JP2003122815A - Energy calculating method, energy calculating device, energy calculating system, computer program, and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an energy calculating method, an energy calculating device, an energy calculating system, a computer program, and a recording medium for calculating with high reliability by preventing a fall in the number of populations while adding various elements in the case of calculating a value to be the standard of energy consumption. SOLUTION: Element values respectively indicating a plurality of elements related to energy consumption are accepted (step S9). The element values and energy values recorded in an element item with the accepted element values as data are extracted from a plurality of records in the energy database that records the element values and energy values correspondingly (steps S10, 11). The respective extracted element values and energy values are made explanatory variables and object variables to compute a multiple regression expression (step S12), and a calculated energy value to be the reference of comparison is calculated by substituting the accepted element value in the computed multiple regression expression (step S13).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to energy consumption such as electricity, gas, and oil consumed in buildings such as various offices, accommodations, hospitals, and commercial buildings, and contract electricity.
Further, an energy calculation method for calculating energy consumption in a broad sense such as tap water supplied as a consumption object, an energy calculation device to which the method is applied, an energy calculation system using the device, and an apparatus for realizing the device. The present invention relates to a computer program and a computer-readable recording medium storing the program, and particularly to an energy calculation method, an energy calculation device, and an energy calculation system for calculating a calculation value used for comparison with an actual value of energy consumption. The present invention relates to a computer program and a recording medium.

[0002]

2. Description of the Related Art There is a strong interest in energy saving to save energy consumption such as electricity, gas, and oil consumed in buildings such as offices, accommodations, hospitals, and commercial buildings. ing. For this reason, there is provided a service in which a standard energy value is calculated on a web page provided via a communication network such as the Internet and the degree of energy saving is determined by comparing the calculated energy value.

A first method for calculating a standard energy value is to show the use of buildings such as various offices, accommodations, hospitals, and commercial buildings, total floor area, and annual energy consumption. It accepts the input of energy consumption value, extracts the record of the same purpose as the entered purpose from the data stored in advance in the database, and expands the annual energy consumption of each energy contained in the extracted record. This is a method of calculating the average value of the energy consumption basic unit divided by the area as the reference energy value, and comparing the value of the received annual consumption amount of energy by the total floor area with the reference energy value. Therefore, the degree of energy saving is determined.

The second method for calculating the reference energy value is not only the use, the total floor area, and the annual energy consumption, but also various factors such as the number of floors, the age of the building, the air conditioning system, and the heat source system. Accept the input, extract the records of the same condition from the data that has been databased in advance,
This is a method of calculating the average value of the energy consumption basic unit based on the data contained in the extracted records as the reference energy value, and the value obtained by dividing the accepted annual consumption of energy by the total floor area becomes the reference. The degree of energy saving is determined by comparing with the energy value.

[0005]

However, the energy consumption of a building is affected by various factors such as the number of employees, the number of floors, the age of the building, the air conditioning system, and the heat source system.
The conventional first method of calculating the reference energy value only by the building use and the total floor area has a problem that it is not reliable as a reference for comparison.

The second conventional method is a method of performing detailed analysis using various elements. However, as the number of elements is increased to perform detailed analysis, usable data having all elements can be used. There is a problem that reliability is lacking due to a small number of data in the population and a decrease in the number of data in the population, and it is difficult for the data input side to prepare all data of various elements. .

The present invention has been made in view of such circumstances, and various data stored in advance in a database by receiving data and energy consumption values indicating energy consumption for elements selected from a plurality of elements. Data of the selected element and the energy value to be the reference are extracted from the data, and a multiple regression equation is calculated with the extracted data and energy value of the element as the explanatory variable and the objective variable, respectively. By comparing the calculated energy consumption basic unit with the calculated energy consumption basic unit calculated based on the multiple regression equation to show the degree of energy saving, various factors are taken into consideration, and the partial regression coefficient is calculated for each element. It has high reliability by performing multiple regression analysis to calculate, and data of all elements is not necessarily required, so prepare data to be input easily. Energy calculation method, energy calculation device to which the method is applied, energy calculation system using the device, computer program for realizing the device, and computer readable recording the program The purpose is to provide a stable recording medium.

[0008]

An energy calculation method according to a first aspect of the present invention is an energy calculation method for calculating the energy consumed in a building, wherein a plurality of element items related to the energy consumption of the building are stored in advance. An energy database in which each element value and an energy value indicating consumed energy are associated with each other is set, element values of some or all of the plurality of element items are accepted, and element values are accepted. The element value and energy value recorded in the element item are extracted from the energy database, and the extracted multiple elemental value and energy value are calculated as an explanatory variable and an objective variable, respectively, and the calculated multiple linear regression expression is accepted. It is characterized in that the calculated energy value is calculated by substituting the calculated element value.

In the energy calculation method according to the first aspect of the present invention, a multiple regression equation based on the element values and energy values of some or all of the plurality of element items is calculated, and the calculated multiple regression equation is accepted. By substituting the element value and calculating the calculated energy value for the purpose of comparison with the consumed energy, the calculated energy value is a value that takes various elements into account, so it is highly reliable and Since multiple regression equations are calculated for each combination, it can be used even if it does not have all element items, so there is no decrease in reliability due to a decrease in the number of data in the population, and not all elements are required. It is possible to prepare the data to be input easily because the above data is not required.

An energy calculating device according to a second aspect of the present invention is an energy calculating device for calculating energy consumed in a building, wherein each element value of each of a plurality of element items related to energy consumption of the building, and consumption. A means for accessing an energy database for recording energy values indicating energy, a means for accepting element values of some or all of the plurality of element items, and an element item for which an element value is accepted The recorded element value and energy value are extracted from the energy database, and the extracted element value and energy value are accepted as a means for calculating a multiple regression equation as an explanatory variable and an objective variable, respectively, and the calculated multiple regression equation. Means for substituting the element value and calculating the calculated energy value.

In the energy calculating device according to the second aspect of the present invention, a multiple regression equation based on the element values and energy values of some or all of the plurality of element items is calculated, and the calculated multiple regression equation is accepted. By substituting the element value and calculating the calculated energy value for the purpose of comparison with the consumed energy, the calculated energy value is a value that takes various elements into account, so it is highly reliable and Since multiple regression equations are calculated for each combination, it can be used even if it does not have all element items, so there is no decrease in reliability due to a decrease in the number of data in the population, and not all elements are required. It is possible to prepare the data to be input easily because the above data is not required.

The energy calculation device according to the third invention is the second invention.
In the invention, the energy value is an energy intensity unit obtained by dividing the energy consumption amount by the total floor area of the building, and the accepted element value includes an element value indicating the total floor area, It is characterized by comprising means for accepting the consumed energy value shown and means for calculating the consumed energy basic unit by dividing the accepted consumed energy value by the element value indicating the total floor area.

In the energy calculation device according to the third aspect of the present invention, by using the consumed energy intensity, it is possible to easily compare with the calculated energy intensity.

An energy calculation device according to a fourth aspect of the present invention is the second aspect.
In the invention or the third invention, a means for normalizing the partial regression coefficient of each term of the multiple regression equation by a predetermined method, a means for comparing the standardized partial regression coefficients, and a result of comparison And means for extracting a term that satisfies a predetermined condition.

In the energy calculating apparatus according to the fourth aspect of the present invention, the standardized partial regression coefficients are compared and a predetermined condition, for example, a term having the largest value is extracted, so that the item having the largest influence on the energy consumption value, that is, It is possible to show the most effective measures for reducing energy consumption.

An energy calculation system according to the fifth invention is
The energy calculation device according to any one of the second invention to the fourth invention, and a terminal device connected to the energy calculation device through a communication network, wherein the terminal device is used for energy consumed in a building. The energy calculation device comprises: means for accepting an input of an element value of a part or all of the element items in a plurality of related element items; and means for sending the accepted element value to the energy calculation device. It is characterized by comprising means for sending the calculated result to the terminal device.

In the energy calculation system according to the fifth aspect of the present invention, it is possible to improve convenience by providing the service as a web page via a communication network such as the Internet.

A computer program according to a sixth aspect of the present invention is a computer program for causing a computer to perform calculation regarding energy consumed in a building, wherein each of a plurality of element items related to energy consumption of the building is caused by the computer. When the element value of some or all of the element items recorded in the energy database that records the element value and the energy value indicating the consumed energy in association with each other is accepted, A procedure for extracting the element value and energy value recorded in the accepted element item from the energy database, and causing a computer to calculate a multiple regression equation using the extracted element value and energy value as the explanatory variable and the objective variable, respectively. Calculation is performed by substituting the accepted element values in the calculated multiple regression equation into the procedure and computer. Characterized in that it comprises a procedure for computing the Nerugi value.

In the computer program according to the sixth aspect of the present invention, the computer operates as an energy calculation device by being executed by a computer such as a web server computer. Therefore, some or all of the plurality of element items are included. Calculate the multiple regression equation based on the element value and energy value, substitute the accepted element value in the calculated multiple regression equation,
By calculating the calculated energy value for the purpose of comparison with the consumed energy, the calculated energy value is a value that takes various elements into account, so it is highly reliable, and a multiple regression equation is used for each combination of accepted element values. Since it is calculated, it can be used even if it does not have all the element items, so there is no decrease in reliability due to a decrease in the number of data in the population, and data for all elements is not necessarily required. It is possible to prepare data to be input easily.

A computer-readable recording medium according to the seventh aspect of the present invention is a computer-readable recording medium in which a computer program for causing a computer to perform calculation regarding energy consumed in a building is recorded. In the recording medium, a computer is provided with each element value of a plurality of element items related to energy consumption of the building,
And the element value of the element item of some or all of the plurality of element items recorded in the energy database that records the energy value indicating the consumed energy in association with each other, the element that has accepted the element value A step of extracting the element value and the energy value recorded in the item from the energy database, and a step of causing the computer to calculate the multiple regression equation having the extracted element value and the energy value as the explanatory variable and the objective variable, respectively. It is characterized in that a computer program including a procedure for substituting the received element values into the calculated multiple regression equation and calculating the calculated energy value is stored in the computer.

In the computer-readable recording medium according to the seventh aspect of the present invention, the computer operates as an energy calculation device by executing the recorded computer program on a computer such as a web server computer. Calculate multiple regression equations based on the element values and energy values of some or all of the multiple element items, substitute the accepted element values in the calculated multiple regression equations, and compare with the energy consumption. By calculating the target calculated energy value, the calculated energy value is a value with various elements taken into account, so it is highly reliable, and since the multiple regression equation is calculated for each combination of accepted element values, Since it can be used even if it does not have all the element items, there is no decrease in reliability due to the decrease in the number of data in the population. It is possible to prepare data to be easily input since it does not require the data of all the elements servant.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below with reference to the drawings showing the embodiments thereof. FIG. 1 is a block diagram showing the configuration of the energy calculation system of the present invention. 10 in the figure
Is an energy calculation device of the present invention using a web server computer, and the energy calculation device 10 is connected to a communication network NW such as the Internet. Then, the energy calculation device 10 supplies electricity, gas, and oil consumed in buildings such as various offices, accommodations, hospitals, and commercial buildings, and energy consumption such as contract electricity, and is also supplied as a consumption target. The calculation of energy consumption in a broad sense such as tap water is performed, and a service indicating an index for energy saving is provided in the form of an energy calculation web page to the terminal device 20 using a personal computer via the communication network NW.

The energy calculation device 10 includes an auxiliary storage means 12 such as a CD-ROM drive for reading information from a recording medium REC such as a CD-ROM in which information such as a computer program PG and data for the energy calculation device of the present invention is recorded. The recording means 13 includes a recording means 13 such as a hard disk for recording information such as the computer program PG and data read by the auxiliary storage means 12, and a communication means 15 connected to the communication network NW. The information is read and stored in the RAM 14 that stores information such as the progress of calculation, and is executed by the CPU 11, so that the web server computer operates as the energy calculation device of the present invention.

The recording means 13 has an HTML (Hyper T
ext Markup Language)
An energy calculation web page for performing a predetermined process using an interface such as CGI (Common Gateway Interface) is recorded. Further, a part of the recording area of the recording means 13 is used as various databases such as an energy database 10a which records the element values indicating a plurality of elements related to energy consumption and the energy values indicating consumed energy in association with each other. According to the above, access is performed and information recording / reading is performed. Instead of using a part of the recording area of the recording means 13 as various databases such as an energy database, another recording device connected to the energy calculation device 10 may be used as various databases.

The terminal device 20 includes a CPU 21 and a recording means 2.
2, a RAM 23, a communication unit 24, an input unit 25 such as a mouse and a keyboard, and an output unit 26 such as a monitor and a printer, and the recording unit 22 includes a browsing software program (hereinafter referred to as a browser) for browsing a web page. Various computer programs of are recorded.

FIG. 2 is an explanatory view conceptually showing the recorded contents of the energy database 10a included in the energy calculation device 10 of the present invention. The energy database 10a includes
Energy consumption such as electric power, total floor area, energy basic unit obtained by dividing energy consumption by total floor area, number of employees, number of floors, year of completion, heat source method, air conditioning method, application, and various element items such as area , Are recorded as records each having data such as an energy value or various element values, and an ID is given to each record. Note that the energy consumption amount and total floor area and the energy intensity calculated from them must be recorded with the energy consumption value and the element value, respectively. The element value does not necessarily have to be recorded. In addition, element items such as heat source method, air conditioning method, application, and area include small items such as various offices, accommodation facilities, hospitals, and commercial buildings. 1 is recorded, and 0 is recorded as an element value in a sub-item that does not correspond. It is also possible to add items such as items indicating an energy saving system such as automatic blinking of lights, natural ventilation, and use of solar heat as items not shown. By adding such items, energy saving can be achieved. It is possible to grasp the response to

Next, the processes of the energy calculation device 10 and the terminal device 20 used in the energy calculation system of the present invention will be described with reference to the flowcharts shown in FIGS. An operator who wants to receive the service in the form of an energy calculation web page operates the terminal device 20, activates a browser, connects the terminal device 20 to the communication network NW, and is recorded in the energy calculation device 10. Access the energy calculation web page. The energy calculation device 10 receives the access from the terminal device 20, and sends the energy calculation web page to the terminal device 20 (step S).
1).

The terminal device 20 receives the energy calculation web page (step S2) and outputs the received energy calculation web page (step S3).

FIG. 5 is an explanatory diagram showing an image output from the terminal device 20 used in the energy calculation system of the present invention. In the energy calculation web page output from the terminal device 20, a column for inputting required items such as energy consumption value indicating energy consumption such as electric power and element value indicating total floor area, and use of building (building type) , Address (region),
The fields for entering various element values such as the year of completion, the heat source method, and the air conditioning method are shown.

The operator who confirms the energy calculation web page inputs the energy consumption value indicating the energy consumption,
Further, by selecting part or all of the element value indicating the total floor area and various other element items, inputting the element value of the selected element item, and inputting the energy consumption value and the element value to the energy calculation device. In order to send, the cursor is superimposed on the image indicated as send and the input button is pressed. The terminal device 20 receives the input of the energy consumption value (step S4), and further receives the input of the element value of the selected element item (step S5). Then, the input consumed energy value is sent to the energy calculation device 10 (step S6), and the input accepted element value is sent to the energy calculation device 10 (step S7).

The energy calculation device 10 receives the consumed energy value (step S8), and further receives the element value (step S9). The element value recorded in the element item that has received the element value is extracted from each of the plurality of records in the energy database 10a (step S10), and the value recorded in the item of energy intensity is used as the energy value. It is extracted from a plurality of records in the database 10a (step S11). Then, the multiple regression equation is calculated by using each element value extracted from each record as an explanatory variable and the energy value indicating the value of the energy intensity unit extracted from each record as an objective variable (step S1).
2).

For example, the element items are a1, a2, a3, a
When the element values of all the element items are accepted in the case of 5 of 4, and a5, the multiple regression equation shown in Expression 1 is calculated, and the element values of the element items of a1, a3, and a5 are accepted. At times, the multiple regression equation shown in Equation 2 is calculated.

[0033]   β11 / X1 + β21 / X2 + β31 / X3 + β41 / X4 + β51 / X5 + β10                                                         ...... Equation 1   β12 / X1 + β32 / X3 + β52 / X5 + β20                                                         ...... Formula 2       However, β11 to β51 and β12 to β52: partial regression coefficient             β10 and β20: constant term             X1 to X5: Factors corresponding to each element item

As shown in the equations 1 and 2, the multiple regression equation is calculated differently according to the number and kind of the selected element items, and among the records recorded in the energy database 10a. Even if the record does not include all the element values, it can be used as the population data as long as it includes the element values of the selected element item.

By substituting the element values received from the terminal device 20 into the multiple regression equation calculated in this way, a calculated energy value which is a value indicating a basic unit of calculated energy as a reference for comparison with the consumed energy value is obtained. Calculate (step S13).
Then, the energy consumption value received in step S8 is
By dividing by the element value indicating the total floor area accepted in step S9, the consumed energy basic unit that can be compared with the calculated energy basic unit indicated by the calculated energy value is calculated (step S14).

Further, the partial regression coefficients of each term of the multiple regression equation are standardized so that the average value is 0 and the standard deviation is 1 (step S15), and the standardized partial regression coefficients are compared. (Step S16) Based on the comparison result, a term that satisfies the condition that the standardized partial regression coefficient has the largest value is extracted (step S17). The item indicated by the term having the largest standardized partial regression coefficient is the item having the largest effect on the energy consumption value, and can be proposed as the most effective measure for reducing the energy consumption.

Then, the calculated energy basic unit indicated by the calculated energy value calculated in step S13, the consumed energy basic unit calculated in step S14, and the term extracted in step S17 are sent to the terminal device 20 as a calculation result web page. Send (step S18).

In the terminal device 20, the calculated energy basic unit, the consumed energy basic unit, and the extracted term are accepted as the calculation result web page (step S19), and the accepted calculated energy basic unit, the consumed energy basic unit, and the extracted term are received. Is output as a calculation result web page (step S20).

FIG. 6 is an explanatory diagram showing an image output from the terminal device 20 used in the energy calculation system of the present invention. In the calculation result web page output from the terminal device 20, the standard deviation showing the consumption energy basic unit, the calculated energy basic unit, and the statistically calculated dispersion of the calculated energy basic unit is described above. In the center, a logarithmic graph is shown in which the horizontal axis represents the total floor area and the vertical axis represents the electric energy consumption as the annual energy consumption. The straight line in the graph shows the relationship between the total floor area and the energy consumption based on the multiple regression equation, the points based on each record recorded in the energy database 10a are plotted as black circles, and are input by the operator. Points based on energy consumption values and element values are plotted as open circles.

The energy saving degree is shown below the graph, and the term extracted in step S17 is further below.
It is shown as a proposal of the most effective measure for reducing the basic unit of energy consumption, and the heat source method corresponds to it in the example of FIG. At this time, if the item includes an energy saving system such as automatic blinking of lighting, natural traffic, and solar heat utilization, it is possible to propose to adopt a total heat exchanger as an energy saving measure, Moreover, by recalculating using the multiple regression equation, it becomes possible to show the energy consumption basic unit when the proposed energy saving measure is implemented.

The energy saving degree is a value obtained by subtracting the calculated energy basic unit from the consumed energy basic unit, divided by the standard deviation of the calculated energy basic unit, and the difference between the consumed energy basic unit and the calculated energy value. It is standardized. Note that the calculation result is not shown as a numerical value on the web page, but is shown as one of the five levels of judgment obtained from the calculated numerical value.

In the above embodiment, the energy value is
Although the form using the energy basic unit obtained by dividing the energy consumption amount by the total floor area of the building has been shown, the present invention is not limited to this, and various values such as the energy consumption amount itself and the energy consumption amount per person can be used. Can be used. Also, as energy, not only electricity but also various types of energy such as energy consumption of gas and oil and contract electricity, and energy consumption in a broad sense such as tap water supplied as a consumption target can be used. Further, it is also possible to convert different types of energy into one type of energy by using a predetermined coefficient and compare them.

Further, in the above embodiment, the terminal device 20
Although the energy calculation device 10 is accessed via the communication network NW from the above, the present invention is not limited to this, and the energy calculation device 10 is used in a stand-alone manner to calculate the element value and the energy value. Alternatively, the energy calculation device 10 may output the calculation result.

[0044]

As described above in detail, the energy calculation method, the energy calculation device, the energy calculation system according to the present invention,
In the computer program and the recording medium, the acceptance element value and the acceptance energy usage amount value of the element selected from the plurality of elements are accepted to calculate the acceptance energy consumption basic unit, and various recording element values stored in a database in advance. And a recording energy value are extracted, a multiple regression equation is calculated using the extracted recording element value and recording energy value as an explanatory variable and an objective variable, respectively, and the acceptance element value is substituted into the calculated multiple regression equation to calculate a theoretical energy value. Is calculated and the received energy consumption basic unit and the theoretical energy value are compared, the theoretical energy value is a value that takes various elements into account, so it is highly reliable, and multiple regression is performed for each combination of the received element values. Since the formula is calculated, it can be used even if it does not have all the elements, so the reliability decreases due to the decrease in the number of data in the population. No, etc. is always possible to prepare data to be easily input since it does not require the data of all the elements, an excellent effect.

[Brief description of drawings]

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

FIG. 2 is an explanatory diagram conceptually showing the recorded contents of an energy database included in the energy calculation device of the present invention.

FIG. 3 is a flowchart showing processing of an energy calculation device and a terminal device used in the energy calculation system of the present invention.

FIG. 4 is a flowchart showing processing of an energy calculation device and a terminal device used in the energy calculation system of the present invention.

FIG. 5 is an explanatory diagram showing an image output from a terminal device used in the energy calculation system of the present invention.

FIG. 6 is an explanatory diagram showing an image output from a terminal device used in the energy calculation system of the present invention.

[Explanation of symbols]

10 Energy calculation device 20 terminal devices NW communication network PG computer program REC recording medium

Claims (7)

[Claims] 1. An energy calculation method for calculating energy consumed in a building, wherein each element value of a plurality of element items related to energy consumption of the building and an energy value indicating consumed energy are associated with each other. The attached energy database is set, the element values of some or all of the plurality of element items are accepted, and the element value and the energy value recorded in the element item that accepts the element value are set as energy values. Calculates the calculated energy value by extracting from the database, calculating the multiple regression equation using the extracted element value and energy value as the explanatory variable and the objective variable, and substituting the accepted element value into the calculated multiple regression equation. An energy calculation method characterized by the above. 2. An energy calculation device for calculating energy consumed in a building, wherein element values of a plurality of element items related to energy consumption of a building are associated with energy values indicating consumed energy. Means for accessing an energy database to be recorded, means for accepting element values of some or all of the plurality of element items, and element values and energy recorded in the element items for which the element values have been accepted. A value is extracted from the energy database, and the calculated element value and energy value are calculated by substituting the accepted element value into the calculated multiple regression expression with a means for calculating the multiple regression expression as the explanatory variable and the objective variable, respectively. Means for calculating an energy value, and an energy calculation device. 3. The energy value is an energy intensity unit obtained by dividing an amount of energy consumption by a total floor area of a building, and the accepted element value includes an element value indicating a total floor area. 3. A unit for receiving a consumed energy value indicating an amount, and a unit for calculating the consumed energy basic unit by dividing the received consumed energy value by an element value indicating a total floor area. The energy calculation device described. 4. A means for standardizing the partial regression coefficient of each term of the multiple regression equation by a predetermined method, a means for comparing the standardized partial regression coefficients, and a predetermined value based on the result of the comparison. 4. An energy calculation device according to claim 2, further comprising means for extracting a term satisfying the condition of. 5. The energy calculation device according to claim 2, and a terminal device connected to the energy calculation device via a communication network, wherein the terminal device is a building. A plurality of element items related to consumed energy, a means for receiving an input of an element value of a part or all of the element items, and a means for sending the element value of which the input is received to the energy calculation device, The energy calculation device comprises means for sending the calculated result to the terminal device. 6. A computer program for causing a computer to perform calculation on energy consumed in a building, the computer program displaying each element value of a plurality of element items related to energy consumption of the building and energy consumption. When the element values of some or all of the plurality of element items recorded in the energy database that records the energy values shown in association with each other are received, the element values are recorded in the element item that received the element value. The extracted element value and energy value from the energy database, the computer calculates the multiple regression equation using the extracted element value and energy value as the explanatory variable and the objective variable, respectively. Substituting the accepted element values into the multiple regression equations, and calculating the calculated energy value. A computer program characterized by. 7. A computer readable recording medium having a computer program for causing a computer to perform calculations relating to energy consumed in a building, the computer being associated with the energy consumption of the building. The element values of some or all of the plurality of element items recorded in the energy database that records the element values of the plurality of element items and the energy value indicating the consumed energy in association with each other. When accepted, the procedure for extracting the element value and energy value recorded in the element item for which the element value is accepted from the energy database, and the extracted element value and energy value in the computer are explained as explanatory variables and objective variables, respectively. The procedure for calculating the multiple regression equation and the factors accepted by the computer for the calculated multiple regression equation A computer-readable recording medium having recorded therein a computer program including a procedure for substituting a value and calculating a calculated energy value.