JP2001159909A - Energy management system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an energy management system capable of quickly executing improvement for calculating energy consumption in a form being close to the actual situation and efficiently executing production. SOLUTION: The energy management system is provided with a process management means 1 for managing the product numbers of products produced by respective production lines A to Z, the number of products, the operation states of the production lines A to Z, and the consumption of energy incidentally used for the production lines A to Z and equipment in which the production lines A to Z are installed and an energy management means 2 for calculating the consumption of energy incidentally used for the production of products on the basis of information from the means 1 and a previously set division ratio, adding the calculated energy consumption to the energy consumption used for the production lines A to Z as total energy consumption following the production of products and calculating the original unit of a product by dividing the total energy consumption by the number of products. The means 2 calculates the original unit in each article number of a product.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an energy management system for managing energy used for producing products.

[0002]

2. Description of the Related Art Conventionally, attempts have been made to effectively use energy such as electric power used for equipment in a factory (for example, see Japanese Patent Application Laid-Open No. Hei 6-262223).

[0003] In a factory facility equipped with a production line, the energy consumption such as electricity required for production of a product in each production line is calculated to grasp the energy consumption for the production of a specific product. An attempt has been made to efficiently produce each product by devising a production process of the product on a production line using the result.

[0004] For example, the amount of energy, such as electricity, required for the production of products on a production line is periodically read by a worker once a month, and the amount of energy used on the production line is measured. By allocating based on the production results of each product, the amount of energy used for each product is calculated, and the above-mentioned energy consumption is managed mainly on the production line.

[0005]

However, the energy required for the production of products is not limited to the production line, and the energy of the entire equipment in which the production line is installed is partially used, and the utility and production planning are not limited. Energy is also indirectly used in offices and the like used when creating such items.

For example, in a production line or the like for producing a product by an extruder, it is necessary to supply a raw material to the extruder, and ancillary equipment for supplying the raw material also uses energy such as electric power. .

Furthermore, since the operation state of the production line is not reflected in the above-mentioned management of the amount of energy used, it is not possible to grasp later, for example, the state during operation or during setup which does not directly contribute to production. Even if an attempt is made to make an improvement based on the collected data, it is difficult to obtain an effective improvement measure, and there is no choice but to wait for the result of the improvement for the time being and make a quick response.

In other words, conventionally, the amount of energy used in the production of products has only been roughly controlled, and improvements are made to reduce the amount of energy used and to achieve efficient production quickly. The above data was practically difficult to use.

The present invention has been made in view of the above problems, and calculates the amount of energy used for the production of a product in a substantial form closer to the actual situation, and reduces the amount of energy used to produce the product efficiently. It is an object of the present invention to provide an energy management system capable of promptly making improvements for the energy management.

[0010]

An energy management system according to a first aspect of the present invention is a system for managing an amount of energy used for producing a product,
A process management means for managing the product number of the product produced on the production line, the production amount, the operation status of the production line, and the amount of energy used incidentally by the production line and the equipment on which the production line is installed; and Based on the information from the process management means, calculate the amount of energy incidentally used in the equipment in accordance with the production of the product based on a preset apportionment rate, and the amount of energy used,
Energy management means for calculating the amount of energy used in the production line as the total amount of energy used in the production of the product, and dividing the total amount of energy by the amount of production to calculate the unit consumption of the product. It is a thing.

According to a second aspect of the present invention, in the energy management system, the energy management means calculates a basic unit for each product number.

In the energy management system according to the third aspect of the present invention, the energy used incidentally in the facility includes energy used in incidental facilities required for production on a production line, and a common part of the facility, such as a common part of the facility. Energy used, and the energy management means allocates the energy used in the entire facility as energy required for the production of the corresponding product according to a preset apportionment rate. The energy is allocated as the energy required for the production of the corresponding product in accordance with the ratio of the equipment contributing to the production line.

According to a fourth aspect of the present invention, in the energy management means, a management value curve of a basic unit corresponding to a production amount of each product is previously set in the energy management means. This is to compare the calculated basic unit of the product and inform the user of the comparison result.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic configuration of the energy management system of the present invention. This energy management system uses electricity, steam, industrial water,
This is a system for managing the usage of energy such as gas, and is roughly composed of a process management means 1 and an energy management means 2. In this embodiment, electric power will be described as an example of the above energy.

In the process control means 1, each of the production lines AZ
Process management such as the product number and production amount of products produced in the production line and the operation status of the production lines A to Z,
The power consumption actually used by the production lines A to Z and the associated equipment is managed, and the above-described various information is input to a process management computer 11 which is a main part of the process management means 1.

Each of the production lines A to Z is a line provided with peripheral devices such as an extruder and a conveying device, for example. The raw materials are supplied to the lines AZ to extrude the product. In each of the production lines A to Z and each of the raw material supply devices a to c, there is provided a measuring device 12 for measuring the amount of electric power actually used in each of the production lines A to Z and each of the raw material supply devices a to c. The data of the power consumption measured by each measuring device 12 is input to the process management computer 11 through the communication controller 13.

From the viewpoint of the entire facility of the factory where the production lines A to Z are installed, the electric power is supplied to the production line A described above.
ＺZ and the raw material supply devices a〜c, as well as utilities and lighting and air conditioners installed in the entire facility such as office d. Is also measured by the measuring device 12, and the data of the power consumption is input to the process management computer 11 through the communication controller 12.

The data on the amount of power consumption measured by each measuring instrument 12 is stored in the energy management computer 21 which is a main part of the energy management means 2 through the process management computer 11 in, for example, about 10 minutes.

In the process management computer 11,
Various products produced in each of the production lines A to Z are specified by a product number, and the production amount of the product specified by the product number is input as a production signal.

Further, in addition to the above information, data on the operation status of each of the production lines A to Z is input to the process management computer 11.

The operation status is, for example, during operation, during a trouble stop, during setup, during planned suspension, and the like. The operation status in each of the production lines AZ is managed by the process management computer 11. As a specific method for judging the operation status by the process management computer 11, a normal operation signal is input to the process management computer 11 during operation, and an alarm signal is output at the corresponding production line during trouble stop. Is input to the process management computer 11, for example, during setup for mold exchange or the like, an operation signal or the like at that time is input to the process management computer 11 for determination. In addition, during the planned suspension, since the production process in each of the production lines A to Z is input to the process management computer 11 in advance, the determination is made based on this, together with the operation signal and the like. The operation status data is stored in the energy management computer 21 through the process management computer 11, for example, in units of about 10 minutes, similarly to the power consumption data described above.

The energy management means 2 is, as described above, an energy management computer 2 which is a main part thereof.
The energy management computer 21 includes an energy management computer 21 based on the various types of information input from the process management computer 11, and based on the various types of information, an amount of power used for producing a product produced in each production line. Calculate as a unit.

First, the amount of electric power used in each of the production lines A to Z is allocated to each product based on the product number.

Further, the amount of electric power used for the lighting of the whole facilities such as utilities and offices d and the air conditioner is allocated to each of the production lines A to Z based on a predetermined apportioning rate. The used power amount is allocated to each of the production lines A to Z as the power consumption amount of the product produced at that time based on the product number specifying the product. Note that the proportion is set to 1 for the entire production line based on various factors such as the magnitude of power consumption due to the difference in the scale of each production line.

Further, the amount of electric power used in each of the raw material supply devices a to c is determined by the weight ratio of the raw material supplied from each of the raw material supply devices a to c to each of the production lines A to Z. Is assigned based on the product number as the power consumption of the product being produced at that time. For example, during a certain period, the production line A and the production line B
If the raw materials are evenly supplied to the production line A, the power supply amount used by the raw material supply device a during the period is reduced by half to the product number produced on the production line A and the production amount produced on the production line B. To the product number of the product. Similarly, electric power consumption is allocated according to the ratio of each of the raw material supply devices a to c contributing to each of the production lines A to Z.

Then, the total of the electric power consumption for each of the product numbers allocated as described above in each of the production lines A to Z is calculated, and this total of the electric power consumption is divided by the production amount of the product number (specific product). To calculate the basic unit of electric energy.

That is, (the basic unit of the product of a certain product number) =
(Sum of power consumption for the part number) / (production amount of the part number).

In the present embodiment, when a certain production line is in a planned halt, the power consumption during the planned halt is not reflected in the calculation of the basic unit. Whether or not to reflect the amount in the calculation of the basic unit, or in the case of reflecting the amount, the method of calculating the power consumption may be appropriately set according to the status of each facility.

Further, the energy management means 2 can calculate not only the basic unit for each product number for one production line, but also the basic unit for each product number for all production lines as described above.

The basic unit calculated as described above is calculated on a daily basis and also based on the cumulative value for the past month, and if necessary, the cumulative value for a predetermined period such as two months. Can be performed based on

The above is the calculation of the basic unit for the amount of electric power used. However, the amount of use of energy such as steam, industrial water and gas can also be calculated as the basic unit in the same manner as described above. That is, the amount of use of each energy is measured by measuring the amount of use of steam, industrial water, gas, and the like by a measuring instrument provided on each line and the like, and calculating the amount of incidental use based on the apportionment rate. Can be calculated as the basic unit of the product.

As described above, the amount of energy used in the entire facility, which has not conventionally been a factor for calculating the amount of consumption, is also calculated, and the amount of energy used in producing each product is calculated based on the amount of energy used. By calculating as a unit, the energy consumption can be calculated in a substantial form closer to the actual situation.

Then, the energy management computer 2
In 1, a management value curve corresponding to a basic unit calculated for each product number that specifies each product is set in advance as data. This management value curve is an index for efficiently using electric power and the like in the production of a product. As shown in FIG. 2, the horizontal axis represents the production amount of the product, and the vertical axis represents the production amount of the product. By comparing the control value curve with the basic unit for the current production amount, and notifying the user of the comparison result by a display device or a printing device described later, Whether the current energy consumption for production is appropriate or not can be easily grasped.

Next, the calculation result of the basic unit described above is displayed in a form that is easy for the user to grasp, such as a screen 22a of the display device 22 as shown in FIG.

On the screen 22a of the display device 22, the basic unit calculated for each energy, for example, for each month, is displayed for one year by a line graph, and at the same time, the used amount is displayed by a bar graph.

On the screen 22a of the display device 22, is a display section for displaying a product number for specifying the product. By specifying a desired product number on this display section, it is necessary to produce a product corresponding to this product number. Each basic unit and each usage amount are displayed. Further, is a display unit for displaying a production line, and by specifying a desired production line on this display unit, each basic unit and each usage amount required for the production of the product specified in the production line can be obtained. Is displayed. In addition, a display unit for specifying the type of energy, and a display unit for specifying the year, for example, for the product on the production line specified in the above, specified in the upper line in the year specified in the upper line The basic unit and the amount of energy used for each type of energy are shown in a line graph and a bar graph in the form shown in the upper part.

The lower part of the screen 22a shows a comparison of the basic units for each fiscal year, for example, showing the increase / decrease of the basic units in the same month from the current year and the designated year.

By displaying on the screen 22a of the display device 22 in this way, the user can accurately grasp the transition of the amount of energy used, and which line is inefficient in the amount of energy used. In order to use energy efficiently, it is possible to easily find a countermeasure such as which product should be produced on which production line, and the improvement can be promptly taken.

Further, in the display device 22, as shown in FIG. 4, the screen 22b displays on the screen 22b the amount of energy used for the production of the product for a certain period and the operation status of the production line at that time. Are displayed so that they can be compared in the upper and lower directions, so that the improvement for efficient production as described above can be further facilitated.

[0041]

As described above, according to the energy management system of the present invention, the amount of energy used for the production of products is also taken into account by taking into account the energy used in the auxiliary equipment of the production line and the entire equipment. Since it is calculated as a basic unit, it is possible to calculate the amount of energy used for the production of each product with an accurate value closer to the actual situation, and to improve the efficiency of production by reducing the amount of energy used Can be effectively used as data for performing

[Brief description of the drawings]

FIG. 1 is a block diagram showing a schematic configuration of an energy management system of the present invention.

FIG. 2 is a diagram showing a management value curve preset in an energy management computer.

FIG. 3 is a diagram illustrating an example of a display screen of a display device.

FIG. 4 is a diagram illustrating an example of a display screen of a display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Process management means 11 Computer for process management 2 Energy management means 21 Computer for energy management

Claims (4)

[Claims] 1. A system for managing the amount of energy used for the production of a product, comprising: a product number, a production amount, an operation status of the production line, and production of a product produced on a production line. A line and process control means for managing the amount of energy used incidentally in the equipment in which the production line is installed, and incidental in the equipment in accordance with the production of the product based on information from the process control means. The amount of energy used for the calculation is calculated based on a preset apportionment rate, and the amount of energy used and the amount of energy used in the production line are defined as the total amount of energy used in producing the product,
An energy management system comprising: energy management means for dividing the total amount of energy used by the production amount to calculate a unit consumption of a product. 2. The energy management system according to claim 1, wherein said energy management means calculates a basic unit for each product number. 3. The energy used incidentally in the facility is energy used in the incidental facility necessary for production in a production line, energy used in the entire facility such as a common part of the facility, and the energy management means. Then, the energy used in the entire facility is allocated as the energy required for the production of the corresponding product according to a preset apportionment ratio, and the energy used in the incidental facilities is determined according to the ratio of the incidental facilities to the production line. The energy management system according to claim 1, wherein the energy is allocated as energy required for production of the corresponding product. 4. A management value curve of a basic unit corresponding to the production amount of each product is set in the energy management means in advance, and the management value curve is compared with the calculated basic unit of the product. 4. The energy management system according to claim 2, wherein the comparison result is notified to a user.