JPH07269889A - Heat source controller - Google Patents

Abstract

PURPOSE:To prevent a heat storage tank from being increased/decreased in the case where heat storage capacity of the heat storage tank is small with respect to a load heat amount. CONSTITUTION:In a predicted number control part 3, a load heat amount is predicted and the number of heat source instruments 9 is determined based upon the predicted value of the load amount such that a heat storage tank 12 has a target heat storage amount. In a load number control part 4, the number of the heat source instruments 9 is determined based upon the heat storage amount and the load heat amount obtain in an operation storage/processing part 7. In an adjustment/processing part 5, when the heat storage amount is judged to be sufficient with respect to the load heat amount, a signal from the predicted number control part is outputted to the heat source instruments 9 while when it is judged to be insufficient, the signal from the predicted number control part 3 and a signal from the load number control part 4 are adjusted and are outputted to the heat source instruments 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat source control device for controlling the number of heat source devices in a heat source system having a plurality of heat source devices and a heat storage tank.

[0002]

2. Description of the Related Art A heat source system in a building or the like has a plurality of heat source devices and a heat storage tank, and the heat stored in the heat storage tank at night when the load is small is used during the daytime when the load is heavy to disperse the load. Is going.

In a heat source system having such a heat storage tank, heat storage target control at a target time is performed based on load prediction as automatic control of the number of heat source devices.

[0004]

However, it is often impossible to install a heat storage tank of a sufficient size in the heat source system due to restrictions such as the site area of the building, and the heat storage tank of such a sufficient size can be installed. In the heat source system in which cannot be set, when the target control is performed based on the load prediction, the heat storage amount may be less than 0% before the start request. On the other hand, there is a problem that the heat storage is completed (heat storage amount is 100%) before the target time by the start, and the restart operation is performed after the temporary stop.

The present invention has been made in consideration of such a point, and in controlling the number of heat source devices, even when the heat storage capacity of the heat storage tank is small with respect to the load, the heat storage amount is 0% during the control. Therefore, it is an object of the present invention to provide a heat source control device capable of preventing the heat supply from becoming impossible and preventing the temporary stop operation of the heat source due to completion of heat storage.

[0006]

The invention according to claim 1 is
In a heat source control device for controlling the number of operating heat source devices in a heat source system having a plurality of heat source devices and a heat storage tank, signals from the heat storage tank and the load side are input, and the heat storage amount and the load heat amount of the heat storage tank are obtained. Calculated by the calculation and storage processing unit, the predicted number of heat source devices that predicts the load heat amount, and determines the number of heat source devices so that the heat storage tank has the target heat storage amount at the target time based on the predicted load heat amount value. Based on the stored heat amount and the load heat amount, the load number control unit that determines the number of heat source devices and, when it is determined that the heat storage amount is sufficient for the load heat amount, the signal from the predicted number control unit is used. And an adjustment processing unit that adjusts the signal from the predicted number control unit and the signal from the load number control unit to output to the heat source device when it is determined to be insufficient. Heat source A control device.

According to a third aspect of the present invention, in a heat source control device for controlling the number of operating heat source devices in a heat source system having a plurality of heat source devices and a heat storage tank, signals from the heat storage tank and the load side are input, Predictive number of heat storage devices that calculates the heat storage amount and load heat amount of the heat storage tank and predicts the load heat amount and determines the number of heat source devices so that the heat storage tank has the target heat storage amount at the target time based on the load heat amount prediction value. Based on the signals from the control unit, the predicted number-of-units control unit, and the calculation and storage processing unit, the heat storage amount change monitoring unit that predicts changes in the heat storage amount of the heat storage tank, and the prediction based on the signals from the heat storage amount change monitoring unit. A heat source control device comprising: an adjustment processing unit that adjusts a signal from the unit number control unit and outputs the adjusted signal to the heat source device.

[0008]

According to the first aspect of the present invention, the predictive number controller controls the number of heat source devices so that the load heat amount is predicted and the heat storage tank has the target heat storage amount at the target time based on the load heat amount predicted value. The load number control unit determines the number of heat source devices based on the heat storage amount and the load heat amount obtained by the calculation and storage processing unit. In the adjustment processing unit, when it is determined that the heat storage amount is sufficient for the load heat amount,
The signal from the predicted number controller is output to the heat source device, and when it is determined that the signals are insufficient, the signal from the predicted number controller and the signal from the load number controller are adjusted and output to the heat source device.

According to the third aspect of the present invention, the predictive number controller controls the number of heat source devices so that the load heat amount is predicted and the heat storage tank has the target heat storage amount at the target time based on the load heat amount predicted value. The heat storage amount change monitoring unit predicts a change in the heat storage amount based on the signals from the predicted number of units control unit and the calculation and storage processing unit. The adjustment processing unit adjusts the signal from the predicted number-of-units control unit based on the signal from the heat storage amount change monitoring unit and outputs the adjusted signal to the heat source device.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment An embodiment of the present invention will be described below with reference to the drawings. 1 and 2 show a first heat source controller according to the present invention.
It is a figure which shows the Example of.

1 and 2, the heat source system has a plurality of heat source devices 9 and a heat storage tank 12 for storing a heat storage fluid, and a primary pump 10 is provided between the heat storage tank 12 and the heat source device 9.
Is provided. The heat storage fluid in the heat storage tank 12 is sent to the load side by the secondary pump 11.

The heat source control device 1 of the present invention controls the number of operating heat source devices 9, and signals from the heat storage tank and the load side are input through the input / output processing section 8 to the heat storage tank 12.
A calculation / storing processing unit 7 for obtaining the heat storage amount and the load heat amount of
It is provided with a database 6 in which actual values of past load heat amount and heat storage amount are accumulated.

The load heat quantity is predicted in the predictive number control unit 3 based on the past load heat quantity accumulated in the database 6, and the heat source is set so that the heat storage tank 12 has the target heat quantity at the target time based on the predicted load heat quantity. The number of devices is set. In addition, the number of heat source devices is determined by the load number control unit 4 based on the heat storage amount and the load heat amount obtained by the calculation and storage processing unit 7.

Further, the predicted number of vehicles control unit 3 and the number of loaded vehicles control unit 4 are connected to an adjustment processing unit 5 which adjusts signals from the predicted number of vehicles control unit 3 and the number of loaded vehicles control unit 4. Further, the signal from the adjustment processing section 5 is output to the heat source device 9 via the input / output processing section 8.

Next, the operation of this embodiment having such a configuration will be described. First, in the calculation storage processing unit 7, the heat storage amount and the load heat amount of the heat storage tank 12 are obtained based on the signals from the heat storage tank 12 and the load side. Next, the heat storage amount and the load heat amount obtained by the calculation and storage processing unit 7 are input to the control processing unit 2 including the load number control unit 4, the predicted number control unit 3, and the adjustment processing unit 5.

Next, in the predicted number-of-units control unit 3, the load heat amount is predicted by the past load heat amount accumulated in the database 6, and the heat storage tank 12 has the target heat storage amount at the target time based on this load heat amount predicted value. The number of heat source devices 9 is determined.

Similarly, in the load number control unit 4, the number of heat source devices 9 is determined on the basis of the heat storage amount and the load heat amount obtained by the calculation and storage processing unit 7.

Next, the signals from the predicted number of vehicles control unit 3 and the number of loaded vehicles control unit 4 are input to the adjustment processing unit 5, and in this adjustment processing unit 5, the signals of the forecasted number of vehicles control unit 3 and the number of loaded vehicles control unit 4 are sent. Adjustments are made.

That is, first, in the adjustment processing unit 5, as shown in FIG. 2, the load heat amount and the heat storage amount from the calculation and storage processing unit are compared, and there is a margin or shortage in the heat storage amount with respect to the load heat amount. Determine if there is.

As a result, when there is a margin (large) in the heat storage amount with respect to the load heat amount, the number of units is calculated based on the target heat storage amount control at the target time based on normal load prediction by the signal from the predicted number control unit 3. Take control. As a control example, the number of units is determined based on the amount of heat produced per unit time at the present time so that the target amount of heat storage is achieved at the target time.

On the other hand, when it is judged that the heat storage amount is insufficient (small) with respect to the load heat amount, in addition to the normal unit number control by the signal from the predicted number unit control unit 3, the signal from the load unit number control unit 4 is added. The number of units is controlled based on the current load heat quantity. In this case, the load number control unit 4 operates to operate the minimum number of heat sources necessary to cover the current load with the remaining heat storage amount and heat production, and minimizes the change in the heat storage amount. The predicted number control unit 3 performs a correction control for the remaining heat storage amount shortage / excess. In the specific example, the adjustment processing unit 5 outputs a command to increase the number of heat sources to the heat source device 9 in response to a request to increase the number of units by the predicted number control unit 3 or the load number control unit 4. Further, when both the number-of-units control units 3 and 4 request to reduce the number of units, the unit for outputting the number of units is output to the heat source device 9.

According to this embodiment, even when the heat storage capacity of the heat storage tank is small with respect to the load heat amount, the heat storage amount is increased / increased.
The decrease change can be minimized, and the heat storage amount can be prevented from becoming 0% or less or 100% or more. Second Embodiment Next, a second embodiment of the present invention will be described with reference to FIGS. 3 and 4. In the second embodiment, instead of the load number control unit, a heat storage amount change monitoring unit 13 that predicts a change in heat storage amount based on signals from the predicted number control unit 3 and the calculation and storage process 7 is provided. Others are substantially the same as those of the first embodiment shown in FIGS.

As shown in FIGS. 3 and 4, the control processing unit 2
Then, in the predicted number control unit 3, the heat storage tank 1 at the target time at 3
The number of units is controlled so that 2 has the target heat storage amount, and the number of heat source devices 9 is increased / the current state is maintained / the number is reduced. As an example of control, the number of units is determined based on the amount of production heat required per unit time at the present time so that the target amount of heat storage is achieved at the target time.

Next, based on the signal from the predicted number-of-units control unit 3, the heat storage amount change monitoring unit 13 predicts the change in the heat storage amount of the heat storage tank 12 at that time. The signals from the number-of-units control unit 3 and the heat storage amount change monitoring unit 13 are input to the adjustment processing unit 5, and the heat storage amount change monitoring unit 13 predicts that the heat storage amount exceeds 100% by the increase signal from the number-of-units control unit 3 In that case, the adjustment processing unit 5 outputs a command for requesting an increase in the number of units. In addition, when it is predicted that the heat storage amount is less than 0% due to the signal to reduce the number of units, the adjustment processing unit 5 outputs a command to request the number of units to be reduced. Further, when the current state is maintained in the standby state, the adjustment processing unit 5 outputs a decrease number command if the heat storage amount exceeds 100%, and outputs an increase command if the heat storage amount falls below 0%.

As described above, in the adjustment processing unit 5, even if the predicted number control unit 3 requests the increase / decrease of the number of units, if there is a suppression request from the heat storage amount change monitoring unit 13, the start / stop output is performed. Have. In this way, by adjusting the start / stop timing from the predicted number control unit 3 by the adjustment processing unit 5, it is possible to prevent the heat storage amount from becoming 0% or less or becoming 100% or more.

[0026]

As described above, according to the present invention,
Even if the heat storage capacity of the heat storage tank is small with respect to the load heat quantity,
It is possible to minimize the increase / decrease change in the heat storage amount. Therefore, it is possible to effectively prevent the heat storage amount from becoming 0% or less or 100% or more.

[Brief description of drawings]

FIG. 1 is a system configuration diagram showing a first embodiment of a heat source control device according to the present invention.

FIG. 2 is a detailed view of the inside of a control processing unit of the heat source control device shown in FIG.

FIG. 3 is a system configuration diagram showing a second embodiment of the heat source control device according to the present invention.

FIG. 4 is a detailed view of the inside of a control processing unit of the heat source control device shown in FIG.

[Explanation of symbols]

 1 Heat Source Control Device 3 Predicted Number Control Unit 4 Load Number Control Unit 5 Adjustment Processing Unit 6 Database 7 Calculation Storage Processing Unit 8 Input / Output Processing Unit 9 Heat Source Equipment 12 Heat Storage Tank 13 Heat Storage Change Monitoring Unit

Claims (4)

[Claims] 1. A heat source control device for controlling the number of operating heat source devices in a heat source system having a plurality of heat source devices and a heat storage tank, wherein signals from the heat storage tank and the load side are input to store heat in the heat storage tank. And a calculation / save processing unit that calculates the load heat amount, a prediction number control unit that predicts the load heat amount, and determines the number of heat source devices so that the heat storage tank has the target heat storage amount at the target time based on the load heat amount predicted value, Based on the heat storage amount and the load heat amount calculated by the storage processing unit, the load unit number control unit that determines the number of heat source devices and the predicted unit number control unit when it is determined that the heat storage amount is sufficient for the load heat amount. If the output signal is output to the heat source device and it is determined to be insufficient, an adjustment processing unit that adjusts the signal from the predicted number control unit and the signal from the load number control unit and outputs the signal to the heat source device is provided. Was it Heat control device according to claim. 2. When the adjustment processing unit determines that the heat storage amount is insufficient with respect to the load heat amount, and the number of units to be increased is requested by either the predicted number of units control unit or the number of loaded units control unit, the number of units is increased. The heat source control device according to claim 1, wherein the heat source control device outputs a command, and outputs the command to reduce the number of units when both the predicted number of units control unit and the number of loaded units control unit request the number of units to be reduced. 3. A heat source control device for controlling the number of operating heat source devices in a heat source system having a plurality of heat source devices and a heat storage tank, wherein signals from the heat storage tank and the load side are input to store heat in the heat storage tank. And a calculation and storage processing unit that calculates the load heat amount, a prediction number control unit that predicts the load heat amount, and determines the number of heat source devices so that the heat storage tank has the target heat storage amount at the target time based on the load heat amount prediction value, Based on the signals from the number-of-units control unit and the calculation / save processing unit, the heat-storage-amount change monitoring unit that predicts changes in the heat storage amount of the heat storage tank, and the predicted number-of-units control unit based on the signals from the heat storage amount change monitoring unit A heat source control device comprising: an adjustment processing unit that adjusts a signal and outputs the adjusted signal to a heat source device. 4. The adjustment processing unit waits for a request to increase the number of units if there is a request to increase the number of units from the predicted number of units control unit and the heat storage amount change monitoring unit predicts that the amount of heat storage will exceed 100% due to the increase in number of units. If there is a request to reduce the number of units from the predicted number control unit, and if the heat storage amount change monitoring unit predicts that the heat storage amount will fall below 0% due to the reduction of the number of units, adjustment is made so that the request to reduce the number of units is waited. The heat source control device according to claim 3.