Comprehensive evaluation method and system for industrial waste heat utilization effect

Abstract

The invention provides a comprehensive evaluation method and system for an industrial waste heat utilization effect, and the method comprises the steps: obtaining a to-be-evaluated waste heat utilization technology, and constructing a corresponding energy conversion model for the to-be-evaluated waste heat utilization technology; energy output corresponding to the waste heat utilization technology to be evaluated is obtained through the energy conversion model, and corresponding evaluation parameters are obtained; and obtaining an evaluation index of the waste heat utilization technology to be evaluated based on the energy output and the evaluation parameter, and comprehensively evaluating the industrial waste heat utilization effect according to the evaluation index. According to the comprehensive evaluation method and evaluation index for industrial waste heat utilization, the comprehensive evaluation method for the waste heat utilization effect can be provided by integrating multiple factors such as energy efficiency, economy, carbon emission reduction, regional policies and the environment, optimization matching of waste heat resources and the waste heat utilization technology is better guided, and the economic benefit is improved. And popularization and utilization of waste heat resources are promoted.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial waste heat utilization, and in particular to a comprehensive evaluation method and system for industrial waste heat utilization effects. Background Art

[0002] Industrial waste heat is widely generated in various fields of industrial production. As a natural clean energy, waste heat resources are abundant in total amount and have considerable potential. If they are widely used in various production fields such as power generation and heating, they can save a lot of fossil energy consumption and effectively reduce carbon emissions. This has great strategic significance for achieving the "dual carbon" goals of energy and electricity and ensuring national energy security.

[0003] There are many different utilization technologies for waste heat resources in different forms and temperature zones, such as heat pump refrigeration, heat pump heating, organic Rankine cycle, and steam power cycle. However, there is currently little work on the evaluation of waste heat utilization effects. In most applications, the waste heat utilization effect is evaluated based on a single indicator such as energy efficiency or economic benefit. It has not yet integrated multiple factors such as energy efficiency, economy, carbon emission reduction, regional policies, and environment, and cannot provide an evaluation method that gives a comprehensive and comprehensive evaluation of the waste heat utilization effect. The lack of evaluation in this aspect affects the optimal matching of waste heat resources and waste heat utilization technologies, and limits the promotion and utilization of waste heat resources. Summary of the invention

[0004] The purpose of the present invention is to provide a comprehensive evaluation method and system for the utilization effect of industrial waste heat, aiming to solve the problem that the evaluation of the utilization effect of waste heat resources in the prior art is single and cannot integrate various factors to achieve comprehensive evaluation.

[0005] The embodiment of the present invention provides a comprehensive evaluation method for the utilization effect of industrial waste heat, including:

[0006] Acquire a waste heat utilization technology to be evaluated, and construct a corresponding energy conversion model for the waste heat utilization technology to be evaluated;

[0007] Obtaining the energy output corresponding to the waste heat utilization technology to be evaluated through the energy conversion model, and obtaining corresponding evaluation parameters; and

[0008] An evaluation index of the waste heat utilization technology to be evaluated is obtained based on the energy output and the evaluation parameters, and a comprehensive evaluation of the industrial waste heat utilization effect is performed according to the evaluation index.

[0009] The embodiment of the present invention provides a comprehensive evaluation system for industrial waste heat utilization effect, including:

[0010] A construction module, used to obtain the waste heat utilization technology to be evaluated, and to construct a corresponding energy conversion model for the waste heat utilization technology to be evaluated;

[0011] A data module, used to obtain the energy output corresponding to the waste heat utilization technology to be evaluated through the energy conversion model, and obtain corresponding evaluation parameters; and

[0012] An evaluation module is used to obtain an evaluation index of the waste heat utilization technology to be evaluated based on the energy output and the evaluation parameters, and to conduct a comprehensive evaluation of the industrial waste heat utilization effect according to the evaluation index.

[0013] An embodiment of the present invention also provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps of the above-mentioned comprehensive evaluation method for the utilization effect of industrial waste heat when executed by the processor.

[0014] An embodiment of the present invention further provides a computer-readable storage medium, on which a program for implementing information transmission is stored. When the program is executed by a processor, the steps of the above-mentioned comprehensive evaluation method for the utilization effect of industrial waste heat are implemented.

[0015] The use of the embodiments of the present invention may include the following beneficial effects: the embodiments of the present invention provide a comprehensive evaluation method and evaluation indicators for industrial waste heat utilization, which can comprehensively consider energy efficiency, economy, carbon emission reduction, regional policies, environment and other factors to give a comprehensive and comprehensive evaluation of the waste heat utilization effect, better guide the optimal matching of waste heat resources and waste heat utilization technology, and promote the popularization and utilization of waste heat resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate one or more embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 is a flow chart of a comprehensive evaluation method for industrial waste heat utilization effect according to an embodiment of the present invention;

[0018] Figure 2 is a flow chart of a comprehensive evaluation method for industrial waste heat utilization according to an embodiment of the present invention;

[0019] Figure 3 It is a schematic diagram of a comprehensive evaluation system for industrial waste heat utilization effect according to an embodiment of the present invention. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in one or more embodiments of this specification, the following will be combined with the drawings in one or more embodiments of this specification to clearly and completely describe the technical solutions in one or more embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on one or more embodiments of this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this document.

[0021] Method Embodiment

[0022] According to an embodiment of the present invention, a comprehensive evaluation method for the utilization effect of industrial waste heat is provided. Figure 1 is a flow chart of a comprehensive evaluation method for industrial waste heat utilization effect according to an embodiment of the present invention, such as Figure 1 As shown, the comprehensive evaluation method for the industrial waste heat utilization effect according to an embodiment of the present invention specifically includes:

[0023] Step S101, obtaining a waste heat utilization technology to be evaluated, and constructing a corresponding energy conversion model for the waste heat utilization technology to be evaluated;

[0024] Step S102, obtaining the energy output corresponding to the waste heat utilization technology to be evaluated through the energy conversion model, and obtaining corresponding evaluation parameters;

[0025] The energy output is one or more forms of energy output;

[0026] The evaluation parameters include regional industrial electricity prices, cooling and heating prices, cooling and heating operation time limits, emission factors, carbon trading prices and carbon taxes;

[0027] Step S103, obtaining the evaluation index of the waste heat utilization technology to be evaluated based on the energy output and the evaluation parameter, and performing a comprehensive evaluation on the industrial waste heat utilization effect according to the evaluation index, specifically including:

[0028] Based on the energy output and the evaluation parameter, formula 1 is used to obtain the evaluation index of the waste heat utilization technology to be evaluated;

[0029]

[0030] Among them, X waste is the comprehensive evaluation factor for waste heat utilization, Q waste is the residual heat, Q output,i is the energy output corresponding to the waste heat utilization form, η damp,i represents the loss coefficient during the energy output transmission process, k output,iIndicates the annual operation coefficient of this energy output form, x output,i Indicates the unit energy price corresponding to the energy output and the industrial electricity price (Cost elec ), x CO2,i In order to consider the conversion coefficient of carbon emission reduction factors of energy output, N represents the total number of types of energy output corresponding to the utilization form. In the case of multiple energy outputs, the subscript number i is used to distinguish them respectively. represents the carbon trading price, r IPCC,i Indicates the emission factor corresponding to this energy output.

[0031] The following is a specific situation of a comprehensive evaluation method for industrial waste heat utilization effect in combination with an embodiment of the present invention, such as Figure 2 As shown, the above technical solution of the embodiment of the present invention is described in detail.

[0032] The embodiment of the present invention provides a comprehensive evaluation method for industrial waste heat utilization, and the specific process is as follows:

[0033] S1. Select the waste heat utilization technology to be compared;

[0034] S2. Construct an energy conversion model for the waste heat utilization technology to be compared, and collect parameters such as regional industrial electricity prices, cooling and heating price operating time limits, emission factors, and carbon trading prices;

[0035] S3. Based on the proposed comprehensive evaluation indicators, evaluate the utilization effect of each waste heat utilization technology;

[0036] S4. Horizontal comparison is carried out to obtain the screening and comparison results between different waste heat technologies.

[0037] Among them, the calculation formula of the evaluation index of the comprehensive evaluation method is:

[0038]

[0039] Where, X waste is the comprehensive evaluation factor for waste heat utilization, Q waste is the residual heat, Q output,i is the energy output corresponding to the waste heat utilization form, η damp,i represents the loss coefficient during the energy output transmission process, k output,i Indicates the annual operation coefficient of this energy output form, x output,i Indicates the unit energy price corresponding to the energy output and the industrial electricity price (Cost elec ), x CO2,i To take into account the conversion coefficient of carbon emission reduction factors in energy output, N represents the total number of types of energy output corresponding to this utilization form.

[0040] The energy output mentioned in the indicator can be one or multiple energy forms such as electrical energy, cold energy or heat energy. In the case of multiple energy outputs, the subscript i is used to distinguish them.

[0041] The loss reduction coefficient η in the energy output transmission process in the indicator damp,i It is used to evaluate the energy loss corresponding to transmitting energy output to the user end. Generally, the loss coefficient corresponding to electric energy output is 1, that is, the transmission energy loss is ignored; while the transmission of heat energy and cold energy needs to consider the energy loss caused by heat loss for conversion.

[0042] The annual operation coefficient k of energy output in the indicator output,i , which is used to characterize the relative proportion of actual operation in the whole year of energy output. Electric energy output can be regarded as 1, and residential cooling and heating need to consider the ratio of the local cooling and heating season duration to the whole year.

[0043] The energy price per unit of energy output in the indicator is related to the industrial electricity price (Cost elec ) output,i , which is used to convert non-electric energy output from an economic perspective and enable comparison between different energies.

[0044] Carbon emission reduction conversion coefficient x in the indicator CO2,i , the calculation formula is

[0045]

[0046] In the formula, represents the carbon trading price, r IPCC,i It represents the emission factor corresponding to the energy output. The function of this coefficient is to comprehensively consider the carbon emission reduction corresponding to the energy output (emission factor) and the economic factors of carbon emission reduction (carbon trading price), and convert the carbon emission reduction benefits into the indicator.

[0047] The embodiment of the present invention takes the waste heat utilization of a typical 300°C flue gas as an example to evaluate the comprehensive effects of driving the two utilization forms of absorption heat pump residential heating and organic Rankine cycle.

[0048] Firstly, energy conversion models of organic Rankine cycle and absorption heat pump were constructed respectively. Based on the organic Rankine cycle energy conversion model, R141b is selected as the organic Rankine working fluid with the highest energy efficiency driven by 300℃ flue gas waste heat. The ratio of its electric energy output to waste heat input is 17.68%. The absorption heat pump selects a double-effect lithium bromide heat pump, and its corresponding COP value (i.e., heat output / waste heat input) is 2.0.

[0049] In addition to the energy conversion model, the specific conditions of the waste heat utilization area should be considered to determine its operating coefficient, heating price, industrial electricity price, carbon trading price and emission factors of different energy forms. Two regions, A in a northern city and B in a southern city, were selected to compare the effects of two waste heat utilization technologies on the waste heat of flue gas. Ignore the loss of energy output transmission, that is, the loss conversion coefficients of organic Rankine power generation and waste heat heating are both 1. The demand for centralized heating of residents in a southern city B is relatively low, and the heating period of a northern city A is from November 15 of the current year to March 15 of the following year. It can be concluded that the operating coefficients corresponding to the heating in cities B and A are 0 and 0.343 respectively, the heating emission factor is 0.5839kgCO2 / kWh, the power supply emission factor of city A is 0.615kgCO2 / kWh, and the power supply carbon emission factor of city B is 0.445kgCO2 / kWh. According to the actual operation of the project case, when using a 1.4m pipe diameter, 2m / s flow rate, 50km transmission distance, and 80K supply and return water temperature difference, the relative heat loss is about 5%. In addition, the industrial electricity price, heating price, and carbon trading price of City A and City B are shown in Table 1.

[0050] Table 1 Industrial electricity prices, heating prices, and carbon trading prices in City A and City B

[0051] area Warm (yuan / m2) Electricity (yuan / kWh) Carbon (yuan / ton) City A 0.211 0.8809 67.46 City B 0 0.8074 24.52

[0052] Based on the above data, substitute them into the evaluation formula:

[0053]

[0054] It can be concluded that in area A of the city, the comprehensive evaluation factor of organic Rankine waste heat power generation is 0.081, and the comprehensive evaluation factor of residential heating is 0.139. In comparison, residential heating is a more suitable form.

[0055] In urban area B, the comprehensive rating factors of organic Rankine waste heat power generation and residential heating are 0.078 and 0.025 respectively, that is, in urban area B, the assessed waste heat resources are more suitable for driving organic Rankine cycle power generation.

[0056] System Example

[0057] According to an embodiment of the present invention, a comprehensive evaluation system for the utilization effect of industrial waste heat is provided. Figure 3 Schematic diagram of a comprehensive evaluation system for industrial waste heat utilization effect according to an embodiment of the present invention. Figure 3 As shown, the comprehensive evaluation system for industrial waste heat utilization effect according to an embodiment of the present invention specifically includes:

[0058] A construction module 30 is used to obtain a waste heat utilization technology to be evaluated, and to construct a corresponding energy conversion model for the waste heat utilization technology to be evaluated;

[0059] A data module 32 is used to obtain the energy output corresponding to the waste heat utilization technology to be evaluated through the energy conversion model, and obtain corresponding evaluation parameters;

[0060] The energy output is one or more forms of energy output;

[0061] The evaluation parameters include regional industrial electricity prices, cooling and heating prices, cooling and heating operation time limits, emission factors, carbon trading prices and carbon taxes;

[0062] The evaluation module 34 is used to obtain the evaluation index of the waste heat utilization technology to be evaluated based on the energy output and the evaluation parameters, and to conduct a comprehensive evaluation of the industrial waste heat utilization effect according to the evaluation index, specifically for:

[0063] Based on the energy output and the evaluation parameter, formula 1 is used to obtain the evaluation index of the waste heat utilization technology to be evaluated;

[0064]

[0065] Among them, X waste is the comprehensive evaluation factor for waste heat utilization, Q waste is the residual heat, Q output,i is the energy output corresponding to the waste heat utilization form, η damp,i represents the loss coefficient during the energy output transmission process, k output,i Indicates the annual operation coefficient of this energy output form, x output,i Indicates the unit energy price corresponding to the energy output and the industrial electricity price (Cost elec ), x CO2,i To consider the conversion coefficient of carbon emission reduction factors of energy output, N represents the total number of types of energy output corresponding to the utilization form. In the case of multiple energy outputs, the subscript number i is used to distinguish them respectively. Cost CO2 represents the carbon trading price, r IPCC,i Indicates the emission factor corresponding to this energy output.

[0066] The embodiment of the present invention is a system embodiment corresponding to the above-mentioned method embodiment. The specific operations of each module can be understood by referring to the description of the method embodiment, which will not be repeated here.

[0067] In summary, the embodiment of the present invention provides a comprehensive evaluation method for industrial waste heat utilization, which aims to comprehensively evaluate the waste heat utilization effect by integrating energy efficiency, economy, carbon emission reduction, regional policies, environment and other factors. This method is aimed at the selected industrial waste heat utilization technology, by constructing an energy conversion model and collecting relevant parameters, and adopts an original comprehensive evaluation index calculation formula to evaluate the utilization effect of different waste heat utilization technologies. The evaluation index formula uses different coefficients such as transmission loss, annual operation, unit energy price and carbon emission reduction conversion to achieve a comprehensive evaluation of multiple factors, which provides a solution to the current problem of lack of waste heat utilization evaluation indicators, and can contribute to promoting the optimal matching of waste heat resources and technologies and promoting the promotion and utilization of waste heat resources.

[0068] Device Example 1

[0069] An embodiment of the present invention provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the steps described in the method embodiment when executed by the processor.

[0070] Device Example 2

[0071] An embodiment of the present invention provides a computer-readable storage medium, on which a program for implementing information transmission is stored. When the program is executed by a processor, the steps described in the method embodiment are implemented.

[0072] The computer-readable storage medium in this embodiment includes, but is not limited to, ROM, RAM, magnetic disk or optical disk, etc.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A comprehensive evaluation method for the utilization effect of industrial waste heat, characterized in that include: Acquire a waste heat utilization technology to be evaluated, and construct a corresponding energy conversion model for the waste heat utilization technology to be evaluated; Obtaining the energy output corresponding to the waste heat utilization technology to be evaluated through the energy conversion model, and obtaining corresponding evaluation parameters; as well as An evaluation index of the waste heat utilization technology to be evaluated is obtained based on the energy output and the evaluation parameters, and a comprehensive evaluation of the industrial waste heat utilization effect is performed according to the evaluation index.

2. The method according to claim 1, characterized in that The energy output is energy output in one or more forms.

3. The method according to claim 1, characterized in that The evaluation parameters include regional industrial electricity prices, cooling and heating prices, cooling and heating operation time limits, emission factors, carbon trading prices and carbon taxes.

4. The method according to claim 1, characterized in that The evaluation index of the waste heat utilization technology to be evaluated obtained based on the energy output and the evaluation parameters specifically includes: Based on the energy output and the evaluation parameter, formula 1 is used to obtain the evaluation index of the waste heat utilization technology to be evaluated; Among them, X waste is the comprehensive evaluation factor for waste heat utilization, Q waste is the residual heat, Q output,i is the energy output corresponding to the waste heat utilization form, η damp,i represents the loss coefficient during the energy output transmission process, k output,i Indicates the annual operation coefficient of this energy output form, x output,i Indicates the unit energy price corresponding to the energy output and the industrial electricity price (Cost elec ), x CO2,i In order to consider the conversion coefficient of carbon emission reduction factors of energy output, N represents the total number of types of energy output corresponding to the utilization form. In the case of multiple energy outputs, the subscript number i is used to distinguish them respectively. represents the carbon trading price, r IPCC,i Represents the emission factor corresponding to this energy output.

5. A comprehensive evaluation system for the utilization effect of industrial waste heat, characterized by include: A construction module, used to obtain the waste heat utilization technology to be evaluated, and to construct a corresponding energy conversion model for the waste heat utilization technology to be evaluated; A data module, used to obtain the energy output corresponding to the waste heat utilization technology to be evaluated through the energy conversion model, and obtain corresponding evaluation parameters; as well as An evaluation module is used to obtain an evaluation index of the waste heat utilization technology to be evaluated based on the energy output and the evaluation parameters, and to conduct a comprehensive evaluation of the industrial waste heat utilization effect according to the evaluation index.

6. The system according to claim 5, characterized in that The energy output is energy output in one or more forms.

7. The system according to claim 5, characterized in that The evaluation parameters include regional industrial electricity prices, cooling and heating prices, cooling and heating operating time limits, emission factors, carbon trading prices and carbon taxes.

8. The system according to claim 5, characterized in that The evaluation module is specifically used for: Based on the energy output and the evaluation parameter, formula 1 is used to obtain the evaluation index of the waste heat utilization technology to be evaluated; Among them, X waste is the comprehensive evaluation factor for waste heat utilization, Q waste is the residual heat, Q output,i is the energy output corresponding to the waste heat utilization form, η damp,i represents the loss coefficient during the energy output transmission process, k output,i Indicates the annual operation coefficient of this energy output form, x output,i Indicates the unit energy price corresponding to the energy output and the industrial electricity price (Cost elec ), x CO2,i In order to consider the conversion coefficient of carbon emission reduction factors of energy output, N represents the total number of types of energy output corresponding to the utilization form. In the case of multiple energy outputs, the subscript number i is used to distinguish them respectively. represents the carbon trading price, r IPCC,i Represents the emission factor corresponding to this energy output.

9. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the computer program is executed by the processor, the steps of the comprehensive evaluation method for the utilization effect of industrial waste heat as described in any one of claims 1 to 4 are implemented.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores an implementation program for information transmission, and when the program is executed by a processor, the steps of the comprehensive evaluation method for industrial waste heat utilization effect as described in any one of claims 1 to 4 are implemented.

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