Method, device, equipment and storage medium for determining building air conditioning load

Abstract

The present invention discloses a method and device for determining the air conditioning load of a building. By pre-establishing a load database related to building characteristic parameters, a user only needs to input some building characteristic parameters and building area of ​​a target building at the project site, and the air conditioning load per unit area of ​​the target building can be quickly evaluated by searching the load database, and then the total air conditioning load of the entire target building can be deduced from the searched air conditioning load per unit area and building area. Since the establishment of the load database takes into account the influence of the building's own characteristics on the air conditioning load, the air conditioning load found through the load database is both accurate and fast.

Description

Technical Field

[0001] The present invention relates to the field of air conditioning technology, and in particular to a method, a device, a equipment and a storage medium. Background Art

[0002] Multi-split air conditioning systems have been increasingly used in commercial buildings. The operating energy consumption level of multi-split units is not only related to their own technical level, but also has a lot to do with whether they have been reasonably selected. If the selection is too large, the partial load rate in the actual operation of the air conditioning system will be too low, which will directly reduce the energy utilization rate of the unit; if the selection is too small, the unit will not be able to meet the needs of indoor cooling, dehumidification and heating, and reduce customer satisfaction. Therefore, air conditioning load calculation plays a decisive role in the reasonable selection of multi-split units. Usually, in the sales process of multi-split units, sales personnel of multi-split units manufacturers are often required to estimate the building air conditioning load at the customer's site and provide a preliminary multi-split selection plan on site.

[0003] At present, one method is to estimate based on experience or by using the building area and unit area load value, but this estimation method does not take into account the impact of the building's own characteristics on the air conditioning load, which often causes a large load estimation error, making the selection of multi-split units very inaccurate. Another method is to use professional load calculation software to achieve refined load calculation, but the setting process of professional load calculation software for building models is very complicated and time-consuming, and it places extremely high demands on the user's experience in the field of building HVAC, making it impossible for air conditioning manufacturer sales staff to quickly and accurately estimate the building load at the customer site and provide a multi-split unit selection plan. Summary of the invention

[0004] The purpose of the present invention is to propose a method, device, equipment and storage medium for determining building air conditioning load in view of the above-mentioned deficiencies in the prior art, and this purpose is achieved through the following technical solutions.

[0005] To achieve the above object, the present invention proposes a method for determining a building air conditioning load, the method comprising:

[0006] Receiving building characteristic parameters and building area input from outside;

[0007] Searching a pre-established load database for the air conditioning load per unit area corresponding to the characteristic parameters of the building;

[0008] The total air-conditioning load is determined according to the building area and the air-conditioning load per unit area.

[0009] Optionally, the building characteristic parameters include building shape, usage type, window-to-wall ratio, location, and ventilation mode.

[0010] Optionally, the method may further include a process of establishing the load database:

[0011] Based on the existing building plan, the building is divided into a variety of different building shapes;

[0012] For each building shape, the air conditioning load per unit area of ​​the building shape under different usage types, different window-to-wall ratios, different regions and different ventilation modes is calculated and stored in the load database.

[0013] Optionally, the calculating of the air conditioning load per unit area of ​​the building shape under different usage types, different window-to-wall ratios, different regions, and different ventilation modes may include:

[0014] Determine various surfaces surrounding the building according to the building shape, wherein the various surfaces include an exterior wall, a roof, and a floor;

[0015] Establishing the inner energy balance equation and the outer energy balance equation of each surface of the building shape under different usage types, different window-to-wall ratios, different regions and different ventilation modes, and establishing the energy balance equation of indoor air;

[0016] The air conditioning load per unit area of ​​the building shape under different usage types, different window-to-wall ratios, different regions and different ventilation modes is obtained by iteratively solving the inner energy balance equation and the outer energy balance equation of each surface and the energy balance equation of indoor air.

[0017] Optionally, the process of establishing the inner energy balance equation, the outer energy balance equation and the energy balance equation of the indoor air of each surface may include:

[0018] Calculate the heat of various heat sources, the heat of air leakage, the heat of fresh air, the heat of fresh air heat recovery and the heat transfer of windows under different usage types, different window-to-wall ratios, different regions and different ventilation modes of the building shape;

[0019] By using the heat of various heat sources, heat from air leakage, heat from fresh air, heat from fresh air heat recovery, and heat transfer from windows corresponding to each situation, the inner energy balance equation, outer energy balance equation, and energy balance equation for indoor air are established.

[0020] The present invention also provides a device for determining a building air conditioning load, the device comprising:

[0021] An input module, used for receiving external input building characteristic parameters and building area;

[0022] A search module, used to search for the air-conditioning load per unit area corresponding to the characteristic parameters of the building in a pre-established load database;

[0023] A determination module is used to determine the total air-conditioning load according to the building area and the air-conditioning load per unit area.

[0024] The present invention also provides a computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the building air conditioning load determination method as described above when executing the program.

[0025] The present invention also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method for determining the building air-conditioning load as described above are implemented.

[0026] Based on the method and device for determining the building air conditioning load described in the first and second aspects above, the technical solution of the present invention has the following beneficial effects or advantages:

[0027] By pre-establishing a load database related to building characteristic parameters, users only need to input some building characteristic parameters of the target building at the project site, and can quickly evaluate the air conditioning load of the target building by searching the load database. And because the establishment of the load database takes into account the impact of the building's own characteristics on the air conditioning load, the air conditioning load found through the load database is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0029] Figure 1 This is a schematic flow chart of an embodiment of a method for determining a building air conditioning load according to an exemplary embodiment of the present invention;

[0030] Figure 2 The present invention is based on Figure 1 The specific flow chart of air conditioning load retrieval shown in the illustrated embodiment;

[0031] Figure 3 A schematic diagram of a flow chart of establishing a load database according to an exemplary embodiment of the present invention;

[0032] Figure 4 The present invention is based on Figure 3 Several schematic diagrams of building plan shapes are shown in the illustrated embodiment;

[0033] Figure 5It is a schematic structural diagram of an electronic device according to an exemplary embodiment of the present invention;

[0034] Figure 6 The figure is a schematic structural diagram of a device for determining building air conditioning load according to an exemplary embodiment of the present invention.

[0035] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0038] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0041] At present, the traditional building air conditioning load estimation method does not take into account the building characteristic parameters and cannot reflect the actual load of the building, resulting in too large an error in the selection of multi-split units. If professional building load simulation software is used, the user's professional skills are too high, the modeling is complex and time-consuming, and sales personnel cannot quickly issue a building load assessment at the project site.

[0042] In order to solve the above technical problems, the present invention proposes an accurate and fast air conditioning load determination method, which pre-establishes a load database related to building characteristic parameters, so that the user only needs to input some building characteristic parameters and building area of ​​the target building at the project site, and can quickly evaluate the unit area air conditioning load of the target building by searching the load database, and then the total air conditioning load of the entire target building can be calculated from the searched unit area air conditioning load and building area. Since the establishment of the load database takes into account the influence of the building's own characteristics on the air conditioning load, the air conditioning load found through the load database is both accurate and fast.

[0043] The building air conditioning load determination method proposed by the present invention is described in detail below with reference to a specific embodiment.

[0044] Figure 1 The present invention is a flow chart of a method for determining a building air conditioning load according to an exemplary embodiment of the present invention. The method for determining a building air conditioning load can be applied to computer devices, such as terminal devices, mobile devices, PCs, servers, and other devices. Figure 1 As shown, the building air conditioning load determination method includes the following steps:

[0045] Step 101: Receive externally input building characteristic parameters and building area.

[0046] In an optional implementation, a user interface including input parameter items may be provided to the user, and the user inputs the building characteristic parameters and building area of ​​the target building on the user interface, so that the background of the device can receive the building characteristic data and building area input by the user.

[0047] In some embodiments, building characteristic parameters may include building shape, usage type, window-to-wall ratio, location, ventilation mode, etc. These parameters will affect the building air conditioning load, so input items for each parameter are set on the user interface.

[0048] Among them, building shape refers to the overall shape of the target building, such as square, rectangular, "U" shape, etc., use type refers to the type divided according to the functional use of the building, such as schools, hospitals, hotels, office buildings, shopping malls, etc., the region refers to the province where the target building is located, and different regions have different climate zones. The ventilation modes include no fresh air mode, fresh air mode, and fresh air + heat recovery mode.

[0049] Step 102: searching a pre-established load database for the air-conditioning load per unit area corresponding to the building characteristic parameter.

[0050] Based on the building characteristic parameters described in step 101 above, the load database records the air-conditioning loads per unit area corresponding to different building shapes, different usage types, different window-to-wall ratios, different regions, and different ventilation modes.

[0051] It is worth noting that the air-conditioning load per unit area includes the sensible cooling load per unit area, the latent cooling load per unit area and the heat load per unit area.

[0052] For the detailed process of establishing the load database, please refer to the description of the following embodiment, and the present invention will not be described in detail here.

[0053] Step 103: Determine the total air conditioning load according to the building area and the air conditioning load per unit area.

[0054] In a specific implementation, the product of the building area and the air-conditioning sensible cooling load per unit area can be directly used as the target building sensible cooling load, the product of the building area and the air-conditioning latent cooling load per unit area can be used as the target building latent cooling load, and the product of the building area and the air-conditioning heat load per unit area can be used as the target building heat load.

[0055] Among them, the sensible cooling load of the target building, the latent cooling load of the target building, and the heat load of the target building constitute the total air-conditioning load of the target building.

[0056] For the process from step 101 to step 103 above, Figure 2 As shown, the user inputs the building use type (i.e. hospital, school, hotel...), building shape (i.e. rectangular, square, "L" shape...), window-to-wall ratio (i.e. 0.2, 0.4, 0.6...), province and region (i.e. Beijing, Shanghai, Guangzhou...), and ventilation mode adopted (i.e. no fresh air, fresh air, fresh air + heat recovery). The background of the device searches the load database for the corresponding air-conditioning sensible cooling load per unit area, air-conditioning latent cooling load per unit area, and air-conditioning heat load per unit area based on these building characteristic parameters input by the user, and then multiplies these three unit area loads with the target building area respectively, so as to obtain the target building sensible cooling load, target building latent cooling load, and target building heat load.

[0057] At this point, the above Figure 1The air conditioning load determination process shown in the figure establishes a load database related to the building characteristic parameters in advance, so that the user only needs to input some building characteristic parameters and building area of ​​the target building at the project site, and can quickly evaluate the air conditioning load per unit area of ​​the target building by searching the load database, and then the total air conditioning load of the entire target building can be calculated from the found air conditioning load per unit area and building area. Since the establishment of the load database takes into account the impact of the building's own characteristics on the air conditioning load, the air conditioning load found through the load database is both accurate and fast.

[0058] Figure 3 FIG. 1 is a flow chart of establishing a load database according to an exemplary embodiment of the present invention. Figure 1 Based on the embodiment shown, the process of establishing the load database includes the following steps:

[0059] Step 301: Divide the building into a variety of different building shapes according to the existing building plan.

[0060] like Figure 4 As shown, eight different shapes of building floor plans are shown, including square, rectangular, circular, "H" shape, "L" shape, "U" shape, circular, and "M" shape.

[0061] It should be noted that for different building shapes, the number of surfaces surrounding the building is different, so the number of energy balance equations that need to be established is different, so commonly used building shapes are divided.

[0062] Step 302: For each building shape, the air conditioning load per unit area of ​​the building shape under different usage types, different window-to-wall ratios, different regions and different ventilation modes is calculated and stored in the load database.

[0063] Optionally, when calculating the air-conditioning load per unit area for each building shape under different usage types, different window-to-wall ratios, different regions and different ventilation modes, the 24-hour weather on the design day of the region is used to calculate the 24-hour hourly load, and then the maximum load value among the 24 load values ​​is taken as the design load and stored in the load database.

[0064] For example, assuming there are 8 building shapes, 5 usage types, 3 window-to-wall ratios (generally ranging from 0.2 to 0.9), 283 prefecture-level cities across the country, and 4 ventilation modes, there are 8*5*3*283*4=135840 combinations of these parameter items, and 135840 data items need to be recorded in the established load database.

[0065] In some embodiments, the surfaces surrounding the building (including exterior walls, roof, and floor) can be determined based on the building shape, and then the inner and outer energy balance equations for each surface and the energy balance equation for indoor air are established under different usage types, different window-to-wall ratios, different regions, and different ventilation modes. The inner and outer energy balance equations for each surface and the energy balance equation for indoor air are then iteratively solved by combining the inner and outer energy balance equations for each surface and the energy balance equation for indoor air to obtain the air-conditioning load per unit area of ​​the building shape under different usage types, different window-to-wall ratios, different regions, and different ventilation modes.

[0066] Among them, each energy balance equation is established according to the building's usage type, window-to-wall ratio, location, and ventilation mode.

[0067] For example, taking a square building shape as an example, it includes 4 walls, 1 roof and 1 floor. For each combination of usage type, window-to-wall ratio, region and ventilation mode, a total of 6 inner energy balance equations and 6 outer energy balance equations need to be established. In addition, 1 indoor air energy balance equation needs to be established. Then, for each combination, the corresponding 13 energy balance equations are iteratively solved by combining them to obtain the air-conditioning load per unit area for this combination.

[0068] It should be noted that before establishing each energy balance equation, it is necessary to obtain the heat exchange terms contained in each energy balance equation in advance, so that the heat of various heat sources, the heat of air leakage, the heat of fresh air, the heat of fresh air heat recovery and the heat transfer of windows under different usage types, different window-to-wall ratios, different regions and different ventilation modes of the building shape can be calculated first, and then the heat of various heat sources, the heat of air leakage, the heat of fresh air, the heat of fresh air heat recovery and the heat transfer of windows corresponding to each situation are used to establish the inner energy balance equation and the outer energy balance equation of each surface and the energy balance equation of indoor air.

[0069] The energy balance equations for walls, roofs, and floors are similar in form. The following takes the calculation of a wall of a building at a certain moment as an example, and the other surfaces are not described in detail.

[0070] (1) The energy balance equation of the outer surface of the wall is:

[0071] Q αsolar +Q out_convective -Q conductive =0 (Equation 1)

[0072] Among them, Q αsolar is the amount of solar radiation absorbed by the outer surface of the wall: Q αsolar =A wall ×E solar ×&,Awall is the surface area of ​​the wall, E solar is the solar radiation per unit area, & is the solar radiation absorption rate;

[0073] Q out_convective is the convective heat exchange between outdoor air and the outer surface of the wall:

[0074] Q out_convective =(T out_air -T out_wall )*δ out_convective *A wall , T out_air is the outdoor ambient temperature, T out_wall is the outer surface temperature of the wall (need to be solved simultaneously), δ out_convective is the convective heat transfer coefficient between the outer surface of the wall and the outdoor air;

[0075] Q conductive is the heat conduction from the outer surface of the wall to the inner surface of the wall:

[0076] Q conductive =(T out_wall -T in_wall )*δ wall *A wall , T in_wall is the inner surface temperature of the wall (needs to be solved simultaneously), δ wall is the heat transfer coefficient inside the wall.

[0077] (2) The energy balance equation of the inner surface of the wall is:

[0078] Q conductive -Q indoor_convective =0 (Equation 2)

[0079] Among them, Q conductive is the amount of heat conducted from the outer surface of the wall to the inner surface of the wall (see the relevant explanation in equation 1 above); Q indoor_convective It is the convection heat transfer coefficient between the inner surface of the wall and the indoor air.

[0080] (3) Energy balance equation for indoor air:

[0081] Q indoor_convective +Q internal +Q infiltration +Q ventilation +Q window -Q recover_total -Q sys =0 (Equation 3)

[0082] Among them, Q indoor_convective See the explanation in equation 2 above, Q sys is the building air conditioning load (need to be solved simultaneously), Qinternal It is the sum of the heat of indoor people, lighting and electrical equipment. The heat of indoor people: Q people_total =A room *F people_schedule *q Person *N people_area , A room is the indoor area, F people_schedule is the occupancy rate (this value varies for different usage types), q Person is the calorific value of a single person, N people_area is the number of people per unit area (this value varies for different usage types); the heat of indoor lighting Q light_total =A room *F light_schedule *q light_per_area , F light_schedule is the lighting rate schedule (the data varies in different regions and usage types), q light_per_area is the lighting power per unit area; the heat of indoor electrical equipment Q equip_total =A room *F equip_schedule *q equip_per_area , F equip_schedule is the schedule of electrical equipment utilization (the data varies in different regions and usage types), q equip_per_area is the equipment power per unit area;

[0083] Q infiltration is the heat loss due to indoor air leakage, Q infiltration =1.2*V infiltration *Δh,V infiltration is the leakage volume flow rate, Δh is the enthalpy difference between leakage and indoor air;

[0084] Q ventilation is the heat loss of indoor fresh air, Q ventilaation =1.2*V ventilation *Δh,V ventilation is the fresh air volume flow rate;

[0085] Q window It is the heat that enters the room from the window, including the heat radiated by the sun through the window Q solar_heat =A window *E solar *SHGC and the heat conducted through the window by the outdoor environment Q c =δ window *A window *(T out_air -T in_air ), A window is the window area (obtained from the window-to-wall ratio and the wall area), E solarSee the explanation in equation 1 above, SHGC is the thermal conductivity of the sun through the window, δ window is the thermal conductivity of the window glass, T out_air and T in_air See the relevant explanation above;

[0086] Q recover_total It is the heat recovered from the exhaust air of the ventilation system by the building heat recovery device, which includes the sensible heat recovery heat Q recover_sensible =1.2*eff sensible *V ventilation *C air (T in_air -T out_air ) and latent heat recovery eff sensible is the sensible heat recovery efficiency, C air is the specific heat of air, V ventilation is the fresh air volume flow rate, The difference in indoor and outdoor air humidity, eff latent is the latent heat recovery efficiency.

[0087] Taking the square building as an example, the surface surrounding the building includes 4 walls, 1 roof, and 1 floor. By iteratively solving 13 energy balance equations, 12 surface temperatures (including the external surface temperature T out_wall and the inner surface temperature T in_wall ) and building air conditioning load Q sys , the building air conditioning load Q sys Divide by the building area to get the air conditioning load per unit area.

[0088] At this point, the above Figure 3 The load database establishment process is shown in the figure. Since the establishment of the load database takes into account the impact of the building's own characteristics on the air conditioning load, the air conditioning load found through the load database is relatively accurate.

[0089] Figure 5 This is a hardware structure diagram of an electronic device according to an exemplary embodiment of the present invention, and the electronic device includes: a communication interface 201, a processor 202, a machine-readable storage medium 203, and a bus 204; wherein the communication interface 201, the processor 202, and the machine-readable storage medium 203 communicate with each other through the bus 204. The processor 202 can execute the building air conditioning load determination method described above by reading and executing the machine executable instructions corresponding to the control logic of the building air conditioning load determination method in the machine-readable storage medium 203. The specific content of the method is referred to the above embodiment, and will not be repeated here.

[0090] The machine-readable storage medium 203 mentioned in the present invention can be any electronic, magnetic, optical or other physical storage device, which can contain or store information, such as executable instructions, data, etc. For example, the machine-readable storage medium can be: volatile memory, non-volatile memory or similar storage medium. Specifically, the machine-readable storage medium 203 can be RAM (Random Access Memory), flash memory, storage drive (such as hard disk drive), any type of storage disk (such as optical disk, DVD, etc.), or similar storage medium, or a combination thereof.

[0091] Corresponding to the above-mentioned embodiment of the method for determining the building air-conditioning load, the present invention also provides an embodiment of the device for determining the building air-conditioning load.

[0092] Figure 6 FIG. 1 is a schematic diagram of a structure of a device for determining a building air conditioning load according to an exemplary embodiment of the present invention. Figure 1 Based on the embodiment shown, the building air conditioning load determination device includes:

[0093] An input module 610 is used to receive building characteristic parameters and building areas input from outside;

[0094] A search module 620 is used to search for the air conditioning load per unit area corresponding to the building characteristic parameter in a pre-established load database;

[0095] The determination module 630 is used to determine the total air-conditioning load according to the building area and the air-conditioning load per unit area.

[0096] In an optional implementation, the device further includes ( Figure 6 Not shown):

[0097] The database establishment module is used to divide the building into a variety of different building shapes according to the existing building plan; for each building shape, the air-conditioning load per unit area of ​​the building shape under different usage types, different window-to-wall ratios, different regions and different ventilation modes is calculated and stored in the load database.

[0098] In an optional implementation, the database establishment module is specifically used to determine the various surfaces surrounding the building according to the building shape, wherein the various surfaces include exterior walls, roofs and floors; establish inner energy balance equations and outer energy balance equations for various surfaces of the building shape under different usage types, different window-to-wall ratios, different regions and different ventilation modes, and establish an energy balance equation for indoor air; and iteratively solve the inner energy balance equation and the outer energy balance equation of each surface and the energy balance equation of indoor air by combining the energy balance equation of the indoor air to obtain the air-conditioning load per unit area of ​​the building shape under different usage types, different window-to-wall ratios, different regions and different ventilation modes.

[0099] In an optional implementation, the database establishment module is specifically used to calculate the heat of various heat sources, the heat of air leakage, the heat of fresh air, the heat of fresh air heat recovery and the heat transfer of windows for the building shape under different usage types, different window-to-wall ratios, different regions and different ventilation modes; and to establish the inner energy balance equation and the outer energy balance equation of each surface and the energy balance equation of the indoor air by using the heat of various heat sources, the heat of air leakage, the heat of fresh air, the heat of fresh air heat recovery and the heat transfer of windows corresponding to each situation.

[0100] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A method for determining building air conditioning load, characterized in that: The method comprises: Receiving external input of building characteristic parameters and building area; the building characteristic parameters include building shape, usage type, window-to-wall ratio, location and ventilation mode; Searching the air conditioning load per unit area corresponding to the characteristic parameters of the building in a pre-established load database; the air conditioning load per unit area includes the air conditioning sensible cooling load per unit area, the air conditioning latent cooling load per unit area and the air conditioning heat load per unit area; Determine the total air conditioning load according to the building area and the air conditioning load per unit area; The method further includes a process of establishing the load database: Based on the existing building plan, the building is divided into a variety of different building shapes; For each building shape, the air conditioning load per unit area of ​​the building shape under different usage types, different window-to-wall ratios, different regions and different ventilation modes is calculated and stored in the load database; The calculation of the air conditioning load per unit area of ​​the building shape under different usage types, different window-to-wall ratios, different regions and different ventilation modes includes: Determine various surfaces surrounding the building according to the building shape, wherein the various surfaces include an exterior wall, a roof, and a floor; Establishing the inner energy balance equation and the outer energy balance equation of each surface of the building shape under different usage types, different window-to-wall ratios, different regions and different ventilation modes, and establishing the energy balance equation of indoor air; By iteratively solving the inner energy balance equation and the outer energy balance equation of each surface and the energy balance equation of indoor air, the air conditioning load per unit area of ​​the building shape under different usage types, different window-to-wall ratios, different regions and different ventilation modes is obtained; The process of establishing the inner energy balance equation, the outer energy balance equation and the energy balance equation of the indoor air of each surface includes: Calculate the heat of various heat sources, the heat of air leakage, the heat of fresh air, the heat of fresh air heat recovery and the heat transfer of windows under different usage types, different window-to-wall ratios, different regions and different ventilation modes of the building shape; By using the heat of various heat sources, heat from air leakage, heat from fresh air, heat from fresh air heat recovery, and heat transfer from windows corresponding to each situation, the inner energy balance equation, outer energy balance equation, and energy balance equation for indoor air are established.

2. A device for determining building air conditioning load, characterized in that: The device comprises: An input module, used to receive external input building characteristic parameters and building area; the building characteristic parameters include building shape, usage type, window-to-wall ratio, location and ventilation mode; A search module, used to search for the air conditioning load per unit area corresponding to the building characteristic parameters in a pre-established load database; the air conditioning load per unit area includes the air conditioning sensible cooling load per unit area, the air conditioning latent cooling load per unit area and the air conditioning heating load per unit area; A determination module, configured to determine a total air-conditioning load according to the building area and the air-conditioning load per unit area; The device also includes: A database establishment module is used to divide the building into a plurality of different building shapes according to the existing building plan; for each building shape, the air conditioning load per unit area of ​​the building shape under different usage types, different window-to-wall ratios, different regions and different ventilation modes is calculated and stored in the load database; The database establishment module is specifically used to determine various surfaces surrounding the building according to the building shape, wherein the various surfaces include exterior walls, roofs and floors; establish inner energy balance equations and outer energy balance equations of various surfaces of the building shape under different usage types, different window-to-wall ratios, different regions and different ventilation modes, and establish an energy balance equation for indoor air; iteratively solve the inner energy balance equations and outer energy balance equations of various surfaces and the energy balance equation for indoor air to obtain the air conditioning load per unit area of ​​the building shape under different usage types, different window-to-wall ratios, different regions and different ventilation modes; The database establishment module is also specifically used to calculate the heat of various heat sources, the heat of air leakage, the heat of fresh air, the heat of fresh air heat recovery and the heat transfer of windows for the building shape under different usage types, different window-to-wall ratios, different regions and different ventilation modes; and to establish the inner energy balance equation and the outer energy balance equation of each surface and the energy balance equation of indoor air by using the heat of various heat sources, the heat of air leakage, the heat of fresh air, the heat of fresh air heat recovery and the heat transfer of windows corresponding to each situation.

3. A computer device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the steps of the method according to claim 1 are implemented when the processor executes the program.

4. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method according to claim 1 are implemented.

Images