Heating and ventilation load calculation method and system based on BIM platform

Abstract

The invention discloses a heating and ventilation load calculation method and system based on a BIM platform. The method comprises the steps that calculation methods are obtained according to heating and ventilation design specifications, and each calculation method comprises input data, a calculation process and output data of the corresponding calculation method; the input data are classified according to data categories, the logic relation between the input data is summarized, original data logic and algorithm logic of the calculation process are obtained, and the data categories comprise model data, table look-up data and user interaction data; and outputting a cooling and heating load calculation book through the BIM platform according to the original data logic and the algorithm logic. Through the method and the device, the problems of low efficiency and high user operation requirements of a traditional calculation method in related technologies are solved.

Description

Technical Field

[0001] The present invention relates to the field of HVAC calculation technology, and in particular, to a HVAC load calculation method and system based on a BIM platform. Background Art

[0002] HVAC cooling and heating load calculation is the most basic and important part of the entire HVAC design. The purpose of HVAC load calculation is to master the cooling and heating load data of the building, so as to select appropriate heat dissipation equipment, air conditioning equipment, etc. At present, designers often select a larger safety factor when designing in order to meet the use requirements of the building, resulting in excessive equipment capacity, increased investment and energy waste. Through accurate calculation, it is possible to avoid selecting equipment with excessive capacity during the design process, making the design more reasonable and energy-saving.

[0003] The basic data for HVAC load calculation mainly include the following items:

[0004] 1) Building envelope information, mainly including the heat transfer coefficient, area, orientation, and space of the wall; the heat transfer coefficient, area, orientation, and space of the transparent envelope (external windows, curtain walls, skylights, etc.); the heat transfer coefficient, area, orientation, and space of the external door.

[0005] 2) The number of people using each space, their activity status, and working hours.

[0006] 3) The number of equipment in each space, the rated power of the equipment, and the working hours.

[0007] 4) Lighting power and working hours in each space.

[0008] 5) Design operating temperature of each space in winter and summer.

[0009] 6) The area and volume of the entire space.

[0010] At present, HVAC load calculation can be calculated by professional load calculation software. This method requires drawings that are compatible with the load calculation software format, but most 3D design platforms based on BIM platforms cannot output drawings in related formats. Most 3D design software based on BIM platforms do not have load calculation functions, or do not comply with the calculation methods specified in the "Design Code for Heating, Ventilation and Air Conditioning of Civil Buildings".

[0011] With the rapid development of building information modeling (BIM) technology, BIM has been widely used in building design, construction, operation and maintenance. BIM models can not only provide a three-dimensional visual model of the building, but also contain a wealth of building-related data information. In the field of HVAC design, accurate load calculation is an important part of ensuring a comfortable environment in the building. Traditional HVAC load calculation mainly relies on manually extracting the spatial information of the building (such as room area, enclosure structure, floor height, etc.), and then performing load calculation based on this information through relevant software or formulas.

[0012] The following are the existing plans:

[0013] Solution 1: The building envelope information is manually measured directly from the model or drawings, including the area of ​​walls, doors and windows, space volume, etc. The heat transfer coefficient is provided by the architecture department. The information on personnel, equipment, lighting, etc. in the space is obtained from the room function table provided by the owner. Then the above information is manually input into the professional load calculation software for HVAC load calculation.

[0014] Solution 2: Develop a load calculation information extraction plug-in based on the BIM platform, extract spatial information through the plug-in in the 3D design model, then export the above information through a gbxml format file, and then import it into professional load calculation software for HVAC load calculation.

[0015] Disadvantages of the above existing solutions:

[0016] 1. Complex data extraction: Although the BIM model contains rich building information, in order to convert this information into the parameters required for HVAC load calculation, users often need to manually extract and organize it, which makes it impossible to fully utilize the existing building data information in the BIM model. Measuring the enclosure structure information from the model or drawings is inefficient, with poor accuracy and easy to miss calculations; obtaining personnel, lighting, equipment and other information from unstructured data tables is time-consuming, labor-intensive and error-prone; the process of manually inputting it into professional load calculation software is cumbersome, inefficient and error-prone.

[0017] 2. Low calculation efficiency: Under the traditional method, HVAC designers need to input the information extracted from the BIM model into a specific load calculation software for calculation. The whole process is time-consuming and labor-intensive, and cannot meet the requirements for calculation speed in large projects. When exporting through gbxml, it is necessary to switch between different software, and data loss is prone to occur during the import and export process. When the building plan changes, the operation needs to be repeated.

[0018] 3. High user operation requirements: Although the existing BIM-based load calculation software can perform calculations, it usually requires users to have high professional knowledge and skills, and the operation is complicated, which affects the popularity and efficiency of the software.

[0019] 4. The results are not intuitive enough: The load calculation reports generated by existing software are usually separated from the BIM model. When users check and analyze the calculation results, it is difficult to intuitively correspond them with the actual building model.

[0020] Currently, no effective solution has been proposed for the above-mentioned problems existing in the related technologies. Summary of the invention

[0021] The main purpose of this application is to provide a HVAC load calculation method and system based on a BIM platform, so as to at least solve the problem that traditional calculation methods in related technologies are inefficient and have high requirements on user operation.

[0022] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a method for calculating HVAC load based on a BIM platform is provided. The method comprises: obtaining a calculation method according to HVAC design specifications, wherein the calculation method comprises input data, calculation process and output data of each calculation method; classifying the input data according to data categories, summarizing the logical relationship between each input data, and obtaining the original data logic and algorithm logic of the calculation process, wherein the data categories include model data, table lookup data and user interaction data; outputting the heat and cold load calculation book through the BIM platform according to the original data logic and algorithm logic.

[0023] Optionally, obtain model components corresponding to the model data and the acquisition method; obtain the standard table and dependent variable data corresponding to the table lookup data; and obtain the input interaction method of the user interaction data.

[0024] Optionally, analyze the room settings in the building model to batch generate spatial components in the building model; extract the enclosure structure information of the spatial components, analyze the geometric information of the spatial components to obtain the area, orientation and heat transfer coefficient of the enclosure structure, wherein the enclosure structure information includes exterior walls, interior walls, exterior windows, interior windows, exterior doors, interior doors, ground and roof; create a new load calculation project; add the spatial components to be calculated to the calculation list in the load calculation project; set technical parameters based on the content to be calculated, the original data logic and the algorithm logic; output the cold and heat load calculation book, wherein the cold and heat load calculation book includes the content to be calculated, technical parameters and attribute parameters of the enclosure structure information spatial components.

[0025] Optionally, basic information about personnel, lighting, and equipment of the space component is added to the attribute parameters of the space component.

[0026] Optionally, set the location of the load calculation project; set the compass of the load calculation project.

[0027] Optionally, technical parameters are set for different space components, the technical parameters including summer air-conditioning design temperature and winter heating design temperature.

[0028] According to another aspect of the present application, a HVAC load calculation system based on a BIM platform is provided. The system includes: a computing system developed based on a BIM platform integrates a system architecture and a database, wherein the system architecture includes a user interface layer, an application logic layer, a core tool layer, a computing processing layer, a data interaction layer and a data storage layer, and the database stores standard tables.

[0029] Optionally, the user interface layer includes: a project management module, a file operation module, a calculation result display module, a load object operation module and a tool operation interface module; the core tool layer includes: an analysis model creation module, an analysis space creation module, a model data extraction module, an automatic global analysis module, a load object creation module, a component positioning module, a component library module, an export calculation book module, a calculation mode switching module, a view restoration module, and a display external envelope structure module; the calculation processing layer includes: a load object data processing module, a cold load calculation module, a heat load calculation module, and a structural library management module.

[0030] Optionally, the application logic layer includes a project hierarchy tree management module, a file operation management module, and a load object management module; the data interaction layer includes a data addition, deletion, modification, and query module; and the data storage layer includes a project file module, a specification data module, a model data module, a calculation process data module, and a user data module.

[0031] Optionally, the database stores data extracted from the standard table for calling, traversing and querying at any time.

[0032] Through this application, the following steps are adopted: obtaining a calculation method according to HVAC design specifications, wherein the calculation method includes input data, calculation process and output data of each calculation method; classifying the input data according to data categories, summarizing the logical relationship between each input data, and obtaining the original data logic and algorithm logic of the calculation process, wherein the data categories include model data, table lookup data and user interaction data; automatically outputting the cooling and heating load calculation book through a self-developed intelligent system based on the BIM platform according to the original data logic and algorithm logic, thereby solving the problem of low efficiency and high user operation requirements of traditional calculation methods in related technologies, thereby achieving the effect of efficient HVAC calculation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a flow chart of a method for calculating HVAC load based on a BIM platform provided according to an embodiment of the present application;

[0035] Figure 2 This is the flow chart of the hourly cooling load calculation algorithm for the first external enclosure;

[0036] Figure 3 The flow chart of the algorithm for calculating hourly cooling load of the second outer enclosure;

[0037] Figure 4 This is the flow chart of the calculation algorithm for hourly cooling load of the third outer enclosure;

[0038] Figure 5 A flowchart for computing operations;

[0039] Figure 6 It is a schematic diagram of a HVAC load calculation system based on a BIM platform provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0041] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0042] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0043] As introduced in the background technology, the existing technology has complex data extraction, low calculation efficiency, high user operation requirements, and unintuitive results. In order to solve the problems of low efficiency and high user operation requirements of traditional calculation methods in related technologies, the embodiments of the present application provide a HVAC load calculation method and system based on a BIM platform.

[0044] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0045] In this embodiment, a HVAC load calculation method based on a BIM platform is provided and runs on a mobile terminal, a computer terminal or a similar computing device. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0046] Figure 1 is a flow chart of a method for calculating HVAC load based on a BIM platform according to an embodiment of the present application. Figure 1 As shown, the method comprises the following steps:

[0047] Step S101, obtaining a calculation method according to HVAC design specifications, wherein the calculation method includes input data, calculation process and output data of each calculation method;

[0048] Specifically, existing HVAC design specifications and manuals are collected and summarized, calculation methods that meet current design needs are extracted, and the input data, calculation process and output data of each calculation method are summarized.

[0049] Step S102, classifying the input data according to data categories, summarizing the logical relationship between each piece of input data, and obtaining the original data logic and algorithm logic of the calculation process, wherein the data categories include model data, table lookup data, and user interaction data;

[0050] Specifically, the input data is classified according to the model extractable data, standard table lookup data and user interaction data. According to the classification, the source of each data is gradually sorted out. Model data needs to clarify the model components and acquisition methods corresponding to the data source. Table lookup data needs to find the corresponding standard table and dependent variable data. User interaction data needs to state the input interaction method of the data. Data with upstream and downstream relationships needs to summarize the logical relationship between the data, and then combined with the calculation method of the standard manual, the original data logic and algorithm logic of all calculation processes are obtained.

[0051] For example, for the hourly cooling load calculation algorithm of the external enclosure, the calculation process and data relationship are sorted out as follows: Figure 2-4 As shown, Figure 2-4 For the decomposition of a flowchart:

[0052] Extract information from the project parameters set by the user, then query the database to obtain relevant parameters through the project location, and obtain relevant parameters through database search based on the orientation and transparency level of the enclosure structure. - Daily average of total solar radiation in the direction of the enclosure structure ( ), according to Appendix C of "Design Code for Heating, Ventilation and Air Conditioning of Civil Buildings" GB50736-2012;

[0053] Extracting project parameters set by the user and , Calculate the average daily comprehensive temperature (℃) for the outdoor air-conditioning in summer. Calculate the average daily temperature (°C) for the outdoor air-conditioning in summer. The absorption coefficient of solar radiation heat on the outer surface of the enclosure structure is a constant of 0.9. The average outdoor wind speed in summer is extracted from the project parameters set by the user and the database is queried to obtain relevant parameters. , is the heat transfer coefficient of the outer surface of the enclosure structure. Finally, we get , is the daily average of the total solar radiation irradiance in the direction of the enclosure structure ( ). Get , is the daily average outdoor air comprehensive temperature in Beijing, and then the formula is obtained ,in, is the location correction value of the enclosure structure, It is the daily average outdoor air comprehensive temperature of the design location. The location correction value of the enclosure structure can also be obtained by querying the database to obtain relevant parameters through the project parameters set by the user, the project location, the algorithm extraction model information, and the enclosure structure orientation.

[0054] The average summer wind speed is extracted through the project parameters set by the user, and the database is queried to obtain the relevant parameters to obtain the heat transfer coefficient and External surface heat release coefficient correction value. Users directly enter the wall color to query the database to obtain Correction value of solar absorption coefficient on the outer surface of the enclosure structure. The user directly enters the wall type to query the relevant parameters. The hourly value of the cooling load calculation temperature of the exterior wall and roof. Based on the above content, the hourly value of the comprehensive cooling load calculation temperature of the exterior wall and roof is obtained. , . is the location correction value of the enclosure structure, , is the average daily outdoor air temperature in Beijing, It is the daily average outdoor air comprehensive temperature of the design location. The user directly enters or extracts the indoor temperature in the project set by the user. , the user directly enters the heat transfer coefficient , the model information is extracted through the algorithm to obtain the area of ​​the exterior wall and roof Based on these parameters, the final external wall enclosure hourly cooling load calculation is obtained .

[0055] Step S103, outputting the cooling and heating load calculation book through the BIM platform according to the original data logic and algorithm logic; utilizing the highly integrated characteristics of the model and data in the BIM platform, developing an intelligent calculation system to automatically output the cooling and heating load calculation book according to the summarized data logic and algorithm logic.

[0056] Reference Figure 5 , Figure 5 To calculate the flowchart of the business, create a spatial component in the building model and obtain the cold and hot load calculation book through the original data logic and algorithm logic. First open the building model, create a spatial model in the building model, and each spatial model has corresponding spatial information. According to the spatial information, the geometric information of the enclosure structure can be analyzed, and the user is also required to supplement the spatial information with personnel, lighting, equipment and other information. Create a new project based on the spatial information, and the project location, compass angle and other settings need to be set in the project. After the new project is created, the calculation space is added according to the enclosure structure information and personnel, lighting, equipment and other information, and then the calculation settings are performed and the calculation book is output. When performing the calculation settings, the calculation parameters are set in detail for each load item.

[0057] This application takes advantage of the data integration of the BIM platform and the open API interface, and automatically extracts the data and parameters required for HVAC load calculations through embedded development, automating the tedious parameter input and setting process in the early stages of calculations under existing technologies. Taking advantage of the visualization of the BIM platform, the calculation process and the actual model are associated and bound through embedded development, so that the three-dimensional entity and parameter status of the corresponding load object can be located and viewed at any time, which not only ensures the reliability of the data, but also increases the visualization experience, making it easier for users to control the calculation process and verify the results, and improving the friendliness of the system. The HVAC load calculation method in the commonly used HVAC professional specification manual is combined with the BIM model data to develop an intelligent algorithm to automatically generate HVAC load calculation results for auxiliary guidance of HVAC professional engineering design. The innovative interface design is a simple and friendly interactive interface designed according to the usage habits of HVAC professional users to improve the usability of the system.

[0058] In an optional embodiment, the model components and the acquisition method corresponding to the model data are obtained; the standard table and dependent variable data corresponding to the table lookup data are obtained; and the input interaction method of the user interaction data is obtained.

[0059] In an optional embodiment, the room settings in the building model are analyzed to batch generate space components in the building model; the enclosure structure information of the space components is extracted, and the geometric information of the space components is analyzed to obtain the area, orientation and heat transfer coefficient of the enclosure structure, wherein the enclosure structure information includes exterior walls, interior walls, exterior windows, interior windows, exterior doors, interior doors, ground and roof; a new load calculation project is created; in the load calculation project, the space components to be calculated are added to the calculation list; technical parameters are designed based on the content to be calculated, the original data logic and the algorithm logic; and a cold and hot load calculation book is output, wherein the cold and hot load calculation book includes the content to be calculated, the technical parameters and the attribute parameters of the enclosure structure information space components.

[0060] Specifically, the plug-in creates space functions in the building model and creates space components in batches in the model. The plug-in automatically analyzes and quickly generates space components in the model based on the room settings in the building model, which are used to analyze the enclosure structure and indoor personnel, lighting, equipment and other information. The enclosure structure information of the space includes enclosure structures such as exterior walls, exterior windows, exterior doors, and roofs. The plug-in automatically obtains the area, orientation, heat transfer coefficient and other basic data of the enclosure structure for load calculation by analyzing the geometric information of the space components.

[0061] In an optional embodiment, basic information about personnel, lighting, and equipment of the space component is added to the attribute parameters of the space component.

[0062] Specifically, the basic information of the space’s personnel, lighting, and equipment needs to be completed by the user and written into the attribute parameters of the space, which the plug-in automatically extracts when analyzing the space information.

[0063] In an optional embodiment, a location of the load calculation project is set; and a compass of the load calculation project is set.

[0064] Specifically, after creating a new project, you need to set up the project and the project location. Select the actual location of the project on the weather management page. The plug-in automatically uses the weather parameters of the location as the basic data for load calculation. This is very important. Set the project compass. The compass determines the direction of the enclosure structure, which is very important for HVAC load calculation. The plug-in will automatically extract and analyze the direction of the enclosure structure based on the compass direction in the project.

[0065] In an optional embodiment, technical parameters are set for different space components, and the technical parameters include summer air-conditioning design temperature and winter heating design temperature.

[0066] Specifically, select the space that needs load calculation and add it to the calculation list. After adding, the load items of each space are automatically calculated and added to the calculation list. Set the design temperature of summer air conditioning, winter heating design temperature and other information for different spaces; design the relevant parameters of load calculation for each load item, such as the sunshade of the window needs to be set when calculating the cold load of the external window, and the permeability coefficient of the door and window needs to be set when calculating the heat load, etc. After the calculation is completed, the calculation book of the cold and hot load calculation is output.

[0067] This application simplifies the complexity of manual operations in the HVAC load calculation process under the existing technology with the assistance of intelligent algorithms, reduces the error rate, and improves calculation efficiency and accuracy. Make full use of the existing data and information in the BIM platform, solve the problem of information islands across data platforms, reasonably utilize BIM data and link it downward to achieve effective data flow and reuse. Fully combining the visualization and immediacy advantages of the BIM platform, the three-dimensional solid model and data information of the corresponding load object can be located and viewed in real time during the calculation process, improving the reliability of the calculation process data and increasing the interactive experience. The innovative interface design simplifies the user operation process compared to existing similar calculation software, making the HVAC load calculation process simpler and lowering the user's knowledge and skill thresholds.

[0068] The embodiment of the present application also provides a HVAC load calculation system based on the BIM platform. It should be noted that the HVAC load calculation system based on the BIM platform of the embodiment of the present application can be used to execute the HVAC load calculation method based on the BIM platform provided in the embodiment of the present application. The system is used to implement the above-mentioned embodiments and preferred implementation modes, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and / or hardware for a predetermined function. Although the system described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceived.

[0069] The following introduces a HVAC load calculation system based on a BIM platform provided in an embodiment of the present application.

[0070] Figure 6 is a structural block diagram of a HVAC load calculation system based on a BIM platform according to an embodiment of the present application. Figure 6 As shown, the system includes: a system architecture and a database are integrated in a computing system developed based on a BIM platform, wherein the system architecture includes a user interface layer, an application logic layer, a core tool layer, a computing processing layer, a data interaction layer and a data storage layer, and standard tables are stored in the database.

[0071] Specifically, in order to ensure that the responsibilities of each functional module are clear, which is conducive to expansion and maintenance, the functional modules of the system are refined, the system is planned from the perspective of hierarchy and responsibility division, and a complete system architecture is designed. The system is divided into six levels, including: user interface layer, application logic layer, core tool layer, calculation and processing layer, data interaction layer and data storage layer. Each level has its corresponding responsibilities and functional modules. The system architecture clarifies the responsibilities of each functional module through hierarchical division. The application logic layer serves as a bridge to combine the user interface with data processing, while ensuring the independence of each module. The data interaction layer is to further enhance the flexibility and scalability of the system, so that the system can be more adaptable to cross-platform and cross-system work requirements, so as to facilitate platform migration and expansion in the future. This layered architecture is easy to maintain and expand. For example, more load calculation types can be added in the future or multiple report formats can be supported. At the same time, the load calculation module based on the self-developed algorithm can ensure flexibility and professionalism, and can meet the load calculation requirements of complex buildings.

[0072] In an optional embodiment, the user interface layer includes: a project management module, a file operation module, a calculation result display module, a load object operation module and a tool operation interface module; the core tool layer includes: an analysis model creation module, an analysis space creation module, a model data extraction module, an automatic global analysis module, a load object creation module, a component positioning module, a component library module, an export calculation book module, a calculation mode switching module, a view restoration module, and a display external enclosure structure module; the calculation processing layer includes: a load object data processing module, a cold load calculation module, a heat load calculation module, and a structural library management module.

[0073] Specifically, the project management module is used for project hierarchy tree display, project sub-object addition, deletion and modification interaction, the file operation module is used to control file opening, new creation, saving and save-as interaction, the calculation result display module is used to display load calculation results at space level and project level, the load object operation module is used for interface interaction related to load object parameter setting, the tool operation interface module is used for interface interaction related to core tools, the creation analysis model module is used to generate energy analysis model for load calculation based on BIM model, the creation analysis space module is used to generate space objects for load calculation based on BIM model room, the model data extraction module is used to extract component attribute information for load calculation in BIM model, the automatic global analysis module is used to automatically perform global load calculation analysis, the creation load object module is used to customize the creation and modification of load objects according to calculation needs, and the component positioning module is used to help users quickly locate components in the model. The component library module is used to batch manage the relevant properties of load objects according to the thermal performance data of the materials. The calculation book export module is used to export the corresponding load calculation book according to the calculation results. The calculation mode switching module is used to switch the cold and hot load calculation mode. The view restoration module is used to allow the user to restore the BIM view to the previous state to compare the differences before and after the model. The display external envelope module is used to isolate and display the building external envelope for user analysis and viewing. The load object data processing module is used to provide preprocessing and calculation of load object related data, and maintain the mapping relationship between the load object and the component properties in the BIM model. The cold load calculation module is used to execute the core calculation logic of the cold load. The heat load calculation module is used to execute the core calculation logic of the heat load. The construction library management module is used to process the thermal performance data of materials in the building construction library, such as thermal conductivity and heat capacity of walls and windows.

[0074] In an optional embodiment, the application logic layer includes a project hierarchy tree management module for managing the project tree, updating the building load object structure, controlling the project file loading and saving logic, a file operation management module for controlling the file opening, creating, saving, and saving as logic, a load object management module for processing the load object data addition, deletion, and modification logic according to calculation requirements, and a data interaction layer includes a data addition, deletion, modification, and query module for performing operation logic of adding, deleting, modifying, and querying data with the data storage layer according to other hierarchical requirements, so as to support internal functions and external expansion and enhance the maintainability of the system; the data storage layer includes a project file module for processing the creation, saving, opening, and saving as of project files, a specification data module for processing the relevant data information involved in the specification items or tables, a model data module for processing the data information extracted from the BIM model, a calculation process data module for recording and managing the calculation process data, and a user data module for recording and managing user data.

[0075] In an optional embodiment, the data extracted from the standard table is stored in the database for calling, traversing and querying at any time.

[0076] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for calculating HVAC load based on BIM platform, characterized in that: include: Obtaining a calculation method according to HVAC design specifications, wherein the calculation method includes input data, calculation process, and output data of each calculation method; Classify the input data according to data categories, summarize the logical relationship between each piece of input data, and obtain the original data logic and algorithm logic of the calculation process, wherein the data categories include model data, table lookup data and user interaction data; The cooling and heating load calculation sheet is output through the BIM platform according to the original data logic and algorithm logic.

2. The method according to claim 1, characterized in that: The input data is classified according to data categories, and the logical relationship between each piece of input data is summarized to obtain the original data logic and algorithm logic of the calculation process, including: Obtaining the model component corresponding to the model data and the acquisition method; Obtaining the standard table and dependent variable data corresponding to the table lookup data; Acquire the input interaction mode of the user interaction data.

3. The method according to claim 1, characterized in that According to the original data logic and algorithm logic, the cooling and heating load calculation sheet is output through the BIM platform, including: Analyze the room settings in the building model and batch generate space components in the building model; Extracting the enclosure structure information of the space component, analyzing the geometric information of the space component to obtain the area, orientation and heat transfer coefficient of the enclosure structure, wherein the enclosure structure information includes the exterior wall, interior wall, exterior window, interior window, exterior door, interior door, ground and roof; New load calculation project; In the load calculation project, the space component to be calculated is added to a calculation list; Set technical parameters based on the content to be calculated, original data logic and algorithm logic; Output the cooling and heating load calculation sheet, wherein the cooling and heating load calculation sheet includes the content to be calculated, technical parameters, enclosure structure information and attribute parameters of the space components.

4. The method according to claim 3, characterized in that Before extracting the enclosure structure information of the space component and analyzing the geometric information of the space component to obtain the area, orientation and heat transfer coefficient of the enclosure structure, the method includes: The basic information of the personnel, lighting and equipment of the space component is added to the attribute parameters of the space component.

5. The method according to claim 3, characterized in that: New load calculation project, including: Setting the location of the load calculation project; Set the compass for the load calculation project.

6. The method according to claim 3, characterized in that Set technical parameters based on the content to be calculated, the original data logic and the algorithm logic, including: Technical parameters are set for different space components, and the technical parameters include summer air-conditioning design temperature and winter heating design temperature.

7. A heating and ventilation load calculation system based on a BIM platform, applied to a heating and ventilation load calculation method based on a BIM platform as described in any one of claims 1 to 6, characterized in that: include: The computing system developed based on the BIM platform integrates a system architecture and a database, wherein the system architecture includes a user interface layer, an application logic layer, a core tool layer, a computing processing layer, a data interaction layer and a data storage layer, and the database stores standard tables.

8. The system according to claim 7, characterized in that include: The user interface layer includes: a project management module, a file operation module, a calculation result display module, a load object operation module and a tool operation interface module; The core tool layer includes: creating analysis model module, creating analysis space module, model data extraction module, automatic global analysis module, creating load object module, component positioning module, component library module, exporting calculation book module, calculation mode switching module, view restoration module, and displaying external enclosure structure module; The calculation and processing layer includes: a load object data processing module, a cold load calculation module, a heat load calculation module, and a structure library management module.

9. The system according to claim 7, characterized in that include: The application logic layer includes the project hierarchy tree management module, the file operation management module, and the load object management module; The data interaction layer includes a data addition, deletion, modification and query module; The data storage layer includes a project file module, a specification data module, a model data module, a calculation process data module, and a user data module.

10. The system according to claim 7, characterized in that include: The database stores data extracted from the standard table for use in calling, traversing and querying at any time.

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