means, and an operating cost of each heat source machine from the operating history data collected by the operating history data collecting means. Operating cost calculating means, an operating time rank assigning means for assigning an operating time rank to the heat source unit based on the integrated operating time calculated by the operating time calculating means, and an operating cost calculated by the operating cost calculating means Based on the operating cost rank giving means for giving the operating cost rank to the heat source device, by the operating time rank giving means Final priority assigning means for assigning a final priority to each of the heat source machines based on the assigned operating time ranking and the operating cost ranking assigned by the operating cost ranking assigning means, and the final priority assigning means A heat source device control device for controlling the number of operating heat source devices according to the final priority order. 6. A heat source machine control device comprising a plurality of heat source machines and controlling the number of operating heat source machines, an operation history data collecting means for collecting operation history data of each heat source machine, and the operation history data. An operating time calculating means for calculating an integrated operating time of each heat source machine from the operating history data collected by the collecting means, and an operating cost of each heat source machine from the operating history data collected by the operating history data collecting means. And a check means for checking whether or not there is a heat source device whose difference Δt between the maximum integrated operating time exceeds the predetermined value T, and the difference Δt between the maximum integrated operating time and this check means.
If it is determined that there is a heat source unit that exceeds a predetermined value T, the maximum integrated operating time is given to the heat source units whose difference Δt from the maximum integrated operating time exceeds the predetermined value T in order of increasing operating cost. To the heat source machines whose difference Δt from the predetermined value T is less than the predetermined value T, the priorities are given from the next order in the ascending order of operation cost, and it is judged by the checking means that there is no heat source machine whose difference Δt in the cumulative operating time exceeds the predetermined value T In this case, priority assigning means for assigning priority to each of the heat source machines in ascending order of operating cost, and operating number control means for controlling the number of operating heat source machines according to the priority assigned by the priority assigning means. And a heat source machine control device.