Agricultural greenhouse design auxiliary device and computer-readable recording medium

Abstract

This device recovers heat energy discharged from various machines / equipment, promoting the construction of agricultural greenhouses on a scale commensurate with the effective utilization of recovered heat. It includes: a heat recovery acquisition unit (11) that obtains the heat energy that can be recovered and utilized from the heat energy discharged from various machines / equipment; a basic design information acquisition unit (12) that obtains the basic design information of the agricultural greenhouse; a greenhouse heat dissipation coefficient calculation unit (13) that calculates the greenhouse heat dissipation coefficient of the agricultural greenhouse; and a theoretical value calculation unit (14) that calculates the theoretical value of the floor area of ​​the agricultural greenhouse that can ensure the heating capacity to maintain a set nighttime temperature suitable for plants, taking into account the heat energy of the recovered heat.

Description

Technical Field

[0001] The present invention relates to a technology for assisting the design of an agricultural greenhouse, and in particular, to a technology for assisting the design of an agricultural greenhouse by utilizing heat energy exhausted from various machines and equipment. Background Art

[0002] Global warming countermeasures are being studied in various ways as an urgent issue. In particular, the reduction of greenhouse gases such as carbon dioxide from power plants, substations, factories, and waste treatment plants that emit greenhouse gases is expected to have a significant effect in global warming countermeasures.

[0003] Patent document 1 discloses a technology that, instead of releasing hot exhaust gas containing a large amount of carbon dioxide from a thermal power plant into the atmosphere, heat exchange is performed using seawater to lower the temperature to a given level, and the hot exhaust gas containing carbon dioxide is supplied to a plant factory, thereby suppressing the release of greenhouse gases into the atmosphere.

[0004] Non-patent document 1 discloses, as one of the global warming prevention technologies, a technology in which heat generated by combustion of gas or the like is supplied to an agricultural greenhouse for heating, and carbon dioxide is extracted from exhaust gas and supplied to promote plant growth.

[0005] Prior Art Literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 3-236723

[0008] Non-patent literature

[0009] Non-patent literature 1: ENERGY FRONTLINE, April 13, 2021, Vol. 25, "Tomatoes thrive thanks to CO2! What is the latest technology that kills three birds with one stone?" URL: https: / / ene-fro.com / article / ef195_a1 / Summary of the invention

[0010] Problems to be solved by the invention

[0011] The technology disclosed in Patent Document 1 and Non-Patent Document 1 is basically a technology for suppressing the emission of greenhouse gases into the atmosphere by recovering carbon dioxide and heat discharged from energy-discharging equipment and utilizing them for other purposes. Among them, the thermal energy of waste heat is mostly heat from fossil fuels, and by promoting its utilization, the use of fossil fuels can be reduced, which contributes to energy conservation and reduction of greenhouse gas emissions.

[0012] However, in the above-mentioned conventional technologies, although there are ideas related to utilizing the thermal energy of waste heat itself, there has been no sufficient research on utilizing the thermal energy more efficiently in agricultural greenhouses.

[0013] In fact, the current situation is that the waste heat from factories, etc., is supplied to existing agricultural greenhouses for utilization, and is only evaluated as contributing to energy conservation and greenhouse gas reduction. Even if an agricultural greenhouse is built for the purpose of utilizing waste heat from factories, etc., it is currently impossible to build the agricultural greenhouse on a scale commensurate with the thermal energy of the waste heat that can be efficiently utilized, and agricultural greenhouses of a predetermined size are simply built. Therefore, as long as the scale of the agricultural greenhouse can be set to a scale commensurate with the thermal energy that can be recovered and utilized, the cost, labor, etc. associated with the construction of the agricultural greenhouse will be more reasonable. As a result, the construction of agricultural greenhouses that can utilize waste heat is promoted, and the effect of suppressing greenhouse gas emissions is also increased.

[0014] The present invention is proposed in view of the above, and the subject is to provide an agricultural greenhouse design assistance device, a computer program and a recording medium, which can recover the heat energy discharged from various machines / equipment, build an agricultural greenhouse of a scale commensurate with the effective use of the recovered heat, suppress the waste of construction costs, etc., promote the construction of agricultural greenhouses, and contribute to the reduction of greenhouse gases.

[0015] Means for solving problems

[0016] In order to solve the above-mentioned problems, the agricultural greenhouse design assistance device of the present invention assists the design of an agricultural greenhouse scheduled to be set up in a given area, and comprises: a recovered heat acquisition unit, which obtains the amount of recovered heat that can be recovered and utilized from the heat energy discharged from various machines / equipment; a basic design information acquisition unit, which obtains the basic design information of the agricultural greenhouse; a greenhouse heat dissipation coefficient calculation unit, which obtains the greenhouse heat dissipation coefficient of the agricultural greenhouse for cultivating a given plant for a given cultivation period in the agricultural greenhouse having the basic design information; and a floor area theoretical value calculation unit, which calculates the theoretical value of the floor area of ​​the agricultural greenhouse that can ensure the heating capacity to maintain the set night temperature suitable for the plant, taking into account the greenhouse heat dissipation coefficient for the amount of recovered heat.

[0017] Preferably, as the greenhouse heat dissipation coefficient, at least one of a horizontal heat dissipation coefficient and a vertical heat dissipation coefficient of the agricultural greenhouse is used.

[0018] Preferably, the greenhouse heat dissipation coefficient calculation unit has: an indoor and outdoor temperature difference calculation unit, which, when it is set to cultivate the plants during the cultivation period, calculates the indoor and outdoor temperature difference between the set night temperature and the estimated regional minimum temperature of the region during the cultivation period, and calculates the horizontal heat dissipation coefficient and the vertical heat dissipation coefficient by considering the indoor and outdoor temperature difference.

[0019] Preferably, the greenhouse heat dissipation coefficient calculation unit includes: a soil heat flux calculation unit that calculates the soil heat flux of the region during the cultivation period and calculates the vertical heat dissipation coefficient based on the soil heat flux.

[0020] Preferably, the floor space theoretical value calculation unit calculates the theoretical value of the floor space assuming a square floor space shape.

[0021] Preferably, there is a coverage area theoretical value calculation unit, which calculates the theoretical value of the coverage area of ​​the agricultural greenhouse that can utilize the recovered heat with the desired efficiency, based on the theoretical value of the floor area, the indoor and outdoor temperature difference, the soil heat flux and the basic design information.

[0022] Preferably, there is provided a floor area design value calculation unit for obtaining design values ​​of the full width and depth of the agricultural greenhouse so that the design value of the floor area of ​​the agricultural greenhouse becomes equal to or less than a theoretical value of the floor area.

[0023] Preferably, it comprises: a floor area design value calculation unit, which obtains the design values ​​of the full width and the depth of the agricultural greenhouse so that the design value of the floor area of ​​the agricultural greenhouse is lower than the theoretical value of the floor area; and a covered area design value calculation unit, which obtains the design value of the covered area of ​​the agricultural greenhouse below the theoretical value of the covered area based on the design value of the floor area obtained by the floor area design value calculation unit, the full width and the depth, and the basic design information obtained by the basic design information acquisition unit.

[0024] Preferably, it is provided with: a required heat calculation unit, which calculates the required heat for ensuring the set night temperature in the agricultural greenhouse, the required heat calculation unit is a unit that calculates the heating load during the given cultivation period using the daily night heating load obtained by considering the design value of the floor area and the design value of the covered area for the daily maximum temperature and the daily minimum temperature obtained from the public meteorological data of the setting area of ​​the agricultural greenhouse as the required heat.

[0025] Preferably, the period heating load is obtained by adding the daily daytime heating load to the daily nighttime heating load.

[0026] Preferably, there is a unit for calculating the greenhouse gas emissions from heating, which calculates the greenhouse gas emissions when the required heat is ensured by the operation of the heating equipment, compares it with the greenhouse gas emissions when the required heat is ensured by the recovered heat, and calculates the difference between the two as the greenhouse gas reduction amount when the recovered heat is used.

[0027] Preferably, when the required heat is entirely ensured by the recovered heat, fuel consumption=0 and greenhouse gas emission=0.

[0028] Preferably, there is provided a cost calculation unit for respectively calculating the cost required to ensure the required amount of heat by operating the heating device and the cost required to ensure the required amount of heat by the recovered heat, and calculating the energy reduction cost based on the difference between the two.

[0029] In addition, in the present invention, a computer program is provided to enable a computer to function as an agricultural greenhouse design assistance device that assists in the design of an agricultural greenhouse set up in a given area, and the computer program enables the computer to perform the following steps: obtaining heat that can be recovered and utilized from the heat energy discharged from various machines / equipment; obtaining basic design information of the agricultural greenhouse; obtaining the greenhouse heat dissipation coefficient of the agricultural greenhouse for cultivating a given plant for a given cultivation period in the agricultural greenhouse having the basic design information; and for the heat of the recovered heat, calculating a theoretical value of the floor area of ​​the agricultural greenhouse that can ensure the heating capacity to maintain a set night temperature suitable for the plant, taking into account the greenhouse heat dissipation coefficient.

[0030] Preferably, as the greenhouse heat dissipation coefficient, at least one of a horizontal heat dissipation coefficient and a vertical heat dissipation coefficient of the agricultural greenhouse is used. Preferably, in the step of calculating the greenhouse heat dissipation coefficient, when the plant is cultivated during the cultivation period, the difference between the inside and outside air temperature between the set night temperature and the regional minimum air temperature of the region estimated during the cultivation period is obtained, and the horizontal heat dissipation coefficient and the vertical heat dissipation coefficient are obtained in consideration of the difference between the inside and outside air temperature.

[0031] Preferably, in the step of calculating the greenhouse heat dissipation coefficient, the soil heat flux of the region during the cultivation period is calculated, and the vertical heat dissipation coefficient is calculated based on the soil heat flux.

[0032] Preferably, a theoretical value of the coverage area of ​​the agricultural greenhouse that can utilize the recovered heat at a desired efficiency is calculated based on the theoretical value of the floor area, the indoor and outdoor air temperature difference, the soil heat flux, and the basic design information.

[0033] Preferably, the design values ​​of the full width and depth of the agricultural greenhouse are obtained so that the design value of the floor area of ​​the agricultural greenhouse becomes equal to or less than the theoretical value of the floor area.

[0034] Preferably, the design values ​​of the full width and depth of the agricultural greenhouse are obtained so that the design value of the floor area of ​​the agricultural greenhouse is below the theoretical value of the floor area, and the design value is obtained below the theoretical value of the covered area based on the design value of the floor area, the full width and the depth, and the basic design information.

[0035] Preferably, further, for the daily maximum temperature and the daily minimum temperature obtained from the public meteorological data of the area where the agricultural greenhouse is set up, the heating load for the given cultivation period is calculated using the daily nighttime heating load obtained by taking into account the design value of the floor area and the design value of the covered area, as the required heat for ensuring the set night temperature in the agricultural greenhouse.

[0036] Preferably, the period heating load is obtained by adding the daily daytime heating load to the daily nighttime heating load.

[0037] Preferably, further, the emission of greenhouse gases from heating is calculated, that is, the emission of greenhouse gases when the required heat is ensured by the operation of the heating equipment is obtained, and compared with the emission of greenhouse gases when the required heat is ensured by the recovered heat, and the difference between the two is obtained as the greenhouse gas reduction amount when the recovered heat is used.

[0038] Preferably, the cost required to ensure the required amount of heat by operating the heating system and the cost required to ensure the required amount of heat by the recovered heat are respectively obtained, and a configuration is provided for obtaining energy cost reduction based on the difference between the two.

[0039] In addition, the present invention provides a computer-readable recording medium having the computer program recorded thereon. The recording medium storing the computer program may be a non-transitory recording medium. The non-transitory recording medium is not particularly limited, and examples thereof include recording media such as a floppy disk, a hard disk, a CD-ROM, an MO (magnetic optical disk), a DVD-ROM, and a memory card.

[0040] Effects of the Invention

[0041] According to the present invention, the heat of recovered heat that can be recovered is obtained from the heat energy discharged from various machines / equipment, and an agricultural greenhouse of a scale that can ensure the required heating capacity through the supply of recovered heat can be built based on the floor area obtained by considering the heat dissipation coefficient of each heat flow in the horizontal direction and the vertical direction of the agricultural greenhouse. Therefore, the agricultural greenhouse built based on the results obtained by the agricultural greenhouse design auxiliary device of the present invention can efficiently utilize the recovered heat, seek energy saving, and contribute to the reduction of greenhouse gas. In addition, the waste of cost, labor, etc. associated with the construction of agricultural greenhouses can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 This is a block diagram showing a schematic configuration of an agricultural greenhouse design support device according to one embodiment of the present invention.

[0043] Figure 2 It is a diagram for explaining the function of the recovered heat acquisition unit.

[0044] Figure 3 The diagram shows an example of an input screen and an output screen displayed on a display.

[0045] Figure 4 This is a diagram for explaining the structure and function of the greenhouse heat dissipation coefficient calculation unit.

[0046] Figure 5 This is a diagram for explaining the structure and function of the floor space theoretical value calculation unit.

[0047] Figure 6 It is a diagram for explaining the structure and function of the coverage area theoretical value calculation unit.

[0048] Figure 7 It is a diagram for explaining a calculation process of a design value of a floor space in a design value calculation unit of a floor space.

[0049] Figure 8 It is a diagram for explaining the calculation process of the design value of the coverage area in the coverage area design value calculation unit.

[0050] Fig. 9 This is a block diagram showing a schematic configuration of an agricultural greenhouse design support device according to another embodiment of the present invention.

[0051] Fig.10 This is a diagram for explaining a calculation process of the period heating load in the required heat calculation unit.

[0052] Fig.11 This is a diagram for explaining the calculation process of nighttime degree hours.

[0053] Fig.12This is a diagram for explaining a calculation process when the daytime heating load of each day is included in the period heating load.

[0054] Fig.13 This is a diagram for explaining a process of calculating the greenhouse gas emission amount in a heating greenhouse gas emission amount calculation unit. DETAILED DESCRIPTION

[0055] Hereinafter, the present invention will be described in further detail based on the embodiments shown in the drawings. Figure 1 This is a diagram showing a schematic structure of an agricultural greenhouse design support device 1 according to the present embodiment. As shown in the diagram, the agricultural greenhouse design support device 1 according to the present embodiment is composed of a computer (the type of computer is not limited, and includes personal computers, microcomputers, portable information terminals, etc.) having a processor (CPU) 1a, a storage unit (when referred to as a "storage unit" in this specification, it means a main storage device, a storage device, a volatile or non-volatile recording medium, and is not limited to any one of them) 1b.

[0056] Specifically, in the agricultural greenhouse design assisting device 1 of the present embodiment, a computer program is stored in the storage unit 1b, which enables the agricultural greenhouse design assisting device 1, i.e., the computer, to execute the steps of the functioning of the heat recovery acquisition unit 11, the basic design information acquisition unit 12, the greenhouse heat dissipation coefficient calculation unit 13, the floor area theoretical value calculation unit 14, the covered area theoretical value calculation unit 15, the floor area design value calculation unit 16, and the covered area design value calculation unit 17. The computer program is usually stored in a non-volatile recording medium such as a hard disk or SSD built into or external to the computer (agricultural greenhouse design assisting device 1), and is read out and executed by the above-mentioned processor 1a. In addition, the storage place of various data may be a storage unit connected via a communication line in addition to the storage unit built into or external to the agricultural greenhouse design assisting device 1.

[0057] like Figure 2As shown, the heat recovery acquisition unit 11 obtains the amount of heat that can be recovered and utilized from the heat energy discharged from various machines / equipment. The so-called various machines / equipment are not particularly limited as long as they discharge heat energy. For example, it can be a relatively small machine such as a boiler, a heating device, a carbon dioxide generating device, etc. attached to an agricultural greenhouse, or any of large equipment, complete sets of equipment, etc. such as a power plant, a factory, and a garbage disposal plant. Among them, since the farther away from the setting site of the agricultural greenhouse, the more it costs to transport the heat energy, it is preferred that the machine and equipment be located in a place close to the setting site of the agricultural greenhouse. For example, in the case of a piping system for recovering the exhaust gas of a garbage disposal plant, the heat recovery acquisition unit 11 obtains the amount of heat that can be recovered from the exhaust gas obtained through the piping system. The amount of heat recovered can also be obtained by actually measuring the amount of heat that can be recovered, but an appropriate value envisioned can also be used for simulation. Figure 3 An example of a display screen of a display as an output device is shown. On the left side of the figure, various input information is displayed in a box represented by a blank space. When the heat amount of recovered heat is input using the input device, or when the information is received from a device for obtaining the heat amount of recovered heat (not shown), the recovered heat acquisition unit 11 outputs the information to the recovered heat acquisition unit 11. Figure 3 In the example, the heat is displayed in a box labeled "residual heat". In addition, when the residual heat is input in the unit of kcal / h, the recovered heat acquisition unit 11 also has a function of converting it into the unit of GJ / h. The recovered heat acquisition unit 11 also stores the input recovered heat (residual heat) in the basic design information database 31.

[0058] The basic design information acquisition unit 12 acquires basic design information required for the design of the agricultural greenhouse. The so-called basic design information, in this embodiment, is: information related to the structure of the agricultural greenhouse, such as the roof shape (e.g., triangular shape, semicircular shape, etc., or the slope when the triangular shape is selected), the type of roof material (e.g., FRA, etc.), the front width, the eaves height (the height from the installation surface excluding the sagittal section of the roof), the span length in the depth direction, the aspect ratio (full width / depth), the type of lining covering material (e.g., Luxuos (trade name), Tempa (trade name), etc.); and information related to cultivation, such as the type of plant, the start date and end date of cultivation. In addition, the agricultural greenhouse designed in this embodiment is based on a multi-span structure. In the following description, "front width" means the front width of one building, and "full width" means the width of the entire agricultural greenhouse with a multi-span structure. Regarding the basic design information, when the simulation executor of the device, such as the person who plans to build the agricultural greenhouse or the person who is related to the factory that discharges the exhaust gas, inputs it using the input device, the input content is reflected in the basic design information acquisition unit 12. Figure 3The given input items shown. It can be set as follows: when it is desired to limit the range of the roof shape, the type of roof material, the span length in the depth direction, etc. that can be adopted as an agricultural greenhouse, a pull-down menu is displayed for selection. The front width, eaves height, aspect ratio, etc. can be set as a structure for inputting numerical values. Of course, the input method is arbitrary and is not limited to this. The aspect ratio is appropriately determined in consideration of the shape and area of ​​the land where the agricultural greenhouse is to be set up.

[0059] The basic design information acquisition unit 12 further stores the input basic design information in the basic design information database 31 .

[0060] The greenhouse heat dissipation coefficient calculation unit 13 reads the basic design information obtained by the basic design information acquisition unit 12, and obtains the greenhouse heat dissipation coefficient of the agricultural greenhouse for the given plant cultivation for a given cultivation period. The greenhouse heat dissipation coefficient includes: the coefficient of heat exchange from the gable surface, the tangent portion, and the side wall (in this specification, these are coefficients related to the heat flow in the horizontal direction, so they are called "horizontal heat dissipation coefficients"); and the coefficient of heat exchange on the ground and the heat exchange at the top surface (in this specification, these are coefficients related to the heat flow in the vertical direction, so they are called "vertical heat dissipation coefficients"). In this embodiment, as the greenhouse heat dissipation coefficient, both the horizontal heat dissipation coefficient and the vertical heat dissipation coefficient are considered. When only one side is considered, the greenhouse heat dissipation coefficient as a whole for the agricultural greenhouse is not sufficient, which will affect the reliability of the calculated values ​​of the floor area and the covered area. Therefore, it is preferred to consider both sides.

[0061] The greenhouse heat dissipation coefficient calculation unit 13 includes an inside-outside temperature difference calculation unit 131 and a soil heat flux calculation unit 132. When a given plant is to be cultivated in a given cultivation period, the inside-outside temperature difference calculation unit 131 obtains the inside-outside temperature difference between the set night temperature in the agricultural greenhouse and the regional minimum temperature of the region where the agricultural greenhouse is to be installed, which is estimated during the given cultivation period.

[0062] The night temperature setting is determined according to the type of plant. A value equivalent to the average value during the cultivation period is preferably determined in consideration of the location and season of the agricultural greenhouse. The night temperature setting can also be set in Figure 3 The input screen shown is set by manual input, and is preferably configured as follows: the agricultural greenhouse design support device 1 has a plant species distinction information database 32 that stores appropriate night temperatures (average values) according to plant species. When the type of plant to be cultivated is selected on the input screen, the internal and external temperature difference calculation unit 131 accesses the plant species distinction information database 32, reads out and sets the night temperature (average value) corresponding to the plant (refer to Figure 4 ).

[0063] The lowest regional temperature is obtained from public meteorological data obtained from the regional meteorological observation system (AMeDAS) of the region. The lowest regional temperature varies according to the scheduled cultivation period, and the lowest temperature during the cultivation period is adopted. In addition, the set night temperature of the plant is a temperature equivalent to the average value during the cultivation period as described above, but since the temperature outside the agricultural greenhouse decreases after sunset and becomes the lowest temperature before sunrise, it is preferably controlled so that the heating capacity is maximized until dawn. In this case, as a result, the night temperature in the agricultural greenhouse is controlled to be higher than the average value until sunrise. When it is set as the highest night temperature, the highest night temperature is preferably determined by the type of plant based on empirical values, for example, in the case of tomatoes, a temperature several degrees higher than the set night temperature as the average value is adopted. The highest night temperature, or the difference between the highest night temperature and the set night temperature (average value) is stored in the plant species distinction information database 32 together with the set night temperature (average value), and it is read out as long as the type of plant is selected.

[0064] In this embodiment, the difference between the indoor and outdoor temperature is the difference between the highest night temperature and the lowest temperature in the region. Therefore, the difference between the set night temperature (average value) and the highest night temperature is added to the set night temperature (average value), and the difference with the lowest temperature in the region is calculated to calculate the difference between the indoor and outdoor temperature. For example, when the set night temperature (average value) is 15.5°C, the difference between the set night temperature (average value) and the highest night temperature is 2°C, and the lowest temperature in the region is -11°C, the difference between the indoor and outdoor temperature is 28.5°C.

[0065] The soil heat flux calculation unit 132 calculates the soil heat transfer amount per unit area by multiplying the soil heat transfer coefficient determined in consideration of the region by the above-mentioned difference in internal and external temperatures. The soil heat transfer coefficient is a value assigned to each location based on public meteorological data to distinguish between warm and cold places. In the present embodiment, when the number of days with a daily minimum temperature below 0°C is less than 112 days / year, it is set as a warm place and assigned "-36". When the number of days with a daily minimum temperature below 0°C is more than 112 days, it is set as a cold place and assigned "-31". The soil heat transfer coefficient is associated with the region and stored in the regional information database 33. The soil heat flux calculation unit 132 reads the soil heat transfer coefficient from the regional information database 33 to calculate the soil heat transfer amount (refer to Figure 4 ).

[0066] The greenhouse heat dissipation coefficient calculation unit 13 uses the above data to calculate the horizontal heat dissipation coefficient. Figure 4As shown in FIG. 4 , the basic design information database 31 is accessed to read out the type of roof material, the type of lining covering material, the type of roof shape, the front width, the eaves height, and the aspect ratio among the basic design information acquired by the basic design information acquisition unit 12 ( S401 ). In the basic design information database 31 , the average heat dissipation coefficient is associated with the type of roof material and the type of lining covering material.

[0067] In addition, for the various types of films (roofing materials, lining covering materials (curtains)) during the experimental period, the heating load coefficient for one night was obtained by dividing the heating heat of one night by the night hours and the covering area of ​​the same night, and these values ​​were averaged according to the type of film (roofing materials, lining covering materials (curtains)). The value thus obtained is the "average heat dissipation coefficient". In this embodiment, from November 9, 1980 to February 3, 1981, three greenhouses A to C (surface area: 262m 2 、Occupancy area: 120m 2 , outer film: agricultural vinyl film, heating method: hot air heater, curtain form: A greenhouse...one layer of agricultural vinyl film, B, C greenhouses...two axes and two layers, curtain position (lower layer): A, B greenhouses...1.8m (above ground), C greenhouse...1.85m (above ground), inter-layer distance in the case of two layers: 20cm) 4 cultivation beds were set up for the experiment, and the value obtained through the experiment was adopted. The experiment only covered each cultivation bed with black ground film, and wild mustard, lettuce, green peas, and lentils were planted in each cultivation bed. The average value of the heating load coefficient in each greenhouse was obtained according to the type of film. When the heating load coefficient of greenhouse A was set to 100%, the heating load coefficient of greenhouses B and C was calculated according to the combination of various films, and the value was set as the "average heat dissipation coefficient".

[0068] In this embodiment, the average heat dissipation coefficient used in calculating the horizontal heat dissipation coefficient and the vertical heat dissipation coefficient is the average heat dissipation coefficient of the lining covering material when the lining covering material is selected, and is the average heat dissipation coefficient of the roofing material when the lining covering material is not selected.

[0069] However, if an average heat dissipation coefficient that considers not only the average heat dissipation coefficient of the components constituting the top surface, such as the lining covering material and the roofing material, but also the average heat dissipation coefficient that considers the heat transfer index of the side surface is used, it can be expected that the calculation accuracy will be improved, so it is preferred. When the heat transfer index of the top surface and the side surface is considered, the average heat dissipation coefficient is calculated by the following formula. In addition, the average heat dissipation coefficient of the side surface is the average heat dissipation coefficient of the covering material constituting the side surface.

[0070] Average heat dissipation coefficient = (average heat dissipation coefficient of the top surface × surface area of ​​the top surface + average heat dissipation coefficient of the side surface × surface area of ​​the side surface) / (surface area of ​​the top surface + surface area of ​​the side surface)

[0071] In addition, regarding the roof shape, since the surface area varies depending on the roof shape, the heat dissipation coefficient (roof shape coefficient) corresponding to this is associated. In the present embodiment, the roof is divided into the top portion and the tangent portion to set the roof shape coefficient. When calculating the horizontal heat dissipation coefficient, the roof shape coefficient 2 of the tangent portion is used, and when calculating the vertical heat dissipation coefficient described later, the roof shape coefficient 1 of the top portion is used. The roof shape coefficient is a ratio to the floor area. The former adopts a value less than 1 or a value greater than 1 (but in most cases, a value less than 1) (roof shape coefficient 2), and the latter adopts a value greater than 1 (roof shape coefficient 1). The greenhouse heat dissipation coefficient calculation unit 13 reads the values ​​of these basic design information and the associated coefficients (S401), and uses the internal and external air temperature difference (S402) obtained by the internal and external air temperature difference calculation unit 131 to calculate the horizontal heat dissipation coefficient (S403). In the present embodiment, the horizontal heat dissipation coefficient is calculated by the secondary formula.

[0072] Horizontal heat dissipation coefficient = (average heat dissipation coefficient × temperature difference between inside and outside × roof shape coefficient 2 × (front width) 2 × square root of aspect ratio / front width) + (2×average heat dissipation coefficient×difference between inside and outside air temperature×eave height / square root of aspect ratio)

[0073] The greenhouse heat dissipation coefficient calculation unit 13 also uses the above data to calculate the vertical heat dissipation coefficient. Specifically, the vertical heat dissipation coefficient (S405) is calculated using the information that affects the heat in the vertical direction among the above data, that is, the soil heat flux obtained by the soil heat flux calculation unit 132 (S404), the average heat dissipation coefficient of the lining covering material among the basic design information, the roof shape coefficient 1 associated with the roof shape (S401), and the indoor and outdoor temperature difference (S402) obtained by the indoor and outdoor temperature difference calculation unit 131. In this embodiment, the vertical heat dissipation coefficient is calculated by the formula.

[0074] Vertical heat dissipation coefficient = soil heat flux + average heat dissipation coefficient × indoor and outdoor temperature difference × roof shape coefficient 1

[0075] The floor area theoretical value calculation unit 14 calculates the theoretical value of the floor area of ​​the agricultural greenhouse that can ensure the heating capacity to maintain the set night temperature suitable for the plants to be cultivated, based on the heat of the recovered heat obtained by the recovered heat acquisition unit 11, the greenhouse heat dissipation coefficient obtained by the greenhouse heat dissipation coefficient calculation unit 13, and in this embodiment, the horizontal heat dissipation coefficient and the vertical heat dissipation coefficient. When calculating the theoretical value of the floor area, in order to simplify the calculation of the area and reduce the calculation load of the agricultural greenhouse design support device 1, it is preferably set to calculate the floor area shape as a square.

[0076] In addition, regarding the amount of heat recovered, although it is possible to utilize 100% of the heat obtained by the recovered heat acquisition unit 11, it is preferable to use the amount of heat that can actually be utilized in consideration of losses during transportation. Therefore, it is preferable to use the above-mentioned basic design information of the agricultural greenhouse, the types of plants, etc., such as Figure 3 When the heat of the recovered heat is used, the floor space theoretical value calculation unit 14 multiplies the heat (waste heat) obtained by the recovered heat acquisition unit 11 by the input heat utilization efficiency (e.g., 90%, 80%, etc.) to calculate the theoretical value of the floor space. Figure 5 As shown, the floor space theoretical value calculation unit 14 uses the value obtained by multiplying the heat value of the recovered heat by the heat utilization efficiency (S501), the horizontal heat dissipation coefficient (S403) and the vertical heat dissipation coefficient (S405), and first calculates the geometric mean value of the floor space by the secondary formula (S502).

[0077] Geometric mean = (- horizontal heat dissipation coefficient + ((horizontal heat dissipation coefficient) 2 -square root of (4×vertical heat dissipation coefficient×heat recovery×heat utilization efficiency) / (2×vertical heat dissipation coefficient)

[0078] Next, the geometric mean is squared to calculate the theoretical value of the floor area ( S503 ).

[0079] The covering area theoretical value calculation unit 15 calculates the total area covered by the covering material, which is the side surface, gable surface, ceiling surface forming the roof, and sagittal surface of the agricultural greenhouse, as the covering area. This covering area is also the area that can utilize the heat of the recovered heat at the desired heat utilization efficiency, similarly to the land area. In this embodiment, Figure 6As shown in FIG. 1 , the heat amount of recovered heat, the heat utilization efficiency, and the average heat dissipation coefficient of the lining covering material among the basic design information are used (S601, and the internal and external air temperature difference calculated by the internal and external air temperature difference calculation unit 131 (S402), the soil heat flux calculated by the soil heat flux calculation unit 132 (S404), and the theoretical value of the floor area calculated by the floor area theoretical value calculation unit 14 (S503), and the theoretical value of the covering area is calculated by the secondary formula (S602).

[0080] Theoretical value of the covered area = (heat recovery × heat utilization efficiency - soil heat flux × theoretical value of the area) / (average heat dissipation coefficient × difference in internal and external temperature)

[0081] The floor area design value calculation unit 16 obtains the design values ​​of the full width and depth of the agricultural greenhouse so that the design value of the floor area becomes less than the theoretical value of the floor area obtained by the floor area theoretical value calculation unit 14. Figure 7 As shown, the number of buildings is obtained (S702) by referring to the information of the frontage and aspect ratio stored in the basic design information database 31 (S701) and the geometric mean value (S502) of the floor area obtained in the floor area theoretical value calculation unit 14. As described above, the frontage is the frontage of each building, so the number of buildings is obtained based on the aspect ratio.

[0082] For the number of buildings, the number of spans is determined (S704) with reference to the span length and front width (S703) stored in the basic design information database 31 and the floor area (S503) obtained in the floor area theoretical value calculation unit 14. The number of spans is an integer value less than the value obtained by dividing the theoretical value of the floor area by the number of buildings, the front width, and the span length. The designed full width is determined based on the front width and the number of buildings, and the designed depth is determined based on the span length and the number of spans (S705). In addition, the design value of the floor area is determined based on the full width and the depth (S706). As described above, the number of spans is an integer value less than the value obtained by dividing the theoretical value of the floor area by the full width (number of buildings × front width) and the span length, so the design value of the floor area becomes less than the theoretical value of the floor area obtained in the floor area theoretical value calculation unit 14.

[0083] The design value calculation unit 17 for the coating area obtains a design value for the coating area so that the design value for the coating area is equal to or less than the theoretical value for the coating area obtained by the theoretical value calculation unit 15 for the coating area. Figure 8As shown, the design value of the floor area calculated by the design value calculation unit 16 for the floor area (S706), the full width and depth (S705), the number of buildings (S702), the eaves height, the front width, and the roof shape (roof shape coefficients 1 and 2) (S801) stored in the basic design information database 31 are used to obtain the coverage area of ​​the two gable surfaces (excluding the sagittal section included in the roof) and the two side surfaces (S802), and the coverage area of ​​the roof is added thereto. For the top surface, the coverage area of ​​the roof is obtained by multiplying the design value of the floor area by the roof shape coefficient 1 of the top surface (S803), and for the sagittal section, the coverage area of ​​the roof is obtained by multiplying the square of the front width by the number of buildings and the roof shape coefficient 2 of the sagittal section (S804). Then, if the respective covered areas obtained in S802, S803, and S804 are added together, the design value of the covered area is obtained (S805). Since the design value of the floor area obtained by the floor area design value calculation unit 16 and the total width (number of buildings × front width) are used, the design value of the covered area obtained by the covered area design value calculation unit 17 becomes less than the theoretical value of the covered area obtained by the covered area theoretical value calculation unit 16.

[0084] Next, an example of a design simulation of an agricultural greenhouse using the agricultural greenhouse design support device 1 according to the present embodiment will be described.

[0085] Simulation executor etc. Figure 3 The required items are entered on the input screen shown. The input items include the heat of recovered heat (waste heat) (e.g. 15000 kcal / h), heat utilization efficiency (e.g. 0.9), roof shape (triangular roof: roof shape coefficient 1 = 1.096, roof shape coefficient 2 = 0.45), type of roof material, type of lining covering material (Luxous + Tempa: average heat dissipation coefficient 1.9), front width (e.g. 8m), eaves height (e.g. 5m), span length in the depth direction (e.g. 5m), aspect ratio (full width / depth) (e.g. 1.5), plant type (e.g. tomato), cultivation start date, cultivation end date, and the place name where the agricultural greenhouse is scheduled to be installed (e.g. Sapporo).

[0086] The recovered heat acquisition unit 11 and the basic design information acquisition unit 12 store the input information in the basic design information database 31. The greenhouse heat dissipation coefficient calculation unit 13 obtains the average heat dissipation coefficient corresponding to the type of lining covering material = 1.9 kcal / m 2 h℃ and display it on Figure 3Input screen. In addition, corresponding to "tomato" entered as the type of plant, the set night temperature (average value) = 15.5°C is read from the plant type distinction information database 32, and further, the difference between the maximum night temperature and the set night temperature (average value) (set night temperature correction (maximum)) = 2°C is read. Corresponding to the place name "Sapporo", the regional minimum temperature is taken in from the public meteorological data of the Sapporo area. The regional minimum temperature is the regional minimum temperature during the cultivation period obtained based on the entered cultivation start date and cultivation end date (for example, -11°C). In addition, the soil heat transfer coefficient corresponding to the region (for example, -31kcal / m 2 h) Read from the regional information database 33.

[0087] The indoor and outdoor temperature difference calculation unit 131 uses the above-mentioned set night temperature (average value), set night temperature correction (maximum), and regional minimum temperature to output the indoor and outdoor temperature difference = 28.5°C. The soil heat flux calculation unit 132 uses the indoor and outdoor temperature difference (28.5°C) and the soil heat transfer coefficient (-31 kcal / m 2 h) to obtain soil heat flux = 27.71 kcal / m 2 h.

[0088] Next, the greenhouse heat dissipation coefficient calculation unit 13 uses these values ​​to obtain the horizontal heat dissipation coefficient and the vertical heat dissipation coefficient by the above formula (reference Figure 4 ), the floor area theoretical value calculation unit 14 uses the horizontal heat dissipation coefficient, the vertical heat dissipation coefficient, the heat of the recovered heat (waste heat) and the heat utilization efficiency to calculate the geometric mean of the floor area = 32.40m, the theoretical value of the floor area (theoretical floor area) = 1050.02m 2 (refer to Figure 5 ). The theoretical floor space is shown in Figure 3 The right half of the output screen. If the theoretical floor area is obtained, Figure 7 As shown, the floor area design value calculation unit 16 calculates the number of buildings by the formula of the geometric mean of the floor area (32.40m) × the square root of the aspect ratio (the square root of 1.5) / the front width (8m). Since the number of buildings is calculated as an integer, the output value is rounded off appropriately. In this example, the number of buildings is calculated as 5. Next, the square of the geometric mean of the floor area (32.40m) is used. 2 / Number of buildings (5) / Front width (8m) / Span length (5m) to calculate the number of spans. Since the number of spans is calculated as an integer, the number of spans is calculated by rounding off the decimal point to 5.

[0089] The floor area design value calculation unit 16 calculates the floor area design value (design floor area) = 1000m by front width (8m) × number of buildings (5) × span length (5m) × number of spans (5). 2 , so that it appears in Figure 3 Therefore, in the output screen, for the theoretical area: 1050m 2 The design area below this value is: 1000m 2 .

[0090] On the other hand, the coverage area theoretical value calculation unit 15 uses the residual heat = 15000 kcal / h, heat utilization efficiency = 0.9, soil heat flux = 27.71 kcal / hm 2 、Theoretical floor area = 1050.02m 2 , temperature difference between inside and outside = 28.5℃, average heat dissipation coefficient of lining coating material = 1.9kcal / m 2 The theoretical value of the coverage area (theoretical coverage area) = 1995.75m 2 (refer to Figure 6 In addition, the design value calculation unit 17 calculates the design floor area (1000m 2 ) × roof shape factor 1 (1.0965) + roof shape factor 2 (0.45) × square of front width (8m) 2 ) × number of buildings (5) + 2 × total width (40m) × eaves height (5m), to obtain the design value of the covered area (designed covered area) = 1890.58m 2 (refer to Figure 8 The theoretical coverage area and the designed coverage area are Figure 3 The output screen shown shows 1995.7m 2 、1890.5m 2 .

[0091] According to this embodiment, the following structure is used: the theoretical values ​​of the floor area and the covered area are calculated based on the heat of the recovered heat, and the specific design values ​​are obtained by using the relationship with the heat dissipation coefficient of the greenhouse. Therefore, it is possible to design an agricultural greenhouse of a scale that can more effectively utilize the heat of the recovered heat, and compared with the case where the same heating is supplied by heating equipment derived from fossil fuels, it is possible to expect a reduction in greenhouse gases.

[0092] Next, an embodiment of the agricultural greenhouse design support device 1 having the function of simulating the heat required for growing plants using the agricultural greenhouse designed by the above embodiment and simulating the greenhouse gas reduction effect when utilizing recovered heat will be described.

[0093] In this embodiment, if Fig. 9 As shown, in the storage unit 1b, there is stored a computer program for executing steps which, in addition to functioning as the above-mentioned recovered heat acquisition unit 11, basic design information acquisition unit 12, greenhouse heat dissipation coefficient calculation unit 13, floor area theoretical value calculation unit 14, covered area theoretical value calculation unit 15, floor area design value calculation unit 16 and covered area design value calculation unit 17, also function as a required heat calculation unit 21, a heating greenhouse gas emission calculation unit 22 and a cost calculation unit 23.

[0094] The required heat calculation unit 21 calculates the required heat for ensuring the set night temperature in the agricultural greenhouse. As described above, the designed night temperature is set according to the type of plant. Fig.10 As shown, the required heat calculation unit 21 obtains the daily maximum temperature and daily minimum temperature (S1001) obtained from the public meteorological data of the installation area of ​​the agricultural greenhouse, and considers the design value of the floor area (design floor area) (S706) obtained by the floor area design value calculation unit 16 and the design value of the cover area (design cover area) (S805) obtained by the cover area design value calculation unit 17 to obtain the daily nighttime heating load (S1005), and uses the daily nighttime heating load (S1005) to obtain the period heating load (S1007) during the cultivation period. The period heating load (S1007) becomes the required heat for ensuring the set night temperature during the cultivation period.

[0095] In order to obtain the daily nighttime heating load (S1005), the daily nighttime heat dissipation (S1003) and the daily soil heat transfer (S1004) are obtained. The daily nighttime heat dissipation (S1003) is obtained by "designed covering area (S806) × average heat dissipation coefficient (S1008) of lining covering material (roofing material if lining covering material is not selected) × daily nighttime hours (S1002)".

[0096] The so-called nighttime heating hours (S1002) of each day is the value obtained by integrating the difference between the above-mentioned set night temperature and the outside temperature. The nighttime heating hours use an approximate value. It is obtained by the geometric calculation method of heating hours when the highest temperature and the lowest temperature of each day in the region are connected by a straight line (refer to Agricultural Meteorology (J. Agr. Met.) 38 (1): 29-36, 1982, Makio Hayashi and Toyoki Kozai, "Comparison of various heating hour estimates and measured values ​​and proposal of heating hour line graph").

[0097] Specifically, Fig.11 As shown, it is determined whether "daily minimum temperature ≧ set night temperature" (S1101).

[0098] a) When the lowest temperature of each day is higher than the set night temperature (“Yes” in S1101 ):

[0099] It is obtained by “(14×set night temperature (average value)+(49×daily maximum temperature+119×daily minimum temperature) / 12)×0”. That is, in this case, since heating is not required, the nighttime degree hours (1) becomes 0 (S1102).

[0100] b) Next, it is determined whether “7 / 12×maximum temperature of each day+5 / 12×minimum temperature of each day>set night temperature (average value)” ( S1103 ).

[0101] b-1) When the temperature exceeds the set night temperature (“Yes” in S1103 ):

[0102] The nighttime hours (2) are obtained by “12×(set night temperature (average value)-daily minimum temperature)2 / (daily maximum temperature-daily minimum temperature)” (S1104).

[0103] b-2) When the temperature is lower than the set night temperature (“No” in S1103 ):

[0104] The nighttime hours (3) are obtained by “(14×set night temperature (average value)+(49×daily maximum temperature+119×daily minimum temperature) / 12)×1” (S1105).

[0105] In addition, the approximate value of the nighttime hours is generated by a machine learning model using the daily maximum temperature and the daily minimum temperature as explanatory variables and the nighttime hours as the target variable, which is more preferable in terms of accuracy.

[0106] Multiply the daily soil heat flux (S1009) by the design footprint (1000m in the example above). 2 ) (S706), multiply the result by 14 hours, which is equivalent to the night time from sunset to the next morning, to obtain the daily soil heat transfer ( Fig.10 The difference between the set night temperature (average value) and the daily average nighttime outside temperature is multiplied by a coefficient (S1010), and the soil heat transfer coefficient (-31 in the case of Sapporo) is added to the result (S1011) to obtain the daily soil heat flux (S1009). The daily maximum temperature and daily minimum temperature of the region (S1001) are used to obtain the daily average nighttime outside temperature by "(5×daily maximum temperature+19×daily minimum temperature) / 24".

[0107] By summing up the daily nighttime heat dissipation (S1003) and the daily soil heat transfer (S1004) obtained in this way, the daily nighttime heating load (S1005) is calculated. When the sum of the daily nighttime heat dissipation (S1003) and the daily soil heat transfer (S1004) is equal to or less than 0, the daily nighttime heating load is calculated as 0.

[0108] The nighttime heating load for each day corresponding to the number of days in the cultivation period is obtained (S1005), and these are summed up (S1006). This results in the period heating load (S1007). In addition, if the period is set to each month, the monthly period heating load is obtained, and if the amounts for 12 months are summed up, the annual period heating load can be obtained.

[0109] However, whenever the heating load during the period is obtained (S1007), if Fig.12 As shown, it is preferable to set the structure as follows: not only the nighttime heating load (S1005) of each day is added, but also the daytime heating load (S1201) of each day is added to obtain the daily period heating load (S1202), and the amount thereof is obtained for the number of days corresponding to the cultivation period and totaled. The daily daytime heating load (S1201) becomes a value that takes into account the effect of the amount of solar radiation. As the daily daytime heating load, although a fixed value can be simply adopted, it is preferable to refer to the public meteorological data, obtain "daytime indoor set temperature - external air temperature - indoor solar heat affected temperature" (S1203), and obtain the value (degree-hour) obtained by integrating only the positive part thereof. In this way, by using the daily daytime heating load (S1201), the calculation accuracy of the period heating load (S1007) becomes higher. The daily daytime heating load (degree-hours) ( S1201 ) is more preferably obtained by using a machine learning model generated using the daily maximum temperature, daily minimum temperature, and sunshine hours as explanatory variables because this can improve accuracy.

[0110] The heating greenhouse gas emission calculation unit 22 converts the period heating load ( S1007 ) obtained by the required heat calculation unit 21 , that is, the required heat for ensuring the set nighttime temperature during the cultivation period, into greenhouse gas emission.

[0111] At this time, if Fig.13As shown, the greenhouse gas emission calculation unit 22 from heating first calculates the greenhouse gas emission when the required heat is ensured by the operation of the heating equipment (S1301). The required heat, i.e., the period heating load (S1007), can correspond to the cultivation period, or can be calculated on a monthly or annual basis as described above. However, when the converted greenhouse gas emission (S1301) is compared with the required heat supplied by recovered heat, when the recovered heat is used, the heat multiplied by the heat utilization efficiency (e.g., 0.9) is used as described above. Therefore, when calculating the greenhouse gas emission when the required heat is ensured by the operation of the heating equipment, the value obtained by dividing the period heating load (S1007) obtained by the above by the heat utilization efficiency (e.g., 0.9) is used (S1302). For example, when the required heat quantity, that is, the heating load during the year, is obtained by the required heat quantity calculation unit 21, which is 1734.57 GJ (S1007), it is divided by the heat utilization efficiency, for example, = 0.9, to obtain 1927.30 GJ (S1302). This value is multiplied by the emission coefficient associated with the type of fossil fuel (S1303). The type of fossil fuel can be selected on the input screen, such as Figure 3 As shown in FIG. 1 , for example, when heavy oil A is selected, the emission coefficient of carbon dioxide is adopted = 0.0189. Therefore, in this example, 1927.30 GJ × 0.0189 × 44 / 12 = 133.56 t is obtained. Figure 3 The output screen shows that the greenhouse gas emissions when the heating equipment is running (without resource recycling) are 133.5t.

[0112] On the other hand, in the present embodiment, since recovered heat is utilized at a given heat utilization efficiency (e.g., 0.9) to simulate the design of an agricultural greenhouse capable of supplying the required heat, the fuel consumption in the case of ensuring the required heat by recovered heat is in principle 0, and greenhouse gas emissions become 0.

[0113] Therefore, the greenhouse gas reduction amount obtained by the heating-derived greenhouse gas emission amount calculation unit 22 is 133.5 tons in this example.

[0114] Furthermore, in consideration of the situation where the required amount of heat cannot be supplied by recovered heat, a calculation program can be added to calculate the amount of greenhouse gas emissions associated with the heat that is supplemented by the heating equipment to make up for the shortfall.

[0115] The cost calculation unit 23 obtains the cost required to ensure the required heat by operating the heating equipment and the cost required to ensure the required heat by recovering the heat, and obtains the energy cost reduction based on the difference between the two. First, regarding the cost required to ensure the required heat by operating the heating equipment, for example, in the case of heavy oil A, the unit price based on heat is set to 2000 yen. For example, the cost of supplying the above-mentioned 1734.57GJ is compared with the case of using recovered heat. Therefore, considering the heat utilization efficiency (for example, 0.9), it becomes ¥2000×1734.57GJ / 0.9, which becomes about 3854600 yen.

[0116] On the other hand, when the unit price of heat is set to ¥1100 / GJ, the factory transaction unit price of the recovered heat purchased by the agricultural greenhouse construction / operation side from the waste heat provider side becomes ¥1100×1734.57GJ / 0.9, which is about 2120030 yen. From the perspective of the waste heat provider, i.e., the factory, etc., this amount becomes a new turnover based on the waste heat that was previously only released into the atmosphere. Therefore, it is preferred that Figure 3 In the output screen, an item is set to display the amount as the total sales of the waste heat provider. Such a value can be grasped before the construction of the agricultural greenhouse, which will serve as an incentive for the waste heat provider to seek cooperation with the agricultural greenhouse.

[0117] The cost calculation unit 23 displays approximately 3854600 yen and approximately 2120030 yen on the Figure 3 The output screen shown (in addition, Figure 3 The correct calculated values ​​are shown in the table: "¥3854174", "¥2119796"). Then calculate the difference between the two. The difference is about 1734570 yen (in Figure 3 In the display, the correct calculated value is "1734379" (with an error associated with terminal number processing) which is the difference between the case where the required heat is supplied by heating and the case where the required heat is supplied by heat recovery.

[0118] In this embodiment, in an agricultural greenhouse for which the design values ​​of the floor area and the covered area are obtained, the required heat for the cultivation period of the desired plant cultivation can be obtained. In addition, the greenhouse gas emission calculation unit 22 from heating can calculate the reduction amount of greenhouse gas based on the difference between the situation of using fossil fuels and the situation of using recovered heat, and then the difference between the two can be grasped from the cost aspect by the cost calculation unit 23. Therefore, in this embodiment, an agricultural greenhouse of a scale that makes the most of the recovered heat can be designed, and the reduction amount of greenhouse gas and the reduction cost of the situation of using the agricultural greenhouse and using the recovered heat can be visualized, and the benefits of the construction / operation of an agricultural greenhouse using the recovered heat can be clarified. In addition, in factories that provide recovered heat, the effective use of waste heat and the benefits of this situation are clarified. As a result, both the construction / operation side of the agricultural greenhouse and the waste heat supply side have become incentives to promote the construction of agricultural greenhouses that can contribute to the reduction of greenhouse gases.

[0119] Explanation of symbols

[0120] 1. Auxiliary device for design of agricultural greenhouses

[0121] 11. Heat recovery acquisition unit

[0122] 12 Basic design information acquisition department

[0123] 13 Greenhouse heat dissipation coefficient calculation unit

[0124] 131 Internal and external temperature difference calculation unit

[0125] 132 Soil heat flux calculation unit

[0126] 14 Calculation of theoretical floor space

[0127] 15 Covering area theoretical value calculation section

[0128] 16 Calculation of floor space design value

[0129] 17 Covering area design value calculation section

[0130] 21 Required heat calculation unit

[0131] 22 Calculation of greenhouse gas emissions from heating

[0132] 23 Cost calculation unit 23

[0133] 31 Basic design information database

[0134] 32 Plant species distinction information database

[0135] 33 Regional information database.

Claims

1. An agricultural greenhouse design assisting device assists in the design of an agricultural greenhouse to be set up in a given area, the agricultural greenhouse design assisting device comprising: A recovered heat acquisition unit that obtains heat that can be recovered and utilized from the heat energy discharged from various machines / equipment; A basic design information acquisition unit that acquires basic design information of the agricultural greenhouse; a greenhouse heat dissipation coefficient calculation unit for obtaining the greenhouse heat dissipation coefficient of the agricultural greenhouse when a given plant is cultivated for a given cultivation period in the agricultural greenhouse having the basic design information; and A floor area theoretical value calculation unit calculates a theoretical value of the floor area of ​​the agricultural greenhouse that can ensure a heating capacity that maintains a set nighttime temperature suitable for the plants, taking into account the greenhouse heat dissipation coefficient for the amount of the recovered heat.

2. The agricultural greenhouse design auxiliary device according to claim 1, wherein: As the greenhouse heat dissipation coefficient, at least one of a horizontal heat dissipation coefficient and a vertical heat dissipation coefficient of the agricultural greenhouse is used.

3. The agricultural greenhouse design auxiliary device according to claim 2, wherein: The greenhouse heat dissipation coefficient calculation unit includes: an indoor-outdoor temperature difference calculation unit, which, when the plant is cultivated for the cultivation period, obtains the indoor-outdoor temperature difference between the set night temperature and the regional minimum temperature of the region estimated during the cultivation period, The horizontal heat dissipation coefficient and the vertical heat dissipation coefficient are obtained by taking into account the difference in temperature between the inside and outside.

4. The agricultural greenhouse design assisting device according to claim 3, wherein: The greenhouse heat dissipation coefficient calculation unit includes: a soil heat flux calculation unit that calculates the soil heat flux of the region during the cultivation period; The vertical heat dissipation coefficient is calculated based on the soil heat flux.

5. The agricultural greenhouse design assisting device according to claim 1, wherein: The floor area theoretical value calculation unit calculates the theoretical value of the floor area assuming a square floor area shape.

6. The agricultural greenhouse design assisting device according to claim 4, wherein: The agricultural greenhouse design assistance device comprises: a covered area theoretical value calculation unit, which calculates the theoretical value of the covered area of ​​the agricultural greenhouse that can utilize the recovered heat obtained by the recovered heat acquisition unit at the desired efficiency based on the theoretical value of the floor area, the indoor and outdoor temperature difference, the soil heat flux and the basic design information.

7. The agricultural greenhouse design assisting device according to claim 1, wherein: The agricultural greenhouse design support device includes a floor area design value calculation unit that obtains design values ​​of the full width and depth of the agricultural greenhouse so that the design value of the floor area of ​​the agricultural greenhouse is less than a theoretical value of the floor area.

8. The agricultural greenhouse design assisting device according to claim 6, wherein: The agricultural greenhouse design auxiliary device comprises: a floor area design value calculation unit for obtaining design values ​​of the full width and depth of the agricultural greenhouse so that the design value of the floor area of ​​the agricultural greenhouse becomes less than a theoretical value of the floor area; and A covered area design value calculation unit calculates the design value of the covered area of ​​the agricultural greenhouse below the theoretical value of the covered area based on the design value of the covered area obtained by the covered area design value calculation unit, the full width and the depth, and the basic design information obtained by the basic design information acquisition unit.

9. The agricultural greenhouse design auxiliary device according to claim 8, wherein: The agricultural greenhouse design support device comprises: a required heat calculation unit that calculates the required heat for ensuring a set night temperature in the agricultural greenhouse; The required heat calculation unit is a unit that calculates the heating load for the given cultivation period as the required heat, based on the daily maximum temperature and the daily minimum temperature obtained from the public meteorological data of the area where the agricultural greenhouse is set up, and the daily nighttime heating load obtained by taking into account the design value of the floor area and the design value of the covered area.

10. The agricultural greenhouse design assisting device according to claim 9, wherein: The period heating load is obtained by adding the nighttime heating load of each day to the daytime heating load of each day.

11. The agricultural greenhouse design assisting device according to claim 9 or 10, wherein: The agricultural greenhouse design assistance device comprises: a greenhouse gas emission calculation unit from heating, which calculates the greenhouse gas emission when the required heat is ensured by the operation of the heating equipment, compares it with the greenhouse gas emission when the required heat is ensured by the recovered heat, and calculates the difference between the two as the greenhouse gas reduction amount when the recovered heat is used.

12. The agricultural greenhouse design assisting device according to claim 11, wherein: When the required heat is fully ensured by the recovered heat, fuel consumption=0 and greenhouse gas emission=0.

13. The agricultural greenhouse design assisting device according to claim 11, wherein: The agricultural greenhouse design support device includes a cost calculation unit that calculates the cost required to ensure the required heat by operating the heating equipment and the cost required to ensure the required heat by the recovered heat, and calculates energy cost reduction based on the difference between the two.

14. A computer-readable recording medium having a computer program recorded thereon, the computer program causing a computer to function as an agricultural greenhouse design assisting device for assisting in the design of an agricultural greenhouse to be installed in a given area, the computer program causing the computer to execute the following steps: Obtaining heat that can be recovered and utilized from the heat energy discharged from various machines / equipment; Obtaining basic design information of the agricultural greenhouse; In the agricultural greenhouse having the basic design information, obtaining a heat dissipation coefficient of the agricultural greenhouse when a given plant is cultivated for a given cultivation period; Regarding the amount of the recovered heat, a theoretical value of the floor space of the agricultural greenhouse that can ensure a heating capacity that maintains a set nighttime temperature suitable for the plants is calculated in consideration of the greenhouse heat dissipation coefficient.

15. The computer-readable recording medium according to claim 14, wherein: As the greenhouse heat dissipation coefficient, at least one of a horizontal heat dissipation coefficient and a vertical heat dissipation coefficient of the agricultural greenhouse is used.

16. The computer-readable recording medium according to claim 15, wherein: In the step of calculating the greenhouse heat dissipation coefficient, when the plant is cultivated for the cultivation period, the difference between the inside and outside air temperature between the set night temperature and the regional minimum temperature of the region estimated during the cultivation period is obtained. The horizontal heat dissipation coefficient and the vertical heat dissipation coefficient are obtained by taking into account the difference in temperature between the inside and outside.

17. The computer-readable recording medium according to claim 16, wherein: In the step of calculating the greenhouse heat dissipation coefficient, the soil heat flux of the region during the cultivation period is calculated. The vertical heat dissipation coefficient is calculated based on the soil heat flux.

18. The computer-readable recording medium according to claim 17, wherein: The theoretical value of the coverage area of ​​the agricultural greenhouse that can utilize the recovered heat at a desired efficiency is calculated based on the theoretical value of the floor area, the indoor-outdoor air temperature difference, the soil heat flux, and the basic design information.

19. The computer-readable recording medium according to claim 14, wherein: The design values ​​of the full width and depth of the agricultural greenhouse are obtained so that the design value of the floor area of ​​the agricultural greenhouse becomes equal to or less than the theoretical value of the floor area.

20. The computer-readable recording medium according to claim 18, wherein: The design values ​​of the full width and depth of the agricultural greenhouse are obtained so that the design value of the floor area of ​​the agricultural greenhouse is less than the theoretical value of the floor area. Based on the design value of the floor area, the full width and the depth, and the basic design information, a design value of the covered area of ​​the agricultural greenhouse is obtained below a theoretical value of the covered area.

21. The computer-readable recording medium according to claim 20, wherein: Furthermore, with respect to the daily maximum temperature and the daily minimum temperature obtained from the public meteorological data of the area where the agricultural greenhouse is set up, the heating load for the given cultivation period is calculated using the daily nighttime heating load obtained by taking into account the design value of the floor area and the design value of the covered area, as the required heat for ensuring the set night temperature in the agricultural greenhouse.

22. The computer-readable recording medium according to claim 21, wherein: The period heating load is obtained by adding the nighttime heating load of each day to the daytime heating load of each day.

23. The computer-readable recording medium according to claim 21 or 22, wherein: Furthermore, the emission of greenhouse gases due to heating is calculated, that is, the emission of greenhouse gases when the required heat is ensured by the operation of the heating equipment is obtained, and compared with the emission of greenhouse gases when the required heat is ensured by the recovered heat, and the difference between the two is obtained as the greenhouse gas reduction amount when the recovered heat is used.

24. The computer-readable recording medium according to claim 23, wherein: Furthermore, the cost required to ensure the required amount of heat by operating the heating system and the cost required to ensure the required amount of heat by the recovered heat are respectively obtained, and the energy cost reduction is obtained based on the difference between the two.

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