Full-life-cycle carbon footprint accounting method and accounting device for combined cooling heating and power system coupled with biomass resources and readable storage medium

Abstract

The invention provides a full-life-cycle carbon footprint accounting method and accounting device for a combined cooling heating and power system coupled with biomass resources and a readable storage medium, and belongs to the technical field of energy utilization. The carbon footprint accounting method comprises the following steps: determining a first carbon emission amount of the combined cooling heating and power system in a fuel processing stage; determining the second carbon emission of the combined cooling heating and power system in the combined cooling heating and power treatment stage; determining the third carbon emission of the combined cooling heating and power system in the tail gas treatment stage; and determining the carbon footprint of the combined cooling heating and power system in the whole life cycle according to the first carbon emission, the second carbon emission and the third carbon emission. According to all carbon emission sources of the combined cooling heating and power system coupled with the biomass resources in the whole life cycle, the carbon footprint of the combined cooling heating and power system is determined, and therefore a comprehensive and accurate carbon footprint accounting mode is provided.

Description

Technical Field

[0001] The present invention relates to the technical field of energy utilization, and in particular to a full life cycle carbon footprint accounting method, an accounting device and a readable storage medium for a combined cooling, heating and power system coupled with biomass resources. Background Art

[0002] Combined Cooling, Heating and Power (CCHP) is an efficient energy comprehensive utilization system. It is based on the concept of energy cascade utilization and integrates the processes of power generation, heating and cooling (including hot water supply).

[0003] The combined heat, cooling and power system first converts high-temperature thermal energy (such as heat energy generated by gas turbines or internal combustion engines burning natural gas) into electrical energy to meet electricity demand. At the same time, the waste heat generated during the power generation process (including high-temperature flue gas and cooling water, etc.) is further recycled and utilized, part of which is used for heating, and the other part is converted into cold energy through refrigeration technology to meet cooling needs. This system realizes the cascade utilization of energy, that is, high-grade thermal energy is used for power generation first, and low-grade thermal energy is used for heating and cooling.

[0004] The combined heat and power system usually consists of the following parts: power generation equipment such as gas turbines and internal combustion engines, which are responsible for converting the heat energy generated by fuel combustion into electrical energy; waste heat recovery equipment such as waste heat boilers and heat exchangers, which are used to recover the waste heat generated in the power generation process; heating equipment such as hot water boilers and radiators, which convert the recovered waste heat into thermal energy for heating; refrigeration equipment such as absorption refrigerators and compression refrigerators, which use the recovered waste heat as a driving heat source to generate cold energy to meet cooling needs.

[0005] The combined heat and power system greatly improves the energy utilization efficiency through the cascade utilization of energy. The power generation efficiency can reach more than 50%, and the overall energy utilization rate of the system can exceed 70%, or even more than 90%. In addition, since the system reduces the direct combustion of fossil fuels and the energy loss during long-distance power transmission, it can significantly reduce the emission of carbides and harmful gases, which is beneficial to environmental protection. At present, the combined heat and power system has been widely used in the steel, petrochemical, electric power, construction and other industries.

[0006] Carbon footprint is a concept used to measure the sum of greenhouse gas (mainly carbon dioxide) emissions and removals caused directly or indirectly by a specific object within a certain period of time, usually expressed in carbon dioxide equivalent. Carbon footprint not only reflects the impact of human activities on the environment, but also provides an important reference for achieving greenhouse gas emission reduction.

[0007] By calculating the carbon footprint of the CHP system, the greenhouse gas emissions generated by the CHP system during operation can be accurately measured. This quantitative assessment provides specific environmental performance indicators for the system, which helps to fully understand its environmental impact. In addition, during the accounting process, the carbon emission sources of each link within the system can be identified, including direct and indirect emissions in the power generation, heating, cooling and other processes. This helps to identify high-carbon emission links and provide a clear direction for subsequent emission reduction measures.

[0008] In the context of global response to climate change, countries are actively promoting policies and technologies to reduce carbon emissions. The combined heat and power system improves the comprehensive utilization efficiency of energy by providing electricity, heat and cold energy at the same time, and is one of the effective ways to achieve low carbon emissions. However, traditional combined heat and power systems usually rely on fossil fuels and have high carbon emissions. To this end, the combination of renewable energy (such as biomass, solar energy) and fossil fuel mixed combustion technology can effectively reduce the carbon footprint.

[0009] The combined heat and power system coupled with biomass resources is a highly efficient energy system that combines biomass energy utilization technology with the combined heat and power system. For the combined heat and power system coupled with biomass resources, one of the shortcomings of the existing technology is that it is impossible to calculate the carbon footprint of the combined heat and power system of mixed combustion biomass products throughout the life cycle. In particular, in a system where multiple energy sources are used in a complementary manner, there is still a lack of effective methods for accurately calculating the carbon emissions of different energy flows. Summary of the invention

[0010] One of the problems solved by the present invention is how to provide a comprehensive and accurate full life cycle carbon footprint accounting method, an accounting device and a readable storage medium for a combined heat and power system coupled with biomass resources.

[0011] In order to solve at least one of the above problems, the present invention provides a full life cycle carbon footprint accounting method for a combined cooling, heating and power system coupled with biomass resources, the carbon footprint accounting method comprising:

[0012] Determine the first carbon emissions of the CHP system during the fuel processing stage;

[0013] Determine the secondary carbon emissions of the CHP system during the CHP process stage;

[0014] Determine the third carbon emissions of the combined cooling, heating and power system in the tail gas treatment stage;

[0015] Based on the first carbon emissions, the second carbon emissions and the third carbon emissions, the carbon footprint of the combined heat and power system over its entire life cycle is determined.

[0016] In any of the above technical solutions, determining the first carbon emission of the combined cooling, heating and power system in the fuel processing stage specifically includes:

[0017] The first carbon emissions are determined based on the carbon emissions of the cogeneration system in the biomass fuel processing process, the natural gas fuel processing process, and the photovoltaic and solar thermal system construction process.

[0018] In any of the above technical solutions, the carbon emissions of the biomass fuel processing process include: carbon emissions from the biomass fuel collection process, carbon emissions from the biomass fuel transportation process, carbon emissions from the biomass fuel pretreatment process, and carbon emissions from the biomass fuel gasification process; among which, the carbon emissions of the biomass fuel processing process are determined based on the biomass energy consumption level and the biomass carbon emission coefficient of the biomass fuel processing process.

[0019] In any of the above technical solutions, the carbon emissions from the natural gas fuel processing process include: carbon emissions from the natural gas fuel extraction process, carbon emissions from the natural gas fuel processing process, carbon emissions from the natural gas fuel transportation process, and carbon emissions from the natural gas fuel storage process; among them, the carbon emissions from the natural gas fuel processing process are determined based on the natural gas energy consumption level and the natural gas carbon emission coefficient of the natural gas fuel processing process.

[0020] In any of the above technical solutions, the carbon emissions during the construction of photovoltaic and solar thermal systems include: carbon emissions during the production of photovoltaic and solar thermal systems, carbon emissions during the transportation of photovoltaic and solar thermal systems, and carbon emissions during the installation of photovoltaic and solar thermal systems; among them, the carbon emissions during the construction of photovoltaic and solar thermal systems are determined through a full life cycle analysis method.

[0021] In any of the above technical solutions, determining the second carbon emissions of the combined cooling, heating and power system in the combined cooling, heating and power processing stage specifically includes:

[0022] Determine the second carbon emission amount according to the carbon emission amount of the combined cooling, heating and power system in the power generation process, the energy supply process and the waste heat recovery and utilization process respectively;

[0023] Among them, the power generation process includes the energy mixed combustion power generation process and / or the combined power generation process, and the energy supply process includes the cooling process and / or the heating process.

[0024] In any of the above technical solutions, the third carbon emission of the combined cooling, heating and power system in the tail gas treatment stage is determined, specifically including:

[0025] The third carbon emissions are determined based on the carbon emissions of the cogeneration system in the flue gas purification process and the tail gas emission process respectively.

[0026] In any of the above technical solutions, the carbon emissions of the flue gas purification process include: carbon emissions from the flue gas desulfurization process, carbon emissions from the flue gas denitrification process, and carbon emissions from the flue gas dust removal process; wherein, the carbon emissions of the flue gas purification process are determined according to the type of chemical reaction and the degree of energy consumption in the flue gas purification process; and / or the carbon emissions of the flue gas emission process include: carbon emissions of unpurified pollutants and secondary carbon emissions of the pollutant purification process.

[0027] The present invention also provides a full life cycle carbon footprint accounting device for a combined cooling, heating and power system coupled with biomass resources, the carbon footprint accounting device comprising:

[0028] A first processing module, the first processing module is used to determine a first carbon emission amount of the combined cooling, heating and power system in a fuel processing stage;

[0029] A second processing module, the second processing module is used to determine the second carbon emission of the cogeneration system in the cogeneration processing stage;

[0030] A third processing module, the third processing module is used to determine the third carbon emission of the combined cooling, heating and power system in the tail gas treatment stage;

[0031] The carbon footprint calculation module is used to determine the carbon footprint of the combined heating, cooling and power system over its entire life cycle based on the first carbon emissions, the second carbon emissions and the third carbon emissions.

[0032] The present invention also provides a readable storage medium, on which a program or instruction is stored. When the program or instruction is executed by a processor, the steps of the full life cycle carbon footprint accounting method as described in any of the above technical solutions are implemented.

[0033] Beneficial Effects

[0034] The present invention provides a full life cycle carbon footprint accounting method, an accounting device and a readable storage medium for a combined heat and power system coupled with biomass resources. The carbon footprint accounting method first determines the first carbon emission of the combined heat and power system in the fuel processing stage, the second carbon emission of the combined heat and power system in the combined heat and power processing stage, and the third carbon emission of the combined heat and power system in the tail gas processing stage, and then determines the carbon footprint of the combined heat and power system in the full life cycle according to the first carbon emission, the second carbon emission and the third carbon emission. The present invention can comprehensively and accurately calculate the full life cycle carbon footprint of the combined heat and power system coupled with biomass resources. The method can effectively evaluate the carbon emissions of the combined heat and power system of mixed combustion of biomass and other energy sources (such as natural gas, solar energy, etc.), and is suitable for the optimization design and carbon footprint management of low-carbon energy systems. By comprehensively analyzing the carbon emissions of different energy flows in the multi-energy complementary system and optimizing the design, the carbon footprint accounting method of the present invention can improve the overall efficiency of the combined heat and power system and reduce the carbon footprint. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of one of the energy conversion modes of biomass resources in the combined cooling, heating and power system of an embodiment of the present invention;

[0036] Figure 2 This is a second schematic diagram of the energy conversion method of biomass resources in the combined cooling, heating and power system of an embodiment of the present invention;

[0037] Figure 3 A schematic diagram of the structure of a combined cooling, heating and power system according to an embodiment of the present invention;

[0038] Figure 4 A flowchart of the steps of the carbon footprint calculation method according to an embodiment of the present invention;

[0039] Figure 5 Schematic diagram of the life cycle of a combined cooling, heating and power system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the following is a detailed description of the specific embodiments of the present invention.

[0041] Figure 1 FIG. 1 is a schematic diagram of a method for converting energy from biomass resources in a combined cooling, heating and power generation system according to an embodiment of the present invention. Figure 1 As shown in the figure, biomass resources such as crop straw, forestry residues and energy plants, livestock manure, and domestic garbage can be used in a variety of ways. For example, biomass resources can be used for direct combustion, anaerobic fermentation or gasification as fuel, liquefied into energy such as biodiesel or fuel ethanol, or compressed and solidified into solid fuel.

[0042] Figure 2 This is a second schematic diagram of the energy conversion method of biomass resources in the combined cooling, heating and power system of the embodiment of the present invention. Figure 2 As shown, after being processed by steam boilers, steam turbines, pulverizers and other equipment, biomass resources can be used in a variety of energy cogeneration systems for power generation, heat storage or refrigeration, achieving cogeneration of heat, cooling and power.

[0043] The combined heat and power system using coupled biomass resources is a highly efficient energy system that combines biomass energy utilization technology with the combined heat and power system. This system, through the rational use of biomass resources, not only takes advantage of the large reserves, wide distribution, renewable, low pollution, and diverse utilization of biomass resources, but also overcomes the problem of poor system stability caused by the inherent temporal and spatial instability of renewable energy.

[0044] Although the combined heat, cooling and power system using coupled biomass resources can combine biomass energy utilization technology with the combined heat, cooling and power system to achieve comprehensive energy utilization, as a system that uses multiple energy sources in a complementary manner, how to accurately calculate the carbon footprint of different energy flows is a technical problem that needs to be solved.

[0045] In order to accurately calculate the carbon footprint of a combined cooling, heating and power system for coupling biomass resources, the present invention provides a full life cycle carbon footprint calculation method, which includes:

[0046] S100, determining the first carbon emission of the combined cooling, heating and power system in the fuel processing stage;

[0047] S200, determining the second carbon emission of the cogeneration system in the cogeneration process stage;

[0048] S300, determining the third carbon emission of the combined cooling, heating and power system in the tail gas treatment stage;

[0049] S400: Determine the carbon footprint of the combined cooling, heating and power system over its entire life cycle based on the first carbon emission, the second carbon emission and the third carbon emission.

[0050] Among them, considering that the fuel processing stage includes the preparation of biomass products, the extraction and transportation of natural gas, the production and installation of photovoltaic and solar thermal systems, etc., accordingly, the first carbon emissions of the combined heat and power system in the fuel processing stage in S100 of the present invention are determined specifically including:

[0051] S110. Determine a first carbon emission amount according to the carbon emissions of the combined heat, cooling and power system in a biomass fuel processing process, a natural gas fuel processing process, and a photovoltaic and solar thermal system construction process.

[0052] In the above process, taking into account the characteristics of each process, the accounting logic adopted by the present invention for the carbon emissions of each process is as follows: in the stage of biomass fuel preparation, the sources of carbon emissions include biomass collection, transportation, pretreatment and gasification processes. Therefore, the carbon footprint of the biomass fuel preparation process is calculated by analyzing the energy consumption and carbon emission coefficient of each link; in the stage of natural gas fuel processing, it covers the processes of natural gas extraction, processing, transportation and storage, and its carbon emission accounting needs to be calculated based on the energy consumption data and carbon emission coefficient of each stage; in the stage of photovoltaic and solar thermal system production and installation, it includes the production, transportation and installation processes of photovoltaic panels and thermal collectors, so it is necessary to calculate the carbon emissions of each link through the life cycle analysis (LCA) method.

[0053] In other words, in some embodiments of the present invention, the carbon emissions of the biomass fuel processing process include: carbon emissions of the biomass fuel collection process, carbon emissions of the biomass fuel transportation process, carbon emissions of the biomass fuel pretreatment process, and carbon emissions of the biomass fuel gasification process; wherein, the carbon emissions of the biomass fuel processing process are determined according to the biomass energy consumption level and the biomass carbon emission coefficient of the biomass fuel processing process; and / or the carbon emissions of the natural gas fuel processing process include: carbon emissions of the natural gas fuel mining process, carbon emissions of the natural gas fuel processing process, carbon emissions of the natural gas fuel transportation process, and carbon emissions of the natural gas fuel storage process; wherein, the carbon emissions of the natural gas fuel processing process are determined according to the natural gas energy consumption level and the natural gas carbon emission coefficient of the natural gas fuel processing process; and / or the carbon emissions of the photovoltaic and solar thermal system construction process include: carbon emissions of the photovoltaic and solar thermal system production process, carbon emissions of the photovoltaic and solar thermal system transportation process, and carbon emissions of the photovoltaic and solar thermal system installation process; wherein, the carbon emissions of the photovoltaic and solar thermal system construction process are determined by a full life cycle analysis method.

[0054] For the carbon emission accounting of the cogeneration treatment stage, considering that the energy in the cogeneration treatment stage will generate electricity, cold energy and heat energy after mixed combustion or combined power generation, and this stage also includes the process of waste heat recovery and utilization, accordingly, S200 determines the second carbon emission of the cogeneration system in the cogeneration treatment stage, specifically including:

[0055] S210, determining a second carbon emission amount according to the carbon emission amounts of the combined cooling, heating and power system in the power generation process, the energy supply process and the waste heat recovery process respectively;

[0056] Among them, the power generation process includes the energy mixed combustion power generation process and / or the combined power generation process, and the energy supply process includes the cooling process and / or the heating process.

[0057] For energy co-combustion or combined power generation, it is necessary to calculate the carbon emissions generated by the fuel during the power generation process, including the carbon emissions from the co-combustion of biomass and natural gas. The carbon footprint accounting method of the analytical method calculates the carbon footprint of the three energy flows of cooling, heating and electricity. Exergy refers to the energy that can be infinitely converted into any other energy form when the system changes reversibly from an arbitrary state to a state in equilibrium with a given environment. Also called effective energy), then according to The carbon emissions of each energy flow are calculated based on the distribution. For the cooling and heating stages, since the waste heat of the internal combustion engine can be used for cooling and heating through equipment such as double-effect absorption heat pumps (AHP), it is necessary to calculate the carbon emissions of cold water and hot water in the cooling and heating process, and the operating conditions and energy efficiency of the relevant equipment need to be specifically considered. For the waste heat recovery process, the waste heat generated by power generation equipment and AHP can be recovered by heat exchangers. The carbon emission accounting of this process is based on the utilization efficiency and recovery efficiency of the waste heat.

[0058] Considering that the carbon in the CHP system is composed of biomass and natural gas fuels, from the perspective of only the CHP system, biomass is renewable like solar energy and has no carbon emissions. However, due to its multiple processing processes, its upstream carbon footprint is not zero. The carbon footprint of biomass generally includes raw material production, pretreatment, transportation, utilization and slag return to the field, among which the utilization process is gasification in the gasifier and combustion in the internal combustion engine. The carbon footprint of natural gas includes carbon emissions during mining, processing and transmission. As liquefied natural gas, there are other liquefaction and regasification processes. The carbon footprint of equipment contains the total carbon footprint of raw material procurement, equipment manufacturing and transportation. Carbon emissions come from the fuel and electricity consumed in these processes. The raw materials in these components consider steel, aluminum, copper, polyvinyl chloride and glass, and the amount of materials is determined according to the capacity of the equipment.

[0059] Figure 3 FIG. 1 is a schematic diagram of the structure of the combined cooling, heating and power system according to an embodiment of the present invention. Figure 3 The equipment corresponding to each process has the following correspondence between its full name and abbreviation: gasifier G, first heat exchanger HX-01, natural gas processing unit GC, gas tank GH, internal combustion engine ICE, absorption heat pump AHP, second heat exchanger HX-02, solar energy comprehensive utilization device C-PV / T.

[0060] See also Figure 3 Based on the above logic, the present invention provides examples of specific calculation methods for the carbon emissions of the combined heat and power system in the power generation process, energy supply process and waste heat recovery process, as follows.

[0061] (a) Gasifier:

[0062] D4=D1+D2+Y G (1)

[0063] D1=d1Ex1 (2)

[0064] D2=0 (3)

[0065] D G =α G Q G,nom (4)

[0066] Where D4 represents Figure 3 Units of Process 4 Carbon content (kg CO2-eq);

[0067] Y G is the levelized carbon content of the gasifier (i.e., equipment G) (kg CO2-eq);

[0068] d1 is the carbon footprint per unit energy of the gasifier (kg CO2-eq / kWh);

[0069] Ex1 is the gasifier (kWh);

[0070] D G Carbon footprint of gasifier production (kg CO2-eq);

[0071] α G is the carbon footprint per unit capacity of the gasifier (kg CO2-eq / kW);

[0072] Q G，nom It is the calorific value of the heat combustion of the gasifier.

[0073] It should be noted that the meanings of the variables in the following equations of the present invention are the same as those of the variables in the above formulas for the gasifier, except that they only need to be replaced with the corresponding equipment and paths, such as D XX express Figure 3 The unit of the corresponding equipment in the corresponding process XX Carbon content, Y XX It is the levelized carbon content of the equipment corresponding to process XX, which will not be elaborated in the following text.

[0074] (b) HX-01 first heat exchanger:

[0075] D 14 -D 13 =D4-D5+Y HX-01 (5)

[0076]

[0077] D HX =α HX Q HX,nom (7)

[0078] (c) Gas conditioning (GC) natural gas processing unit:

[0079] D7=D5+Y GC (8)

[0080] D GC =α GC Q G,nom (9)

[0081] (d) Gas holder (GH)

[0082] D9=D7+D8+Y GH (10)

[0083] D8=d8Ex8=d NG v NG (11)

[0084] D GH =α GH Q GH,nom (12)

[0085] vNatural gas volume flow (Nm 3 / h)

[0086] (e) Internal Combustion Engine ICE:

[0087] D 11 +(D 12 -D 18 )+D 19 =D9+D 10 +Y ICE (13)

[0088] D 10 =0 (14)

[0089]

[0090] D ICE =α ICE E ICE,nom (16)

[0091] (f) AHP absorption heat pump:

[0092] (D 23 -D 22 )+(D 25 -D 24 )=(D15 -D 14 )+(D 20 -D 19 )+Y AHP (17)

[0093]

[0094] D AHP =α AHP Q c,nom (20)

[0095] Heat pump cooling:

[0096] D 25 -D 24 =0 (21)

[0097] Heat pump heating:

[0098] D 23 -D 22 =0 (22)

[0099] (g) HX-02 second heat exchanger:

[0100] D 17 -D 16 =D 21 -D 20 +Y HX-02 (twenty three)

[0101] D 21 =0 (24)

[0102] (h) C-PV / T solar photovoltaic / photothermal comprehensive utilization device:

[0103] D 29 +(D 26 -D 27 )=D 28 +Y PV / T (25)

[0104]

[0105] D 28 =0 (27)

[0106] D PV / T =α PV / T F PV / T += PV / T E pv,nom (28)

[0107] (i) Intersection point

[0108] D 30 =D 11+D 29 (29)

[0109] D 13 =D 12 +D 17 +D 26 (30)

[0110] (j) Separation point

[0111] D 16 +D 18 +D 27 =D 15 (31)

[0112]

[0113] The loss of exhaust gas to the atmosphere is allocated by the upstream group products. e , thermal energy h and cold energy c Unit The carbon content can be expressed as: kg CO2-eq / (kWh exergy)

[0114]

[0115] For example, using the above calculation formula, in cooling mode, the biomass energy input to the system is 600kWh, the natural gas energy is 300kWh, and the solar energy is 500kWh. The system output power is 260kWh, and the cooling capacity is 480kWh. 690kWh, natural gas 294kWh, solar The system output is 466kWh. The cooling capacity is 260kWh. The carbon footprint of natural gas is 0.07296kg CO2-eq / MJ; the carbon footprint of biomass is 0.05196kgCO2-eq / MJ. The carbon flow rates representing the output electrical energy are 0.7302kg CO2-eq / (kWh energy) and 0.7302kg CO2-eq / (kWh exergy) respectively; The carbon flow rates representing the output cooling capacity are 0.4210 kg CO2-eq / (kWh energy) and 7.6506 kg CO2-eq / (kWh exergy) respectively.

[0116] Finally, considering that the exhaust gas treatment stage involves the purification and treatment process of flue gas in the cogeneration system, the specific calculation method is as follows: the flue gas purification stage includes flue gas desulfurization, denitrification, dust removal and other treatment processes. Therefore, the carbon emission accounting based on each treatment process is based on the chemical reaction equation and energy consumption; the exhaust gas emission stage needs to calculate the emission carbon footprint after exhaust gas treatment, including the emission of unpurified pollutants and the secondary carbon emissions generated during the treatment process.

[0117] Accordingly, S300 determines the third carbon emission of the combined cooling, heating and power system in the tail gas treatment stage, specifically including:

[0118] S310. Determine a third carbon emission amount according to the carbon emission amounts of the combined cooling, heating and power system in the flue gas purification process and the tail gas emission process respectively.

[0119] In some embodiments of the present invention, the carbon emissions of the flue gas purification process include: carbon emissions from the flue gas desulfurization process, carbon emissions from the flue gas denitrification process, and carbon emissions from the flue gas dust removal process; wherein, the carbon emissions of the flue gas purification process are determined according to the type of chemical reaction and the degree of energy consumption in the flue gas purification process; and / or the carbon emissions of the flue gas emission process include: carbon emissions of unpurified pollutants and secondary carbon emissions of the pollutant purification process.

[0120] Figure 4 FIG. 1 is a flow chart of the steps of the carbon footprint calculation method according to an embodiment of the present invention. Figure 4 As shown, the present invention divides the carbon footprint calculation method of the whole life cycle of the combined heat and power system coupled with biomass resources into three stages, and constructs a carbon footprint calculation method for the fuel processing stage. The analytical method constructs the carbon footprint accounting method for the combined heat and power stage, and the carbon footprint accounting method for the exhaust gas treatment stage, thereby realizing the calculation of the actual operation carbon footprint of the combined heat and power system.

[0121] Figure 5 FIG. 1 is a schematic diagram of the life cycle of a combined cooling, heating and power system according to an embodiment of the present invention. Figure 5 As shown, the present invention divides the carbon footprint of the combined cooling, heating and power system using coupled biomass resources into multiple stages, and each stage is divided into multiple processes according to its own characteristics and conditions. Since the carbon emissions of each stage are calculated independently, the present invention can improve the accuracy of the carbon footprint calculation of the combined cooling, heating and power system in the whole life cycle.

[0122] Since the method of the present invention takes into account all carbon emission sources of the combined cooling, heating and power system in the entire life cycle, it provides a comprehensive and accurate carbon footprint accounting strategy. The analysis method can more scientifically allocate the carbon emissions of the three energy flows of cold, heat and electricity, and improve the accuracy of the calculation. Finally, the present invention is not only applicable to the mixed combustion of biomass and natural gas, but can also be promoted and applied to other renewable energy and fossil fuel combination systems, and has broad application prospects.

[0123] The present invention also provides a full life cycle carbon footprint accounting device for a combined heat, cooling and power system coupled with biomass resources, the carbon footprint accounting device comprising: a first processing module, the first processing module is used to determine a first carbon emission of the combined heat, cooling and power system in a fuel processing stage; a second processing module, the second processing module is used to determine a second carbon emission of the combined heat, cooling and power system in a combined heat, cooling and power processing stage; a third processing module, the third processing module is used to determine a third carbon emission of the combined heat, cooling and power system in an exhaust gas processing stage; a carbon footprint accounting module, the carbon footprint accounting module is used to determine the carbon footprint of the combined heat, cooling and power system in its full life cycle based on the first carbon emission, the second carbon emission and the third carbon emission.

[0124] The full life cycle carbon footprint accounting device for a combined heat and power system coupled with biomass resources of the present invention implements the full life cycle carbon footprint accounting method of the present invention, and its specific accounting method and beneficial effects are not repeated here.

[0125] The present invention also provides a readable storage medium, which stores a program or instruction. When the program or instruction is executed by a processor, the steps of the full life cycle carbon footprint accounting method as described in any of the above technical solutions are implemented.

[0126] It should be noted that, in this article, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise one..." do not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0127] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods of each embodiment of the present application.

[0128] The embodiments of the present application are described above in conjunction with the accompanying drawings, but the present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A method for calculating the carbon footprint of a combined cooling, heating and power system coupled with biomass resources throughout its life cycle, characterized in that: The carbon footprint calculation method includes: Determining a first carbon emission amount of the combined cooling, heating and power system in a fuel processing stage; Determining a second carbon emission amount of the combined cooling, heating and power system in a combined cooling, heating and power processing stage; Determining the third carbon emission of the combined cooling, heating and power system in the tail gas treatment stage; The carbon footprint of the combined cooling, heating and power system over its entire life cycle is determined based on the first carbon emissions, the second carbon emissions and the third carbon emissions.

2. The method for calculating the carbon footprint of a whole life cycle according to claim 1, characterized in that: The determining of the first carbon emission of the combined cooling, heating and power system in the fuel processing stage specifically includes: The first carbon emissions are determined according to the carbon emissions of the combined heat, cooling and power system during the biomass fuel processing process, the natural gas fuel processing process, and the photovoltaic and solar thermal system construction process.

3. The method for calculating the carbon footprint of a whole life cycle according to claim 2, characterized in that: The carbon emissions of the biomass fuel processing process include: carbon emissions from the biomass fuel collection process, carbon emissions from the biomass fuel transportation process, carbon emissions from the biomass fuel pretreatment process, and carbon emissions from the biomass fuel gasification process; wherein the carbon emissions of the biomass fuel processing process are determined based on the biomass energy consumption level and the biomass carbon emission coefficient of the biomass fuel processing process.

4. The method for calculating the carbon footprint of a whole life cycle according to claim 2, characterized in that: The carbon emissions of the natural gas fuel processing process include: carbon emissions from the natural gas fuel extraction process, carbon emissions from the natural gas fuel processing process, carbon emissions from the natural gas fuel transportation process, and carbon emissions from the natural gas fuel storage process; wherein, the carbon emissions of the natural gas fuel processing process are determined based on the natural gas energy consumption level and the natural gas carbon emission coefficient of the natural gas fuel processing process.

5. The method for calculating the carbon footprint of a whole life cycle according to claim 2, characterized in that: The carbon emissions during the construction of the photovoltaic and solar thermal systems include: carbon emissions during the production of the photovoltaic and solar thermal systems, carbon emissions during the transportation of the photovoltaic and solar thermal systems, and carbon emissions during the installation of the photovoltaic and solar thermal systems; among which, the carbon emissions during the construction of the photovoltaic and solar thermal systems are determined through a full life cycle analysis method.

6. The method for calculating the carbon footprint of a whole life cycle according to claim 1, characterized in that: The determining of the second carbon emission of the cogeneration system in the cogeneration process stage specifically includes: Determining the second carbon emission amount according to the carbon emission amounts of the combined cooling, heating and power system in the power generation process, the energy supply process and the waste heat recovery process respectively; Among them, the power generation process includes an energy mixed combustion power generation process and / or a combined power generation process, and the energy supply process includes a cooling process and / or a heating process.

7. The method for calculating the carbon footprint of the entire life cycle according to any one of claims 1 to 6, characterized in that: The determining of the third carbon emission of the combined cooling, heating and power system in the tail gas treatment stage specifically includes: The third carbon emission is determined according to the carbon emission of the combined cooling, heating and power system in the flue gas purification process and the tail gas emission process respectively.

8. The method for calculating the carbon footprint of a whole life cycle according to claim 7, characterized in that: The carbon emissions of the flue gas purification process include: carbon emissions of flue gas desulfurization process, carbon emissions of flue gas denitrification process, and carbon emissions of flue gas dust removal process; wherein the carbon emissions of the flue gas purification process are determined according to the type of chemical reaction and the degree of energy consumption of the flue gas purification process; and / or The carbon emissions in the flue gas emission process include: carbon emissions from unpurified pollutants and secondary carbon emissions from the pollutant purification process.

9. A device for calculating the carbon footprint of a combined cooling, heating and power system coupled with biomass resources throughout its life cycle, characterized in that: The carbon footprint calculation device comprises: A first processing module, the first processing module is used to determine a first carbon emission of the combined cooling, heating and power system in a fuel processing stage; A second processing module, the second processing module is used to determine a second carbon emission of the cogeneration system in a cogeneration processing stage; A third processing module, the third processing module is used to determine the third carbon emission of the combined cooling, heating and power system in the tail gas processing stage; A carbon footprint calculation module, wherein the carbon footprint calculation module is used to determine the carbon footprint of the combined cooling, heating and power system over its entire life cycle based on the first carbon emissions, the second carbon emissions and the third carbon emissions.

10. A readable storage medium, characterized in that: The readable storage medium stores a program or instruction, and when the program or instruction is executed by the processor, the steps of the full life cycle carbon footprint accounting method as described in any one of claims 1 to 8 are implemented.

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