Method and system for calculating optimal transition temperature of thermochromic glass of office building
By establishing a simulation model of building performance of thermochromic glass and calculating the energy consumption per unit area under different transition temperatures, the problem of lack of transition temperature design method for thermochromic glass in office buildings is solved, and more efficient building energy saving effects are achieved.
Patent Information
- Application Number
- CN202510093357.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-21
- Publication Date
- 2025-05-13
AI Technical Summary
In office buildings, the lack of design methods for thermally discolored glass transition temperature leads to poor energy saving effects in buildings.
By collecting China's geographical and climate zone data, typical office parameters, glass type and physical performance parameters, a simulation model of building performance of thermochromic glass is established, building energy consumption per unit area under different transition temperatures is calculated, and the optimal transition temperature is compared to determine the optimal transition temperature.
It provides an easy-to-implement and widely applicable method to help architects determine the optimal transition temperature for thermochromic glass, thereby improving the energy-saving effect of the building.
Smart Images
Figure CN119989487A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of thermochromic glass application in buildings, and in particular to a method for calculating the optimum transition temperature of thermochromic glass in office buildings. Background Art
[0002] In the field of modern architecture, thermochromic glass has attracted much attention because it can change its solar radiation and visible light transmittance according to changes in ambient temperature, thereby achieving building energy conservation. However, when thermochromic glass is used in office buildings under different climatic conditions, different transition temperatures are key parameters affecting building energy conservation. Therefore, determining the optimal transition temperature of thermochromic glass in office buildings is the key to its design and application. Summary of the invention
[0003] The purpose of the present invention is to solve the problems existing in the background technology and propose a method for calculating the optimal transition temperature of thermochromic glass for office buildings. The optimal transition temperature calculation method of the present invention is easy to implement and has wide applicability, which helps to solve the problem that architects lack a method for designing the transition temperature of thermochromic glass in the process of designing office buildings.
[0004] The technical solution of the present invention is a method for calculating the optimal transition temperature of thermochromic glass for office buildings, comprising the following specific steps: S1. Collect data on China's geographical and climate zones, typical office parameters, glass types and physical performance parameters; S2. Establish a simulation model of thermochromic glass building performance for a typical office and verify the accuracy of the simulation model with measured data; S3. Calculate the building energy consumption per unit area at different transition temperatures of thermochromic glass; In step S3, the calculation expression of building energy consumption per unit area is:
[0005] Refrigeration energy consumption:
[0006] Heating energy consumption in severe cold areas and cold areas:
[0007] Heating energy consumption in hot summer and cold winter areas, hot summer and warm winter areas, and temperate areas:
[0008] Where EUI is the building energy consumption per unit area, is the lighting energy consumption, is the cooling energy consumption, For heating energy consumption, is the indoor area of the building; is the annual cumulative cooling energy consumption, is the annual cumulative heating energy consumption, is the coefficient of performance of the office building cooling system, which is 3.5; The comprehensive efficiency of the heating system using coal-fired boilers as heat source in severe cold and cold regions is 0.81; The comprehensive efficiency of the heating system using coal-fired boilers as the heat source in hot summer and cold winter areas, hot summer and warm winter areas, and temperate areas is 0.85; is the standard calorific value of coal, which is 8.14 kWh / kgce, is the conversion factor from electricity to standard coal, which is 0.33 kgce / kWh. is the standard calorific value of natural gas, which is 9.87 kWh / m 3 ; is the conversion factor between natural gas and coal, and its value is 1.21 kgce / m 3 ; S4. Compare the unit area building energy consumption of thermochromic glass at different transition temperatures, and determine the optimal transition temperature of thermochromic glass based on the minimum unit area building energy consumption.
[0009] Preferably, the geographical and climate zone data to be acquired in step S1 include five building climate zone data of China's severe cold regions, cold regions, hot summer and cold winter regions, hot summer and warm winter regions, and temperate regions.
[0010] Preferably, the typical office parameters collected in step S1 are: space dimensions and wall structure.
[0011] Preferably, the glass type and physical property parameters collected in step S1 include transition temperature, structural parameters, visible light transmittance, visible light reflectance, solar radiation transmittance and solar radiation reflectance.
[0012] Preferably, in step S4, the building energy consumption per unit area of the building simulation is batch calculated using EnergyPlus combined with Python Eppy.
[0013] A system for calculating the optimum transition temperature of thermochromic glass for office buildings uses the above method to calculate the optimum transition temperature of the thermochromic glass.
[0014] A computer device comprises a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above-mentioned method for calculating the optimal transition temperature of thermochromic glass of an office building when executing the computer program.
[0015] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the above-mentioned method for calculating the optimal transition temperature of thermochromic glass for office buildings.
[0016] Compared with the prior art, the present invention has the following beneficial technical effects: The present invention collects China's geographical and climate zone data, typical office parameters, glass types and physical performance parameters; establishes a thermochromic glass building performance simulation model for a typical office; calculates the unit area building energy consumption of the thermochromic glass at different transition temperatures; compares the unit area building energy consumption of the thermochromic glass at different transition temperatures, and determines the optimal transition temperature of the thermochromic glass with the minimum unit area building energy consumption.
[0017] The optimal transition temperature calculation method of the present invention has the characteristics of being easy to implement and having wide applicability, and is helpful to solve the problem that architectural designers lack a transition temperature design method for thermochromic glass during the office building design process. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is an operational flow chart for calculating the optimal transition temperature of thermochromic glass for office buildings in the present invention.
[0019] Figure 2 This is the office building simulation model of the present invention. Figure 2 a is a simulation diagram of the building structure model; Figure 2 b is a schematic diagram of the internal structure of the simulation model.
[0020] Figure 3 These are the renderings of the thermochromic glass for office buildings in the present invention at different transition temperatures.
[0021] Figure 4 It is the physical property parameter of the thermochromic glass in the present invention.
[0022] Figure 5 This is a verification diagram of the indoor air temperature in the thermochromic glass building simulation model of the present invention.
[0023] Figure 6 This is a verification diagram of the indoor illumination in the thermochromic glass building simulation model of the present invention. DETAILED DESCRIPTION
[0024] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention. Example
[0025] like Figure 1 As shown, the present invention proposes a method for calculating the optimal transition temperature of thermochromic glass for office buildings, comprising the following specific steps: 1. Collect data on China's geographical and climate zones, typical office parameters, glass types and physical performance parameters.
[0026] The geographical and climate zone data required in step 1 include the locations of the northern and southern regions of China, China's severe cold regions, cold regions, hot summer and cold winter regions, hot summer and warm winter regions, and five building climate zones in the temperate zone; Typical office parameters collected in step 1 are: a. Space size: 3.6m×8.2m×2.8m b. The wall structure is shown in Table 1 below: Table 1 Wall structures in five typical climate zones in China
[0027] The glass type and physical property parameters collected in step 1 include transition temperature, structural parameters, visible light transmittance, visible light reflectance, solar radiation transmittance, and solar radiation reflectance; 2. Use EnergyPlus to build a typical office building performance simulation model, such as Figure 2 As shown, using thermochromic glass with a transition temperature of 25°C (such as Figure 3 Physical performance parameters (such as Figure 4 The accuracy of the simulation model was verified by relative error, and the average relative error values (MRE) of the key model parameters: indoor air temperature and indoor illumination were both less than 15%, as shown in Figure 2. Figure 5 , Figure 6 As shown; In step 2, the mean relative error is used to verify the accuracy of the simulation model, and its calculation expression is:
[0028] In the formula is the mean relative error, and For each time interval, the measured and simulated values of indoor air temperature and lighting illumination are: for and The number of
[0029] 3. Select the calculation expression of unit area building energy consumption at different transition temperatures of thermochromic glass:
[0030] Refrigeration energy consumption:
[0031] Heating energy consumption in severe cold areas and cold areas:
[0032] Heating energy consumption in hot summer and cold winter areas, hot summer and warm winter areas, and temperate areas:
[0033] Where EUI is the building energy consumption per unit area, is the lighting energy consumption, is the cooling energy consumption, For heating energy consumption, is the indoor area of the building; is the annual cumulative cooling energy consumption, is the annual cumulative heating energy consumption, is the coefficient of performance of the office building cooling system, which is 3.5; The comprehensive efficiency of the heating system using coal-fired boilers as heat source in severe cold and cold regions is 0.81; The comprehensive efficiency of the heating system using coal-fired boilers as the heat source in hot summer and cold winter areas, hot summer and warm winter areas, and temperate areas is 0.85; is the standard calorific value of coal, which is 8.14 kWh / kgce, is the conversion factor from electricity to standard coal, which is 0.33 kgce / kWh. is the standard calorific value of natural gas, which is 9.87 kWh / m 3 ; is the conversion factor between natural gas and coal, and its value is 1.21 kgce / m 3 ; 4. Use Python Eppy to batch calculate the building energy consumption per unit area under different working conditions, specifically: apply thermochromic glass and Low-e double-layer glass with different transition temperatures to office buildings in four directions in each region, and compare the building energy consumption per unit area of different glass types, calculate the energy saving rate of thermochromic glass with different transition temperatures in office buildings in various regions, so as to determine the optimal transition temperature map in office buildings in different regions, which can provide a reference for architects when selecting thermochromic glass. This embodiment selects the calculation results of the optimal transition temperature of thermochromic glass in representative cities in five typical climate zones in China as a supplement, as shown in Table 2 below.
[0034] Table 2 Calculation results of the optimal transition temperature of thermochromic glass for five cities with typical climate in China
[0035] The present invention collects China's geographical and climate zone data, typical office parameters, glass types and physical performance parameters; establishes a thermochromic glass building performance simulation model for a typical office; calculates the unit area building energy consumption of the thermochromic glass at different transition temperatures; compares the unit area building energy consumption of the thermochromic glass at different transition temperatures, and determines the optimal transition temperature of the thermochromic glass.
[0036] The optimal transition temperature calculation method of the present invention has the characteristics of being easy to implement and having wide applicability, and is helpful to solve the problem that architectural designers lack a transition temperature design method for thermochromic glass during the office building design process.
[0037] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.
Claims
1. A method for calculating the optimal transition temperature of thermochromic glass for office buildings, characterized in that: The specific steps include: S1. Collect data on China's geographical and climate zones, typical office parameters, glass types and physical performance parameters; S2. Establish a simulation model of thermochromic glass building performance for a typical office and verify the accuracy of the simulation model with measured data; S3. Calculate the building energy consumption per unit area at different transition temperatures of thermochromic glass; S4. Compare the unit area building energy consumption of thermochromic glass at different transition temperatures, and determine the optimal transition temperature of thermochromic glass based on the minimum unit area building energy consumption.
2. The method for calculating the optimal transition temperature of thermochromic glass for office buildings according to claim 1, characterized in that: The geographical and climate zone data to be obtained in step S1 include five building climate zone data of China, namely, severe cold regions, cold regions, hot summer and cold winter regions, hot summer and warm winter regions, and temperate regions.
3. The method for calculating the optimal transition temperature of thermochromic glass for office buildings according to claim 1, characterized in that: The typical office parameters collected in step S1 are: space dimensions and wall structure.
4. The method for calculating the optimal transition temperature of thermochromic glass for office buildings according to claim 1, characterized in that: The glass type and physical property parameters collected in step S1 include transition temperature, structural parameters, visible light transmittance, visible light reflectance, solar radiation transmittance and solar radiation reflectance.
5. The method for calculating the optimal transition temperature of thermochromic glass for office buildings according to claim 1, characterized in that: In step S3, the calculation expression of building energy consumption per unit area is: ; Refrigeration energy consumption: ; Heating energy consumption in severe cold areas and cold areas: ; Heating energy consumption in hot summer and cold winter areas, hot summer and warm winter areas, and temperate areas: ; In the formula, EUI is the building energy consumption per unit area, is the lighting energy consumption, is the cooling energy consumption, For heating energy consumption, is the indoor area of the building; is the annual cumulative cooling energy consumption, is the annual cumulative heating energy consumption, is the coefficient of performance of the office building cooling system, which is 3.5; The comprehensive efficiency of the heating system using coal-fired boilers as heat source in severe cold and cold regions is 0.81; The comprehensive efficiency of the heating system using coal-fired boilers as the heat source in hot summer and cold winter areas, hot summer and warm winter areas, and temperate areas is 0.85; is the standard calorific value of coal, which is 8.14 kWh / kgce, is the conversion factor from electricity to standard coal, which is 0.33 kgce / kWh. is the standard calorific value of natural gas, which is 9.87 kWh / m 3 ; is the conversion factor between natural gas and coal, and its value is 1.21 kgce / m 3 .
6. The method for calculating the optimal transition temperature of thermochromic glass for office buildings according to claim 1, characterized in that: In step S4, the building energy consumption per unit area of the building simulation is batch calculated using EnergyPlus combined with Python Eppy.
7. A system for calculating the optimal transition temperature of thermochromic glass for office buildings, characterized in that: The optimum transition temperature of the thermochromic glass is calculated using the method described in any one of claims 1 to 5.
8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the method for calculating the optimal transition temperature of thermochromic glass for office buildings as described in any one of claims 1 to 5 when executing the computer program.
9. A computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the steps of the method for calculating the optimal transition temperature of thermochromic glass for office buildings according to any one of claims 1 to 5 are implemented.