Building heating and ventilation system forward design method and device based on PLM platform and storage medium

Abstract

The invention discloses a building heating and ventilation system forward design method and device based on a PLM platform and a storage medium. The method comprises the following steps that 1, a heating and ventilation professional series library is configured and maintained; 2) building a building design parameterized model, and building a building energy consumption analysis model; 3) based on the building energy consumption analysis model, calculating the building cooling and heating load, and storing a calculation result as a basis for equipment type selection; 4) selecting an electromechanical equipment combination with optimal energy consumption as an equipment type selection result; 5) creating a two-dimensional schematic diagram of each system; 6) driving the two-dimensional schematic diagram and the three-dimensional model; 7) adjusting the system simulation model based on the three-dimensional model; 8) carrying out three-dimensional deepening design; 9) performing joint simulation based on CFD and a system simulation model; 10) performing three-dimensional marking and three-dimensional delivery; and 11) establishing a later operation and maintenance model based on the three-dimensional deepening model, and carrying out semi-physical simulation operation and maintenance. According to the design method, the efficiency, accuracy and intuition of heating and ventilation design are improved.

Description

Technical Field

[0001] The present invention relates to building electromechanical design technology, and in particular to a forward design method, device and storage medium for a building HVAC system based on a PLM platform. Background Art

[0002] At present, the application and development stage of BIM (Building Information Modeling) technology in my country is relatively simple. BIM models are generally used as auxiliary drawing tools for display and communication or as a mold-making tool, that is, the traditional "preliminary design-molding-model optimization and deepening-construction guidance" model. The current application status of BIM technology in HVAC is to make molds based on two-dimensional drawings, then conduct pipeline integration, and finally output two-dimensional drawings to guide construction. This form of work has greatly increased the workload of BIM designers. The main reasons are: 1) The results of two-dimensional design cannot be effectively transferred to three-dimensional design; 2) The three-dimensional design results are not directly used for construction, and the conversion of three-dimensional to two-dimensional increases the workload.

[0003] The existing reverse BIM technology cannot reduce production costs and bring economic benefits in a practical sense. On the contrary, it will increase cost investment, greatly limiting its application and promotion in my country. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a forward design method, device and storage medium for a building HVAC system based on a PLM platform in view of the defects in the prior art.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a forward design method for a building HVAC system based on a PLM platform, comprising the following steps:

[0006] 1) Configure and maintain HVAC professional series libraries, including Modelica equipment library, 2D schematic library, and 3D pipeline, accessories and equipment library;

[0007] 2) Based on the Rhino and Grasshopper platforms, a parametric model of architectural design is established, and a complete building energy consumption analysis model is established based on the parametric model of architectural design;

[0008] 3) Based on the building energy consumption analysis model, calculate the building's cooling and heating loads, predict the building's peak loads, and save the calculation results as the basis for equipment selection;

[0009] 4) In the PLM platform, based on the system simulation method and the calculation results of the cooling and heating loads, the electromechanical equipment is combined in the Modelica equipment library, and the electromechanical equipment combination with the best energy consumption when the peak load meets the standard is selected as the equipment selection result;

[0010] 5) Create two-dimensional schematic diagrams of each system of HVAC specialty based on the equipment selection results;

[0011] According to the results of equipment selection, determine that all components are included in the 2D schematic library. When the main HVAC equipment is determined, design the HVAC system to obtain the 2D schematics of each system, and check the system logic through the schematic checking function;

[0012] In the PLM platform, a system simulation model is generated based on the two-dimensional schematic diagram, and the schematic diagram is verified and optimized using the generated system simulation model;

[0013] 6) Drive 2D schematics and 3D models by adding implementation relationships;

[0014] Establish corresponding implementation relationships between 2D schematic nodes and physical model nodes, associate the equipment model in the 2D schematic with the 3D equipment model through predefined parts, synchronize the equipment model in the 3D model node through the synchronization function, and then place the 3D model of the equipment in the equipment selection result in the building space at a suitable position by adjusting the equipment position to complete the equipment layout;

[0015] Place the 3D model of the equipment in the equipment selection results at a suitable location in the building space, add a link relationship to the 3D equipment model based on the link between the equipment pipeline wiring and pipe accessories in the 2D schematic diagram, and make a 2D and 3D correspondence to ensure the consistency of the 3D model with the schematic diagram;

[0016] 7) Adjust the system simulation model based on the three-dimensional model;

[0017] 8) 3D deepening; perform terminal design and 3D deepening design

[0018] Establish HVAC and electromechanical 3D detailed model based on PLM platform to improve modeling accuracy;

[0019] 9) Joint simulation based on CFD and system simulation model;

[0020] 10) 3D annotation and 3D delivery;

[0021] 3D annotation and 3D delivery based on 3D detailed models;

[0022] 11) Establish a post-operation and maintenance model based on the 3D deepening model to carry out semi-physical simulation operation and maintenance.

[0023] In the PLM platform, the post-operation and maintenance model is simplified based on the HVAC and electromechanical three-dimensional in-depth model, and semi-physical simulation operation and maintenance is performed. Semi-physical simulation operation and maintenance is to simulate the system based on the measured data of sensors to predict the operation status of equipment, and introduce reinforcement learning methods to achieve real-time simulation and semi-physical simulation operation and maintenance.

[0024] The present invention also provides an electronic device, comprising: one or more processors; and

[0025] A storage device is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors execute the method described in any one of the above technical solutions.

[0026] The present invention also provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the method described in the above technical solution when executed by a processor.

[0027] The beneficial effects produced by the present invention are:

[0028] The present invention proposes a forward design method for a building HVAC system based on a PLM platform. Starting from the building HVAC demand, a HVAC two-dimensional schematic diagram is established, and a three-dimensional model is created based on the two-dimensional schematic diagram. At the same time, the two-dimensional schematic diagram is updated based on the three-dimensional deepening model and joint simulation, so as to realize the effective transmission of two-dimensional and three-dimensional data. The three-dimensional deepening model can directly and effectively guide the construction through three-dimensional annotation and three-dimensional delivery, and the design based on the schematic diagram can be effectively used for later operation and maintenance, realizing the complete design process of HVAC profession from demand to operation and maintenance, and improving the efficiency, accuracy and intuitiveness of HVAC design. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0030] Figure 1 It is a flow chart of a method according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] like Figure 1 As shown, a forward design method for a building HVAC system based on a PLM platform includes the following steps:

[0033] 1) In the early stage of design, configure and maintain the HVAC professional series library, which includes Modelica equipment library, 2D schematic library, and 3D pipeline, accessories and equipment library;

[0034] 2) Based on the Rhino and Grasshopper platforms, a parametric model of architectural design is established, and a complete building energy consumption analysis model is established based on the parametric model of architectural design;

[0035] Based on the Rhino and Grasshopper platforms, a parametric model is established to set the building orientation, enclosure structure parameters, window-to-wall ratio, shading facilities, etc., so that the architectural design process is based on data. The architectural design can be quickly adjusted and modified during the scheme modification stage, and the modification results can be directly obtained through parameter modification, which effectively improves the modeling efficiency.

[0036] 3) Based on the building energy consumption analysis model, calculate the building's cooling and heating loads, predict the building's peak loads, and save the calculation results as the basis for equipment selection;

[0037] Based on the Ladybug Tools building physics analysis plug-in, a building energy consumption analysis model is established, taking into account solar radiation heat, indoor personnel metabolism heat, indoor equipment infrared radiation heat, etc., and setting the outdoor meteorological parameters, indoor personnel activities and indoor equipment operation conditions, and then selecting the HVAC system type, and setting the air conditioning system parameters and operation time.

[0038] Based on the energy consumption simulation analysis software (EnergyPlus, OpenStudio, etc.), the building's annual cooling and heating load calculations are carried out to obtain the building's annual cooling and heating load change curves, and multiple HVAC system schemes are compared to reduce the building's annual operating energy consumption.

[0039] 4) In the PLM platform, based on the system simulation method, according to the calculation results of the cooling and heating loads, the electromechanical equipment in the Modelica equipment library is combined, and the electromechanical equipment combination scheme with the optimal energy consumption when the peak load meets the standard is selected as the equipment selection result; in this way, the required HVAC equipment model and specifications can be determined.

[0040] 5) Create two-dimensional schematic diagrams of each system of HVAC specialty based on the equipment selection results;

[0041] According to the results of equipment selection, determine that all components are included in the 2D schematic library. When the main HVAC equipment is determined, design the HVAC system to obtain the 2D schematic diagram of each system, and check the system logic through the logic check function of the schematic diagram; and produce the corresponding equipment list and report;

[0042] In this embodiment, according to the different drawing requirements of the project, a system schematic diagram frame and a legend are established, and a corresponding equipment list and report are generated to facilitate statistics;

[0043] Generate a system simulation model based on the two-dimensional schematic diagram, and use the generated system simulation model to verify and optimize the schematic diagram;

[0044] The optimization process is based on the system simulation model to simulate and predict the air volume of each air outlet of the HVAC system, the operating status of each air handling unit at different times, and make adjustments and optimizations based on the simulation results.

[0045] In the preliminary design stage, the parameters of system simulation are derived from the system schematic diagram. The purpose of system simulation is to verify the rationality of the system schematic design, not the specific design details of the pipeline.

[0046] 6) Drive 2D schematics and 3D models by adding implementation relationships;

[0047] Establish corresponding implementation relationships between 2D schematic nodes and physical model nodes, associate the equipment model in the 2D schematic with the 3D equipment model through predefined parts, synchronize the equipment model in the 3D model node through the synchronization function, and then place the 3D model of the equipment in the equipment selection result in the building space at a suitable position by adjusting the equipment position to complete the equipment layout;

[0048] Place the 3D model of the equipment in the equipment selection results at a suitable location in the building space, add a link relationship to the 3D equipment model based on the link between the equipment pipeline wiring and pipe accessories in the 2D schematic diagram, and make a 2D and 3D correspondence to ensure the consistency of the 3D model with the schematic diagram;

[0049] In the PLM platform, by configuring resource tables and working in conjunction with each other, professional resource sets are established to build the underlying design environment of the fluid system. The HVAC system design environment construction mainly includes the establishment of pipeline / pipeline specification resource sets, HVAC specification resource sets and other resource sets. The pipeline / pipeline specification resource set mainly includes: water supply and drainage pipeline specification resources, water supply and drainage parts subtype table, water supply and drainage logic parts subtype table, water supply and drainage mapping parts subtype table, water supply and drainage material table, etc. The HVAC specification resource set includes: HVAC specification table, HVAC parts subtype table, HVAC logic parts subtype table, HVAC mapping parts subtype table, etc.

[0050] For electromechanical equipment, the physical part subtype corresponds to the type of the three-dimensional model, and the logical part subtype corresponds to the component type in the two-dimensional schematic. By mapping the part subtype table, the three-dimensional model can be matched with the two-dimensional schematic.

[0051] 7) Adjust and update the system simulation model based on the three-dimensional model;

[0052] Adjusting the system simulation model includes debugging and verification of the system simulation model, including verification of electromechanical pipe fittings, verification of electromechanical equipment and verification of control systems.

[0053] The verification of electromechanical pipe fittings is mainly to verify the accuracy of the one-dimensional fluid calculation model of the pipeline. In the 3Dexperience platform, the one-dimensional fluid calculation of electromechanical pipelines using the system simulation model is mainly achieved by writing the CATIAPiping library based on the Modelica language. The CATIAPiping library is a model library based on the Modelica language developed by Dassault Systems for the two-dimensional and three-dimensional mapping of pipelines. It is suitable for pipeline system design and system simulation, and can realize the mapping from the three-dimensional model to the system simulation model, and the mapping from the two-dimensional schematic diagram to the one-dimensional simulation model. The model library contains various components of the pipeline system.

[0054] When calculating the pipeline, it is assumed that the water moves in a laminar flow in the pipeline, and considering the viscosity, the equation adopts the Hagen-Poiseuille formula, that is, the volume flow rate of a viscous fluid that moves in a laminar flow in a horizontal capillary tube of equal cross-section is proportional to the pressure difference ΔP at both ends of the tube, that is:

[0055]

[0056] In the formula, Q represents the volume flow rate of the water body, R represents the pipe radius, ΔP represents the pressure difference, η represents the viscosity coefficient of the fluid, and L represents the length of the pipeline.

[0057] The following equation is used to calculate the water loss caused by friction in the pipeline. Since the friction coefficient depends on the Reynolds number of the flow rate, the Reynolds number depends on the flow rate, and the flow rate depends on the flow rate, the friction coefficient equation is as follows:

[0058]

[0059] Where f represents the friction coefficient, ε represents the wall roughness of the inner wall of the pipe, D represents the pipe diameter, and Re represents the Reynolds coefficient.

[0060] When applying the system simulation model for verification, you can refer to standards, theories, and measured data. Calculate the resistance loss along the pipeline of different materials and compare it with the empirical coefficient. Simulate and verify the local head loss and flow distribution of pipe accessories such as elbows, tees, crosses, valves, etc.

[0061] When verifying electromechanical equipment, it is necessary to consider the working status of the internal components of the electromechanical equipment and The system The simulation results are compared and verified with the working curve of the equipment.

[0062] When verifying the control system, it is necessary to combine the actual equipment, the working logic of the control system and the specific system simulation model to design it. Ensure that the control system has a control effect on the system simulation model that is consistent with the actual operating state, and avoid control logic that exceeds the control range of the actual equipment.

[0063] At this point, there is a specific three-dimensional construction drawing model. The system simulation at this time can obtain the three-dimensional spatial position of the pipeline as well as parameter information such as length, height, material, etc. The simulation accuracy of the system simulation at this time can guide the pipeline routing and optimize the pipeline layout.

[0064] 8) Three-dimensional deepening;

[0065] Based on the PLM platform, a three-dimensional HVAC and electromechanical model is established for three-dimensional in-depth design to improve modeling accuracy;

[0066] 9) Joint simulation based on CFD and system simulation model;

[0067] Based on the 3D deepening model and joint simulation, the 2D schematic diagram can be updated to achieve effective transmission of 2D and 3D data; in the model deepening stage, the 3D model at this time has details such as local bending and avoidance, and the accuracy of the system simulation model can meet the requirements of virtual commissioning. In the system simulation model, by adjusting the air valve opening of each air duct branch, the thermal environment of the entire room can be adjusted to avoid overcooling or overheating in some spaces.

[0068] Transient prediction and optimization of building space fluid based on CFD;

[0069] The introduction of CFD (computational fluid dynamics) methods can effectively predict and evaluate the fluid in building spaces. LBM (Lattice Boltzmann Method) can save a lot of CFD pre-processing work, and can also perform joint simulation with system simulation based on FMI / FMU (Functional Mock-up Interface).

[0070] LBM uses the Boltzmann transport equation to solve some of the problems encountered by the Navier-Stokes equations and LGA (lattice gas automaton method). The Boltzmann transport equation is defined as follows:

[0071]

[0072] where f i represents the distribution function at position i, Represents its corresponding collision operator. Based on this equation, the compressible NS equations can be solved through the Chanpman-Enskog expansion. The definition of the collision operator is shown in the following formula:

[0073]

[0074] where f i eq is the local equilibrium constant, and τ is the characteristic relaxation time (related to the macroscopic viscosity).

[0075] Based on the CFD method, the thermal environment of indoor buildings can be numerically simulated. At the same time, combined with the control method of system simulation, it is possible to calculate the transient prediction and optimization of complex fluid flows in large spaces.

[0076] 10) 3D annotation and 3D delivery;

[0077] 3D annotation and 3D delivery based on 3D detailed models;

[0078] Reorganize the 3D detailed model and define prefabricated parts nodes for manufacturing and construction.

[0079] 3D annotation of 3D detailed models, including component dimension annotation, positioning information annotation, processing information annotation, etc.

[0080] The 3D detailed model is delivered in 3D, and the manufacturing and construction information of the building information model is transmitted to the downstream in the form of electronic atlas, realizing delivery without drawings and avoiding problems such as misunderstanding caused by using traditional 2D drawings to transmit information.

[0081] 11) Post-production semi-physical simulation operation and maintenance.

[0082] In the PLM platform, since the amount of high-precision 3D model data is too large, it is necessary to simplify it based on the HVAC and electromechanical 3D in-depth model, and establish a later operation and maintenance model for semi-physical simulation operation and maintenance. The system simulation is simulated and predicted based on the actual measured data of the sensor, and the reinforcement learning method is introduced to realize real-time simulation and semi-physical simulation operation and maintenance.

[0083] The present invention proposes a forward design method for a building HVAC system based on a PLM platform. The invention provides a forward design method for a building HVAC system in a PLM platform (full life cycle management platform). Starting from the building HVAC energy consumption demand, a two-dimensional HVAC schematic diagram is established, and then a three-dimensional model is created based on the two-dimensional schematic diagram. At the same time, the two-dimensional schematic diagram is updated based on the three-dimensional deepening model and joint simulation to achieve effective transmission of two- and three-dimensional data. The three-dimensional deepening model can directly and effectively guide construction through three-dimensional annotation and three-dimensional delivery, and the design based on the schematic diagram can be effectively used for later operation and maintenance. A complete design process of HVAC from demand to operation and maintenance is realized, which improves the efficiency, accuracy and intuitiveness of HVAC design.

[0084] A specific embodiment

[0085] The design scope of HVAC includes: air conditioning system design, ventilation system design, smoke and exhaust system design, energy-saving design, environmental protection and sanitation and epidemic prevention design, etc. The embodiment of the present invention takes the air conditioning system design of Zhongxiang Science and Technology Museum as an example to illustrate the HVAC forward design.

[0086] The form of air conditioning needs to be determined by referring to the requirements of Party A and the use requirements and characteristics of each air-conditioned room and space. For the specific implementation of this project, this project adopts a centralized water-air central air conditioning system. Based on the principles of economy, reliability, advancement, applicability, energy saving and environmental protection, the air conditioning cold and heat source adopts an integrated double-cooling high-efficiency chilled water (heat pump) unit for cooling in summer and heating in winter.

[0087] 1) When calculating the air conditioning load, the building cooling and heating load is calculated based on outdoor meteorological parameters and building models, taking into account solar radiation heat gain, indoor human activity metabolism heat gain, and equipment infrared radiation heat gain. The BIM model of Zhongxiang Science and Technology Museum is imported into Rhino software, and a building parametric model is established in Rhino based on the Grasshopper platform. A building energy consumption analysis model is established based on the Ladybug Tools building physics analysis plug-in. The peak load of the science and technology museum is reduced by adjusting the building design parameters, and the HVAC equipment processing capacity that meets the building peak load is estimated to avoid the increase in operating costs caused by equipment redundancy.

[0088] The building energy consumption simulation analysis is conducted based on energy consumption simulation analysis software (EnergyPlus, OpenStudio, etc.), and the HVAC system schemes are compared based on multiple schemes. The summer air conditioning cooling load is the maximum comprehensive hourly cooling load of each air conditioning area, and the winter air conditioning heat load is the cumulative value of the heat load of the service area. Considering the load characteristics of each unit, the load simultaneous use coefficient of the centralized air conditioning cold and heat source system is 0.95. After calculation, the summer air conditioning cooling load of the centralized air conditioning cold and heat source system is 4823kW, and the winter air conditioning heat load is 2847kW.

[0089] 2) Based on the load calculation results, different types of HVAC equipment are selected and installed according to the different total cold and heat source processing capacities required by the building, and multiple schemes are compared in the Dymola software. In an embodiment of the present invention, three integrated dual-cooling and high-efficiency chillers (heat pumps) are used for equipment selection. The return water temperature of air-conditioning cold water is 7 / 13°C in summer, and the return water temperature of air-conditioning hot water is 45 / 40°C in winter. The nominal operating cooling capacity of each integrated dual-cooling and high-efficiency chiller (heat pump) unit is 1706kW, and the heating capacity is 1275kW. The design operating cooling capacity is 1648kW, and the heating capacity is 960kW.

[0090] 3) Based on the results of Dymola equipment selection, HVAC designers quickly build system schematics by calling components in the schematic library. For the Zhongxiang Science and Technology Museum, it is mainly necessary to draw schematics of various HVAC systems such as the central air conditioning cold and hot source water system schematic, the science and technology museum air conditioning terminal water system schematic, and the science and technology museum smoke exhaust system principle.

[0091] Construction drawing stage

[0092] 4) Based on the 3DE platform, the building HVAC system can be designed and modeled in 3D in Piping&Tubing 3D Design APP and HVAC 3D Design. The 3D model can be checked in real time in the form of "display logic diagram".

[0093] The electromechanical piping system mainly includes HVAC ducts, water supply and drainage pipelines, cable trays, and various professional pipe accessories and equipment. In the deepening stage, it is necessary to establish high-precision models of computer room equipment and various professional piping systems, and conduct comprehensive piping design and support and hanger design. Furthermore, when deepening the equipment, it is necessary to comprehensively consider the spatial coordination relationship with the civil engineering model, meet the net height requirements of the functional room, reasonably determine the installation location of the equipment, and the type of support and hanger, etc., and use the efficient and collaborative characteristics of the PLM platform to deal with the coordination and collision problems of multi-professional pipelines, and determine a reasonable comprehensive pipeline layout plan.

[0094] 5) Based on CFD simulation technology, the indoor cooling and heating sources of the large space area of ​​the project are simulated, and the air valve opening is adjusted to debug in the model to avoid the risk of on-site rework.

[0095] 6) Generate a system simulation model based on the 3D model to perform hydraulic calculations on the pipeline, verify the hydraulic calculations of the pipeline, and pre-debug the equipment and pipeline directions.

[0096] After completing the in-depth design on the PLM platform, it is necessary to split the professional pipelines in combination with the processing and construction processes, and design joint supports and hangers to hoist and fix the air ducts, water pipes, bridge frames, etc. as a whole.

[0097] After the HVAC in-depth model is established, a functional model of corresponding accuracy is generated according to different needs such as delivery, simulation, operation and maintenance.

[0098] Delivery and construction phase

[0099] 7) Perform 3D annotation and 3D delivery based on the 3D in-depth HVAC model. Reorganize the 3D in-depth HVAC model and define the prefabricated nodes for manufacturing and construction. Perform 3D annotation based on the 3D in-depth HVAC model, including component dimension annotation, positioning information annotation, processing information annotation, etc.;

[0100] The mechanical, electrical and HVAC professional models are delivered in three dimensions, and the manufacturing and construction information of the HVAC models are transmitted to the downstream in the form of electronic atlases without drawings, avoiding problems such as misunderstanding caused by using traditional two-dimensional drawings to transmit information.

[0101] In the operation and maintenance stage

[0102] 8) In the PLM platform, generate HVAC operation and maintenance models from 3D in-depth models. Based on the sensor, the HVAC electromechanical 3D in-depth model needs to be simplified, and the later model is established for semi-physical simulation operation and maintenance. The system simulation is simulated and predicted based on the actual measured data of the sensor, and the reinforcement learning method is introduced to realize real-time simulation and semi-physical simulation operation and maintenance.

[0103] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A forward design method for building HVAC system based on PLM platform, characterized in that: The following steps are involved: 1) Configure and maintain HVAC professional series libraries, including Modelica equipment library, 2D schematic library, and 3D pipeline, accessories and equipment library; 2) Based on the Rhino and Grasshopper platforms, establish a parametric model of architectural design, and establish a building energy consumption analysis model based on the parametric model of architectural design; 3) Based on the building energy consumption analysis model, calculate the building's cooling and heating loads, predict the building's peak loads, and save the calculation results as the basis for equipment selection; 4) In the PLM platform, based on the system simulation method and the calculation results of the cooling and heating loads, the electromechanical equipment is combined in the Modelica equipment library, and the electromechanical equipment combination with the best energy consumption when the peak load meets the standard is selected as the equipment selection result; 5) Create two-dimensional schematic diagrams of each system of HVAC specialty based on the equipment selection results; Generate a system simulation model based on the two-dimensional schematic diagram, and use the generated system simulation model to verify and optimize the schematic diagram; 6) Drive 2D schematics and 3D models by adding implementation relationships; Place the 3D model of the equipment in the equipment selection results at a suitable location in the building space, add link relationships to the 3D equipment model based on the links of the 2D schematic equipment components, and make 2D and 3D correspondence to ensure the consistency of the 3D model and the schematic; 7) Adjust the system simulation model based on the three-dimensional model; 8) Establish HVAC and electromechanical 3D detailed model based on PLM platform for 3D detailed design; 9) Joint simulation based on CFD and system simulation model; 10) 3D annotation and 3D delivery; 3D annotation and 3D delivery based on 3D detailed models; 11) Establish a post-operation and maintenance model based on the 3D deepening model to carry out semi-physical simulation operation and maintenance.

2. The forward design method for building HVAC system based on PLM platform according to claim 1 is characterized in that: In the step 5), a two-dimensional schematic diagram of each system of the HVAC specialty is created according to the equipment selection results; the details are as follows: According to the results of equipment selection, it is determined that all components are included in the two-dimensional schematic library. When the main HVAC equipment is determined, the HVAC system is designed to obtain the two-dimensional schematics of each system, and the system logic is checked through the schematic inspection function.

3. The forward design method for building HVAC system based on PLM platform according to claim 1 is characterized in that: The step 6) drives the two-dimensional schematic diagram and the three-dimensional model by adding an implementation relationship; specifically, as follows: Establish corresponding implementation relationships between 2D schematic nodes and physical model nodes, associate the equipment model in the 2D schematic with the 3D equipment model through predefined parts, synchronize the equipment model in the 3D model node through the synchronization function, and then place the 3D model of the equipment in the equipment selection result in the building space at a suitable position by adjusting the equipment position to complete the equipment layout; Place the 3D model of the equipment in the equipment selection results at an appropriate location in the building space. Add a link relationship to the 3D equipment model based on the link between the equipment pipeline wiring and pipe accessories in the 2D schematic diagram to make a 2D and 3D correspondence to ensure the consistency of the 3D model with the schematic diagram.

4. The forward design method for building HVAC system based on PLM platform according to claim 1 is characterized in that: In the step 7), adjusting the system simulation model based on the three-dimensional model includes verification and debugging of the system simulation model: verification of electromechanical pipe fittings, verification of electromechanical equipment and verification of the control system.

5. The forward design method for building HVAC system based on PLM platform according to claim 1 is characterized in that: In the step 9), the two-dimensional schematic diagram is updated based on the three-dimensional deepening model and the joint simulation to achieve effective transmission of two-dimensional and three-dimensional data.

6. The forward design method for building HVAC system based on PLM platform according to claim 1 is characterized in that: In the step 9), transient prediction and optimization of the fluid in the building space is performed based on CFD, specifically: numerical simulation of the indoor building thermal environment is performed based on the CFD method, and at the same time, combined with the control method of system simulation, transient prediction and optimization of complex fluid flow in large spaces are performed.

7. The forward design method for building HVAC system based on PLM platform according to claim 1 is characterized in that: In the step 10), the three-dimensional deepening model is three-dimensionally annotated, including component dimension annotation, positioning information annotation, and processing information annotation; The 3D detailed model is delivered in 3D, and the manufacturing and construction information of the building information model is transmitted to the downstream in the form of electronic atlas, realizing delivery without drawings.

8. The forward design method for building HVAC system based on PLM platform according to claim 1 is characterized in that: In the step 11), In the PLM platform, the post-operation and maintenance model is simplified based on the HVAC and electromechanical three-dimensional in-depth model, and semi-physical simulation operation and maintenance is performed. Semi-physical simulation operation and maintenance is to simulate the system based on the measured data of sensors to predict the operation status of equipment, and introduce reinforcement learning methods to achieve real-time simulation and semi-physical simulation operation and maintenance.

9. An electronic device, characterized in that: include: one or more processors; as well as a storage device for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors are caused to perform the method according to any one of claims 1 to 8.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method according to any one of claims 1 to 8 is implemented.

Images