Method for calculating carbon footprint of electricity used in twisting and weaving silk fabrics

Abstract

The present invention discloses a method for calculating the carbon footprint of electricity used in the twisting and weaving stages of silk textiles. This method establishes an algorithm for allocating a factory's total annual electricity consumption among each type of textile and each process of each type of textile, thereby establishing a system and method for allocating electricity and calculating the carbon footprint of electricity used in the twisting and weaving stages of silk textiles. First, the actual processing time for each process of each type of textile is calculated, and combined with the rated power of the equipment for each process, a total annual electricity consumption equation is enumerated, including a single variable, "operating efficiency," to calculate the operating efficiency of the industrial equipment. The operating efficiency of the industrial equipment is then substituted into the calculation formula for the time for each process of each type of textile to complete the allocation of the shared electricity data among each process of each type of textile, and finally, the carbon footprint distribution of electricity used in each production process of any type of textile can be calculated. The high accuracy of the calculation method of the present invention is advantageous for clarifying the carbon footprint situation for each process of each type of textile.

Description

[Technical Field]

[0001] The present invention relates to the technical field of carbon footprint calculation, and in particular to a method for calculating the carbon footprint of electricity in the twisting and weaving stages of silk fabrics. [Background technology]

[0002] At the 75th United Nations General Assembly, Chinese General Secretary Xi proposed China's double carbon goal: peaking carbon emissions by 2030 and achieving carbon neutrality by 2060. The textile industry has always been one of the most energy-intensive and carbon-intensive industries, with greenhouse gas emissions during its production and use stages accounting for 3% of global greenhouse gas emissions. The silk industry also requires large amounts of water resources during the reeling and printing processes. The reeling, weaving, and wastewater treatment processes consume large amounts of electricity, resulting in significant greenhouse gas emissions. However, there are currently very few studies evaluating the carbon footprint of silk textiles. A scientific, objective, and fair assessment of the entire life cycle of silk textiles remains largely unresolved in many areas, including methodology, data collection, life cycle inventory (LCI), and the construction of a database of GHG emission factors for supply chain materials. However, given this context of sustainable development, it is essential for the silk industry to conduct accurate carbon footprint calculation research. Summary of the Invention [Problem to be solved by the invention]

[0003] The weaving process of silk weaving involves unit processes such as raw silk inspection, soaking (coloring), dehydration, drying, doubling, twisting, shaping, rewinding, warping, warp threading and knotting, loom preparation, weaving, and raw silk inspection. The inputs for these processes are primarily electricity, with only the soaking process requiring water and small amounts of coloring and soaking aids. However, silk weaving companies currently lack three-stage measurement, making it impossible to directly obtain the electricity consumption for each step of the product being studied. Furthermore, the total electricity consumption for a given silk fabric cannot be directly obtained. Because the processing times for each step of the same silk fabric do not match, it is not possible to produce only the same variety of raw silk in the same plant in a given period of time. Therefore, there is currently no effective way to calculate the carbon footprint of electricity used in the silk weaving process. [Means for solving the problem]

[0004] The technical problem to be solved by the present invention is to provide a highly feasible and accurate method for calculating the carbon footprint of electricity in the twisting and weaving stages of silk fabrics.

[0005] In order to solve the above problem, the present invention provides a method for accounting for the carbon footprint of electricity in the twisting and weaving stages of silk fabric, the method comprising the following steps: In S1, the total weight of warp threads, the total weight of weft threads, the total length of raw silk for warp threads, the total length of raw silk for weft threads, the total length of warp threads, and the total length of weft threads for each type of silk fabric produced in the factory throughout the year are calculated, In S2, the working time for each production process of each type of silk fabric is calculated based on the calculated total weight of warp threads, total weight of weft threads, total length of raw silk for warp threads, total length of raw silk for weft threads, total length of warp threads, and total length of weft threads; In step S3, based on the working time of each production process calculated in step S2, a calculation formula for the electricity consumption of each process is established according to the parameters of the equipment's rated power and operating efficiency, and an equation for the annual electricity consumption including the single variable operating efficiency is constructed, and the operating efficiency of the industrial equipment is calculated; In S4, the operating efficiency of the industrial equipment is substituted into the equation for the electricity consumption of each process to calculate the electricity consumption in each production process of each type of silk fabric and the corresponding carbon footprint distribution of electricity.

[0006] As a further improvement of the present invention, in step S3, the electricity consumption of each process of silk weaving is calculated based on the electricity consumption of four categories of lighting, fans, air conditioners and main equipment during production, and the corresponding annual electricity consumption equation including the single variable operating efficiency is as follows: TIFF0007775497000001.tif69170However, TIFF0007775497000002.tif6170 is the total electricity consumption of lighting, fans, air conditioners, and industrial equipment for all silk fabrics produced in the factory throughout the year, TIFF0007775497000003.tif8170 is the total electricity consumption of the factory's annual production, TIFF0007775497000004.tif5170 is the operating efficiency of the equipment, TIFF0007775497000005.tif8170 is the production time of the jth production process of the i-th variety of silk fabric, TIFF0007775497000006.tif6170 is the total power consumption of the lighting for the jth production process, TIFF0007775497000007.tif6170 is the total power consumption of the fan in the jth production process, TIFF0007775497000008.tif6170 is the number of days the fan was used throughout the year, TIFF0007775497000009.tif6170 is the total working days for the year, TIFF0007775497000010.tif6170 is the total power consumption of the air conditioner for the jth production process, TIFF0007775497000011.tif6170 is the number of days that the air conditioner was used throughout the year, TIFF0007775497000012.tif6170 is the total power consumption of the industrial equipment in the jth production process, TIFF0007775497000013.tif7170 is the amount of electricity required to heat the water in the soaking process of the i-th variety of silk fabric, and this equation can be used to calculate the operating efficiency of the industrial equipment in the base year.

[0007] As a further improvement of the present invention, in step S4, calculating the carbon footprint of each type of electricity in each production process of each variety of silk fabric is as follows: TIFF0007775497000014.tif8170However, TIFF0007775497000015.tif8170 is the kth power consumption category in the jth production process of the ith variety of silk fabric, and the power consumption category refers to four types of power consumption: lighting, fans, air conditioners, and industrial equipment. TIFF0007775497000016.tif8170 is the carbon footprint of the kth electricity used in the jth production process of the ith variety of silk fabric, TIFF0007775497000017.tif6170 is the power discharge factor, TIFF0007775497000018.tif6170 is the total length of raw silk of the i-th variety of silk fabric.

[0008] In a further improvement of the present invention, the amount of power required to heat the water in the soaking step is calculated as follows: TIFF0007775497000019.tif8170However, TIFF0007775497000020.tif5170 is the specific heat capacity of water, TIFF0007775497000021.tif5170 is the bath ratio for thread immersion, TIFF0007775497000022.tif6170 is the total weight of the warp yarn, TIFF0007775497000023.tif6170 is the total weight of the weft yarn, TIFF0007775497000024.tif6170 is the final heating temperature of the water, TIFF0007775497000025.tif7170 is the average initial temperature of the water.

[0009] In a further improvement of the present invention, step S1 comprises the following steps: In S11, the total weight of the warp threads and the total weight of the weft threads of the silk fabric are calculated using the following formula: TIFF0007775497000026.tif9170However, TIFF0007775497000027.tif6170 is the full length of raw silk from silk fabric, TIFF0007775497000028.tif6170 is the given amount of warp threads per meter of raw silk, TIFF0007775497000029.tif6170 is the given amount of weft thread per meter of raw silk, In S12, the total length of the raw silk material for the warp and the total length of the raw silk material for the weft are calculated using the following formula: TIFF0007775497000030.tif21170However, TIFF0007775497000031.tif6170 is the total length of raw silk used as warp threads, TIFF0007775497000032.tif6170 is the total length of raw silk used as weft thread, TIFF0007775497000033.tif6170 is the fineness of raw silk, In S13, the total length of the warp yarns and the total length of the weft yarns are calculated by the following formula: TIFF0007775497000034.tif24170However, TIFF0007775497000035.tif8170 is the total length of the warp threads, TIFF0007775497000036.tif8170 is the total length of the weft yarn, TIFF0007775497000037.tif8170 is the number of warp threads combined, TIFF0007775497000038.tif8170 is the number of weft yarns combined, TIFF0007775497000039.tif8170 is the twist shrinkage rate of the warp yarn, TIFF0007775497000040.tif8170 is the twist shrinkage rate of the weft yarn.

[0010] In a further improvement of the present invention, the working time of the immersion step is calculated as follows: TIFF0007775497000041.tif17170However, TIFF0007775497000042.tif6170 is the total number of immersion tanks, TIFF0007775497000043.tif6170 is the time of the immersion process, TIFF0007775497000044.tif6170 is the soaking time of raw silk used as warp threads, TIFF0007775497000045.tif6170 is the soaking time of raw silk used as weft thread. TIFF0007775497000046.tif6170 is the weight of raw silk that is immersed in one go.

[0011] As a further improvement of the present invention, the working time of the winding process is calculated as follows: TIFF0007775497000047.tif9170However, TIFF0007775497000048.tif6170 is the time for the thread winding process, TIFF0007775497000049.tif6170 is the production volume per hour of one bobbin winding machine, TIFF0007775497000050.tif6170 is the number of bobbin winding machines, The working time for the doubling process is calculated as follows: TIFF0007775497000051.tif15170However, TIFF0007775497000052.tif6170 is the time for the doubling process, TIFF0007775497000053.tif6170 is the linear speed of the doubling machine, TIFF0007775497000054.tif6170 is the number of doubling machines, TIFF0007775497000055.tif6170 is the number of ingots in the doubling machine, The working time for the twisting process is calculated as follows: TIFF0007775497000056.tif14170However, TIFF0007775497000057.tif6170 is the time for the twisting process, TIFF0007775497000058.tif6170 is the linear velocity of the warp yarn when twisting, TIFF0007775497000059.tif6170 is the linear speed when twisting the weft yarn.

[0012] As a further improvement of the present invention, the working time of the warping step is calculated as follows: In the TIFF0007775497000060.tif13170 formula, TIFF0007775497000061.tif6170 is the operation time of the warping process, and its unit is h. TIFF0007775497000062.tif6170 is the linear speed of the warping machine, and its unit is m / min. TIFF0007775497000063.tif6170 is the number of warping machines, TIFF0007775497000064.tif6170 is the basic tissue coefficient, TIFF0007775497000065.tif6170 is the latitudinal density, and its unit is lines / cm. TIFF0007775497000066.tif6170 is the crepe increase rate, TIFF0007775497000067.tif6170 is an indicator of the degree of difference in thickness between the weft and warp threads.

[0013] As a further improvement of the present invention, the production process includes 15 production processes, namely, raw material inspection process, soaking process, dewatering process, drying process, yarn winding process, doubling process, twisting process, shaping process, rewinding process, warping process, warp threading and warp knotting process, loom preparation process, weaving process, fabric inspection process, and design process. [Effects of the Invention]

[0014] The method for calculating the carbon footprint of electricity used in the twisting and weaving stages of silk fabrics of the present invention first calculates the amount of warp and weft yarn used in the silk fabric, then calculates the operating time of each production process based on the amount of warp and weft yarn used, and then establishes a calculation formula for the electricity consumption of each process based on the operating time of each production process and the rated power and operating efficiency parameters of the equipment for each process, constructs an annual electricity consumption equation including the single variable "operating efficiency", calculates the operating efficiency of the industrial equipment, and then substitutes the operating efficiency of the industrial equipment into the electricity consumption equation for each process, thereby calculating the electricity consumption of each production process sequence of each type of silk fabric and the corresponding electricity carbon footprint distribution, which is highly accurate. The calculation results are useful for clarifying the carbon emission situation of each part and helping to take corresponding measures to reduce carbon emissions in actual production. The present invention establishes an algorithm for allocating the total amount of electricity used throughout the year among each type of fabric and each process of each type of fabric in a factory, thereby establishing a system and method for allocating electricity and calculating the carbon footprint of electricity at the stages of twisting and weaving silk fabrics.

[0015] The above description is only a summary of the technical solution of the present invention, and in order to more clearly understand the technical solution of the present invention, which can be practiced according to the content of the specification, and to more clearly understand the above and other objects, features and advantages of the present invention, preferred embodiments are given below and described in detail with reference to the drawings. [Brief explanation of the drawings]

[0016] [Figure 1]FIG. 1 is a flow chart of a method for accounting for the carbon footprint of electricity in the twisting and weaving stages of silk fabric in a preferred embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] The present invention will be further described below with reference to the drawings and specific examples, which will enable those skilled in the art to better understand and practice the present invention, but the examples given are not intended to limit the present invention.

[0018] Example 1 As shown in FIG. 1, in a preferred embodiment of the present invention, the method for calculating the carbon footprint of electricity in the twisting and weaving stages of silk fabrics includes the following steps: In S1, the total weight of warp threads, the total weight of weft threads, the total length of raw silk for warp threads, the total length of raw silk for weft threads, the total length of warp threads, and the total length of weft threads for each type of silk fabric produced in the factory throughout the year are calculated, To calculate the processing time for each production step, first calculate the amount of warp and weft yarns used, including their total weight and total length, based on the parameters of the weaving process and the production volume of the product being studied. Step S1 specifically includes the following steps: In S11, the total weight of the warp threads and the total weight of the weft threads of the silk fabric are calculated by the following formula: TIFF0007775497000068.tif20170However, TIFF0007775497000069.tif6170 is the total weight of the warp yarn, and its unit is kg. TIFF0007775497000070.tif6170 is the total weight of the weft yarn, and its unit is kg. TIFF0007775497000071.tif6170 is the total length of raw silk in silk fabrics, and its unit is meters. TIFF0007775497000072.tif6170 is the specified weight of warp threads in silk fabric, and its unit is g / m. TIFF0007775497000073.tif6170 is the predetermined amount of weft threads for silk fabrics. The predetermined amounts of warp and weft threads can be obtained by searching the fabric specifications published by the China Silk Industry Headquarters in 1992 based on the fabric number. When using a rapier loom, the weft threads for the edge of the fabric are added to the predetermined amount of weft threads according to the length ratio.

[0019] In the winding and doubling process, it is necessary to estimate the winding time according to the length of the raw silk material, and therefore it is also necessary to calculate the length of the raw silk material used as the warp and weft threads. Based on the predetermined amount of warp threads and the predetermined amount of weft threads and the total length of the unprocessed silk, the total length of the raw silk material used as the warp and weft threads can be calculated and obtained, specifically, as follows: In S12, the total length of the raw silk material for the warp and the total length of the raw silk material for the weft are calculated using the following formula: TIFF0007775497000074.tif23170However, TIFF0007775497000075.tif6170 is the total length of raw silk used as warp threads, and its unit is meters. TIFF0007775497000076.tif6170 is the total length of raw silk used as weft thread, and its unit is meters. TIFF0007775497000077.tif6170 is the fineness of raw silk, and its unit is denier.

[0020] In the weaving of silk fabrics, twisted yarns are generally used as the warp and weft yarns of the fabric, that is, multiple raw silk threads are produced by doubling and twisting them. In the double twisting process, the operating time needs to be calculated based on the length of the twisted yarn, and therefore the length of all warp yarns and the length of all weft yarns needs to be calculated based on the number of filaments in the twisted yarn. Specifically, In S13, the total length of the warp yarns and the total length of the weft yarns are calculated using the following formula: TIFF0007775497000078.tif23170However, TIFF0007775497000079.tif8170 is the total length of the warp threads, and its unit is meters. TIFF0007775497000080.tif8170 is the total length of the weft yarn, and its unit is meters. TIFF0007775497000081.tif8170 is the number of warp threads combined, TIFF0007775497000082.tif8170 is the number of weft yarns combined, TIFF0007775497000083.tif8170 is the twist shrinkage rate of the warp yarn, TIFF0007775497000084.tif8170 is the twist shrinkage rate of the weft yarn.

[0021] In S2, the working time for each production process of each type of silk fabric is calculated based on the calculated total weight of warp threads, total weight of weft threads, total length of raw silk for warp threads, total length of raw silk for weft threads, total length of warp threads, and total length of weft threads; In this embodiment, the production process includes 15 steps: raw material inspection step, soaking step, dewatering step, drying step, yarn winding step, doubling step, twisting step, shaping step, rewinding step, warping step, warp threading and warp knotting step, loom preparation step, weaving step, fabric inspection step, and design step. The details of each production step are calculated as follows:

[0022] (1) Raw material inspection process In the raw material inspection stage, a sampling inspection method is used, and generally, a sampling inspection is carried out for every 60 kg of raw yarn. The total amount of raw material involved in each sampling inspection is TIFF0007775497000085.tif6170kg. The average time for each sampling inspection is TIFF0007775497000086.tif6170h. Then, the time required for the raw material inspection stage is calculated using the following formula: In the TIFF0007775497000087.tif17170 formula, TIFF0007775497000088.tif6170 is the time for the raw material inspection stage, and its unit is h.

[0023] (2) Soaking process The calculation of the soaking time is mainly used to calculate the electricity consumption for lighting and fans. The electricity consumption for the heated water for soaking the yarn is calculated in a different way. The total number of soaking tanks used by the company is calculated in a different way. TIFF0007775497000089.tif6170, all of which should be used when estimating the time. Furthermore, the immersion times for the warp and weft threads are different, so they should be calculated separately. The calculation method is as follows: In the TIFF0007775497000090.tif14170 formula, TIFF0007775497000091.tif6170 is the operation time of the immersion process, and its unit is h. TIFF0007775497000092.tif6170 is the soaking time of raw silk used as warp threads, and its unit is h. TIFF0007775497000093.tif6170 is the soaking time of raw silk used as weft yarn, and its unit is h. TIFF0007775497000094.tif6170 is the weight of raw silk for one immersion, and its unit is kg.

[0024] (3) Dehydration process After the yarn soaking is completed, the fabric needs to be dewatered. The equipment used for dewatering is generally a centrifugal dewatering machine. The operating time is calculated using the following formula: In the TIFF0007775497000095.tif9170 formula, TIFF0007775497000096.tif6170 is the operation time of the dehydration process, and its unit is h. TIFF0007775497000097.tif6170 is the weight of raw silk dehydrated by each dehydrator, expressed in kg. TIFF0007775497000098.tif6170 is the number of dehydrators.

[0025] (4)Drying process Raw silk generally dries naturally after dehydration, and does not require electricity for lighting or fans. However, during the hot and humid season when humidity is highest each year, it is necessary to use air conditioners to lower the temperature and adjust humidity, and during the rainy season in some areas, it is necessary to add a dehumidifier and use it in combination with the air conditioner. In this case, the operating hours must be calculated. Only some varieties require external equipment (air conditioners, dehumidifiers, etc.) in the production process, but the operating hours for this part still need to be allocated to each variety of fabric based on the amount of fabric produced. The number of days per year that the added equipment is used for drying in the factories being studied is TIFF0007775497000099.tif6170, the time required for the drying stage of this type of fabric is as follows: In the TIFF0007775497000100.tif10170 formula, TIFF0007775497000101.tif6170 is the total length of raw silk for all varieties of fabric woven per year at the mill being studied.

[0026] (5) Thread winding process After the soaking process of the thread is completed, the thread needs to be wound, and since the specifications of raw silk in a factory are generally fixed, the winding wheel speed generally does not change. Even if there are raw silks with different specifications, the winding speed is constant for raw silks with the same specifications. Therefore, the production volume per hour per machine is also roughly the same. Therefore, the main equipment is the winding machine, and its power consumption is calculated using the following formula: In the TIFF0007775497000102.tif10170 formula, TIFF0007775497000103.tif6170 is the time for the winding process, and its unit is h. TIFF0007775497000104.tif6170 is the production volume per hour of one yarn winding machine, and its unit is kg / h. TIFF0007775497000105.tif6170 is the number of bobbin winding machines.

[0027] (6) Doubling process The operation time of the doubling process can be calculated based on the doubling speed of the warp and weft yarns, the number of doubling yarns, and the total length of the raw silk, as shown in the following formula: In the TIFF0007775497000106.tif18170 formula, TIFF0007775497000107.tif6170 is the operation time of the doubling process, and its unit is h. TIFF0007775497000108.tif6170 is the linear speed of the doubling machine, and its unit is m / min. TIFF0007775497000109.tif6170 is the number of doubling machines, TIFF0007775497000110.tif6170 is the number of ingots in the yarn doubling machine.

[0028] (7) Twisting process The main equipment in the twisting stage is the twisting machine, and the operating time is calculated using the following formula: In the TIFF0007775497000111.tif14170 formula, TIFF0007775497000112.tif6170 is the operation time of the twisting process, and its unit is h. TIFF0007775497000113.tif6170 is the linear speed of the warp yarn when twisting, and its unit is m / min. TIFF0007775497000114.tif6170 is the linear speed of the weft yarn when twisting, and its unit is m / min. TIFF0007775497000115.tif6170 is the number of twisting machines, TIFF0007775497000116.tif6170 is the number of ingots in the twisting machine.

[0029] (8)Standard process After the twisted yarns are twisted together, they need to be subjected to wet heat shaping to fix the twist. The weft yarns generally have a higher twist than the warp yarns, so the shaping time is longer. The specific shaping time is determined by the twist. Operating time of the wet heat shaping process TIFF0007775497000117.tif6170 can be calculated based on the following formula, In the TIFF0007775497000118.tif9170 formula, TIFF0007775497000119.tif6170 is the thermal shaping time of the warp yarn, and its unit is h. TIFF0007775497000120.tif6170 is the heat-setting time of the weft yarn, and its unit is h. TIFF0007775497000121.tif6170 is the weight of yarn that can be processed in one go using standard equipment, and its unit is kg.

[0030] (9) Rewinding process The main equipment in the rewinding process is the rewinding machine, and the calculation formula for its operating time is as follows: In the TIFF0007775497000122.tif14170 formula, TIFF0007775497000123.tif6170 is the operating time of the rewinding process, its unit is h. TIFF0007775497000124.tif6170 is the linear speed of the rewinding machine, and its unit is m / min. TIFF0007775497000125.tif6170 is the number of rewinding machines, TIFF0007775497000126.tif6170 is the number of ingots in the rewinding machine.

[0031] (10) Warping process The total length of the warping process can be estimated based on the warping speed of the warping process, the number of warping machines, the total length of the fabric passing through, and the shrinkage rate in the warp direction. By comparing this with the warping speed, the operating time of the warping process can be obtained. TIFF0007775497000127.tif14170In the formula, TIFF0007775497000128.tif6170 is the operation time of the warping process, and its unit is h. TIFF0007775497000129.tif6170 is the linear speed of the warping machine, and its unit is m / min. TIFF0007775497000130.tif6170 is the number of warping machines, TIFF0007775497000131.tif6170 is the basic tissue coefficient, TIFF0007775497000132.tif6170 is the latitudinal density, and its unit is lines / cm. TIFF0007775497000133.tif6170 is the crepe increase rate, TIFF0007775497000134.tif6170 is an indicator of the degree of difference in thickness between the weft and warp threads.

[0032] (11) Preparation before weaving The preparation before weaving mainly includes the warp threading and warp knotting process and the loom preparation process. The operating times of these two processes can be obtained through direct research and study, and are respectively TIFF0007775497000135.tif8170 and It can be TIFF0007775497000136.tif8170.

[0033] (12) Weaving process The main equipment in the weaving process can be divided into multi-arm looms and jacquard looms. The types of fabrics that these two types of looms are suitable for are completely different. They can be selected according to the type of fabric. The formula for calculating the operating time of the weaving process is as follows: In the TIFF0007775497000137.tif15170 formula, TIFF0007775497000138.tif6170 is the operating time of the weaving process, and its unit is h. TIFF0007775497000139.tif6170 is the loom speed, its unit is r / min, TIFF0007775497000140.tif6170 is the weaving efficiency, TIFF0007775497000141.tif6170 is the number of looms.

[0034] (13) Fabric inspection process The main equipment in the fabric inspection process is the inspection machine, but the fabric inspection machine does not operate at a constant speed. When workers inspect the fabric, if there are no defects, the fabric can pass through quickly, but if there are defects, the operation will be slower, and especially if some defects need to be corrected and inspected, which requires a long time. Generally, the inspection plant in a weaving factory operates for 8 hours, and the weaving process operates for 24 hours. Basically, the inspection time for each type of fabric matches the weaving time. The operating time of the fabric inspection process can be calculated using a formula: In the TIFF0007775497000142.tif8170 formula, TIFF0007775497000143.tif6170 is the operating time of the inspection process, and its unit is h. TIFF0007775497000144.tif6170 is the operating hours of the inspection process per 24 hours, and the unit is h.

[0035] (14)Design process In the design process, the main power consumers are computers, printers, lighting, etc. The design process can allocate the operating time for a certain type of textile according to the total annual production volume of textiles. In the TIFF0007775497000145.tif10170 formula, TIFF0007775497000146.tif6170 is the operating time of the design process, and its unit is h. TIFF0007775497000147.tif6170 is the operating time for each 24-hour period of the design process, and its unit is h. TIFF0007775497000148.tif6170 is the number of days the factory operates per year, TIFF0007775497000149.tif6170 is the total annual textile production volume of the factory in question, expressed in meters.

[0036] In S3, based on the working time of each production process calculated in S2, the calculation formula for the electricity consumption of each process is established according to the parameters of the equipment rated power and the equipment operating efficiency, and an equation for the annual electricity consumption including the single variable "operating efficiency" is constructed to calculate the operating efficiency of the industrial equipment. Specifically, in step S3, the electricity consumption of each silk weaving process is calculated based on the electricity consumption of four categories of lighting, fans, air conditioners and industrial equipment during production, and the corresponding equation for the annual electricity consumption including the single variable "operating efficiency" is as follows: TIFF0007775497000150.tif77170However, TIFF0007775497000151.tif6170 is the total electricity consumption of lighting, fans, air conditioners, and industrial equipment for all silk fabrics produced in the factory throughout the year, TIFF0007775497000152.tif6170 is the total electricity consumption of the factory's annual production, TIFF0007775497000153.tif5170 is the operating efficiency of the equipment, TIFF0007775497000154.tif8170 is the production time of the jth production process of the i-th variety of silk fabric, TIFF0007775497000155.tif6170 is the total power consumption of the lighting for the jth production process, TIFF0007775497000156.tif6170 is the total power consumption of the fan in the jth production process, TIFF0007775497000157.tif6170 is the number of days the fan was used throughout the year, TIFF0007775497000158.tif6170 is the total number of working days per year, TIFF0007775497000159.tif6170 is the total power consumption of the air conditioner for the jth production process, TIFF0007775497000160.tif6170 is the number of days that the air conditioner was used throughout the year, TIFF0007775497000161.tif6170 is the total power consumption of the industrial equipment in the jth production process, TIFF0007775497000162.tif7170 is the amount of electricity required to heat the water in the soaking process of the i-th variety of silk fabric. From this equation, the operating efficiency of the industrial equipment in the base year can be calculated. TIFF0007775497000163.tif5170 can be obtained.

[0037] In S4, the operating efficiency of the industrial equipment can be substituted into the equation for the electricity consumption of each process to calculate the electricity consumption of each production process of each type of silk fabric and the corresponding carbon footprint distribution of electricity for the silk fabric.

[0038] However, calculating the carbon footprint of the corresponding electricity based on the electricity consumption of four categories, including lighting, fans, air conditioning and industrial equipment, in each production process of each type of silk fabric is as follows: TIFF0007775497000164.tif10170However, TIFF0007775497000165.tif8170 is the kth power consumption category in the jth production process of the ith variety of silk fabric, and the power consumption categories refer to four types of power consumption: lighting, fans, air conditioners, and main equipment. TIFF0007775497000166.tif7170 is the carbon footprint of the kth electricity used in the jth production process of the ith variety of silk fabric, TIFF0007775497000167.tif7170 is the power discharge factor, TIFF0007775497000168.tif6170 is the total length of raw silk from the i-th variety of silk fabric.

[0039] The method for calculating the carbon footprint of electricity in the twisting and weaving stages of silk fabrics of the present invention first calculates the amount of warp and weft yarn used in the silk fabric, then calculates the working time of each production process based on the amount of warp and weft yarn used, then calculates the electricity consumption of each category in the production of silk fabrics based on the working time of each production process and the operating efficiency of the equipment, and finally calculates the carbon footprint of electricity of each category based on the electricity consumption of each category, thereby calculating the carbon footprint of electricity of each production process, which has high calculation accuracy. The calculation results are favorable to the carbon emission situation of each part, and make it easier to take corresponding measures to reduce carbon emissions in actual production.

[0040] Example 2 In this embodiment, the carbon footprint is calculated using the method for calculating the carbon footprint of electricity in the twisting and weaving stages of silk fabrics of the present invention as follows: A mulberry silk weaving factory in Zhejiang Province was investigated and the carbon footprint distribution at the weaving stage of one of the main types of fabric produced by the company was calculated, which was double crepe fabric.

[0041] The company profile is as follows: total production volume in 2020 was 1.103 million meters of fabric; total electricity consumption in 2020 was 1.302 million kW, with an average electricity consumption per meter of fabric of 1.18 kW·h; there are a total of eight types of fabric specifications; the basic specification parameters and processing parameters of each type of fabric have been researched and recorded; as an example, the basic specification parameters and processing parameters of double crepe fabric that need to be calculated are shown in Table 1.

[0042] [Table 1]

[0043] 1. Calculation of the amount of warp and weft used Based on the specified amount of warp yarn, the specified amount of weft yarn, and the length of the fabric in Table 1, the total amounts of warp yarn and weft yarn used for the product can be calculated using equations (1) and (2) to be 7,894.9 kg and 8,402.6 kg, respectively.

[0044] From the length of the fabric, the specified amount of warp and weft yarns, and the fineness of the raw silk in Table 1, the total length of the raw silk material for the warp and weft yarns can be calculated to be 3,383,525,000 meters and 3,601,104,000 meters, respectively.

[0045] From the total length of the raw silk used for the warp and weft threads, the number of warp threads combined, the number of weft threads combined, the warp twist shrinkage rate, and the weft twist shrinkage rate, the total lengths of the warp and weft threads can be calculated to be 1,126,150,000 meters and 719,901,000 meters, respectively.

[0046] 2. Estimation of equipment operating efficiency Based on the basic specification parameters of each fabric type and the processing parameters, the equation for the amount of electricity in which the variable shown in equation (20) is "equipment operating efficiency" can be enumerated, and the operating efficiency of the company's industrial equipment in 2020 can be calculated to be 40%.

[0047] 3. Calculation of work time for each process (1) Raw material inspection process The raw material inspection stage uses a sampling inspection method. In this example, one sampling inspection is carried out for every 60 kg of raw yarn. The average time required for each sampling inspection is 0.32 hours. Based on the total weight of warp and weft yarns, the total time required for the process can be calculated to be 86.9198 hours.

[0048] (2) Soaking process The company has a total of six soaking tanks, soaking the warp threads for 1.5 hours and the weft threads for 2 hours, soaking 60 kg of raw silk in each tank. Based on the total amount of warp and weft threads used, the processing time for the soaking process can be calculated as 79.5763 hours.

[0049] (3) Dehydration process After the yarn soaking is complete, the fabric needs to be dewatered. In this example, there is only one centrifugal dewatering machine, which can dewater 60 kg of fabric in one cycle. The 60 kg of soaked fabric is dewatered twice, each time for 3 minutes. Based on the weight of the warp and weft yarns, the total dewatering time is calculated to be 2.2635 hours. This time is used for the main equipment. Lighting is ignored. In this factory, dewatering and soaking are performed in the same room, and the soaking time is long, so lighting is not repeated and is not calculated.

[0050] (4)Drying process In this example, the raw silk dries naturally after dehydration, eliminating the need for electricity for lighting or fans. A dehumidifier is used in conjunction with an air conditioner for approximately 30 days during the rainy season. Based on the length of the double crepe fabric and the total annual production volume (the total length of raw silk for all fabric varieties), the operating time for the raw material drying process for this fabric variety can be calculated to be 79.1630 hours.

[0051] (5) Thread winding process The time required for this process can be calculated to be 362.1659 hours from the production volume per hour per winding machine, the number of winding machines, and the total weight of the warp and weft yarns in Table 1.

[0052] (6) Doubling process From the warp and weft doubling speed, number of doubling threads, total length of raw silk, number of doubling machines, number of ingots for the doubling machine, etc. in Table 1, the operating time of the doubling process can be calculated to be 220.9278 hours.

[0053] (7) Twisting process From the twisting speed of the warp and weft yarns, the number of twisting machines, the number of ingots in the twisting machine, and the total length of the warp and weft yarns, the operating time of the twisting process can be calculated to be 619.1687 hours.

[0054] (8)Standard process In this example, the shaping is hot and humid shaping, and 60 kg of yarn can be shaped each time. Based on the shaping time of the warp and weft yarns each time, the shaping process time can be calculated to be 345.8766 hours.

[0055] (9) Rewinding process From the number of rewinding machines, the number of ingots per machine, the linear speed, the total length of the warp threads, and the total length of the weft threads, it can be calculated that the operating time of the rewinding machines is 1077.2940 hours.

[0056] (10) Warping process The main equipment in the warping process is a warping machine, and the operating time of the warping process can be estimated to be 52.6926 hours based on the total length of the fabric and the shrinkage rate in the warp direction. The shrinkage rate in the warp direction can be calculated from the indexes of the basic fabric coefficient, weft density, crepe increase rate, and the degree of difference in thickness between the weft and warp yarns.

[0057] (11) Preparation before weaving The preparation before weaving mainly includes the warp threading and knotting process and the loom preparation process. The operating times of these two processes can be obtained through direct research and can be 8 hours and 12 hours, respectively.

[0058] (12) Weaving process In this example, the equipment used in the weaving process is a rapier loom, with a loom efficiency of 95%. Furthermore, the operating time of the weaving process can be calculated to be 1131.0527 hours based on the loom speed, number of looms, weft density, and fabric length.

[0059] (13) Fabric inspection process In this example, the inspection plant in the weaving factory operates for 8 hours, and the weaving process operates for 24 hours. The inspection time for each product basically matches the weaving time. Therefore, the operating time for the fabric inspection process is 377.0176 hours.

[0060] (14)Design process The design process operates on an 8-hour schedule, and the total number of operating days per year is 280 days. Based on the percentage of the total length of the fabric of that variety that accounts for the total length of the fabric per year, the time required for the design process of the fabric of that variety can be calculated to be 246.2848 hours.

[0061] 4. Carbon footprint accounting Based on Equation (21), the carbon footprint distribution of each type of electricity consumption and each process electricity can be calculated. Taking one double crepe silk fabric as an example, the calculation results are shown in Table 2.

[0062] [Table 2]

[0063] Example 3 In this embodiment, the carbon footprint is calculated using the method for calculating the carbon footprint of electricity in the twisting and weaving stages of silk fabrics of the present invention as follows: A mulberry silk weaving factory in Zhejiang Province was investigated and the carbon footprint distribution at the weaving stage of one of the main types of fabric of the enterprise was calculated, which was twill silk fabric.

[0064] The company's profile is as follows: total production in 2019 was 1.569 million meters of fabric, total electricity consumption in 2019 was 1.615 million kW, and average electricity consumption per meter of fabric was 1.029 kWh. In 2019, the factory produced a total of seven varieties of fabric, and the basic specification parameters and processing parameters of each type of fabric were investigated and recorded. For example, the basic specification parameters and processing parameters of all the twill silk fabrics produced are shown in Table 3.

[0065] [Table 3]

[0066] 1. Calculation of warp and weft yarn usage Based on the specified amount of warp yarn, the specified amount of weft yarn, and the length of the fabric in Table 3, the total amounts of warp yarn and weft yarn used for the product can be calculated using equations (1) and (2) to be 4,956.4 kg and 5,929.3 kg, respectively.

[0067] From the length of the fabric, the specified amount of warp and weft yarns, and the fineness of the raw silk in Table 3, the total length of the raw silk material for the warp and weft yarns can be calculated to be 2,124,167,000 meters and 2,541,129,000 meters, respectively.

[0068] From the total length of the raw silk used for the warp and weft threads, the number of warp threads combined, the number of weft threads combined, the warp twist shrinkage rate, and the weft twist shrinkage rate, the total lengths of the warp and weft threads can be calculated to be 706,994,000 meters and 633,948,000 meters, respectively.

[0069] 2. Estimation of equipment operating efficiency Based on the basic specification parameters of each fabric type and the processing parameters, the power equation in which the variable shown in equation (20) is the "equipment operating efficiency" can be enumerated, and the operating efficiency of the company's industrial equipment in 2019 can be calculated to be 45%.

[0070] 3. Calculation of work time for each process (1) Raw material inspection process The raw material inspection stage uses a sampling inspection method. In this example, one sampling inspection is performed for every 60 kg of raw yarn. The average time required for each sampling inspection is 0.32 hours. Based on the total weight of warp and weft yarns, the total time required for this process can be calculated to be 26.4341 hours.

[0071] (2) Soaking process The company has a total of six immersion tanks, immersing the warp threads for 1.5 hours and the weft threads for 2 hours, with each tank immersing 60 kg of raw silk at a time. Based on the total weight of the warp and weft threads, the processing time for the immersion process can be calculated as 53.5922 hours.

[0072] (3) Dehydration process After the yarn soaking is complete, the fabric needs to be dewatered. In this example, there is only one centrifugal dewatering machine, which can dewater 60 kg of fabric in one cycle. Each 60 kg of fabric is dewatered twice, for 3 minutes each time. The total dewatering time is calculated based on the weight of the warp and weft yarns to be 1.5119 hours. This time is used for the main equipment. Lighting is ignored; in this factory, dewatering and soaking are performed in the same room, and the soaking time is long, so lighting is not repeated and is not calculated.

[0073] (4)Drying process In this example, the raw silk dries naturally after dehydration, eliminating the need for electricity for lighting or fans. A dehumidifier is used in conjunction with an air conditioner for approximately 30 days during the rainy season. Based on the length of the double crepe fabric and the total annual production volume (the total length of raw silk for all varieties of fabric), the operating time for the raw material drying process for this type of fabric can be calculated to be 58.3684 hours.

[0074] (5) Thread winding process The time required for this process can be calculated to be 241.9042 hours from the production volume per hour per winding machine, the number of winding machines, and the total weight of the warp and weft yarns in Table 1.

[0075] (6) Doubling process From the warp and weft doubling speed, number of doubling threads, total length of raw silk, number of doubling machines, number of doubling machine ingots, etc. in Table 3, the operating time of the doubling process can be calculated to be 241.9042 hours.

[0076] (7) Twisting process From the twisting speed of the warp and weft yarns, the number of twisting machines, the number of ingots in the twisting machine, and the total length of the warp and weft yarns, the operating time of the twisting process can be calculated to be 129.3347 hours.

[0077] (8)Standard process In this example, the forming is hot and humid forming, and 60 kg of yarn can be formed each time. Based on the forming time of the warp and weft yarns each time, the forming process time can be calculated to be 90.7141 hours.

[0078] (9) Rewinding process From the number of rewinding machines, the number of ingots per machine, the linear speed, the total length of the warp threads, and the total length of the weft threads, it can be calculated that the operating time of the rewinding machines is 782.5290 hours.

[0079] (10) Warping process The main equipment in the warping process is a warping machine, and the operating time of the warping process can be estimated to be 38.9019 hours based on the total length of the fabric and the shrinkage rate in the warp direction. The shrinkage rate in the warp direction can be calculated from the indexes of the basic fabric coefficient, weft density, crepe increase rate, and the degree of difference in thickness between the weft and warp yarns.

[0080] (11) Preparation before weaving The preparation before weaving mainly includes the warp threading and knotting process and the loom preparation process. The operating times of these two processes can be obtained through direct research and can be 8 hours and 12 hours, respectively.

[0081] (12) Weaving process In this example, the equipment used in the weaving process is a rapier loom, with a loom efficiency of 95%. Furthermore, the operating time of the weaving process can be calculated to be 878.3204 hours based on the loom speed, number of looms, weft density, and fabric length.

[0082] (13) Fabric inspection process In this example, the inspection plant in the weaving factory operates for 8 hours, and the weaving process operates for 24 hours. Basically, the inspection time for each product type matches the weaving time. Therefore, the operating time for the fabric inspection process is 292.7735 hours.

[0083] (14)Design process The design process operates on an 8-hour schedule, and the total number of operating days per year is 280 days. Based on the percentage of the total length of the fabric of that variety that accounts for the total length of the fabric per year, the time required for the design process of the fabric of that variety can be calculated to be 181.5905 hours.

[0084] 3. Estimation of equipment operating efficiency The theoretical electricity consumption formula can be calculated from the time required for each process in the previous step and the total power consumption of lighting, fans, air conditioners, and main production equipment in each process. The actual electricity consumption can be calculated by multiplying the annual electricity consumption per meter of fabric by the length of the fabric of that type, resulting in an operating efficiency of 45%.

[0085] 4. Carbon footprint accounting According to Equation (21), the carbon footprint distribution of each type of electricity consumption and each process electricity was calculated and shown in Table 4, respectively.

[0086] [Table 4]

[0087] The above embodiments are merely preferred embodiments provided to fully explain the present invention, and the scope of protection of the present invention is not limited thereto. Any equivalent replacements or conversions made by those skilled in the art based on the present invention are within the scope of protection of the present invention. The scope of protection of the present invention is determined by the claims.

Claims

1. A computer-implemented method for accounting for the carbon footprint of electricity used in the twisting and weaving stages of silk fabrics, comprising the steps of: In S1, the total weight of warp threads, the total weight of weft threads, the total length of raw silk for warp threads, the total length of raw silk for weft threads, the total length of warp threads, and the total length of weft threads of each type of silk fabric produced throughout the year at the factory are calculated, In S2, the working time for each production process of the silk fabric of each type is calculated based on the calculated total weight of the warp threads, total weight of the weft threads, total length of the raw silk for the warp threads, total length of the raw silk for the weft threads, total length of the warp threads, and total length of the weft threads; In step S3, based on the working time of each production process calculated in step S2, a calculation formula for the electricity consumption of each process is established according to the parameters of the equipment's rated power and operating efficiency, and an equation for the annual electricity consumption including the single variable operating efficiency is constructed, and the operating efficiency of the industrial equipment is calculated; The electricity consumption of each process of silk weaving is calculated based on the electricity consumption of four categories: lighting, fans, air conditioners, and main equipment during production. The equation for annual electricity consumption, including the corresponding single variable, operating efficiency, is as follows: however, are the total electricity consumption of lighting, fans, air conditioners, and industrial equipment for all silk fabrics produced in the factory throughout the year, respectively. is the total electricity consumption of the factory's annual production, is the operating efficiency of the equipment, is the production time of the jth production process of the i-th variety of silk fabric, is the total power consumption of the lighting for the jth production process, is the total power of the fans in the jth production process, is the number of days the fan was used throughout the year, is the total number of working days per year, is the total power consumption of the air conditioner in the jth production process, is the number of days that the air conditioner was used throughout the year, is the total power of the industrial equipment in the j-th production process, is the amount of electricity required to heat the water in the soaking process of the i-th variety of silk fabric, and from this equation, the operating efficiency of the industrial equipment in the base year is calculated as You can ask for The amount of electricity required to heat the water in the immersion step is calculated as follows: however, is the specific heat capacity of water, is the bath ratio for yarn immersion, is the total weight of the warp yarn, is the total weight of the weft yarn, is the final heating temperature of the water, is the average initial temperature of the water, In S4, the operating efficiency of the industrial equipment is substituted into the equation for the electricity consumption of each process to calculate the electricity consumption in each production process of each type of silk fabric and the corresponding carbon footprint distribution of electricity.

2. In step S4, calculating the carbon footprint of each type of electricity in each production process of each variety of silk fabric is as follows: however, is the k-th power consumption category in the j-th production process of the i-th variety of silk fabric, and the power consumption categories refer to four types of power consumption: lighting, fans, air conditioners, and industrial equipment, respectively; is the carbon footprint of the k-th electricity in the j-th production process of the i-th variety of silk fabric, is the power emission factor, The method for calculating the carbon footprint of electricity in the twisting and weaving stages of silk fabrics according to claim 1, characterized in that i is the total length of raw silk of the i-th variety of silk fabric.

3. Step S1 includes the following steps: In S11, the total weight of the warp yarns and the total weight of the weft yarns of the silk fabric are calculated using the following formulas: however, is the total length of raw silk in the silk fabric, is the given amount of warp threads per meter of raw silk, is the given amount of weft thread per meter of raw silk, In S12, the total length of the raw silk material for the warp and the total length of the raw silk material for the weft are calculated by the following formula: however, is the total length of the raw silk used as the warp thread, is the total length of raw silk used as the weft thread, is the fineness of the raw silk, In S13, the total length of the warp yarns and the total length of the weft yarns are calculated by the following formulas: however, is the total length of the warp threads, is the total length of the weft yarn, is the number of warp yarns, is the number of weft yarns, is the twist shrinkage of the warp yarn, The method for calculating the carbon footprint of electricity in the twisting and weaving stages of silk fabrics according to claim 1, characterized in that ρ is the twist shrinkage rate of the weft yarn.

4. The working time for the immersion process is calculated as follows: however, is the total number of immersion tanks, is the time of the immersion step, is the soaking time of the raw warp silk, is the soaking time of the raw silk for the weft, The method for calculating the carbon footprint of electricity used in the twisting and weaving stages of silk fabrics according to claim 1, wherein ρ is the weight of raw silk that can be immersed in the immersion tank at one time.

5. The working time for the winding process is calculated as follows: however, is the time for the winding process, is the production volume per hour per winding machine, is the number of bobbin winding machines, The working time for the doubling process is calculated as follows: however, is the time for the doubling process, is the linear speed of the doubling machine, is the number of doubling machines, is the number of ingots in the doubling machine, The working time for the twisting process is calculated as follows: however, is the time of the twisting process, is the linear velocity of the warp yarn during twisting, The method for calculating the carbon footprint of electricity in the twisting and weaving stages of silk fabrics according to claim 1, characterized in that: is the linear speed when twisting the weft yarn.

6. The working time for the warping process is calculated as follows: however, is the operation time of the warping process, and its unit is h, is the linear speed of the warper, its unit is m / min, is the number of warping machines, is the basic tissue coefficient, is the weft density, and its unit is threads / cm, is the crepe increase rate, The method for calculating the carbon footprint of electricity in the twisting and weaving stages of silk fabrics according to claim 1, characterized in that σ is an index of the degree of difference in thickness between the weft and warp threads.

7. The method for calculating the carbon footprint of electricity in the twisting and weaving stages of silk fabrics as described in claim 1, characterized in that the production process includes 15 production processes: raw material inspection process, soaking process, dewatering process, drying process, yarn winding process, doubling process, twisting process, shaping process, rewinding process, warping process, warp threading and warp knotting process, loom preparation process, weaving process, fabric inspection process, and design process.

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