Method for calculating carbon efficiency grade index value of refrigerator and method for evaluating low-carbon performance of refrigerator

Abstract

The application discloses a kind of refrigerator carbon efficiency grade index value calculation method and refrigerator low-carbon performance evaluation method, the calculation method uses refrigerator carbon efficiency ratio as the technical parameter of carbon efficiency classification, first calculate refrigerator carbon efficiency ratio, then statistics multiple different design temperature single refrigerator carbon emission, service life and the carbon efficiency ratio data of effective volume, and according to the type grouping of refrigerator design temperature, the carbon efficiency grade of each type of refrigerator is divided into 5 levels, and the carbon efficiency grade 1 is optimal. For single design temperature refrigerator, the index value is determined by sorting method. For multi-chamber multi-design temperature refrigerator, the index value is determined by volume weighting coefficient method. The method can be applied to carbon footprint classification of refrigerators with different service life, different effective volume and various design temperature. The application also discloses a method for evaluating the low-carbon performance of refrigerators using the carbon efficiency grade index value.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of refrigerator carbon footprint grading, in particular to a refrigerator carbon efficiency grade index value calculation method and a refrigerator low-carbon performance evaluation method. BACKGROUND

[0002] At present, there is no refrigerator carbon efficiency grade standard or refrigerator carbon efficiency grade index value calculation method. Similar methods mainly include the following two methods:

[0003] (1) Ranking method

[0004] The ranking method sorts the index values from high to low by statistical analysis of a large number of cases, and takes the data at a specific position in the ranking as the index value of each grade. For example, the standard GB 21455-2019 "Energy Efficiency Limiting Values and Energy Efficiency Grades for Room Air Conditioners" stipulates that the annual energy consumption efficiency (APF) index value of a heat pump type room air conditioner with a rated cooling capacity of 4500W or less and a 2-grade energy efficiency is 4.50. When the standard is developed, the index value is designed according to about 20% of air conditioner products that can meet the requirements. The ranking method is widely used in product performance grading. Through analysis of a large number of case data, the values of the top 20%, 40%, and 60% can be obtained to meet different grading requirements.

[0005] (2) Coefficient method

[0006] The coefficient method obtains the industry representative value of the index by statistical analysis of a large number of data, and takes the ratio of the measured value to the industry representative value as the coefficient to adjust the size of the coefficient for grading. For example, the standard GB 12021.2-2015 "Energy Consumption Limiting Values and Energy Efficiency Grades for Household Refrigerators" stipulates that the standard energy efficiency index η s of a 1-grade energy efficiency horizontal refrigeration-freezing cabinet is less than or equal to 35%. The standard energy efficiency index η s of the refrigerator is calculated according to the following formula:

[0007] η s =E s / E base- ×100%

[0008] In the formula:

[0009] η s - standard energy efficiency index

[0010] E s - standard energy consumption (measured value), unit: kilowatt-hour per 24 hours (kw·h / 24h)

[0011] E base- - baseline energy consumption (industry representative value), unit: kilowatt-hour per 24 hours (kW·h / 24h)

[0012] Coefficient method is also a common method for product performance grading, and the industry representative value is obtained through a large number of case data, and the ratio of the measured value to the industry representative value is taken as the coefficient as the index value, so that different intervals such as ≤50%, 50%-60%, 60%-70% can be obtained for product grading.

[0013] The household refrigerator product structure has the following characteristics: 1. The effective volume of different types of refrigerators is inconsistent; 2. The refrigerator can have a multi-chamber structure, and the design temperature of each chamber is different.

[0014] The carbon emissions of the refrigerator have the following characteristics: 1. The carbon emissions of the refrigerator are mainly concentrated in the use stage; 2. Under the condition that other parameters are unchanged, the larger the effective volume of the refrigerator, the larger the power consumption, and the larger the carbon emissions; 3. Under the condition that other parameters are unchanged, the lower the design temperature of the refrigerator, the larger the power consumption, and the larger the carbon emissions;

[0015] Therefore, using the above method to determine the carbon efficiency grade index of the refrigerator has the following disadvantages:

[0016] I. Ordering method

[0017] By statistically analyzing a large number of carbon emissions of refrigerators, the size of the product carbon emissions is taken as the index value for grading, which cannot comprehensively evaluate the low-carbon level of the refrigerator. The ordering method only considers the total carbon emissions of the refrigerator, and does not consider the function unit of the refrigerator. The larger the size (capacity), the larger the product carbon emissions, the longer the service life, the larger the product carbon emissions, and the lower the design temperature of the chamber, the larger the product carbon emissions.

[0018] II. Coefficient method

[0019] The coefficient method needs to obtain the industry representative value of the carbon emissions of the refrigerator through statistical analysis of a large amount of data, and there is no public calculation method at present. SUMMARY

[0020] One of the purposes of the present application is to provide a calculation method for the carbon efficiency grade index of a refrigerator, which adopts the carbon efficiency ratio of the refrigerator as the technical parameter for carbon efficiency grading, and adopts the ordering method to determine the index value for a single design temperature refrigerator, and adopts the volume weighted coefficient method to determine the index value for a multi-chamber and multi-design temperature refrigerator. The method can be applied to the carbon footprint grading of refrigerators with different service lives, different effective volumes, and different design temperatures.

[0021] The above purpose of the present application is achieved by the following technical scheme: a calculation method for the carbon efficiency grade index of a refrigerator, characterized in that the calculation method comprises the following steps:

[0022] Step (1), define the carbon efficiency ratio of refrigerator CER as the carbon dioxide equivalent of the refrigerator discharged per unit time per unit volume of storage space,

[0023] The calculation formula of the carbon efficiency ratio of refrigerator CER is as follows:

[0024]

[0025] In the formula:

[0026] CER-carbon efficiency ratio of refrigerator, unit: kilogram of carbon dioxide equivalent per liter per year:

kgCO2e / (L·a)

[0027] PCE-carbon emissions of refrigerator product life cycle, unit: kilogram of carbon dioxide equivalent: (kgCO2e);

[0028] V-effective volume of refrigerator, unit: liter: (L);

[0029] L-service life of refrigerator, unit: year: (a);

[0030] Step (2), statistics of carbon emissions, service life and effective volume of carbon efficiency ratio data of a plurality of different design temperature single refrigerator, and according to the type of refrigerator design temperature grouping, the carbon efficiency grade j of each type of refrigerator is divided into 5 levels, and the value of j is 1, 2, 3, 4, 5, wherein the carbon efficiency grade 1 is optimal;

[0031] Step (3), for the carbon efficiency grade index value CER of the refrigerator with single design temperature i,j , wherein subscript i represents the i-th type of refrigerator with single design temperature, and subscript j represents the carbon efficiency grade. The carbon efficiency grade index value is determined by using sorting method. The maximum value in the data set of the smallest 5% of carbon efficiency ratio is selected as the index value of 1 carbon efficiency, that is, 5% of the products meet the 1 carbon efficiency requirement. Similarly, the maximum values in the data sets of the smallest 20%, 40%, 60%, and 80% of carbon efficiency ratio are selected as the index values of 2, 3, 4, and 5 carbon efficiency grades, respectively;

[0032] Step (4), for the carbon efficiency grade index value CER of the refrigerator with multiple design temperature compartments d,j , wherein subscript d represents the d-th type of refrigerator with multiple design temperature compartments, and subscript j represents the carbon efficiency grade. On the basis of the carbon efficiency grade index value of the refrigerator with single design temperature obtained in step (3), the carbon efficiency ratio of the m-th type of refrigerator with single design temperature corresponding to the design temperature of the compartment in the multiple design temperature compartment is selected, wherein m is a subset of i, and m type is two or more multiple types in i type. The effective volume weighting coefficient method is used to calculate the carbon efficiency grade index value of the refrigerator with multiple design temperature compartments, and the specific calculation formula is as follows:

[0033]

[0034] In the formula:

[0035] CER d,j --Carbon efficiency grade index value of multi-design temperature compartment refrigerator, namely, index value of j-grade carbon efficiency of multi-design temperature compartment refrigerator of the i-th design temperature type, unit: kgCO2e / (L·a);

[0036] V i --Effective volume of the i-th design temperature type of multi-design temperature compartment refrigerator, unit: (L);

[0037] V--Sum of effective volumes of multi-design temperature compartment refrigerators, unit: (L);

[0038] CER i,j --Carbon efficiency grade index value of single-design temperature refrigerator, namely, index value of j-grade carbon efficiency of single-design temperature refrigerator of the i-th design temperature type, unit: kgCO2e / (L·a).

[0039] In the present application, various refrigerators of different design temperature types are shown in the following table:

[0040] Design temperature type i Type Design temperature Tc / °C 1 Freezing compartment 4 2 Cooling compartment 12 3 Ice compartment 2 4 Ice making compartment 0 5 0 star compartment 0 6 1 star compartment -6 7 2 star compartment -12 8 3, 4 star compartment -18 9 Wine storage compartment 12 10 Multi design temperature compartment Unclassified

[0041] In the present application, the single-design temperature refrigerator includes 9 types of refrigerators of refrigeration compartment, cooling compartment, ice temperature compartment, ice making compartment, wine storage compartment, 0-star compartment, 1-star compartment, 2-star compartment and 3-star and 4-star compartments, i=1~9.

[0042] The second object of the present application is to provide a method for evaluating the low-carbon performance of a refrigerator.

[0043] The above object of the present application is achieved by the following technical solution: a method for evaluating the low-carbon performance of a refrigerator by using the carbon efficiency grade index value obtained by the above calculation method, characterized in that: the method selects the j-grade carbon efficiency grade index value as the basis for evaluating the low-carbon performance of the refrigerator, compares the carbon efficiency ratio of the refrigerator to be evaluated obtained by step (1) with the j-grade carbon efficiency grade index value, if the carbon efficiency ratio CER of the refrigerator is less than the j-grade carbon efficiency grade index value, it is considered that the refrigerator meets the j-grade carbon efficiency requirement and belongs to a low-carbon performance product; if the carbon efficiency ratio CER of the refrigerator is greater than the j-grade carbon efficiency grade index value, it is considered that the refrigerator does not meet the j-grade carbon efficiency requirement and does not belong to a low-carbon performance product.

[0044] Referring to the energy efficiency identification system and energy saving certification implementation rules, taking the 2nd level as the 2nd level, and taking the carbon efficiency level 2 index value as the low carbon product evaluation value.

[0045] Compared with the prior art, the present application has the following remarkable effects:

[0046] 1. Simple and direct: the low carbon performance of products is measured by the carbon efficiency ratio CER of the refrigerator, and the carbon efficiency is graded, and the complex scoring and grading method of low carbon / zero carbon enterprise evaluation is more simple and direct, and easy to understand.

[0047] 2. Scientific and reasonable: the carbon efficiency ratio of the refrigerator is defined as the carbon dioxide equivalent discharged by the refrigerator in unit time to provide unit volume of storage space, with the unit of kilogram of carbon dioxide equivalent per liter per year:

kgCO2e / (L·a)

[0048] 3. Strong universality: the carbon efficiency level index value is determined using the carbon efficiency ratio of the refrigerator, the refrigerator is divided into 10 categories according to the design temperature of the refrigerator compartment, the carbon efficiency level index value can be determined using the sorting method for the refrigerator with a single design temperature in categories 1-9, and the carbon efficiency level index value can be calculated using the effective volume weighting coefficient method for the refrigerator with multiple design temperature compartments in category 10. The carbon efficiency level index value of the refrigerator with any limited volume and any design temperature compartment combination can be calculated. Category 10 can include multiple refrigerators with multiple design temperature compartments, and the serial number can be 10, 11, 12, etc.

[0049] The present application has the characteristics of simple and direct, scientific and reasonable, and strong universality, and has significant application value in refrigerator carbon footprint grading and low carbon product evaluation and certification. DETAILED DESCRIPTION

[0050] The calculation method of the refrigerator carbon efficiency level index value of the present application is as follows:

[0051] (1) The carbon emission, service life, effective volume of compartment, and design temperature of the compartments of the electric refrigerator are shown in the following table. Here, five kinds of electric refrigerator with single design temperature are selected, and the serial numbers are not consecutive in order to correspond to the table in the summary. Two kinds of electric refrigerator with multiple design temperatures are selected, and the serial numbers are 10 and 11, respectively.

[0052]

[0053]

[0054] (2) The carbon efficiency ratio of the electric refrigerator is calculated according to the formula:

[0055]

[0056] CER - Carbon efficiency ratio of electric refrigerator, unit: kgCO2e / (L·a). PCE - Product life cycle carbon emission of electric refrigerator, unit: kgCO2e. V - Effective volume of electric refrigerator, unit: L

[0057] L - Service life of electric refrigerator, unit: a

[0058] The carbon efficiency ratio CER1 of the electric refrigerator of serial number 1 is

[0059] CER1 = 824 ÷ 378 ÷ 8 = 0.2725 kgCO2e / (L·a)

[0060] The carbon efficiency ratio CER5 of the electric refrigerator of serial number 5 is

[0061] CER5 = 1741 ÷ 405 ÷ 10 = 0.4299 kgCO2e / (L·a)

[0062] The carbon efficiency ratio CER of the electric refrigerator of serial number 10 is 10

[0063] CER 10 = 1596 ÷ (252 + 265) ÷ 8 = 0.4263 kgCO2e / (L·a)

[0064] The carbon efficiency ratio CER of the electric refrigerator of serial number 11 is 11

[0065] CER 11 = 1086 ÷ (181 + 33 + 98) ÷ 8 = 0.4351 kgCO2e / (L·a)

[0066] The carbon efficiency ratios of the remaining electric refrigerators are calculated in the same way, and the results after sorting are shown in the following table.

[0067] ​​

[0068]

[0069] (3) Statistics of carbon emission, service life and carbon efficiency ratio data of multiple different design temperature single refrigerators, and grouping according to the type of refrigerator design temperature, and the carbon efficiency grade j of each type of refrigerator is divided into 5 levels, j is 1, 2, 3, 4, 5, and the carbon efficiency grade 1 is the best. The carbon efficiency ratio data statistics calculation table of multiple different design temperature single refrigerators is as follows:

[0070]

[0071]

[0072] (4) For the carbon efficiency grade index value CER of the design temperature single refrigerator i,j , wherein subscript i represents the i-th type of design temperature single refrigerator, i takes the value range i = 1 ~ 9, and subscript j represents the carbon efficiency grade, j = 1, 2, 3, 4, 5.

[0073] In this embodiment, 5 of the 9 types of design temperature single refrigerators are selected, i = 1, 5, 6, 8, 9, and the carbon efficiency grade index value is determined using the ranking method. The maximum value in the data set of the smallest 5% of the carbon efficiency ratio is selected as the index value of the 1st carbon efficiency, that is, 5% of the products meet the 1st carbon efficiency requirement; similarly, the maximum values in the data sets of the smallest 20%, 40%, 60%, and 80% of the carbon efficiency ratio are selected as the index values of the 2nd, 3rd, 4th, and 5th carbon efficiency grades, respectively.

[0074] From the table data in step (3), the carbon efficiency grade index values CER of the 5 types of design temperature single refrigerators i,j (i = 1, 5, 6, 8, 9; j = 1, 2, 3, 4, 5) are as shown in the following table.

[0075]

[0076] (5) For the carbon efficiency grade index value CER of the refrigerator with multiple design temperature compartments d,j , wherein subscript d represents the d-th type of multiple design temperature compartment refrigerator, and subscript j represents the carbon efficiency grade.

[0077] In this embodiment, d takes the values of 10 and 11, which are the 10th and 11th types. Here, only the refrigerator with serial number 11 is taken as an example for calculation, so in this embodiment, CER d,j , that is, CER 11,jThat is, refrigerator number 11 is a refrigerator with three temperature compartments.

[0078] The carbon efficiency rating (CER) of the refrigerator with a single design temperature obtained in step (4) i,j Based on this, the carbon efficiency ratios of three types of refrigerators with the same design temperature as the corresponding compartments in the three design temperature compartments are selected. That is, the carbon efficiency ratios of the three types of refrigerators with single design temperature, numbered 1, 6, and 8, are selected, i.e., i = 1, 6, 8. The effective volume weighted coefficient method is used to calculate the carbon efficiency rating index value of the refrigerator with multiple design temperature compartments. The specific calculation formula is as follows:

[0079]

[0080] In the formula:

[0081] CER 11,j --The carbon efficiency rating index value for refrigerators with multiple design temperature compartments, that is, the carbon efficiency rating index value of Class 11 refrigerators with multiple design temperature compartments, j level, in kilograms of carbon dioxide equivalent per liter per year: [kgCO2e / (L·a)].

[0082] V i --A refrigerator with multiple temperature compartments, where the effective volume of the i-th type of temperature compartment is expressed in liters (L); in this embodiment, i = 1, 6, 8, corresponding to refrigerators with a single temperature compartment in types 1, 6, and 8, respectively.

[0083] V -- The sum of the effective volumes of a multi-temperature-compartment refrigerator, i.e., the total volume, in liters (L);

[0084] CER i,j —The carbon efficiency rating index value for refrigerators with a single design temperature, that is, the carbon efficiency rating index value of refrigerator level j with design temperature i, i = 1, 6, 8, and the unit is kilograms of carbon dioxide equivalent per liter per year: [kgCO2e / (L·a)].

[0085] The relevant information for refrigerator number 11 is as follows:

[0086]

[0087] The carbon efficiency rating (CER) for refrigerators with a single design temperature (i = 1, 5, 6, 8, 9) is as follows. i,j See the table in step (4).

[0088] For refrigerator No. 11, which has three design temperature compartments, the carbon efficiency rating (CER) is... d,j (i.e., CER) 11,j Substituting the data, we can calculate...

[0089] V = 181 + 33 + 98 = 312 L

[0090] V1= 181 L

[0091] The effective volume weighted coefficient of the 4°C design temperature chamber is 181 ÷ 312 = 0.580

[0092] V6= 33 L

[0093] The effective volume weighted coefficient of the -6°C design temperature chamber is 33 ÷ 312 = 0.106

[0094] V8= 98 L

[0095] The effective volume weighted coefficient of the -18°C design temperature chamber is 98 ÷ 312 = 0.314

[0096] Calculate the 1st carbon efficiency index value of the refrigerator of serial number 11

[0097] CER 11,1 = 0.580 × CER 1,1 + 0.106 × CER 6,1 + 0.314 × CER 8,1

[0098] = 0.580 × 0.260 + 0.106 × 0.430 + 0.314 × 0.550

[0099] = 0.1508 + 0.0455 + 0.1728

[0100] = 0.3691 kgCO2e / (L·a)

[0101] Calculate the 2nd, 3rd, 4th, and 5th carbon efficiency index values of the refrigerator of serial number 11 according to this method, and the index values are rounded to three decimal places. The results are shown in the following table:

[0102]

[0103] The carbon efficiency ratio of the refrigerator of serial number 11 is 0.4351 kgCO2e / (L·a) as calculated above. The carbon efficiency ratio value is less than the value of the 3rd carbon efficiency level, and meets the requirements of the 3rd carbon efficiency level. However, it is greater than the value of the 2nd carbon efficiency level, and does not meet the requirements of the 2nd carbon efficiency level.

[0104] (6) Taking the carbon efficiency level 2 level index value as the low carbon product evaluation value, the carbon efficiency ratio CER of the refrigerator calculated in the foregoing step (2) is implemented carbon efficiency classification and low carbon product evaluation. If the carbon efficiency ratio CER of the refrigerator is less than the carbon efficiency level index value of level 2, it is considered that the refrigerator meets the carbon efficiency requirement of level 2 and belongs to the low carbon performance product; if the carbon efficiency ratio CER of the refrigerator is greater than the carbon efficiency level index value of level 2, it is considered that the refrigerator does not meet the carbon efficiency requirement of level 2 and does not belong to the low carbon performance product. The specific evaluation results are as follows:

[0105]

[0106] The above embodiments of the present application are not intended to limit the protection scope of the present application, and the embodiments of the present application are not limited thereto. According to the above content of the present application, according to the ordinary technical knowledge and common practice in the art, other various forms of modifications, replacements or changes to the above structure of the present application, which do not deviate from the above basic technical idea of the present application, should fall within the protection scope of the present application.

Claims

1. A method of calculating a carbon efficiency grade index value of a refrigerator, characterized by, The calculation method comprises the following steps: Step (1), defining the carbon efficiency ratio CER of the refrigerator as the carbon dioxide equivalent discharged by the refrigerator per unit time for providing unit volume of storage space, The calculation formula of the carbon efficiency ratio CER of the refrigerator is as follows: In the formula, CER is the carbon efficiency ratio of the refrigerator, and the unit is kilogram of carbon dioxide equivalent per liter per year; PCE is the product life cycle carbon emission of the refrigerator, and the unit is kilogram of carbon dioxide equivalent; V is the effective volume of the refrigerator, and the unit is liter; L is the service life of the refrigerator, and the unit is year; Step (2), statistics of the carbon emission, service life and effective volume of the carbon efficiency ratio data of a plurality of refrigerators with single design temperature, and grouping according to the type of the design temperature of the refrigerator, the carbon efficiency grade j of each type of the refrigerator is divided into 5 grades, and the value of j is 1, 2, 3, 4 and 5 respectively, wherein the carbon efficiency grade 1 is the best; Step (3), the carbon efficiency grade index value CER of the refrigerator with single design temperature i,j Wherein, the subscript i represents the i-th type of refrigerator with single design temperature, the carbon efficiency grade index value is determined by using the ranking method, and the maximum value in the data set with the smallest 5% of the carbon efficiency ratio is selected as the index value of the first grade carbon efficiency, that is, 5% of the products meet the first grade carbon efficiency requirement; similarly, the maximum values in the data sets with the smallest 20%, 40%, 60%, and 80% of the carbon efficiency ratio are taken as the index values of the second, third, fourth, and fifth carbon efficiency grades, respectively. Step (4), carbon efficiency rating index value CER of refrigerator with multiple design temperature compartments d,j Wherein, subscript d represents the dth type of refrigerator with multiple design temperature compartments, on the basis of the carbon efficiency rating index value of the refrigerator with single design temperature obtained in step (3), the carbon efficiency ratio of the mth type of refrigerator with single design temperature corresponding to the design temperature of the multiple design temperature compartments is selected, wherein m is a subset of i, the mth type is a multiple of two or more types in the ith type, the carbon efficiency rating index value of the refrigerator with multiple design temperature compartments is calculated by using the effective volume weighting coefficient method, and the specific calculation formula is as follows: In the formula, CER d,j Carbon equivalent rating value of the refrigerator with multi-temperature compartments, in kilogram of carbon dioxide equivalent per liter per year; V i -- refrigerator with multiple design temperature compartments, effective volume of the i-th design temperature compartment, in liters: V is the sum of the effective volumes of the multi-temperature chamber refrigerators, and the unit is liter; CER i,j Carbon equivalent grade index value of a single temperature designed refrigerator, unit: kilogram of carbon dioxide equivalent per liter per year.

2. A method for evaluating the low-carbon performance of a refrigerator using the carbon efficiency grade index value obtained by the calculation method of claim 1, characterized in that: The method for evaluation selects the carbon efficiency grade index value of j grade as the basis of the low-carbon performance evaluation of the refrigerator, compares the carbon efficiency ratio of the refrigerator to be evaluated calculated through step (1) with the carbon efficiency grade index value of j grade, if the carbon efficiency ratio CER of the refrigerator is less than the carbon efficiency grade index value of j grade, it is considered that the refrigerator meets the carbon efficiency requirement of j grade and belongs to the low-carbon performance product; if the carbon efficiency ratio CER of the refrigerator is greater than the carbon efficiency grade index value of j grade, it is considered that the refrigerator does not meet the carbon efficiency requirement of j grade and does not belong to the low-carbon performance product.

3. The method of evaluation of claim 2, wherein: Taking j grade as 2 grade, the carbon efficiency grade 2 index value is taken as the low-carbon product evaluation value.

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