JP2011085273A - Display device and cogeneration system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein in a conventional display device, informing a user about the operating state itself of a cogeneration system through information by light is taken into consideration but informing the user about the state of electric power consumption by the user in terms of energy saving during power generating operation of the cogeneration system is not considered. <P>SOLUTION: This display device includes a light display 103 displaying a state where electric power consumption of electric power load is larger than rated electric power generation amount of a cogeneration device 201 during power generating operation of a cogeneration system 200 in a first display pattern. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a display device that presents information regarding power consumption or energy saving performance to heat consumption to a user who is supplied with electric power and heat from a cogeneration device, and a cogeneration device including the display device.

  As a conventional display device for a combined heat and power device, a display device and a display light emitting diode are provided, and the control unit controls the color of characters to be output to the display and the issue color of the diode according to the power generation state. Has been proposed (see, for example, Patent Document 1). FIG. 6 is a schematic configuration diagram of a conventional display device for a combined heat and power device described in Patent Document 1.

  In FIG. 6, an FPD (Flat Panel Display) 601 is a thin display device such as a liquid crystal panel, and displays the operation state of the combined heat and power supply device with characters. The LED 602 expresses the operation state with the color of the light emitting diode.

  The input unit 603 acquires data related to the operation state of the combined heat and power supply apparatus (instantaneous power generation (Ws) linked to the system / independent).

  The control unit 604 sends a display signal to the FPD 601 according to the driving state acquired by the input unit 603, and displays information related to the driving state by the character string and the character color in the FPD. For example, if it is connected to the grid, it will be displayed in blue text as “Connected to the grid”, and if it is not linked to the grid, it will be displayed in red text as “Connected to the grid”. To do. The generated power is displayed in black characters. These displays are updated every 5 seconds.

  Furthermore, the control unit 604 also sends a control signal to the LED 602 so that the LED having the same color as the character color of the operating state displayed on the FPD is lit.

  While the display time in the FPD 601 is shortened, the shortage due to the shortening is compensated by turning on the LED 602, but the character color to be displayed and the lighting color are made the same to avoid confusion of the user.

JP 2006-65489 A

  However, in the above conventional display device, it is considered that the operation state of the cogeneration device itself is communicated to the user by light notification, but the power consumption of the user during the power generation operation of the cogeneration device is considered from the viewpoint of energy saving. Therefore, it is not considered to notify the user of the state of the situation.

  The present invention solves the above-described conventional problems, and includes a display device that notifies the user of the state of power consumption of the user during the power generation operation of the combined heat and power supply device from the viewpoint of energy saving, and the display device An object is to provide a combined heat and power device.

  In order to solve the above-described conventional problems, the display device according to the present invention has the first effect when the power consumption of the power load is larger than the rated power generation amount of the combined heat and power device during the power generation operation of the combined heat and power device. It has the optical indicator which displays with a display pattern, It is characterized by the above-mentioned.

  By comprising in this way, it becomes possible to alert | report to a user that it is an unpreferable state from an energy-saving viewpoint when a user's power consumption exceeds a rated power generation amount during the electric power generation operation of a cogeneration apparatus.

  According to the display device of the present invention, during the power generation operation of the combined heat and power supply device, it is possible to notify the user of what state the user's power consumption is in terms of energy saving.

1 is a schematic configuration diagram of a display device according to an embodiment of the present invention. Flowchart of optical display operation of display device according to embodiment of present invention The figure which determines the luminescent color of the display apparatus in embodiment of this invention The figure which determines the blink pattern of the light of the display apparatus in embodiment of this invention The figure which determines the other blink pattern of the light of the display apparatus in embodiment of this invention Schematic configuration diagram of a display device in a conventional cogeneration device

  Hereinafter, a display device according to an embodiment of the present invention and a combined heat and power supply device including the same will be described with reference to the drawings.

(Embodiment)
FIG. 1 is a schematic configuration diagram of a display device 100 and a combined heat and power supply device 200 including the display device 100 according to an embodiment of the present invention. As shown in FIG. 1, the display device 100 according to the present embodiment includes a predicted power consumption amount predicted by the predictor 207, a rated power generation amount (1000 W in this example) of the combined heat and power supply device 200, and a power consumption amount. Compared with the actual power consumption detected by the detector 206, it is detected by a power amount comparator 101 that determines the emission color of the light display 103 (LED in this example) and a heat storage amount detector 105. The amount of heat stored and the amount of heat consumed predicted by the predictor 201 are compared to determine the light blinking pattern, and the light color determined by the power amount comparator 101 and the amount of heat determined by the amount of comparator 102 are determined. And a light indicator 103 that displays light of a predetermined display pattern based on the blinking pattern of the light. The light display 103 may be any device as long as light display is possible. For example, an LED, a liquid crystal, or the like is used.

  Next, in addition to the display device 100, the combined heat and power supply apparatus 200 according to the embodiment of the present invention includes a combined heat and power supply 201 that generates electric power and heat, a regenerator 202 that recovers heat generated in the combined heat and power supply 201, and A power converter 203 that converts the electric power generated in the cogeneration unit 201 into electric power that can be supplied to the electric power load, a heat storage amount detector 205 that detects the heat storage amount of the heat accumulator 202, and a power consumption amount of the electric power load are detected. Predicted by the power consumption detector 206, the predictor 207 that predicts the power consumption of the power load and the heat consumption of the heat load based on the past data of the power consumption of the user of the combined heat and power device, and the predictor 207 And an operation planer 208 that plans the operation of the combined heat and power supply apparatus 200 based on the power consumption and the heat consumption.

  Next, an optical display operation of the display device 100 configured as described above will be described. FIG. 2 is a diagram illustrating a flow of an optical display operation of the display device 100. This flow is performed during the power generation operation of the combined heat and power supply apparatus 200. As shown in FIG. 2, the power consumption amount consumed by the power load is detected by the power consumption detector 206 during the power generation operation of the combined heat and power supply apparatus 200 (step S201). The power amount comparator 101 compares the power consumption amount acquired from the power consumption amount detector 206 with the rated power generation amount of the combined heat and power supply apparatus 200 and the power consumption amount predicted by the predictor 201, and the optical display 103. The color of the light to be displayed is determined (step S202). The “rated power generation amount” is defined as the maximum power generation amount of the combined heat and power supply apparatus 200, and is, for example, 1000W. Next, the heat storage amount stored in the heat storage device 202 is detected by the heat storage amount detector 205 (step S203). The heat quantity comparator 102 compares the heat storage quantity acquired from the heat storage quantity detector 205 with the heat quantity 1 and the heat quantity 2, and determines the blinking pattern of the optical display 103 (step S204). Here, the “heat amount 1” is a heat amount threshold value for determining that the heat storage amount in the heat accumulator 202 is approaching the predicted heat consumption value. For example, heat amount 1 = predicted heat consumption × 0.8 Defined. The “heat amount 2” is a heat amount threshold value for determining that the heat storage amount in the heat accumulator 202 is approaching the full heat storage amount, and is defined as, for example, heat amount 2 = full heat storage amount × 0.8. The Then, the light display 103 performs light display with a predetermined light display pattern based on the light display color determined by the power amount comparator 101 and the light blinking pattern determined by the heat amount comparator 104 (step S205). ).

  Next, the light display color determination operation performed by the power amount comparator 102 executed in step S202 will be described in detail.

  FIGS. 3A and 3B are diagrams illustrating an example of a rule for determining the display color of the optical display 103. As shown in FIG. 3A, when the predicted power consumption <the rated power generation amount, the power consumption detected by the power consumption detector 206 is: power consumption ≦ predicted power consumption, predicted power consumption If <power consumption amount ≦ rated power generation amount or rated power generation amount <power consumption amount is satisfied, the display colors of the optical display 103 are determined to be green, yellow, and red, respectively. In this example, the “first display pattern” is red, the “second display pattern” is green, and the “third display pattern” is yellow. Further, as shown in FIG. 3B, when the rated power generation amount <the predicted power consumption amount, the power consumption amount detected by the power consumption detector 106 is: power consumption ≦ rated power generation amount, rated power generation amount When <power consumption ≦ predicted power consumption or predicted power consumption <power consumption is satisfied, the display colors of the optical display 103 are determined to be green, yellow, and red, respectively. In this example, the “first display pattern” is yellow or red, and the “second display pattern” is yellow or green. In the example shown in FIGS. 3A and 3B, different status notifications in terms of energy saving are made using a plurality of display patterns from “first display pattern” to “third display pattern”. Although the form to perform is employ | adopted, it is not limited to this example, What is necessary is just to be comprised so that the optical display by the said "1st display pattern" may be performed at least.

  Here, the “green” indicates that the power consumption of the power load is lower than the planned power generation amount of the combined heat and power device, and the user's power consumption is in a state of high energy saving with respect to the power generation operation of the combined heat and power device. Indicates that there is. “Yellow” indicates that the user's power consumption tends to be energy-saving with respect to the power generation operation of the combined heat and power supply apparatus, but is larger than the planned power generation amount and there is room for improvement in terms of energy saving. Further, “red” indicates that the user's power consumption is in a very unfavorable state in terms of energy saving with respect to the power generation operation of the cogeneration apparatus.

  Thus, the user is informed of the state of his / her power consumption in terms of energy saving with respect to the power generation operation of the combined heat and power supply apparatus 200 due to the difference in display color of the light display 103. . In addition, the user can obtain guidance on what kind of power consumption behavior is preferable for improving energy saving performance by receiving such notification by the optical display 103. In the above description, the display pattern by the optical display 103 at the time of reporting the state of energy saving with respect to the power consumption of the user has been described based on FIGS. 3A and 3B, but is not limited to this example. Any display pattern may be used as long as the user can identify the difference in state in terms of energy saving. For example, as described below, a mode for notifying the user of the energy saving state with respect to the power consumption of the user may be adopted depending on the blinking pattern of the light of the light display 103 or the difference in the number of LEDs to be lit.

  For example, when “green” is displayed on the light display 103, the power consumption of the user is in a state of high energy saving with respect to the power generation operation of the combined heat and power supply device, so that the power consumption of the power load is not increased. Can be obtained. Further, when “yellow” is displayed on the light display 103, the user's power consumption is larger than the planned power generation amount. Therefore, a guideline for reducing the power consumption of the power load and improving the energy saving can be obtained. Further, when “red” is displayed on the light indicator 103, the user's power consumption is in a very unfavorable state in terms of energy saving, and thus a guideline for quickly reducing the power consumption of the power load can be obtained. .

  Next, the determination operation of the light blinking pattern by the heat quantity comparator 102 executed in step S204 will be described in detail.

  FIG. 4 shows the decision rule. As shown in FIG. 4, when the heat storage amount detected by the heat storage amount detector 205 satisfies the heat storage amount <heat amount 1, heat amount 1 ≦ heat storage amount <heat amount 2, or heat amount 2 <heat storage amount, Are displayed as “slow flashing”, “not flashing”, and “fast flashing”, respectively.

  Here, “slow flashing” means that the amount of stored heat is less than the predicted amount of heat consumed, and if this is the case, it is necessary to operate an auxiliary heater (for example, a gas water heater) to compensate for the amount of heat that is insufficient for the demand of the heat load. Therefore, the operation of the combined heat and power supply apparatus indicates that the energy saving performance is poor with respect to the heat consumption of the user. Further, “does not blink” indicates that the heat storage amount is sufficient for the heat consumption of the user. Further, “flashing quickly” indicates that the heat storage amount is approaching the full heat storage amount, and if it remains as it is, there is a high possibility that the combined heat and power supply apparatus 200 will stop due to the full heat storage amount. In this example, the “fourth display pattern” is “slow flashing”, and the “fifth display pattern” is “fast flashing”.

  Due to the difference in the light blinking pattern of the light indicator 103, what is the state of operation of the combined heat and power supply device (in this example, the amount of heat storage) with respect to the heat consumption of the user in terms of energy savings? Is notified. In addition, the user can obtain guidance on what kind of power consumption behavior or heat consumption behavior is preferable for improving energy saving performance by receiving notification by the optical display 103.

  For example, when the light displayed on the light indicator 103 is “slowly blinking”, the heat storage amount is smaller than the predicted value of the heat consumption amount. Therefore, in order to increase the heat storage amount of the heat storage device 202, the user Can provide guidelines such as increasing the power consumption of the power load or delaying the timing of heat consumption from the user's schedule. Further, when the light displayed on the light display 103 does not “blink”, the heat storage amount is sufficient for the predicted value of the heat consumption amount, and thus the power consumption behavior or the heat consumption behavior is executed as scheduled by the user. Is obtained. Moreover, when the light displayed on the light indicator 103 “flashes quickly”, the heat storage amount is approaching the full heat storage amount, and the heat storage device may eventually become full and the combined heat and power supply device may stop. Therefore, the user can obtain a guideline such as reducing the power consumption of the power load or making the timing of heat consumption (for example, hot water supply to the bath) earlier than the user's schedule. In the above-described display device, the light display 103 blinks to indicate the state of operation of the combined heat and power supply device (in this example, the amount of stored heat) in terms of energy saving with respect to the heat consumption of the user. Although it is shown by the difference in the pattern, it is not limited to this example, and the operating state of the combined heat and power supply device (in this example, the amount of heat storage) with respect to the user's heat consumption is in terms of energy saving. As long as it can be identified by the difference in the display pattern of the optical display, any form may be used. For example, you may employ | adopt the form which alert | reports the said energy-saving state to a user by the difference in the number of LED to light.

  In this case, for example, three LEDs are arranged, and when the heat storage amount is less than the heat amount 1, the first LED is turned on. When the amount of heat is between 1 and 2, the first and second LEDs are turned on. And when the calorie | heat amount 2 is exceeded, the form which makes 1st, 2nd, 3rd LED light is mentioned. In this example, the “fourth display pattern” is the first LED lighting, and the “fifth display pattern” is the first to third LED lighting. Also in this example, the display color of the light indicator 103 is the same as in the above example in what state the user's power consumption during the power generation operation of the cogeneration apparatus 200 is in terms of energy saving. The determined display color is configured so that the same color is lit from the first to third LEDs.

  In the above example, “fourth display pattern” and “fourth display pattern” are used as light display patterns for notifying the state of the heat storage amount of the combined heat and power supply device with respect to the heat consumption of the user in terms of energy saving. Although all of the “fifth display patterns” are displayed, a form in which either one of them is executed may be adopted.

  Further, in the above-described display device 100 of the present embodiment, the energy-saving state display for the user's power consumption as shown in FIGS. 3A and 3B and the combined heat and power device for the user's heat consumption shown in FIG. Although the form which performs the energy-saving state display with respect to the amount of stored heat by the optical display 103 is adopted, a form in which only the energy-saving state display for the power consumption is executed may be adopted.

  Next, in the above-described display device 100 of the present embodiment, what is the state of operation of the combined heat and power supply device 200 (in this example, the amount of heat storage) with respect to the heat consumption of the user in terms of energy savings. Although the form which alert | reports to a user with the blink pattern of the light indicator 103 was employ | adopted, it is not limited to this form. For example, instead of the energy saving state notification of the operation state of the combined heat and power supply apparatus 200 with respect to the user's heat consumption, a form of executing the energy saving state notification with respect to the integrated value of the user's power consumption may be adopted. In this case, instead of the heat quantity comparator 102 shown in FIG. 1, the predicted value of the cumulative power consumption in a predetermined period predicted by the predictor 207 and the cumulative power consumption detected by the power consumption detector 206 in the predetermined period. It is replaced with a cumulative power consumption comparator (not shown) that determines the blinking pattern of the light display 103 based on the value.

  FIG. 5 is a diagram describing a rule for determining the blinking pattern of the light indicator 103 based on the accumulated power generation amount for a predetermined period as described above. The predicted value of the cumulative power consumption in the figure is the cumulative power consumption for a predetermined period (in this example, one day) predicted by the predictor 207, and the power consumption 1 is based on the predicted value of the cumulative power consumption. Is a predetermined threshold value (in this example, 120% of the predicted value). As shown in FIG. 5, the light display 103 is “not blinked” when the cumulative value of the power consumption detected by the power consumption detector 206 is less than or equal to the predicted cumulative power consumption value predicted by the predictor 207. And decide. On the other hand, when the actual cumulative power consumption detected by the power consumption detector 206 exceeds the cumulative power consumption prediction value and is less than or equal to the power consumption 1, it is determined to “blink slowly”. If the power consumption exceeds 1, it is determined to “flash rapidly”.

  Therefore, when the light indicator 103 is blinking, the user recognizes that the accumulated power consumption in the predetermined period (in this example, one day) has already exceeded the predicted value, and improves the energy saving performance. Therefore, a guideline for reducing the power consumption of the power load can be obtained.

  In addition, when the energy display state notification from a plurality of viewpoints (in this example, power consumption and heat consumption, power consumption and cumulative power consumption) is simultaneously displayed by the optical display 103 as in the above-described embodiment, If the guidelines obtained from the status notification from the point of view are contradictory, appropriate selection may be performed as appropriate based on the judgment of the user. For example, when the predicted power consumption is less than the rated power generation amount as shown in FIG. 3A, the display color is “green”, and the heat storage amount ≦ the heat amount 1 is “slow flashing”, it is “green”. Therefore, a guideline that it is preferable not to increase the power consumption more than the user's schedule is obtained, but since it is “slow flashing”, a guideline to increase the power consumption to increase the heat storage amount of the combined heat and power supply apparatus 200 is obtained. In this case, it is selected by the user's judgment to increase the power consumption of the power load within a range where the display color does not become “red”.

  The display device according to the present invention can notify the user of the state of power consumption of the user during the power generation operation of the combined heat and power supply device in terms of energy saving, and the display device of the combined heat and power supply device Useful as such.

DESCRIPTION OF SYMBOLS 101 Electric energy comparator 102 Heat energy comparator 103 Optical display device 201 Cogeneration machine 202 Heat storage device 203 Power converter 205 Heat storage amount detector 206 Power consumption amount detector 207 Predictor 208 Operation planner

Claims (9)

A display device having an optical display for displaying, in a first display pattern, when the power consumption of the power load is larger than the rated power generation amount of the combined heat and power device during the power generation operation of the combined heat and power device. 2. The display device according to claim 1, wherein when the power consumption amount of the power load is equal to or less than a predicted value of the power consumption amount, the light indicator displays that fact in a second display pattern. . When the power consumption of the power load is larger than the predicted value of the power consumption and is equal to or less than the rated power generation amount of the combined heat and power device, the light indicator displays that in a third display pattern. The display device according to claim 1, wherein the display device is a display device. The display device according to claim 1, wherein the light indicator changes a display pattern in accordance with a cumulative value of a power consumption amount of the power load. The display device according to claim 4, wherein the light indicator changes the display pattern by comparing the accumulated value of the power consumption and the predicted value of the accumulated value. When the heat storage amount of the heat storage unit provided in the combined heat and power supply device is smaller than the predicted value of the heat consumption amount of the heat load, the light indicator displays that fact in a fourth display pattern. The display device according to claim 1. 2. The display device according to claim 1, wherein when the detected heat storage amount is equal to or greater than a predetermined threshold value that is smaller than a full heat storage amount, the light display displays that fact in a fifth display pattern. . The display device according to claim 1, wherein the display pattern is at least one of light color and light blinking frequency. A cogeneration apparatus comprising the display device according to claim 1 and a cogeneration apparatus.

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