Roof greening development potential evaluation system and method

Abstract

The invention discloses a roof greening development potential evaluation system and method, and relates to the technical field of roof greening development, and the system comprises a platform unit which is used for constructing a square matrix test platform based on a core variable and roof greening, and the square matrix test platform is used for evaluating the roof greening development potential; the index unit is used for obtaining a life cycle of roof greening, dividing the life cycle to obtain a plurality of stages, obtaining an accounting path of carbon increment on the basis of all the stages and the core variables, and obtaining subentry indexes on the basis of the accounting path; the calculation unit is used for obtaining sub-item data of the carbon potential; the evaluation unit is used for obtaining core data based on the sub-item data and the core indexes and obtaining an evaluation result of the roof greening development potential based on the core data; the problem of inaccurate evaluation caused by the fact that the carbon reduction and sink increase benefit accounting path of an existing roof greening development potential evaluation system is imperfect and cannot accurately and quantitatively calculate the carbon reduction and sink increase benefit can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of roof greening development, and in particular to a system and method for evaluating the development potential of roof greening. Background Art

[0002] Cities are the main carriers of economic and social activities and the main source of carbon in the world. Most of the world's carbon emissions come from cities, so urban decarbonization is crucial to curbing climate change. Urban decarbonization includes two ways: carbon emission reduction and carbon sink. In terms of carbon emission reduction, energy, land, industry and urban infrastructure (including construction, transportation, urban green space) and other fields are the first to bear the brunt; with the increase in carbon reduction requirements, while fully considering emission reduction and alternative energy, we should also pay full attention to urban carbon sinks. Among them, building an urban green landscape system is a positive and effective means.

[0003] Comprehensive development of urban three-dimensional space, improvement of urban greening level, and improvement of urban comprehensive carbon sink benefits are important ways to build an urban green landscape system. For example, roofs account for about 20-25% of the urban surface, and the total area of ​​global roofs reaches 3.8×10 11 square meters, with huge potential for green landscape construction. At the same time, roof greening has diverse environmental and ecological benefits in dealing with urban high temperatures, flood disasters, air pollution, water pollution, etc. It can also be upgraded to a roof farm, combining urban landscape and agricultural product supply functions, and has broad development prospects. Therefore, many countries and regions have introduced roof greening regulations and incentive policies to promote the development of roof greening.

[0004] Different from the carbon cycle mechanism of natural ecosystems, roof greening, as a type of building ancillary facilities, participates in the urban carbon cycle. In addition to natural carbon sinks, it also involves a variety of artificial pathways, such as environmental protection. The carbon cycle mechanism is complex, and the current roof greening development potential assessment system does not have a complete accounting path for the benefits of carbon reduction and carbon sink increase. It is unable to accurately and quantitatively calculate the benefits of carbon reduction and carbon sink increase, resulting in inaccurate assessments, which in turn has led to the inability of roof greening to be integrated into the carbon sink trading market, hindering the application of roof greening in low-carbon city construction. Summary of the invention

[0005] In order to solve the problem that the calculation path of carbon reduction and carbon sink increase benefits in the existing roof greening development potential assessment system is imperfect, and the carbon reduction and carbon sink increase benefits cannot be accurately and quantitatively calculated, resulting in inaccurate assessment, the present invention provides a roof greening development potential assessment system, the system comprising:

[0006] Platform unit: used to construct a square array test platform based on core variables and roof greening, and the square array test platform is used to evaluate the development potential of roof greening;

[0007] Indicator unit: used to obtain the life cycle of the roof greening, divide the life cycle into several stages, obtain the carbon sink accounting path based on all the stages and the core variables, and obtain sub-item indicators based on the accounting path, wherein the accounting path includes an embodied carbon path, a biological carbon sink path, a renewable energy path, and an operational carbon reduction path;

[0008] Calculation unit: used to obtain the sub-item data of carbon potential;

[0009] Evaluation unit: used to obtain core data based on the sub-item data and core indicators, and obtain an evaluation result of the development potential of roof greening based on the core data;

[0010] The breakdown includes the embodied carbon baseline NV EC 、Carbon sink NV CS 、Carbon emission reduction NV BS and Operational Carbon Reduction NV OC , the itemized data is obtained in the following way:

[0011] Based on the core variables, the green roof is divided to obtain several green roof classifications, and the embodied carbon quantity of the green roof is obtained. Based on the embodied carbon path, the green roof classification and the embodied carbon quantity, the embodied carbon baseline NV of each green roof classification is obtained. EC ;

[0012] Based on the biological carbon sink path and the square array test platform, the test box tests the soil respiration of the roof greening to obtain test parameters, and obtains the carbon sink amount NV based on the test parameters. CS ;

[0013] The renewable energy path obtains the total amount of biomass, and the carbon emission reduction NV is obtained based on the total amount of biomass. BS ;

[0014] Based on the operation carbon reduction path, the canopy surface temperature of the green roof is obtained, based on the canopy surface temperature, the first net radiation is obtained, based on the radiation measurement device, the second net radiation of the canopy is obtained, and based on the first net radiation and the second net radiation, the latent heat flux is obtained; based on the latent heat flux, the air conditioning power consumption is obtained, and based on the air conditioning power consumption, the operation carbon reduction amount NV is obtained. OC .

[0015] Roof greening belongs to the urban ecosystem, and its carbon flow is embedded in the urban carbon cycle system, with the characteristics of natural-artificial dual carbon cycle of urban system. Among them, the natural carbon process is mainly the carbon cycle of plant and soil life activities, including plant photosynthesis, respiration, microbial respiration, and microbial carbon sequestration. This process mainly transfers carbon from the atmospheric carbon pool to the vegetation and soil carbon pool. The artificial carbon process refers to the reduction (or increase) of urban CO2 emissions due to the participation of roof greening in urban operations, including the increase of CO2 emissions due to the construction of roof greening, the reduction of CO2 emissions due to the use of roof greening for building insulation and urban climate regulation, and the reduction of CO2 emissions due to the use of roof greening to produce bioenergy. Based on the natural-artificial dual carbon cycle theory of roof greening, the present invention deconstructs the internal carbon cycle mechanism of roof greening from the perspective of carbon flux, combines the life cycle theory (LCA), carbon sequestration theory (CCS), renewable energy technology (REP) and urban local climate theory (LCR), and proposes a complete roof greening carbon reduction and sink increase accounting path including embodied carbon, biological carbon sink, biological energy supply and operational carbon. It fully considers the carbon consumed in the construction, operation and maintenance process, the carbon transfer from the atmospheric carbon pool to the vegetation and soil carbon pool, the carbon reduction effect brought by roof greening through biological energy supply, and the air conditioning load reduced by roof greening through transpiration, and comprehensively calculates the embodied carbon baseline, carbon sink, carbon emission reduction and operational carbon reduction, so as to achieve the perfection of the accounting path. It can more accurately quantify the benefits of carbon reduction and carbon sink increase, improve the accuracy of assessment, and simplify the carbon cycle mechanism, which can better realize the quantification of the benefits of carbon reduction and carbon sink increase; build a square array test platform based on roof greening, quantify the carbon potential through the square array test platform and accounting path, and calculate the carbon potential more accurately, thereby more accurately realizing the quantification of the benefits of carbon reduction and carbon sink increase and improving the accuracy of assessment; and the core variables and core indicators clarify the assessment boundaries and influencing factors, which is conducive to the same baseline comparison of the carbon reduction potential of various types of roof greening; the square array test platform uses modular units to test the carbon potential of four paths under multiple variables at one time, which improves the rapidity and flexibility of commercial assessment, and is conducive to undertaking commercial roof greening carbon sink potential assessment orders or serving carbon sink trade verification.

[0016] The embodied carbon pathway is used to account for carbon consumed during construction, operation and maintenance. The biological carbon sink pathway transfers carbon from the atmospheric carbon pool to the vegetation and soil carbon pool, including plant photosynthesis, respiration, microbial respiration, and microbial carbon sequestration. The renewable energy pathway is for bioenergy supply, such as generating biogas through anaerobic fermentation of grass. The operational carbon reduction pathway uses a large amount of solar radiation heat for water vaporization through transpiration, and the latent heat of vaporization eliminates a large amount of environmental heat, reducing the air-conditioning load. The present invention sets four sub-indicators for roof greening carbon assessment based on the above four pathways, namely, the embodied carbon normalization index, the biological carbon sink normalization index, the renewable energy normalization index, and the operational carbon reduction normalization index. Because embodied carbon is a carbon source, the latter three provide carbon sink benefits as the roof greening continues to operate. Therefore, the carbon payback period of roof greening and the overall carbon potential within the life cycle of roof greening are defined as the core indicators for evaluating the development potential of roof greening.

[0017] Furthermore, the specific steps of obtaining the test parameters include:

[0018] Cover the test box with a mask, and based on a first preset time period and a preset time interval, obtain a first parameter of the test box based on a detection device; remove the mask of the test box, and based on a second preset time period and the preset time interval, obtain a second parameter of the test box based on the detection device, and obtain the test parameter based on the first parameter and the second parameter.

[0019] Carbon sink NV CS It is the composite result of soil microbial respiration, plant respiration and plant photosynthesis. It measures the CO2 concentration change of a unit area of ​​roof greening within a certain period of time in a closed manner, and calculates the CO2 flux based on the concentration change rate, thereby calculating the carbon sink. The test box is connected to the gas box slot of the matrix of the square array test platform to create a closed space, which is convenient for calculating the CO2 concentration change of roof greening within a certain period of time in a closed space, thereby calculating the carbon sink. When the mask is covered, the test box is a dark box. When the mask is removed, the test box is a bright box. Using the dark box test first can avoid the greenhouse effect of the bright box causing a sharp increase in the internal temperature. At the same time, the CO2 concentration in the box is sufficient after the dark box is finished, avoiding the photosynthesis test error caused by the lack of CO2 in the small box.

[0020] Further, the carbon sink amount NV is obtained based on the test parameters. CS The specific steps include:

[0021] Analyze the test parameters based on a gas analyzer to obtain CO2 concentration;

[0022] Obtain the air temperature, atmospheric pressure and the size of the test box; obtain the unit carbon flux based on the atmospheric pressure, the CO2 concentration and the size; obtain the total carbon sink flux based on the unit carbon flux, the first preset time period and the second preset time period; obtain the carbon sink amount NV based on the total carbon sink flux CS .

[0023] Furthermore, the core variables include substrate depth, plant species and drought stress.

[0024] The four sub-indicators are affected by complex environmental factors. To facilitate actual development, the present invention incorporates three main influencing factors: substrate depth, plant species and drought stress. These three variables serve as core variables and are also the main optimization objects for improving carbon reduction benefits (or carbon sink market income) based on the evaluation results.

[0025] Furthermore, the specific steps of obtaining several roof greening classifications include:

[0026] The green roof is divided based on the substrate depth to obtain all the green roof classifications, which include extensive green roof, semi-intensive green roof and intensive green roof.

[0027] The embodied carbon benchmark is an important condition for incorporating roof greening into the carbon sink market development. For similar forms of roof greening, their embodied carbon levels are similar. Dividing roof greening into three types according to substrate depth makes it faster to calculate embodied carbon, which helps to compare the carbon reduction potential of various types of roof greening with the same baseline.

[0028] Furthermore, the embodied carbon baseline values ​​of the extensive roof greening, the semi-intensive roof greening and the intensive roof greening are 45.26 kg CO2 m -2 、92.36kg CO2 m -2 and 148.59 kg CO2 m -2 .

[0029] Furthermore, the square array test platform includes a plurality of test devices, each of which includes an iron frame and a planting table, the iron frame is connected to the planting table, a temperature measuring device is provided on the top of the iron frame, the planting table includes a plurality of enclosure panels and planting panels, the maintenance panel is connected to the planting panel, and the planting table has built-in thermal insulation cotton.

[0030] For the applicability of actual development, the present invention obtains calculation data based on modular scale units and provides a potential index based on each square meter, which is convenient for regional scale (community scale, city scale). A roof greening module array test bench is designed based on three variables to quantify the carbon potential of four pathways.

[0031] Furthermore, the specific steps of constructing the square array test platform include:

[0032] Each planting board is installed with a substrate of different substrate depths, the substrate is used to plant plants of different plant species, the plants are divided into different drought stress levels, the substrate is pre-buried with an air box groove, and the air box groove is used to install the test box.

[0033] A green roof module array test bench was designed based on three variables to quantify the carbon potential of four pathways.

[0034] Furthermore, the sub-indicators include the normalized index of embodied carbon, the normalized index of biocarbon sink, the normalized index of renewable energy and the normalized index of operational carbon reduction, and the core indicators include carbon payback period and overall carbon potential.

[0035] The present invention also provides a method for evaluating the development potential of roof greening, the method comprising:

[0036] Building a square array test platform based on core variables and roof greening, the square array test platform is used to evaluate the development potential of roof greening;

[0037] Obtain the life cycle of the roof greening, divide the life cycle into several stages, obtain a carbon sink accounting path based on all the stages and the core variables, and obtain sub-item indicators based on the accounting path, wherein the accounting path includes an embodied carbon path, a biological carbon sink path, a renewable energy path, and an operational carbon reduction path;

[0038] Obtaining breakdown of carbon potential;

[0039] Based on the sub-item data and core indicators, core data are obtained, and based on the core data, an evaluation result of the development potential of roof greening is obtained;

[0040] The breakdown includes the embodied carbon baseline NV EC 、Carbon sink NV CS 、Carbon emission reduction NV BS and Operational Carbon Reduction NV OC , the itemized data is obtained in the following way:

[0041] Based on the core variables, the green roof is divided to obtain several green roof classifications, and the embodied carbon quantity of the green roof is obtained. Based on the embodied carbon path, the green roof classification and the embodied carbon quantity, the embodied carbon baseline NV of each green roof classification is obtained. EC ,;

[0042] Based on the biological carbon sink path and the square array test platform, the soil respiration of the roof greening is tested to obtain test parameters, and the carbon sink amount NV is obtained based on the test parameters.CS ;

[0043] The renewable energy path obtains the total amount of biomass, and the carbon emission reduction NV is obtained based on the total amount of biomass. BS ;

[0044] Based on the operation carbon reduction path, the canopy surface temperature of the green roof is obtained, based on the canopy surface temperature, the first net radiation is obtained, based on the radiation measurement device, the second net radiation of the canopy is obtained, and based on the first net radiation and the second net radiation, the latent heat flux is obtained; based on the latent heat flux, the air conditioning power consumption is obtained, and based on the air conditioning power consumption, the operation carbon reduction amount NV is obtained. OC .

[0045] The principle and effect of this method are similar to those of this system, and no further description will be given for this method.

[0046] One or more technical solutions provided by the present invention have at least the following technical effects or advantages:

[0047] 1. The present invention deconstructs the internal carbon cycle mechanism of roof greening from the perspective of carbon flux, combines the life cycle theory (LCA), carbon sequestration theory (CCS), renewable energy technology (REP) and urban local climate theory (LCR), and proposes a complete roof greening carbon reduction and sink increase accounting path including embodied carbon, biological carbon sink, biological energy supply and operational carbon, fully considering the carbon consumed in the construction, operation and maintenance process, the carbon transfer from the atmospheric carbon pool to the vegetation and soil carbon pool, the carbon reduction effect brought by roof greening through biological energy supply, and the air conditioning load reduced by roof greening through transpiration, comprehensively calculates the embodied carbon baseline, carbon sink, carbon emission reduction and operational carbon reduction, realizes the improvement of the accounting path, can more accurately and quantitatively calculate the carbon reduction and sink increase benefits, improves the accuracy of the assessment, and simplifies the carbon cycle mechanism, which can better realize the quantification of the carbon reduction and sink increase benefits; constructs a square array test platform based on roof greening, quantifies the carbon potential through the square array test platform and the accounting path, and calculates the carbon potential more accurately, thereby more accurately realizing the quantification of the carbon reduction and sink increase benefits, and improving the accuracy of the assessment.

[0048] 2. The core variables and core indicators define the assessment boundaries and influencing factors, which facilitates the baseline comparison of the carbon reduction potential of various types of green roofs.

[0049] 3. The square array test platform uses modular units to test the carbon potential of four paths under multiple variables at one time, which improves the speed and flexibility of commercial evaluation, and is conducive to undertaking commercial roof greening carbon sink potential evaluation orders or serving carbon sink trade verification.

[0050] 4. Carbon payback period, as a core evaluation indicator, is helpful for the low-carbon oriented design and optimization of roof greening. By changing the three core variables, the carbon payback period can be cyclically optimized, or the optimal solution can be obtained through machine learning. Specific accounting path optimization can also be carried out according to development conditions to maximize resource utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of the present invention, and do not constitute a limitation on the embodiments of the present invention;

[0052] Figure 1 It is a structural schematic diagram of a roof greening development potential assessment system in the present invention;

[0053] Figure 2 is a flow chart of the green roof development potential assessment system in the present invention, wherein NV-CS, NV-BS, NV-OC and NV-EC represent the embodied carbon baseline NV EC 、Carbon sink NV CS 、Carbon emission reduction NV BS and Operational Carbon Reduction NV OC ;

[0054] Figure 3 It is a schematic diagram of the process of obtaining the sub-item data of carbon potential in the present invention;

[0055] Figure 4 is a schematic diagram of the embodied carbon baseline values ​​of extensive roof greening, semi-intensive roof greening and intensive roof greening in the present invention, wherein EGR represents extensive roof greening, SiGR represents semi-intensive roof greening, and IGR represents intensive roof greening;

[0056] Figure 5 is a schematic diagram of the life cycle stage coverage of embodied carbon in the present invention, Stage A, Stage B and Stage C respectively represent the production and construction stage, the use stage and the end of life stage of the life cycle stage, and A1-A5, B1-B7 and C1-C4 respectively represent specific stages under the production and construction stage, the use stage and the end of life stage;

[0057] Figure 6 It is a schematic diagram of the planar structure of the square array test platform of the present invention;

[0058] Figure 7 It is a schematic diagram of the cross-sectional structure of the square array test platform of the present invention;

[0059] Figure 8 It is a structural schematic diagram of the matrix structural layer of the square array test platform in the present invention. DETAILED DESCRIPTION

[0060] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0061] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those within the scope of this description. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0062] Embodiment 1

[0063] refer to Figure 1-Figure 5 This embodiment provides a system for evaluating the development potential of roof greening, the system comprising:

[0064] Platform unit: used to construct a square array test platform based on core variables and roof greening, wherein the square array test platform is used to evaluate the development potential of roof greening; wherein the core variables include substrate depth, plant species and drought stress.

[0065] Indicator unit: used to obtain the life cycle of the roof greening, divide the life cycle into several stages, obtain the carbon sink accounting path based on all the stages and the core variables, and obtain sub-item indicators based on the accounting path, wherein the accounting path includes an embodied carbon path, a biological carbon sink path, a renewable energy path, and an operational carbon reduction path;

[0066] Calculation unit: used to obtain the sub-item data of carbon potential;

[0067] Evaluation unit: used to obtain core data based on the sub-item data and core indicators, and obtain an evaluation result of the development potential of roof greening based on the core data;

[0068] Among them, the sub-indicators include the normalized index of embodied carbon, the normalized index of biological carbon sink, the normalized index of renewable energy and the normalized index of operational carbon reduction; the core indicators include carbon payback period and overall carbon potential.

[0069] The breakdown includes the embodied carbon baseline NV EC 、Carbon sink NV CS 、Carbon emission reduction NV BS and Operational Carbon Reduction NV OC , the itemized data is obtained in the following way:

[0070] Based on the core variables, the green roof is divided to obtain several green roof classifications, and the embodied carbon quantity of the green roof is obtained. Based on the embodied carbon path, the green roof classification and the embodied carbon quantity, the embodied carbon baseline NV of each green roof classification is obtained. EC ;

[0071] Among them, the specific steps to obtain several roof greening classifications include:

[0072] The green roof is divided based on the substrate depth to obtain all the green roof classifications, which include extensive green roof, semi-intensive green roof and intensive green roof.

[0073] Based on the biological carbon sink path and the square array test platform, the test box tests the soil respiration of the roof greening to obtain test parameters, and obtains the carbon sink amount NV based on the test parameters. CS ;

[0074] The specific steps of obtaining the test parameters include:

[0075] Cover the test box with a mask, and based on a first preset time period and a preset time interval, obtain a first parameter of the test box based on a detection device; remove the mask of the test box, and based on a second preset time period and the preset time interval, obtain a second parameter of the test box based on the detection device, and obtain the test parameter based on the first parameter and the second parameter.

[0076] Wherein, the carbon sink amount NV is obtained based on the test parameters CS The specific steps include:

[0077] Analyze the test parameters based on a gas analyzer to obtain CO2 concentration;

[0078] Obtain the air temperature, atmospheric pressure and the size of the test box; obtain the unit carbon flux based on the atmospheric pressure, the CO2 concentration and the size; obtain the total carbon sink flux based on the unit carbon flux, the first preset time period and the second preset time period; obtain the carbon sink amount NV based on the total carbon sink flux CS .

[0079] The renewable energy path obtains the total amount of biomass, and the carbon emission reduction NV is obtained based on the total amount of biomass. BS ;

[0080] Based on the operation carbon reduction path, the canopy surface temperature of the green roof is obtained, based on the canopy surface temperature, the first net radiation is obtained, based on the radiation measurement device, the second net radiation of the canopy is obtained, and based on the first net radiation and the second net radiation, the latent heat flux is obtained; based on the latent heat flux, the air conditioning power consumption is obtained, and based on the air conditioning power consumption, the operation carbon reduction amount NV is obtained. OC .

[0081] Drought stress is a phenomenon in which the growth of plants is significantly inhibited due to a lack of available water.

[0082] Carbon flux is one of the most basic concepts in carbon cycle research, which refers to the total amount of carbon elements that pass through a certain ecological section of an ecosystem.

[0083] Embodied carbon refers to the greenhouse gas emissions associated with a product or material over its entire life cycle.

[0084] The embodied carbon baseline refers to the benchmark value of the amount of greenhouse gases emitted by a country, region, enterprise, etc. under specific time and conditions.

[0085] Carbon sink refers to the process, activity or mechanism of reducing the concentration of greenhouse gases in the atmosphere by absorbing carbon dioxide in the atmosphere through measures such as afforestation and vegetation restoration. In contrast to carbon sink, carbon source refers to the source of carbon dioxide, which comes from both nature and human production and life processes. According to different sources, carbon sinks can be divided into two types: natural carbon sinks and artificial carbon sinks.

[0086] Carbon sink refers to the change in carbon storage in the roof greening carbon pool over a certain period of time.

[0087] Carbon emission reduction refers to the reduction of carbon dioxide emissions.

[0088] Operational carbon reduction refers to the carbon emissions reduced by optimizing operating methods or adopting low-carbon technologies.

[0089] Carbon sink flux refers to the process, activity or mechanism that removes greenhouse gases such as carbon dioxide from the atmosphere.

[0090] Biomass refers to various organisms produced through photosynthesis using the atmosphere, water, land, etc., that is, all living and growing organic matter. It includes plants, animals and microorganisms, as well as these organisms and their waste products.

[0091] Latent heat flux is the heat exchange per unit area under constant temperature conditions, and is measured in watts per square meter.

[0092] The matrix refers to all components except the analyte, and refers to the environment of the analyte. The matrix combination refers to the mixing of matrices of different properties in proportion to achieve a specific effect.

[0093] Core variables refer to independent variables that are of particular interest in the study and are mainly used to explain changes in dependent variables.

[0094] Core indicators are indicators that measure and evaluate the most critical and representative aspects of things or phenomena.

[0095] The carbon payback period refers to the period of recovering carbon emissions during the construction period through carbon emission reductions during the operation period, that is, the time when the cumulative carbon footprint turns from a positive value to a negative value for the first time.

[0096] Carbon sinks refer to the sink and storage of carbon dioxide.

[0097] Carbon potential refers to the amount of carbon dioxide emissions from fossil fuels contained in unit output and is an important indicator for measuring the level of green development of a country or region.

[0098] Soil respiration refers to the process in which plant roots, detritus-feeding animals, fungi and bacteria in the soil consume organic matter and produce carbon dioxide through metabolic activities.

[0099] The canopy refers to the dense layer of branches and leaves of trees, crops or other vegetation.

[0100] Air conditioning power saving: refers to the reduction in air conditioning power consumption through the transpiration effect of roof greening.

[0101] Embodiment 2

[0102] refer to Figure 6-Figure 8 On the basis of the first embodiment, in this embodiment, the square array test platform includes a plurality of test devices, each of which includes an iron frame and a planting table, the iron frame is connected to the planting table, a temperature measuring device is provided on the top of the iron frame, the planting table includes a plurality of enclosure plates and planting plates, the maintenance plate is connected to the planting plate, and the planting table has built-in heat preservation cotton. In this embodiment, the temperature measuring device can be an infrared thermal imager, etc.

[0103] The specific steps to build a square array test platform include:

[0104] Each planting board is installed with a substrate of different substrate depths, the substrate is used to plant plants of different plant species, the plants are divided into different drought stress levels, the substrate is pre-buried with an air box groove, and the air box groove is used to install the test box.

[0105] Embodiment 3

[0106] Based on the above embodiment, in this embodiment, the carbon sink amount NV is obtained. CSThe first calculation formula is:

[0107]

[0108] Among them, NV CS0 Indicates unit carbon flux (kgCO2m -2 s -1 ), P represents atmospheric pressure (Pa); H represents the height of the test chamber (m); T represents air temperature (℃); (ppm / s) represents the change in CO2 concentration per unit time.

[0109]

[0110] Among them, NV CS represents the total carbon sink flux, represents the daytime carbon sink flux, represents the carbon sink flux at night.

[0111]

[0112] Among them, NV CS Indicates carbon sink NV CS , N.V. CS i represents the total carbon sink flux on the i-th day, and n represents the number of days.

[0113] Get Carbon Emission Reduction NV BS The second calculation formula is:

[0114] NV BS 1 =AD1×ΔEF1; (4)

[0115] NV BS 2 =AD1×ΔEF2; (5)

[0116] Among them, NV BS 1 and NV BS 2 Both represent carbon emission reduction NV BS , you can choose formula (4) or formula (5) for calculation, AD1 represents the total amount of biomass (kg), ΔEF1 represents the difference between the carbon emission coefficient of methane and the carbon emission coefficient of gasoline for vehicles, and ΔEF2 represents the difference between the carbon emission coefficient of methane and the carbon emission coefficient of the power grid.

[0117] Obtaining the operational carbon reduction NV OC The third calculation formula is:

[0118]

[0119] R n0 =(1-α)R s +5.68×10 8 (0.92×105 T a 6 -0.98T c0 4 ); (7)

[0120] Where LE is the latent heat flux (J m -2 h -1 );R n Represents the second net radiation (W / m 2 ), R n0 Represents the first net radiation (W / m 2 ), T c0 It represents the surface temperature of the non-transpiration reference canopy, which can be obtained by measuring the surface temperature of a thin piece of paper placed in the roof greening canopy (and not blocked by leaves) with the same color as the measured canopy. c represents the canopy surface temperature, T a represents the air temperature, α represents the reflectivity of the vegetation canopy, and R s Indicates the solar shortwave radiation (W / m2);

[0121]

[0122] Among them, LE i represents the latent heat flux (Jm -2 d -1 ), COP stands for cooling efficiency, which refers to the ratio of the cooling capacity and input power of the heat pump (which can be an air-conditioning compressor) installed in the green roof building. i represents the air conditioning power consumption on day i (kwhd -1 ), NV OC Indicates the amount of carbon reduction during operation NV OC (kg CO2m -2 a -1 ), EF i represents the carbon emission coefficient of the power grid on day i (kg CO2 TJ -1 ), n represents the number of days.

[0123] The fourth calculation formula of the carbon payback period is:

[0124]

[0125] Where C-PT represents carbon payback period, NV 40EC Indicates the embodied carbon baseline value calculated based on a 40-year life cycle; NV CS NV BS and NV OC Represents carbon sink NV CS 、Carbon emission reduction NV BS and carbon reduction NVOC .

[0126] The fifth calculation formula of the overall carbon potential is:

[0127] NV 40a =40(NV CS +NV BS +NV OC )-NV 40EC ; (11)

[0128] Among them, NV 40a Represents the total carbon potential of a green roof over a 40-year life cycle, NV 40EC Indicates the embodied carbon baseline value calculated based on a 40-year life cycle; NV CS NV BS and NV OC Represents carbon sink NV CS 、Carbon emission reduction NV BS and carbon reduction NV OC .

[0129] Embodiment 4

[0130] refer to Figure 1-Figure 8 Based on the above embodiment, in this embodiment, an example is given to illustrate the evaluation process of the roof greening development potential evaluation system:

[0131] 1. Construct a square array test platform based on core variables and roof greening, which is used to evaluate the development potential of roof greening; wherein the core variables include substrate depth, plant species and drought stress;

[0132] refer to Figure 6-Figure 8 The square array test platform includes a number of test devices, each of which includes an iron frame and a planting table. The iron frame is connected to the planting table. An infrared thermal imager is provided on the top of the iron frame. A shutter cover is provided outside the infrared thermal imager to protect the internal infrared thermal imager (rain and sun protection while ensuring ventilation and heat dissipation). The planting table includes a number of enclosure panels and planting boards. The maintenance panel is connected to the planting board, and the planting table has built-in thermal insulation cotton. Figure 6 The additional structure in Figure 8 In addition to the vegetation and the matrix, these additional structures are mainly used to improve the water retention and drainage performance of the green roof, prevent root puncture and keep warm, etc., and may not be set. In this embodiment, the shutter cover can be an outdoor meteorological test shutter box.

[0133] The specific steps to build a square array test platform include:

[0134] refer to Figure 6Each of the planting boards is installed with substrates of different substrate depths, such as a 500mm substrate combination, a 350mm substrate combination and a 200mm substrate combination. The substrate combination can be 50% nutrient soil + 50% natural soil. The substrate is planted with plants of different plant species, such as three plant species: forage (alfalfa), vegetables (potatoes) and medicinal herbs (mint). The plants are divided into different drought stress types, such as a minimum soil water content (VWC) higher than 20% and natural conditions (no irrigation). The substrate is pre-buried with an air box groove, and the air box groove is used to install the test box.

[0135] 2. Reference Figure 1 , obtain the life cycle of the roof greening, divide the life cycle into several stages, including the production stage, the construction stage, the use stage, the end of life stage and the stage outside the life cycle, and obtain the carbon sink accounting path based on all the stages and the core variables. The accounting path includes the implicit carbon path: used to account for the carbon consumed in the construction, operation and maintenance processes (A1-A3, A4-A5, B2-B5 and C1-C4); biological carbon sink path: plant photosynthesis, respiration, microbial respiration, and microbial carbon sequestration in stages B1 and B5. This path mainly transfers carbon from the atmospheric carbon pool to the vegetation and soil carbon pool; renewable energy path: stages B1, B5 and D are for bioenergy supply; operational carbon reduction path: stages B1, B6 and B7, roof greening uses a large amount of solar radiation heat for water vaporization through transpiration, and the latent heat of vaporization eliminates a large amount of environmental heat, reducing the air conditioning load;

[0136] Obtain sub-item indicators based on the accounting path to obtain sub-item data on carbon potential;

[0137] Among them, the sub-indicators include the normalized index of embodied carbon, the normalized index of biocarbon sink, the normalized index of renewable energy and the normalized index of operational carbon reduction.

[0138] The carbon payback period (C-PT) of green roof is defined as NV CS NV BS and NV OC Offset NV EC The time required for the carbon reduction, C-PT can be understood as the ratio of total carbon cost to annual carbon return; the total carbon potential (NV 40a ) is the sum of plant carbon sinks, fuel substitution carbon sinks and operating carbon sinks during the life cycle of the green roof (40 years) minus the total embodied carbon.

[0139] The breakdown includes the embodied carbon baseline NV EC 、Carbon sink NV CS 、Carbon emission reduction NV BS and Operational Carbon Reduction NV OC , the itemized data is obtained in the following way:

[0140] A. Based on the core variables, the green roof is divided to obtain several green roof classifications; wherein, the specific steps of obtaining several green roof classifications include: based on the substrate depth, the green roof is divided to obtain all the green roof classifications, the green roof classifications include extensive green roof, semi-intensive green roof and intensive green roof, such as dividing the green roof according to the substrate depth into extensive green roof (substrate depth is less than 200mm), semi-intensive green roof (substrate depth is greater than 200mm and less than 350mm) and intensive green roof (substrate depth is greater than 350mm).

[0141] Currently, embodied carbon calculations are mostly performed through the carbon coefficient method. However, the carbon coefficient method requires detailed records of the types of roof greening materials used, construction methods, maintenance methods, and demolition scenarios, which is almost impossible to achieve in commercial development. For similar forms of roof greening, their embodied carbon levels are similar.

[0142] Therefore, in this embodiment, based on the existing 25 studies in the SCI literature library that calculated the embodied carbon of roof greening by carbon coefficient, reference Figure 5 , Stage A, Stage B and Stage C represent the production and construction stage, use stage and end of life stage of the life cycle respectively, A1-A5, B1-B7 and C1-C4 represent the specific stages under the production and construction stage, use stage and end of life stage respectively. The specific stages have been Figure 1 Indicated in.

[0143] The green roof types are divided into three categories, and the average values ​​of different categories are calculated to obtain the embodied carbon quantity of the green roof. Based on the embodied carbon path, the green roof classification and the embodied carbon quantity, the embodied carbon baseline NV of each green roof classification is obtained. EC ;

[0144] The embodied carbon accounting mainly calculates the carbon of materials and the carbon during operation. Materials have a lifespan and need to be replaced every once in a while. The annual maintenance carbon emissions during operation increase with the lifespan. Therefore, a 40-year green roof carbon accounting cycle is selected in this embodiment, which is generally recognized by the academic community in this field. Therefore, the embodied carbon level of roof greening under a 40-year life cycle is calculated, and the average value is taken as the baseline level. The embodied carbon baseline values ​​of the extensive roof greening, the semi-intensive roof greening, and the intensive roof greening are 45.26 kg CO2 m -2 、92.36kg CO2 m -2 and 148.59 kg CO2 m -2 .

[0145] B. Based on the biological carbon sink path and the square array test platform, the test box tests the soil respiration of the roof greening to obtain test parameters, and obtains the carbon sink amount NV based on the test parameters. CS ;

[0146] The specific steps of obtaining the test parameters include:

[0147] Cover the test box with a mask, obtain the first parameter of the test box based on the detection device based on the first preset time period and the preset time interval; remove the mask of the test box, obtain the second parameter of the test box based on the detection device based on the second preset time period and the preset time interval, and obtain the test parameter based on the first parameter and the second parameter. If a typical day is used, the test is carried out according to daytime (7:00-17:00, interval 2h) and night (19:00-23:00, interval 2h). During the daytime test, the soil microbial respiration and the overall intensity of plant respiration are first tested (10min) in a dark box, and then the total photosynthetic intensity of plants is tested (10min) in a bright box. In this embodiment, the test parameters may include air temperature, humidity and CO2 concentration, and the detection device is a device that can measure air temperature, humidity and CO2 concentration.

[0148] Wherein, the carbon sink amount NV is obtained based on the test parameters CS The specific steps include:

[0149] The test parameters are analyzed based on a gas analyzer to obtain the CO2 concentration; in this embodiment, the gas analyzer can be an infrared gas analyzer.

[0150] Obtain the air temperature, atmospheric pressure and the size of the test box; obtain the unit carbon flux based on the atmospheric pressure, the CO2 concentration and the size; obtain the total carbon sink flux based on the unit carbon flux, the first preset time period and the second preset time period, such as the total carbon sink during the day minus the total carbon sink at night; obtain the carbon sink amount NV based on the total carbon sink flux CS .

[0151] In order to obtain the CO2 flux under different light and temperature conditions, the test is carried out with a year or half-year cycle (including the full temperature and full light during the growing period) to calculate the flux. For application purposes, a flux table that is easy to obtain values ​​should be compiled based on the calculation results. The standard model is shown in Table 1. For a specific roof greening development project, the NV within one year CS The actual temperature and light conditions can be used as reference for the carbon sink standard flux table and formula (1)-formula (3) for cumulative calculation.

[0152] Table 1 Roof greening carbon sink standard flux table

[0153]

[0154] C. Obtaining the total amount of biomass based on the renewable energy pathway, and obtaining the carbon emission reduction NV based on the total amount of biomass BS ;

[0155] From the perspective of absolute CO2 exchange between the ground and the atmosphere, the bioenergy supply pathway cannot contribute to carbon reduction in the built environment, because the CO2 stored in the photosynthetic process is released back into the atmosphere. However, as a substitute for traditional energy, such as natural gas replacing gasoline, gas hot water replacing electric hot water, etc., it can promote carbon emission reduction. Because the carbon emission factor of natural gas is 56100kg CO2 TJ -1 , which is less than the carbon emission factor of gasoline for vehicles, 69300kg CO2 TJ -1 (from IPCC emissionfactor database 2006) and grid carbon emission factor 161389kg CO2 TJ -1 (Average value of China's power grid released by the Ministry of Ecology and Environment).

[0156] Therefore, in this embodiment, the reduction in carbon emissions caused by using biomethane to replace gasoline with the same calorific value is used to represent the carbon emission reduction NV BS ; Carbon emission reduction NV BS According to the number of biomass harvests, based on the total amount of biomass, the difference between the methane carbon emission coefficient and the carbon emission coefficient of gasoline for vehicles, and the difference between the methane carbon emission coefficient and the carbon emission coefficient of the power grid, refer to formula (4)-formula (5) to calculate the carbon emission reduction NV BS .

[0157] D. Using a typical day, based on the operational carbon reduction path, obtain the canopy surface temperature of the green roof, obtain the first net radiation based on the canopy surface temperature, obtain the second net radiation of the canopy based on a radiation measurement device, obtain the latent heat flux based on the first net radiation and the second net radiation; obtain the air conditioning power consumption based on the latent heat flux, and obtain the operational carbon reduction amount NV based on the air conditioning power consumption OC .

[0158] Roof greening is mainly used for roof insulation and space cooling in summer. According to the local space energy balance, under steady-state conditions (the horizontal energy in and out of the space above the roof is the same), the energy balance of the roof greening surface space is shown in formula (12):

[0159] R n =H+LE+G; (12)

[0160] Among them, R nis the net radiation flux, which can be read by a net radiometer, H is the turbulent sensible heat flux; LE is the heat lost through evaporation and transpiration; G is the heat flux transferred downward.

[0161] The energy transfer process is: R n It is the only energy source acting on the green roof. Subsequently, part of the heat flux directly affects the indoor space thermal environment through G, and part of the heat flux affects the outdoor space thermal environment through H and indirectly acts on the indoor space thermal environment, both of which increase the air conditioning load. Another part of the energy LE is converted into latent heat (internal energy) by transpiration. The higher the LE, the more beneficial it is to reduce the air conditioning load in summer.

[0162] Therefore, in this embodiment, the carbon emissions saved due to the reduction of air conditioning load are calculated based on latent heat. The latent heat calculation is based on the Penman equation to eliminate the impedance coefficient (r a 、r s ), introduce the zero evaporation reference canopy, and get formula (6)-formula (7), according to the roof greening latent heat all acts on the air conditioning load reduction to calculate the carbon reduction NV OC , the calculation method refers to formula (8)-formula (9).

[0163] Since plant transpiration basically occurs on sunny days, the carbon reduction NV OC The calculation should be based on a typical day scale. In this embodiment, referring to the weather classification recommendations of the World Meteorological Organization (WMO), the carbon reduction NV OC It is calculated only on sunny summer days (cloud cover less than 2 / 8oktas and temperature above 25℃).

[0164] 3. Based on the sub-item data and core indicators, core data are obtained, and based on the core data, an evaluation result of the development potential of roof greening is obtained; wherein the core indicators include carbon payback period and overall carbon potential.

[0165] Obtain the embodied carbon baseline value calculated based on a 40-year life cycle and obtain the carbon sink NV CS 、Carbon emission reduction NV BS and Operational Carbon Reduction NV OC The annual average value of carbon recovery period and overall carbon potential are calculated by referring to formula (10) and formula (11), respectively.

[0166] The carbon coefficient method refers to "material usage (or maintenance methods, such as watering, pruning, etc.) × carbon emission coefficient". The carbon emission coefficient of materials can be found in the standard "carbon emission inventory" formulated by the ecological environment department; the carbon emission coefficient of maintenance methods needs to be converted by separate testing of water consumption, oil consumption, electricity consumption, etc.

[0167] Typical day: Calculate carbon sink NV CSA typical day refers to a sunny day selected each month as a typical day (referring to the World Meteorological Organization (WMO) regulations, a sunny day can be considered when the cloud cover is less than 2 / 8 oktas); calculate the carbon reduction NV OC A typical day is a sunny day with a temperature above 25°C (referring to the World Meteorological Organization (WMO) regulations, a sunny day can be considered when the cloud cover is less than 2 / 8oktas).

[0168] Embodiment 4

[0169] Based on the above embodiment, this embodiment provides a method for evaluating the development potential of roof greening, the method comprising:

[0170] Building a square array test platform based on core variables and roof greening, the square array test platform is used to evaluate the development potential of roof greening;

[0171] Obtain the life cycle of the roof greening, divide the life cycle into several stages, obtain a carbon sink accounting path based on all the stages and the core variables, and obtain sub-item indicators based on the accounting path, wherein the accounting path includes an embodied carbon path, a biological carbon sink path, a renewable energy path, and an operational carbon reduction path;

[0172] Obtaining breakdown of carbon potential;

[0173] Based on the sub-item data and core indicators, core data are obtained, and based on the core data, an evaluation result of the development potential of roof greening is obtained;

[0174] The breakdown includes the embodied carbon baseline NV EC 、Carbon sink NV CS 、Carbon emission reduction NV BS and Operational Carbon Reduction NV OC , the itemized data is obtained in the following way:

[0175] Based on the core variables, the green roof is divided to obtain several green roof classifications, and the embodied carbon quantity of the green roof is obtained. Based on the embodied carbon path, the green roof classification and the embodied carbon quantity, the embodied carbon baseline NV of each green roof classification is obtained. EC ;

[0176] Based on the biological carbon sink path and the square array test platform, the soil respiration of the roof greening is tested to obtain test parameters, and the carbon sink amount NV is obtained based on the test parameters. CS ;

[0177] The renewable energy path obtains the total amount of biomass, and the carbon emission reduction NV is obtained based on the total amount of biomass. BS ;

[0178] Based on the operation carbon reduction path, the canopy surface temperature of the green roof is obtained, based on the canopy surface temperature, the first net radiation is obtained, based on the radiation measurement device, the second net radiation of the canopy is obtained, and based on the first net radiation and the second net radiation, the latent heat flux is obtained; based on the latent heat flux, the air conditioning power consumption is obtained, and based on the air conditioning power consumption, the operation carbon reduction amount NV is obtained. OC .

[0179] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0180] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A system for evaluating the potential of green roof development, characterized in that: The system comprises: Platform unit: used to construct a square array test platform based on core variables and roof greening, and the square array test platform is used to evaluate the development potential of roof greening; Indicator unit: used to obtain the life cycle of the roof greening, divide the life cycle into several stages, obtain the carbon sink accounting path based on all the stages and the core variables, and obtain sub-item indicators based on the accounting path, wherein the accounting path includes an embodied carbon path, a biological carbon sink path, a renewable energy path, and an operational carbon reduction path; Calculation unit: used to obtain the sub-item data of carbon potential; Evaluation unit: used to obtain core data based on the sub-item data and core indicators, and obtain an evaluation result of the development potential of roof greening based on the core data; The breakdown includes the embodied carbon baseline NV EC 、Carbon sink NV CS 、Carbon emission reduction NV BS and Operational Carbon Reduction NV OC , the itemized data is obtained in the following way: Based on the core variables, the green roof is divided to obtain several green roof classifications, and the embodied carbon quantity of the green roof is obtained. Based on the embodied carbon path, the green roof classification and the embodied carbon quantity, the embodied carbon baseline NV of each green roof classification is obtained. EC ; Based on the biological carbon sink path and the square array test platform, the test box tests the soil respiration of the roof greening to obtain test parameters, and obtains the carbon sink amount NV based on the test parameters. CS ; The renewable energy path obtains the total amount of biomass, and the carbon emission reduction NV is obtained based on the total amount of biomass. BS ; Based on the operation carbon reduction path, the canopy surface temperature of the green roof is obtained, based on the canopy surface temperature, the first net radiation is obtained, based on the radiation measurement device, the second net radiation of the canopy is obtained, and based on the first net radiation and the second net radiation, the latent heat flux is obtained; based on the latent heat flux, the air conditioning power consumption is obtained, and based on the air conditioning power consumption, the operation carbon reduction amount NV is obtained. OC .

2. A roof greening development potential assessment system according to claim 1, characterized in that: The specific steps to obtain the test parameters include: Cover the test box with a mask, and based on a first preset time period and a preset time interval, obtain a first parameter of the test box based on a detection device; remove the mask of the test box, and based on a second preset time period and the preset time interval, obtain a second parameter of the test box based on the detection device, and obtain the test parameter based on the first parameter and the second parameter.

3. A roof greening development potential assessment system according to claim 2, characterized in that: The carbon sink amount NV is obtained based on the test parameters CS The specific steps include: Analyze the test parameters based on a gas analyzer to obtain CO2 concentration; Obtain the air temperature, atmospheric pressure and the size of the test box; obtain the unit carbon flux based on the atmospheric pressure, the CO2 concentration and the size; obtain the total carbon sink flux based on the unit carbon flux, the first preset time period and the second preset time period; obtain the carbon sink amount NV based on the total carbon sink flux CS .

4. A roof greening development potential assessment system according to claim 1, characterized in that: The core variables included substrate depth, plant species and drought stress.

5. A roof greening development potential assessment system according to claim 4, characterized in that: The specific steps to obtain several green roof classifications include: The green roof is divided based on the substrate depth to obtain all the green roof classifications, which include extensive green roof, semi-intensive green roof and intensive green roof.

6. A system for evaluating the potential of green roof development according to claim 5, characterized in that: The embodied carbon baseline values ​​of the extensive roof greening, the semi-intensive roof greening and the intensive roof greening are 45.26 kgCO2m -2 、92.36kg CO2m -2 and 148.59 kg CO2 m -2 .

7. A roof greening development potential assessment system according to claim 6, characterized in that: The square array test platform includes a plurality of test devices, each of which includes an iron frame and a planting table. The iron frame is connected to the planting table, a temperature measuring device is provided on the top of the iron frame, the planting table includes a plurality of enclosure panels and planting panels, the maintenance panel is connected to the planting panel, and the planting table has built-in thermal insulation cotton.

8. A system for evaluating the potential of green roof development according to claim 7, characterized in that: The specific steps to build a square array test platform include: Each planting board is installed with a substrate of different substrate depths, the substrate is used to plant plants of different plant species, the plants are divided into different drought stress levels, the substrate is pre-buried with an air box groove, and the air box groove is used to install the test box.

9. A system for evaluating the potential of green roof development according to claim 1, characterized in that: The sub-indicators include the normalized index of embodied carbon, the normalized index of biological carbon sink, the normalized index of renewable energy and the normalized index of operational carbon reduction. The core indicators include carbon payback period and overall carbon potential.

10. A method for evaluating the development potential of roof greening, characterized in that: The method comprises: Building a square array test platform based on core variables and roof greening, the square array test platform is used to evaluate the development potential of roof greening; Obtain the life cycle of the roof greening, divide the life cycle into several stages, obtain a carbon sink accounting path based on all the stages and the core variables, and obtain sub-item indicators based on the accounting path, wherein the accounting path includes an embodied carbon path, a biological carbon sink path, a renewable energy path, and an operational carbon reduction path; Obtaining breakdown of carbon potential; Based on the sub-item data and core indicators, core data are obtained, and based on the core data, an evaluation result of the development potential of roof greening is obtained; The breakdown includes the embodied carbon baseline NV EC 、Carbon sink NV CS 、Carbon emission reduction NV BS and Operational Carbon Reduction NV OC , the itemized data is obtained in the following way: Based on the core variables, the green roof is divided to obtain several green roof classifications, and the embodied carbon quantity of the green roof is obtained. Based on the embodied carbon path, the green roof classification and the embodied carbon quantity, the embodied carbon baseline NV of each green roof classification is obtained. EC ; Based on the biological carbon sink path and the square array test platform, the soil respiration of the roof greening is tested to obtain test parameters, and the carbon sink amount NV is obtained based on the test parameters. CS ; The renewable energy path obtains the total amount of biomass, and the carbon emission reduction NV is obtained based on the total amount of biomass. BS ; Based on the operation carbon reduction path, the canopy surface temperature of the green roof is obtained, based on the canopy surface temperature, the first net radiation is obtained, based on the radiation measurement device, the second net radiation of the canopy is obtained, and based on the first net radiation and the second net radiation, the latent heat flux is obtained; based on the latent heat flux, the air conditioning power consumption is obtained, and based on the air conditioning power consumption, the operation carbon reduction amount NV is obtained. OC .

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