Method for calculating dynamic lighting and illumination energy consumption of building function space in scheme design stage
By dynamically calculating the lighting area and lighting system energy consumption of the building functional space, the energy consumption evaluation problem in the solution design stage is solved, and the low-carbon optimization design of the building lighting system is realized.
Patent Information
- Application Number
- CN202510650240.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-20
- Publication Date
- 2025-08-29
Smart Images
Figure CN120562017A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of building energy conservation, and in particular to a method for calculating the dynamic lighting energy consumption of a building functional space in a scheme design stage. Background Art
[0002] In the field of architectural lighting environment design, fully utilizing natural light to achieve lighting energy savings is crucial. During the conceptual design phase, due to a lack of sufficient design information, key parameters such as the area and duration of natural light utilization cannot be accurately determined, resulting in rough estimates using default values. This situation changes during the schematic design phase. With the clear definition of functional spaces, BIM (Building Information Modeling) technology allows for precise determination of key design information that influences natural light, such as the three-dimensional dimensions of each functional space, the location, height, and dimensions of doors and windows, and other key design information. This provides a solid foundation and conditions for dynamic lighting energy consumption calculations for natural light during the schematic design phase. However, traditional lighting energy consumption calculation methods are mostly static, focusing primarily on the impact of lighting fixture power and operating time on energy consumption, while rarely considering the specific impact of building design parameters and lighting system design parameters on overall energy consumption. This limitation makes it difficult for designers to effectively compare and optimize low-carbon design options by adjusting relevant design parameters during the schematic design phase.
[0003] In view of this, we propose a method to calculate the dynamic lighting energy consumption of building functional spaces in the scheme design stage. Summary of the Invention
[0004] The purpose of the present invention is to provide a method for calculating the dynamic lighting energy consumption of building functional spaces in the scheme design stage to solve the problems raised in the above background technology.
[0005] To achieve the above object, the present invention provides the following technical solutions:
[0006] A method for calculating dynamic daylighting energy consumption of building functional spaces during the scheme design phase includes the following steps:
[0007] S1: Extract building functional space parameters, including: three-dimensional space size parameters, window opening parameters and working surface height h2;
[0008] S2: Dynamic lighting area calculation:
[0009] The dynamic lighting area is related to the location, size, type of the exterior window and the height of the work surface, and is calculated using formula (1):
[0010]
[0011] Among them, S DL,iThe area of natural lighting designed for the i-th functional space, unit: m 2 ;L DL,i is the depth of the designed natural lighting area of the i-th functional space, in meters; W DL,i W is the width of the designed natural lighting area of the i-th functional space, in meters; W,i is the width of the window of the i-th functional space, in m;
[0012] S3: Lighting system energy consumption calculation
[0013] The energy consumption of the functional space lighting system includes: the lighting energy consumption of the functional space, the lighting emergency system energy consumption and the lighting control system standby energy consumption. The energy consumption of the lighting system is calculated using formula (2):
[0014] E s,l,i =E s,l,i,Lig +E s,l,i,Emg +E s,l,i,Stby (2)
[0015] Among them, E s,l,i is the annual energy consumption of the lighting system of the i-th functional space, in kWh / a; E s,l,i,Lig is the annual energy consumption of lighting in the i-th functional space, in kWh / a; E s,l,i,Emg E is the annual energy consumption of the lighting emergency system in the i-th functional space, in kWh / a; s,l,i,Stby is the annual standby energy consumption of the lighting control system of the i-th functional space, in kWh / a.
[0016] Preferably, the window hole parameters are window hole position, size, and type.
[0017] Preferably, in step S2, when the window is a side window, the depth of the natural lighting area is calculated using formula (3):
[0018] L DL,i,S =2.5×(h 1,i -h 2,i ) (3)
[0019] Among them, L DL,i,s is the depth of the designed natural lighting area of the i-th functional space when the window form is a side window, m; h 1,i is the height of the top of the window of the i-th functional space, m; g 2,i is the height of the working surface of the i-th functional space, m.
[0020] Preferably, in step S2, when the window is a skylight, the depth of the natural lighting area is calculated using formula (4):
[0021] L DL,i,R =2.0×(h3,i -h 2,i ) (4)
[0022] Among them, L DL,i,R is the depth of the designed natural lighting area of the i-th functional space when the window opening form is side skylight, m; h 3,i is the height of the ceiling where the skylight of the i-th functional space is located, in m.
[0023] Preferably, in step S3, the annual energy consumption of lighting in the i-th functional space is calculated using formula (5):
[0024]
[0025] Among them, P l,i is the power density of the lighting fixtures in the i-th functional space, in W / m 2 ;S DL,i The area of natural lighting designed for the i-th functional space, unit: m 2 ;S NDL,i The area of the i-th functional space that is not designed for natural lighting, unit: m 2 ;t eff,day,DL,i Design the annual daytime effective lighting operation time of natural lighting for the i-th functional space; t eff,day,NDL,i is the annual daytime effective lighting operation time of the i-th functional space without natural lighting design; t eff,night,i is the annual effective nighttime lighting time of the i-th functional space.
[0026] Preferably, the area of the region where natural lighting is not designed for the i-th functional space is calculated using formula (6):
[0027] S NDL,i =S i -S DL,i (6).
[0028] Preferably, the annual daytime effective lighting operation time of the natural lighting designed for the i-th functional space is calculated using formula (7):
[0029] t eff,day,DL,i =t day,i ×F DL,i ×F OCC,i (7)
[0030] Among them, t day,i F is the theoretical value of the annual daytime lighting operation time of the i-th functional space, unit: h / a; DL,i is the daylight collection coefficient of the i-th functional space; F OCC,i is the personnel control coefficient of the i-th functional space;
[0031] The annual daytime effective lighting operation time of the i-th functional space without natural lighting is calculated using formula (8):
[0032] t eff,day,NDL,i =t day,i ×F OCC,i (8)
[0033] The annual effective nighttime lighting time of the i-th functional space is calculated using formula (9):
[0034] t eff,night,i =t night,i ×F OCC,i (9)
[0035] Among them, t night,i It is the theoretical value of annual nighttime lighting operation time of the i-th functional space, calculated based on the local sunrise and sunset times, in units of h / a.
[0036] Preferably, the daylight collection coefficient of the i-th functional space is calculated using formula (10):
[0037] F DL,i =1-F DL,sup,i ×F DL,ctrl,i (10)
[0038] Among them, F DL,sup,i is the daylight supply coefficient of the i-th functional space; F DL,ctrl,i is the daylight control system coefficient of the i-th functional space;
[0039] The personnel control coefficient of the i-th functional space is calculated using formula (11):
[0040] F OCC,i =1-F A,i ×F OCC,ctrl,i (11)
[0041] Among them, F A,i is the staff absence coefficient of the i-th functional space; F OCC,ctrl,i is the coefficient of the personnel sensing control system of the i-th functional space.
[0042] Preferably, the daylight supply coefficient of the i-th functional space is calculated using formula (12):
[0043] F DL,sup,i =0.169ln(D i )+1.289 (12)
[0044] Where D is the daylighting coefficient of the i-th functional space.
[0045] Compared with the existing technology, the beneficial effect of the present invention is that this method can not only comprehensively design the basic energy consumption factors of lighting fixtures, but also highlight the comprehensive impact of building design parameters and lighting system design parameters on energy consumption, thereby providing designers with more scientific and flexible tools to help achieve low-carbon optimization design of building lighting systems. BRIEF DESCRIPTION OF THE DRAWINGS
[0046] Figure 1 Calculation flow chart for the scheme of the present invention;
[0047] Figure 2 This is a schematic diagram of the functional space in the present invention utilizing natural lighting through side windows;
[0048] Figure 3 This is a schematic diagram of utilizing skylights for natural lighting in the functional space of the present invention. DETAILED DESCRIPTION
[0049] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.
[0051] In the description of this patent, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," and "set" should be understood in a broad sense. For example, they can refer to fixed connection or set, detachable connection or set, or integral connection or set. Those skilled in the art will understand the specific meanings of the above terms in this patent based on the specific circumstances.
[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "several" means two or more, unless otherwise specifically defined.
[0053] The method for calculating the energy consumption of dynamic lighting in building functional spaces during the design phase provided by this invention can be found in Figure 1 As shown, the calculation method includes the following steps:
[0054] S1: Extracting building functional space parameters, including: 3D space size parameters, window opening parameters, and work surface height h2. The window opening parameters include the location, size, and type of the window opening; the 3D space size parameters include the ceiling height h1, the length L, width W, and height H of the space.
[0055] S2: Dynamic lighting area calculation:
[0056] The dynamic lighting area is related to the location, size, type of the window opening and the height of the working surface, and is calculated using formula (1):
[0057]
[0058] Among them, S DL,i The area of natural lighting designed for the i-th functional space, unit: m 2 ;L DL,i is the depth of the designed natural lighting area of the i-th functional space, in meters; W DL,i W is the width of the designed natural lighting area of the i-th functional space, in meters; W,i is the width of the window of the i-th functional space, in meters.
[0059] S3: Calculation of lighting system energy consumption:
[0060] The energy consumption of the functional space lighting system includes: the lighting energy consumption of the functional space, the lighting emergency system energy consumption and the lighting control system standby energy consumption. The energy consumption of the lighting system is calculated using formula (2):
[0061] E s,l,i =E s,l,i,Lig +E s,l,i,Emg +E s,l,i,Stby (2)
[0062] Among them, E s,l,i is the annual energy consumption of the lighting system of the i-th functional space, in kWh / a; E s,l,i,Lig E is the annual energy consumption of lighting in the i-th functional space, in kWh / a;s,l,i,Emg is the annual energy consumption of the lighting emergency system in the i-th functional space, in kWh / a, and is calculated as 1 kWh / (m 2 ·a);E s,l,i,Stby is the annual standby energy consumption of the lighting control system of the i-th functional space, in kWh / a, and is calculated as 1 kWh / (m 2 a).
[0063] In step S2 of this embodiment, the following calculation methods are used to determine the depth of the natural lighting area for two different types of window openings, namely, side windows and skylights:
[0064] When the window is a side window, the depth of the natural lighting area is calculated using formula (3):
[0065] L DL,i,S =2.5×(h 1,i -h 2,i ) (3)
[0066] Among them, L DL,i,s is the depth of the designed natural lighting area of the i-th functional space when the window form is a side window, m; h 1,i is the height of the top of the window of the i-th functional space, m; h 2,i is the height of the working surface of the i-th functional space, m;
[0067] When the window is a skylight, the depth of the natural lighting area is calculated using formula (4):
[0068] L DL,i,R =2.0×(h 3,i -h 2,i ) (4)
[0069] Among them, L DL,i,R is the depth of the designed natural lighting area of the i-th functional space when the window opening form is side skylight, m; h 3i is the height of the ceiling where the skylight of the i-th functional space is located, in m.
[0070] In step S3, the annual energy consumption of lighting in the i-th functional space is calculated using formula (5):
[0071]
[0072] Among them, P l,i is the power density of the lighting fixtures in the i-th functional space, in W / m 2 ;S DL,i The area of natural lighting designed for the i-th functional space, unit: m 2 ;SNDL,i The area of the i-th functional space that is not designed for natural lighting, unit: m 2 ;t eff,day,DL,i Design the annual daytime effective lighting operation time of natural lighting for the i-th functional space; t eff,day,NDL,i is the annual daytime effective lighting operation time of the i-th functional space without natural lighting design; t eff,night,i is the annual effective nighttime lighting time of the i-th functional space.
[0073] The area of the i-th functional space that is not designed for natural lighting is calculated using formula (6):
[0074] S NDL,i = S iS DL,i (6)
[0075] The annual daytime effective lighting operation time of the natural lighting designed for the i-th functional space is calculated using formula (7):
[0076] t eff,day,DL,i =t day,i ×F DL,i ×F OCC,i (7)
[0077] Among them, t day,i F is the theoretical value of the annual daytime lighting operation time of the i-th functional space, unit: h / a; DL,i is the daylight collection coefficient of the i-th functional space; F OCC,i is the personnel control coefficient of the i-th functional space.
[0078] The annual daytime effective lighting operation time of the i-th functional space without natural lighting is calculated using formula (8):
[0079] t eff,day,DNL,i =t day,i ×F OCC,i (8)
[0080] The annual effective nighttime lighting time of the i-th functional space is calculated using formula (9):
[0081] t eff,night,i =t night,i ×F OCC,i (9)
[0082] Among them, t night,i It is the theoretical value of annual nighttime lighting operation time of the i-th functional space, calculated based on the local sunrise and sunset times, in units of h / a.
[0083] The daylight collection coefficient of the i-th functional space is calculated using formula (10):
[0084] F DL,i =1-F DL,sup,i ×F DL,ctrl,i (10)
[0085] Among them, F DL,sup,i is the daylight supply coefficient of the i-th functional space; F DL,ctrl,i is the daylight control system coefficient of the i-th functional space;
[0086] The personnel control coefficient of the i-th functional space is calculated using formula (11):
[0087] F OCC,i =1-F A,i ×F OCC,ctrl,i (11)
[0088] Among them, F A,i is the staff absence coefficient of the i-th functional space; F OCC,ctrl,i is the coefficient of the personnel sensing control system of the i-th functional space.
[0089] The daylight supply coefficient of the i-th functional space is calculated using formula (12):
[0090] F DL,sup,i =0.169ln(D i )+1.289 (12)
[0091] Among them, D i is the daylighting coefficient of the i-th functional space.
[0092] The daylight control system coefficient of the i-th functional space is estimated according to the values in Table A.15 of ISO 10916:2014. The personnel absence coefficient of the i-th functional space is estimated according to the values in Appendix A.15 of ISO / CIE 20086:2019(E).
[0093] The values in Table D.2 are recorded; the personnel sensing control system of the i-th functional space; the coefficient of the personnel sensing control system is estimated according to the values in the following table.
[0094] Table 1 F OCC,ctrl Personnel sensing control system coefficient value table
[0095]
[0096] According to the method for calculating the energy consumption of dynamic lighting of functional spaces of buildings in the scheme design stage of the present invention, the energy consumption of the lighting system of the building in the embodiment is calculated.
[0097] Before calculation, collect the following information about the architectural design of the embodiment:
[0098] (1) Project Name: An office building in Xi'an
[0099] (2) Building type: Office building
[0100] (3) Technical indicators: Ground building area 35197m 2 , 24 floors above ground, building height 96.00m, building volume 141955.58m 3 , the building surface area is 15443.76m 2 , shape coefficient is 0.11, and the lighting form is side window lighting (side window parameter information is shown in Table 2);
[0101] (4) Building structure: frame core tube structure, seismic fortification intensity 8 degrees.
[0102] The office building in this case has a total of twenty-four floors. Except for the ground floor and the top floor, the second and third floors have separate floor plans, the fourth to fourteenth floors have the same standard floor plan, and the fifteenth to twenty-third floors have the same standard floor plan.
[0103] According to a method for calculating the dynamic lighting energy consumption of building functional spaces in the scheme design stage proposed by the present invention, some parameters used in the calculation are selected from the data in Table 3, and the calculation results are shown in Table 4.
[0104] Table 2 Side window parameter information
[0105]
[0106]
[0107]
[0108]
[0109] Table 3 Calculation parameters for office building lighting energy consumption in this embodiment
[0110]
[0111]
[0112] Table 4 Calculation of dynamic lighting energy consumption of functional spaces in the office building scheme design stage of this embodiment
[0113] Serial number floor area Annual energy consumption of lighting system 1 layer 1465.8 337.82 2 Second floor 1465.8 198.44 3 Three-layer 1465.8 311.84 4 4th to 14th floors 1465.8 537.47 5 15th to 23rd floors 1465.8 272.87 6 Twenty-fourth floor 1465.8 272.87 7 total 35179.2 9488.97
[0114] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.
Claims
1. A method for calculating the dynamic lighting energy consumption of building functional spaces during the scheme design phase, characterized by The following steps are involved: S1: Extract building functional space parameters, including: three-dimensional space size parameters, window opening parameters and working surface height h2; S2: Dynamic lighting area calculation: The dynamic lighting area is related to the location, size, type of the exterior window and the height of the work surface, and is calculated using formula (1): Among them, S DL,i The area of the natural lighting area designed in the i-th functional space, unit: m 2 ;L DL,i is the depth of the designed natural lighting area of the i-th functional space, in meters; W DL,i W is the width of the designed natural lighting area of the i-th functional space, in meters; W,i is the width of the window of the i-th functional space, in m; S3: Calculation of lighting system energy consumption: The energy consumption of the functional space lighting system includes: the lighting energy consumption of the functional space, the lighting emergency system energy consumption and the lighting control system standby energy consumption. The energy consumption of the lighting system is calculated using formula (2): AND s,l,i =And s,l,i,Lig +E s,l,i,Emg +E s,l,i,Stby (2) Among them, E s,l,i is the annual energy consumption of the lighting system of the i-th functional space, in kWh / a; E s,l,i,Lig is the annual energy consumption of lighting in the i-th functional space, in kWh / a; E s,l,i,Emg E is the annual energy consumption of the lighting emergency system in the i-th functional space, in kWh / a; s,l,i,Stby is the annual standby energy consumption of the lighting control system of the i-th functional space, in kWh / a.
2. The method for calculating dynamic lighting energy consumption of functional spaces in a building during the conceptual design phase according to claim 1 is characterized by: The window hole parameters include window hole position, size, and type.
3. The method for calculating dynamic lighting energy consumption of functional spaces in a building during the conceptual design phase according to claim 1 is characterized by: In step S2, when the window is a side window, the depth of the natural lighting area is calculated using formula (3): L DL,i,S =2.5×(h 1,i -h 2,i ) (3) Among them, L DL,i,s is the depth of the designed natural lighting area of the i-th functional space when the window form is a side window, m; h 1,i is the height of the top of the window of the i-th functional space, m; h 2,i is the height of the working surface of the i-th functional space, m.
4. The method for calculating dynamic lighting energy consumption for functional spaces of buildings during the conceptual design phase according to claim 1 is characterized by: In step S2, when the window is a skylight, the depth of the natural lighting area is calculated using formula (4): L DL,i,R =2.0×(h 3,i -h 2,i ) (4) Among them, L DL,i,R is the depth of the designed natural lighting area of the i-th functional space when the window form is a skylight, m; h 3,i is the height of the ceiling where the skylight of the i-th functional space is located, in m.
5. The method for calculating dynamic lighting energy consumption of functional spaces in a building during the conceptual design phase according to claim 1 is characterized by: The annual energy consumption of lighting in the i-th functional space in step S3 is calculated using formula (5): Among them, P l,i is the power density of the lighting fixtures in the i-th functional space, in W / m 2 ;S DL,i The area of natural lighting designed for the i-th functional space, unit: m 2 ;S NDL,i The area of the i-th functional space that is not designed for natural lighting, unit: m 2 ;t eff,day,DL,i Design the annual daytime effective lighting operation time of natural lighting for the i-th functional space; t eff,day,NDL,i is the annual daytime effective lighting operation time of the i-th functional space without natural lighting design; t eff,night,i is the annual effective nighttime lighting time of the i-th functional space.
6. The method for calculating dynamic lighting energy consumption of functional spaces in a building during the conceptual design phase according to claim 5 is characterized by: The area S of the i-th functional space that is not designed for natural lighting NDL,i Calculate using formula (6): S NDL,i =S i -S DL,i (6)。 7. The method for calculating dynamic lighting energy consumption of functional spaces in a building during the conceptual design phase according to claim 5 is characterized by: The annual daytime effective lighting operation time of the natural lighting designed for the i-th functional space is calculated using formula (7): t eff,day,DL,i =t day,i ×F DL,i ×F OCC,i (7) Among them, t day,i F is the theoretical value of the annual daytime lighting operation time of the i-th functional space, unit: h / a; DL,i is the daylight collection coefficient of the i-th functional space; F OCC,i is the personnel control coefficient of the i-th functional space; The annual daytime effective lighting operation time t of the i-th functional space without natural lighting design eff,day,NDL,i Calculate using formula (8): t eff,day,NDL,i =t day,i ×F OCC,i (8) The annual effective nighttime lighting time t of the i-th functional space eff,night,i Calculate using formula (9): t eff,night,i =t night,i ×F OCC,i (9) Among them, t night,i It is the theoretical value of annual nighttime lighting operation time of the i-th functional space, calculated based on the local sunrise and sunset times, in units of h / a.
8. The method for calculating dynamic lighting energy consumption of functional spaces in a building during the conceptual design phase according to claim 7 is characterized by: The daylight collection coefficient F of the i-th functional space DL,i Calculated using formula (10); F DL,i =1-F DL,sup,i ×F DL,ctrl,i (10) Among them, F DL,sup,i is the daylight supply coefficient of the i-th functional space; F DL,ctrl,i is the daylight control system coefficient of the i-th functional space.
9. The method for calculating dynamic lighting energy consumption of functional spaces in a building during the conceptual design phase according to claim 8 is characterized by: The personnel control coefficient F of the i-th functional space OCC,i Calculate using formula (11): F OCC,i =1-F A,i ×F OCC,ctrl,i (11) Among them, F A,i is the staff absence coefficient of the i-th functional space; F OCC,ctrl,i is the coefficient of the personnel sensing control system of the i-th functional space.
10. The method for calculating dynamic lighting energy consumption of functional spaces in a building during the conceptual design phase according to claim 8 is characterized by: The daylight supply coefficient of the i-th functional space is calculated using formula (12): F DL,sup,i =0.169 ln(D i )+1.289 (12) Where D is the daylighting coefficient of the i-th functional space.