JP4955378B2 - Air conditioner operation control apparatus and method - Google Patents

Description

  The present invention relates to an air conditioner operation control apparatus and method for controlling an air conditioner so that the amount of energy supplied to the air conditioner that operates by receiving heat supply from the heat supply facility does not exceed a target capacity.

Conventionally, in buildings where energy is supplied from a district heating and cooling (DHC) system using a heat medium such as cold water, steam, or hot water, heat is supplied so that the energy supply does not exceed the target capacity. Demand control is performed (for example, refer to Patent Document 1). In the control system disclosed in Patent Document 1, the total load fluctuation of the demand side air conditioning equipment is predicted, and when this predicted value exceeds the step increase set value, the air conditioning target set value of the demand side air conditioning equipment is heated within the comfort zone. By automatically updating in the direction of reducing the load, the increase in the heat load was regulated to improve the thermal efficiency of the air conditioning equipment and save energy.
Further, as means for suppressing the heat load of the air conditioning equipment, for example, Patent Document 2 discloses means for relaxing the set value (in the case of cooling, the cooling set temperature of the air conditioning equipment is raised, and in the case of heating, the heating set temperature is lowered). , Means for suppressing the valve opening, means for suppressing the intake amount of outside air, and the like are described.

JP 2003-139372 A JP-A-9-243140

  As in the technique described in Patent Document 2, in the method of selecting the suppression unit that should execute the thermal load suppression from the plurality of suppression units according to the level of the load heat amount of the air conditioning equipment, for example, the level of the load heat amount Accordingly, if the temperature set value is relaxed, the outside air intake amount is suppressed, and the opening of the reception control valve is sequentially controlled, the temperature of the room subject to air conditioning control and the temperature set value When the deviation is very large, there is a problem that even if the temperature set value is relaxed, the valve opening has already reached the upper limit, and the energy saving effect cannot be obtained. That is, it can be said that the relaxation of the temperature set value is not always an effective means for suppressing the thermal load. If the relaxation of the temperature set value is not an effective means for thermal load suppression, invalid parameter operation will continue, and in the worst case, the load heat quantity may exceed the target capacity. Thus, in the conventional technique, since the suppression means fixed according to the level of the load heat amount is executed, there is a possibility of performing an invalid suppression operation.

  The present invention has been made to solve the above-described problem, and can control the suppression of the energy supply amount to the air conditioning equipment by judging the effectiveness of the thermal load suppression by each of the plurality of suppression means. An object of the present invention is to provide an air conditioning equipment operation control apparatus and method.

The present invention provides an air conditioning facility operation for controlling the air conditioning facility so that an energy supply amount to an air conditioning facility that operates by receiving heat supply from the heat supply facility does not exceed a target capacity indicating a maximum energy supply amount that can be supplied. A control device that measures the amount of energy supplied from the heat supply facility to the air-conditioning facility; and according to the energy supply amount so that the measured energy supply amount does not exceed the target capacity The suppression rate calculation means for calculating the suppression rate, a plurality of suppression means for suppressing the thermal load of the air conditioning equipment according to the suppression rate, and the effectiveness of the thermal load suppression by each of the plurality of suppression means are preset. The effectiveness determination means for determining based on the determined determination criteria, and the suppression means determined to be effective by the effectiveness determination means from the plurality of suppression means, and the selected suppression And an inhibition rate output means for executing the heat load suppression in accordance with the inhibition rate in stages, prior Symbol validity determination unit, the priority of selection of said plurality of suppressing means which is set in advance according to the building condition Accordingly, the effectiveness of the thermal load suppression of the suppression means is determined in descending order of priority.
The energy supply amount is a load heat amount of the air conditioning facility or a flow rate of a heat medium supplied from the heat supply facility to the air conditioning facility.

The air conditioning facility operation control method of the present invention includes a measurement procedure for measuring an energy supply amount from the heat supply facility to the air conditioning facility, and the measured energy supply amount so as not to exceed the target capacity. The suppression rate calculation procedure for calculating the suppression rate according to the energy supply amount, and the effectiveness of thermal load suppression by each of the plurality of suppression means for suppressing the thermal load of the air conditioning equipment, based on preset judgment criteria, respectively The effectiveness determination procedure to be determined and the suppression means determined to be effective in the effectiveness determination procedure are selected from the plurality of suppression means, and the selected suppression means is subjected to thermal load suppression according to the suppression rate. a suppression procedure rate output to be executed, repeatedly executes the validity determination procedure, according to the priorities of selection of said plurality of suppressing means which is set in advance according to the building condition, is high priority It is characterized in that comprises the steps of determining the validity of the thermal load suppression of the suppression means in order.

  According to the present invention, the effectiveness determination means for determining the effectiveness of the thermal load suppression by each of the plurality of suppression means based on the preset criteria, and the effectiveness determination means from among the plurality of suppression means. By selecting the suppression means determined to be effective and providing the selected suppression means with a suppression rate output means for executing thermal load suppression according to the suppression rate, selecting an effective means for thermal load suppression Since it is possible to eliminate unnecessary suppression operations due to selection of invalid suppression means, the energy supply amount can be prevented from exceeding the target capacity, and the contracted capacity can be observed, It can contribute to energy saving.

  Further, in the present invention, in accordance with the priority order of selection of a plurality of suppression means set in advance, by determining the effectiveness of the thermal load suppression of the suppression means in descending order of priority, for example, the influence on the air conditioning environment is taken into consideration. It becomes possible to select the suppression means.

  Relaxing the temperature setting value to control the heat load of the air conditioning equipment will manage the final temperature indication value, so the impact on the environment can be anticipated, but the temperature of the room will be the temperature setting value. In the control logic for following the above, the temperature set value is not a parameter that directly handles the energy supply amount to the air conditioning equipment. That is, the temperature setting value is an instruction value for the environment, not an instruction value for energy. This is the cause of the problem that the amount of energy supply exceeds the target capacity.

  Therefore, when priority is given to the suppression of the heat load over the comfort of the air conditioning, the parameter capable of directly operating the energy supply amount should be changed or another suppression means should be selected. Considering the structure of the control logic, the opening of the receiving control valve and the air conditioner control valve is a parameter that directly indicates energy, so it is determined that the relaxation of the temperature setting value is not effective for thermal load suppression. In this case, it is effective to suppress the opening of the valve, and if another suppression means can be selected, the effectiveness of the suppression means is judged and implemented.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing a configuration of an air conditioning facility according to an embodiment of the present invention.
In FIG. 1, 1 is a heat exchanger that receives a heat medium such as cold water, steam, and hot water from a DHC system (heat supply equipment) (not shown), 2 is a reception control valve that controls the amount of heat medium received, and 3 is a heat exchanger. 1 is a sensor for measuring the temperature (or flow rate) of cold water or hot water on the secondary side of 1, 4 is a controller for controlling the reception control valve 2, 5 is an air conditioner, 6 is an outside air damper for controlling the introduction amount of outside air OA, 7 Is a return air damper that controls the amount of return air RA introduced, 8 is a coil that cools or heats air with cold or hot water sent from the heat exchanger 1, 9 is a fan that sends air cooled or heated by the coil 8, 10 is an air conditioner control valve for controlling the flow rate of cold water or hot water sent from the heat exchanger 1, 11 is a room to be air-conditioned, 12 is a temperature sensor for measuring the temperature of the room 11, and 13 is CO ₂ of the room 11. Measure concentration O ₂ concentration sensor, 14 a controller for controlling the damper 6, 7 and the air conditioner control valve 10, 15 is a central monitoring system for monitoring the overall air conditioning facilities, 16 measures the temperature of the heating medium supplied from the DHC system temperature Sensor, 17 is a flow sensor that measures the flow rate of the heat medium, 18 is a temperature sensor that measures the temperature of the heat medium that returns to the DHC system, 19 is an exhaust damper that controls the amount of exhaust EA, 20 is a humidifier, and 21 is a humidifier. A humidifying valve 22 for controlling the flow rate of cold water or hot water sent to the vessel 20 is a humidity sensor for measuring the humidity of the living room 11. The controllers 4 and 14 and the central monitoring device 15 constitute an air conditioning equipment operation control device that controls the air conditioning equipment.

  Next, the operation of the air conditioning equipment of FIG. 1 will be described. First, a heat medium such as cold water, steam, or hot water is supplied from the DHC system (not shown) to the primary side of the heat exchanger 1. The heat exchanger 1 cools or heats the water on the secondary side with this heat medium. Here, the sensor 3 measures the temperature (or flow rate) of cold water or hot water on the secondary side sent out from the heat exchanger 1. And the controller 4 feedback-controls the opening degree of the reception control valve 2 so that the temperature (or flow rate) of cold water or hot water becomes a predetermined cold / hot water temperature setting value (or cold / hot water flow rate setting value).

  Cold water or hot water sent out from the heat exchanger 1 is supplied to the coil 8 of the air conditioner 5 through the air conditioner control valve 10. The coil 8 cools or heats the outside air OA and the return air RA with this cold water or hot water. Cold water or hot water used in the coil 8 is returned to the heat exchanger 1. Further, the cold water or the hot water sent out from the heat exchanger 1 is supplied to the humidifier 20 through the humidification valve 21. The humidifier 20 controls the humidity of the supply air SA cooled or heated by the coil 8 by creating a water spray state. The supply air SA cooled or heated by the coil 8 and humidified by the humidifier 20 is sent out to the living room 11 by the fan 9. Part of the air in the living room 11 is returned to the air conditioner 5 as return air RA.

Temperature sensor 12 measures the temperature of the room 11, the CO ₂ concentration sensor 13, the CO ₂ concentration in the room 11 is measured, the humidity sensor 22 measures the humidity of the room 11. Then, the controller 14, the temperature and CO ₂ concentration in the room 11 is such that each becomes a predetermined set value, feedback control of the opening degree of the opening and the outside air damper 6 of the air conditioner control valve 10. Moreover, the controller 14 feedback-controls the opening degree of the humidification valve 21 so that the humidity of the living room 11 becomes a predetermined humidity set value.

Next, the thermal demand control of this Embodiment applied to the air conditioning equipment of FIG. 1 is demonstrated. FIG. 2 is a flowchart showing the flow of the thermal demand control process of the present embodiment, and FIG. 3 is a block diagram showing a configuration example of the central monitoring device 15.
The central monitoring device 15 includes a load heat quantity measuring unit 150, a smoothing processing unit 151, a suppression rate calculating unit 152, an effectiveness determining unit 153, and a suppression rate output unit 154.

The central monitoring device 15 performs the processing of FIG. 2 at regular operation intervals. First, the load heat quantity measuring means 150 of the central monitoring device 15 measures the instantaneous value of the load heat quantity of the air conditioning equipment of FIG. 1 (step S1 in FIG. 2). The temperature Tr of the heat medium supplied from the DHC system is measured by the temperature sensor 16, and the flow rate F of the heat medium is measured by the flow rate sensor 17. Further, the temperature Ts of the heat medium returning to the DHC system is measured by the temperature sensor 18. These measurement data are sent to the central monitoring device 15 through the controller 4. The load heat quantity measuring means 150 calculates an instantaneous value Q of the load heat quantity from the temperature data and flow rate data of the heat medium as shown in the following equation.
Q = F × (Tr−Ts) × λ (1)
In the formula (1), λ is a specific heat.

  Subsequently, the smoothing processing unit 151 smoothes the instantaneous value Q of the load heat amount measured by the load heat amount measuring unit 150 (step S2). Since the instantaneous value Q of the load heat amount varies greatly, the instantaneous value is smoothed before the subsequent processing. As the smoothing processing, there are arithmetic processing using a first-order lag filter and moving average arithmetic processing. In the calculation process by the first-order lag filter, the smooth value of the load heat amount is calculated by the previous value and the current value of the load heat amount and a preset smoothing coefficient. In the moving average calculation process, the moving average value of the load heat quantity for the past n minutes (for example, n = 1 to 10) is calculated as a smooth value.

  Next, the suppression rate calculation means 152 determines whether or not the load heat amount that has been smoothed is equal to or less than a target capacity (contract capacity) that indicates the maximum load heat amount that can be used in the air conditioning equipment (step S3). In the following processing, since the load heat amount that has been smoothed is used, the load heat amount that has been smoothed is simply referred to as load heat amount. When the load heat quantity is equal to or less than the target capacity (determination YES in step S3), the suppression rate calculation means 152 determines whether the load heat quantity is equal to or greater than a preset suppression start capacity (suppression start heat quantity) (step S4). The suppression start capacity is set to a value lower than the target capacity. For example, the suppression start capacity is set to about 80% to 90% of the target capacity.

  When the load heat amount is lower than the suppression start capacity (determination NO in step S4), the suppression rate calculation means 152 determines whether the load heat amount is larger than a value obtained by subtracting a predetermined differential from the suppression start capacity (step S5). ). The differential is a set value for determining the width of the dead zone in the floating control, and is set with, for example, about 5% to 10% of the suppression start capacity. When the load heat amount is equal to or less than the value obtained by subtracting the differential from the suppression start capacity (determination NO in step S5), the suppression rate calculation unit 152 determines whether the previously output suppression rate is 0% (step S6). Here, since the suppression rate remains 0%, the determination is YES in step S6, and the process proceeds to the validity determination process in step S14. This validity determination process will be described later.

  Next, when the load heat amount becomes equal to or greater than the suppression start capacity in step S4, the suppression rate calculation unit 152 increments the operation interval count by 1 (step S7). The initial value of the operation interval count is zero. After counting up the operation interval count, the suppression rate calculation means 152 determines whether or not the operation interval count value has reached a certain value (step S8). If the operation interval count value has not reached a certain value (determination NO in step S8), the previously output suppression rate is continuously output, and the process proceeds to the effectiveness determination process in step S14. However, if the previous suppression rate is 0%, the determination is YES in step S8 regardless of the operation interval count value, and the process proceeds to step S9.

  When the state where the load heat amount is equal to or greater than the suppression start capacity continues, the operation interval count value is counted up one after another by repeating the processing of FIG. The suppression rate calculation means 152 resets the operation interval count value to 0 (step S9) when the operation interval count value reaches a certain value or when the previous suppression rate is 0% (determination YES in step S8). A suppression rate corresponding to the amount of heat of load is calculated and output (step S10), and the process proceeds to the effectiveness determination process of step S14.

Here, a method for calculating the suppression rate will be described. The suppression rate calculation means 152 calculates the step width (upper limit value to be output at a time) when outputting the suppression rate according to the following formula using the preset maximum suppression rate and the number of setbacks.
Step width = maximum suppression rate / setback frequency (2)
The number of setbacks in equation (2) is the number of times to determine how many times the suppression rate is output. For example, if the temperature set value is relaxed by 2 ° C. at the maximum, the setting of how many times the 2 ° C. is relaxed becomes the setback frequency. When the number of setbacks is set to 2 times, the temperature is relaxed by 2 ° C. by 2 times at 1 ° C.

  Then, the suppression rate calculation unit 152 sets a value that is an integer multiple of the step width as the suppression rate according to the current output count of the suppression rate. For example, when the maximum suppression rate is 100% and the number of setbacks is 4, that is, when the step width is 25%, the suppression rate at the first suppression rate output timing (timing at which the operation interval count value becomes a constant value) is The step width is 25% × 1 time = 25%, and the suppression rate at the second suppression rate output timing is step width 25% × 2 times = 50%, and the suppression rate at the third suppression rate output timing is step. The width 25% × 3 times = 75%, and the suppression rate at the fourth suppression rate output timing is step width 25% × 4 times = 100%. In this way, every time the operation interval count value becomes a constant value, the suppression rate according to the step width is output stepwise.

  However, in calculating the suppression rate, it is necessary to determine the current suppression rate with reference to the current output suppression rate. For example, when the current suppression rate is 0%, the first suppression rate is immediately output regardless of the operation interval count value as described above. If the current suppression rate is not 0%, a value that is an integral multiple of the step width is set to exceed the current suppression rate. For example, when the current suppression rate is 43%, when the load heat amount exceeds the suppression start capacity and the suppression rate output timing comes, the current suppression rate is set to 50%. In this case, since the third suppression rate is output, the fourth suppression rate 75% is output at the next suppression rate output timing.

When the load heat amount is equal to or greater than the suppression start capacity, the suppression rate is output every time the operation interval count value becomes a constant value. Moreover, when load calorie | heat amount increases, the suppression rate also increases according to this. Therefore, the suppression rate increases stepwise as the load heat amount increases. The reason why the suppression rate is output stepwise is to prevent excessive load suppression.
The reason for waiting for the calculation of the suppression rate until the operation interval count value reaches a certain value is to wait until the effect of suppressing the thermal load by the suppression rate output immediately before is obtained. By providing an effect waiting time that is an integral multiple of the operation interval, stable thermal load suppression control can be realized.

  On the other hand, when the load heat amount exceeds the target capacity (determination NO in step S3), the suppression rate calculation means 152 outputs a predetermined maximum suppression rate regardless of the operation interval count value (step S11), and the effectiveness of step S14 Proceed to the sex determination process. By performing the maximum thermal load suppression that can be performed at once according to the maximum suppression rate, the thermal load can be rapidly suppressed and reduced below the target capacity.

  When the load suppression control described later is performed by the output of the suppression rate in step S10 or S11, the load heat amount decreases and becomes lower than the suppression start capacity. When the load heat amount is lower than the suppression start capacity and larger than the value obtained by subtracting the differential from the suppression start capacity (determination YES in step S5), the suppression rate calculation means 152 continues the suppression rate output immediately before. Are output (step S12), and the process proceeds to the validity determination process of step S14.

  Next, when the load heat amount becomes equal to or less than the value obtained by subtracting the differential from the suppression start capacity due to a further decrease in the load heat amount (determination NO in step S5), the suppression rate calculation means 152 has a previously output suppression rate of 0. It is determined whether it is% (step S6). Here, since the suppression rate is being output, the determination is NO in step S6, and the process proceeds to step S13.

  When the load heat amount is equal to or less than the value obtained by subtracting the differential from the suppression start capacity and the previously output suppression rate is not 0%, the suppression rate calculating means 152 calculates a value obtained by subtracting a predetermined change rate from the previously output suppression rate. The current suppression rate is calculated (step S13), and the process proceeds to the effectiveness determination process in step S14. Therefore, when the state where the load heat amount is equal to or less than the value obtained by subtracting the differential from the suppression start capacity continues, the suppression rate gradually approaches 0% at a predetermined change rate by repeating Step S13.

Next, the effectiveness determination process in step S14 by the effectiveness determination unit 153 and the suppression rate output unit 154 will be described. FIG. 4 is a flowchart for explaining the validity determination process.
In the present embodiment, as suppression means for suppressing the heat load of the air conditioning equipment, means for suppressing the amount of outside air taken in by the outside air damper 6 and the controller 14 that is the control mechanism, and a controller that is a management mechanism for the temperature setting value of the living room 11 14, the means for relaxing the temperature set value, the means for suppressing the opening of the acceptance control valve 2 by the acceptance control valve 2 and the controller 4 which is the control mechanism, the air conditioning by the air conditioner control valve 10 and the controller 14 which is the control mechanism. A means for suppressing the opening degree of the machine control valve 10 is assumed.

  In the effectiveness determination means 153, a criterion for determining the effectiveness of thermal load suppression is set in advance for each of these suppression means, and the priority of selection of the suppression means is set in advance. In the present embodiment, it is assumed that the priority is in the order of suppression of the amount of outside air intake, relaxation of the temperature set value, suppression of the opening degree of the reception control valve 2, and suppression of the opening degree of the air conditioner control valve 10. Here, taking into account the impact on the air conditioning environment, the priority for reducing the amount of outside air intake and the relaxation of temperature setpoints, which are likely to have an impact on the air conditioning environment, are increased, and the energy supply to the air conditioning equipment is more directly controlled. The priority of the opening degree suppression of the valves 2 and 10 to be operated is lowered. In addition, the priority of each suppression means may differ from this Embodiment. Even with the same combination of suppression means, the priority of the suppression means differs depending on the building situation.

  The effectiveness determination unit 153 determines the effectiveness of the thermal load suppression by the suppression unit in descending order of priority, and when it is determined to be effective, the effectiveness determination unit 153 selects the suppression unit to perform the thermal load suppression and determines that it is invalid In this case, the effectiveness of the thermal load suppression of the suppression means having the next highest priority is determined.

  That is, when the suppression rate is output from the suppression rate calculation unit 152, the effectiveness determination unit 153 receives this suppression rate and first determines the effectiveness of thermal load suppression by the unit that suppresses the outside air intake amount ( FIG. 4 step S15). A threshold value (for example, 100%) of the opening degree of the outside air damper 6 is set as a criterion for determining the effectiveness of the means for suppressing the outside air intake amount. If the current opening degree of the outside air damper 6 is 100%, the effectiveness judging means 153 judges that the means for suppressing the intake amount of outside air is effective as the means for executing the heat load suppression.

When the effectiveness determination unit 153 determines that the suppression of the outside air intake amount is effective (determination YES in step S15), the suppression rate output unit 154 instructs the controller 14 to suppress the outside air intake amount and suppresses the suppression rate. The suppression rate received from the computing means 152 is output (step S16).
The controller 14 suppresses the opening degree of the outside air damper 6 according to the suppression rate output from the suppression rate output means 154. That is, the smaller opening of the suppression opening calculated by the suppression opening setting table corresponding to the suppression rate and the opening calculated by feedback control is set as the current opening.

  Further, when the current opening degree of the outside air damper 6 is not 100%, the effectiveness judging means 153 judges that the suppression of the outside air intake amount is invalid (determination NO in step S15), and the heat by the means for relaxing the temperature set value. The effectiveness of load suppression is determined (step S17). As a criterion for determining the effectiveness of the means for relaxing the temperature set value, an allowable deviation between the temperature set value and the temperature of the room 11 that is the target of air conditioning control is set.

The effectiveness determining means 153 determines the effectiveness of the means for relaxing the temperature set value according to the equation (3) during cooling.
PV ≦ SP + ΔT (3)
Moreover, the effectiveness determination means 153 determines the effectiveness of the means for relaxing the temperature set value according to the equation (4) during heating.
PV ≧ SP−ΔT (4)

  In Formula (3) and Formula (4), SP is a temperature set value, PV is the temperature of the room 11, and ΔT is an allowable deviation. Effectiveness determination means 153 is effective as a means for performing thermal load suppression when the temperature PV is equal to or lower than the sum of temperature setting value SP and allowable deviation ΔT during cooling. When the temperature PV is equal to or greater than the difference obtained by subtracting the allowable deviation ΔT from the temperature set value SP during heating, it is determined that the means for relaxing the temperature set value is effective as a means for performing thermal load suppression. To do.

The suppression rate output means 154 instructs the controller 14 to relax the temperature set value when the effectiveness determining means 153 determines that the relaxation of the temperature set value is effective (determination YES in step S17), and also suppresses the suppression rate. The suppression rate received from the computing means 152 is output (step S18).
The controller 14 relaxes the temperature setting value of the room 11 according to the suppression rate output from the suppression rate output means 154. That is, in the case of cooling, the temperature set value is increased by the set rate of suppression of the maximum set value relaxation range, and in the case of heating, the temperature set value is decreased by the rate of suppression of the maximum set value relaxation range. ,

  Effectiveness determination means 153 determines that the relaxation of the temperature set value is invalid when the absolute value of the deviation between temperature set value SP and temperature PV of room 11 exceeds threshold value TH (determination NO in step S17). ), The effectiveness of thermal load suppression by means for suppressing the opening degree of the acceptance control valve 2 is determined (step S19). As a criterion for determining the effectiveness of the means for suppressing the opening degree of the acceptance control valve 2, a threshold value (for example, 100%) of the opening degree of the acceptance control valve 2 is set. If the current opening degree of the reception control valve 2 is 100%, the effectiveness determination means 153 determines that the means for suppressing the opening degree of the reception control valve 2 is effective as a means for performing thermal load suppression. To do.

The suppression rate output means 154 suppresses the opening degree of the reception control valve 2 to the controller 4 when the validity determination means 153 determines that the suppression of the opening degree of the reception control valve 2 is effective (determination YES in step S19). And the suppression rate is output (step S20).
The controller 4 suppresses the opening degree of the reception control valve 2 according to the suppression rate output from the suppression rate output means 154.

Effectiveness determination means 153 determines that the suppression of the opening degree of acceptance control valve 2 is invalid when the current opening degree of acceptance control valve 2 is not 100% (determination NO in step S19). The suppression rate output unit 154 instructs the controller 14 to suppress the opening degree of the air conditioner control valve 10 when the effectiveness determination unit 153 determines that the suppression of the opening degree of the reception control valve 2 is invalid. The suppression rate is output (step S21).
The controller 14 suppresses the opening degree of the air conditioner control valve 10 according to the suppression rate output from the suppression rate output means 154.

In this way, the heat load is suppressed. FIG. 5 is a waveform diagram showing an operation example of the thermal demand control of the present embodiment, and shows one example of changes in the load heat amount and the suppression rate. 50 in FIG. 5 is a value obtained by subtracting the differential from the suppression start capacity.
When the load heat amount increases and the load heat amount becomes equal to or greater than the suppression start capacity at time t1 in FIG. 5, the suppression rate increases step by step by a process of steps S7 to S10. The load heat quantity is reduced by the output of the suppression rate, and the load heat quantity is smaller than the suppression start capacity and larger than the value obtained by subtracting the differential from the suppression start capacity between times t2 and t3. Thus, the value of the suppression rate is held.

  Next, when the load heat amount becomes equal to or less than the value obtained by subtracting the differential from the suppression start capacity at time t3, the suppression rate is decreased at a predetermined change rate by the process of step S13. Since the heat amount rebound in which the load heat amount temporarily rises due to the decrease in the suppression rate, the load heat amount becomes larger than the value obtained by subtracting the differential from the suppression start capacity between the times t4 and t5. The value of the suppression rate is retained by the processing.

  When the load heat amount becomes equal to or less than the value obtained by subtracting the differential from the suppression start capacity at time t5, the suppression rate decreases again by the process of step S13. The operations at times t6 and t7 are the same as those at times t4 and t5, respectively. Thus, the load heat amount becomes equal to or less than the value obtained by subtracting the differential from the suppression start capacity at time t7, and the suppression rate decreased at time t7 returns to 0%. According to the example of FIG. 5, it can be seen that the amount of heat rebound when the suppression rate is lowered is small, and the return of the load heat amount is suppressed. In the example of FIG. 5, only the output of the suppression rate is described, but the effectiveness determination process when the suppression rate is output from the suppression rate calculation unit 152 is as described in FIG. 4.

  As described above, in this embodiment, since the heat load of the air conditioning equipment is suppressed when the load heat amount reaches the suppression start capacity, the load heat amount should not exceed the target capacity. it can. In addition, by outputting the suppression rate in stages, it is possible to prevent excessive load suppression and maintain comfortable air conditioning, and to achieve stable thermal load suppression control by providing a certain waiting time Can do.

  In the present embodiment, the effectiveness of the thermal load suppression by each of the plurality of suppression means is determined based on the preset criteria, respectively, and the suppression means determined to be effective is selected, and the selected suppression means By implementing the thermal load suppression according to the suppression rate, instead of selecting the suppression means only by the load heat amount level of the air conditioning equipment as in the past, effective means for thermal load suppression Since the selection is made, it is possible to prevent the useless suppression operation from continuing due to the selection of the invalid suppression means. As a result, in the present embodiment, it is possible to prevent the load heat amount from exceeding the target capacity, and it is possible to contribute to energy saving by complying with the contract capacity.

  Further, in the present embodiment, according to the priority order set in advance, by determining the effectiveness of the thermal load suppression of the suppression means in descending order of priority, the selection of the suppression means taking into account the influence on the air conditioning environment, for example, is selected. It becomes possible to do. For example, when the priority of the means for relaxing the temperature set value is set higher than that of the means for suppressing the opening degree of the valves 2 and 10, and the thermal load suppression by the relaxation of the temperature set value is effective, the instruction value for the environment is used. By relaxing a certain temperature setting value, it is possible to maintain a state in which the impact on the environment is easy to predict, and only when it is determined that the relaxation of the temperature setting value is not effective, the valve 2 can operate the energy supply more directly. By suppressing the opening degree of 10, it is possible to reliably prevent the load heat amount from exceeding the target capacity.

In the present embodiment, four suppression means are exemplified as suppression of the outside air intake amount, relaxation of the temperature set value, suppression of the opening degree of the reception control valve 2, and suppression of the opening degree of the air conditioner control valve 10. Although described, the present invention is not limited to this. Means for relaxing the CO ₂ concentration setting value of the living room 11 by the controller 14, means for relaxing the humidity setting value of the living room 11 by the controller 14, the humidifying valve 21 and the controller 14 The present invention can also be applied to other suppression means such as a means for prohibiting humidification and a means for relaxing the cold / hot water temperature set value by the controller 4.

In the present embodiment, a single air conditioner is described, but it goes without saying that the present invention can be similarly applied to a plurality of air conditioners. Further, in this embodiment, the explanation is given by taking as an example the suppression of heat demand for DHC consumers who receive heat supply from the DHC system. However, the present invention is not limited to this, and heat supply equipment is installed in the building. The present invention may be applied to a building having a self-heating source.
Further, the flow rate F of the heat medium may be used instead of the load heat quantity Q as the energy supply quantity to be measured. In this case, the target capacity is the target flow rate, and the suppression start capacity is the suppression start flow rate.

  In addition, the central monitoring device 15 and the controllers 4 and 14 of the present embodiment can be realized by a computer having a CPU, a storage device, and an external interface, and a program for controlling these hardware resources. In such a computer, the program for realizing the thermal demand control of the present invention is provided in a state of being recorded on a recording medium such as a flexible disk, a CD-ROM, a DVD-ROM, or a memory card. The CPU writes the program read from the recording medium into the storage device, and executes the above-described processing according to the program.

  The present invention can be applied to a technique for controlling air conditioning equipment.

It is a block diagram which shows the structure of the air conditioning equipment which concerns on embodiment of this invention. It is a flowchart which shows the flow of a process of the heat demand control of embodiment of this invention. It is a block diagram which shows the structural example of the central monitoring apparatus in the air conditioning equipment of FIG. It is a flowchart explaining the effectiveness determination process by the effectiveness determination means and the suppression rate output means of the central monitoring apparatus of FIG. It is a wave form diagram which shows the operation example of the heat demand control of embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Heat exchanger, 2 ... Acceptance control valve, 3 ... Sensor, 4 ... Controller, 5 ... Air conditioner, 6 ... Outside air damper, 7 ... Return air damper, 8 ... Coil, 9 ... Fan, 10 ... Air conditioner control valve , 11 ... room, 12 ... temperature sensor, 13 ... CO ₂ concentration sensor, 14 ... controller, 15 ... building management system, 16, 18 ... temperature sensor, 17 ... flow sensor 19 ... exhaust damper, 20 ... humidifier, 21 DESCRIPTION OF SYMBOLS ... Humidification valve, 22 ... Humidity sensor, 150 ... Load calorie measurement means, 151 ... Smoothing processing means, 152 ... Inhibition rate calculation means, 153 ... Effectiveness judgment means, 154 ... Inhibition rate output means.

Claims (3)

It is an air conditioner operation control device that controls the air conditioner so that the energy supply amount to the air conditioner that operates by receiving heat supply from the heat supply facility does not exceed the target capacity indicating the maximum energy supply amount that can be supplied. And
Measuring means for measuring the amount of energy supplied from the heat supply equipment to the air conditioning equipment;
A suppression rate calculating means for calculating a suppression rate according to the energy supply amount so that the measured energy supply amount does not exceed the target capacity;
A plurality of suppression means for suppressing the thermal load of the air conditioning equipment according to the suppression rate;
Effectiveness determination means for determining the effectiveness of thermal load suppression by each of the plurality of suppression means based on preset judgment criteria,
A suppression rate output unit that selects a suppression unit that is determined to be effective by the effectiveness determination unit from the plurality of suppression units, and causes the selected suppression unit to perform thermal load suppression according to the suppression rate. ,
The effectiveness determination means determines the effectiveness of thermal load suppression of the suppression means in descending order of priority according to a priority order of selection of the plurality of suppression means set in advance according to a building situation. Air conditioning equipment operation control device. In the air conditioning equipment operation control device according to claim 1 ,
The energy supply amount is a load heat amount of the air conditioning equipment or a flow rate of a heat medium supplied from the heat supply equipment to the air conditioning equipment. This is an air conditioner operation control method for controlling the air conditioner so that the energy supply amount to the air conditioner that operates by receiving heat supply from the heat supply facility does not exceed the target capacity indicating the maximum energy supply amount that can be supplied. And
A measurement procedure for measuring an energy supply amount from the heat supply facility to the air conditioning facility;
A suppression rate calculation procedure for calculating a suppression rate according to the energy supply amount so that the measured energy supply amount does not exceed the target capacity;
An effectiveness determination procedure for determining the effectiveness of thermal load suppression by each of the plurality of suppression means for suppressing the thermal load of the air conditioning equipment, based on a predetermined criterion, respectively;
A suppression rate output procedure for selecting a suppression unit determined to be effective in the effectiveness determination procedure from the plurality of suppression units, and causing the selected suppression unit to perform thermal load suppression according to the suppression rate. Run repeatedly ,
The effectiveness determination procedure includes a procedure of determining the effectiveness of thermal load suppression of the suppression means in descending order of priority according to the priority order of selection of the plurality of suppression means set in advance according to the state of the building. The air-conditioning equipment operation control method characterized by the above-mentioned.

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