Emergy conversion type quantitative method for industrial eco-efficiency

Abstract

The invention relates to an energy conversion type quantitative method for industrial eco-efficiency. The method includes converting material consumption of an industrial system and waste emission ofthe industrial system into comparable, additive and subtractive emergy units, and expressing the reciprocal of the sum of material consumption intensity and waste emission intensity as industrial eco-efficiency. Taking the material consumption per unit of industrial added value as the material consumption intensity and the waste discharge per unit of industrial added value as the waste discharge intensity, the development quality and ecological efficiency of the industrial system are comprehensively expressed through the minimization of the unit environmental impact and material consumption and the maximization of economic output of the industrial system. The invention decomposes the industrial eco-efficiency into a material consumption intensity module and a waste discharge intensity module, and characterizes the size of the industrial eco-efficiency according to the reciprocal of the sum of the material consumption amount and the waste discharge amount of the unit industrial added value and improves the comparability, comprehensiveness and scientificity of the industrial eco-efficiency through the conversion of the emergy value.

Description

technical field [0001] The invention relates to the technical fields of industrial economic quality transformation and industrial ecological efficiency, in particular to an emergy conversion type industrial ecological efficiency quantitative method. Background technique [0002] The connotation of eco-efficiency. The definition and interpretation of eco-efficiency by international organizations is relatively comprehensive, macroscopic and abstract. For example, WBCSD (1993) defines eco-efficiency as "while providing products and services with competitive prices to meet basic human needs and improve the quality of life, At least the environmental impact and resource consumption intensity of the entire life cycle should be gradually reduced to a level consistent with the estimated value of the earth’s carrying capacity”; specifically, reducing resource consumption intensity, reducing energy consumption intensity, reducing toxic substance emissions, strengthening material recyc...

AI Technical Summary

Problems solved by technology

This model is widely used. However, the traditional DEA model does not eliminate the influence of external environment and random errors, and cannot objectively reflect the decision-making and management level of production units.

The DEA model has unique advantages in eliminating dimensions and reducing the subjectivity of weighting, but the DEA model has the following defects: it requires a large amount of reliable data and reference samples, and when the sample size is small, it cannot reflect the original information of the system; If there is a strong correlation with the output variable, the effectiveness of the decision-making unit will generally be close to 1, and the lack of differentiation will affect the accuracy of the evaluation results; the greenhouse gas emissions, toxic substances emissions, etc. are also regarded as positive outputs, leading to the identification of unecological content as ecological

⑧Ecological cost / value index (EVR) is proposed based on the environmental impact prevention cost of products or services, that is, how much cost is required to prevent pollution and excessive resources in order to make the product not affect society and achieve sustainable development during its life cycle Consumption, the cost is called the ecological cost, the ratio of the ecological cost of the product or service to the actual market price is the ecological cost value index, the greater the value, the lower the ecological efficiency of the product, but this method uses the The market price does not take into account changes in the market price, so it cannot reflect the real value in some cases

However, the DEA model calculates the relative efficiency, the comprehensive index method needs to determine the weight of different indicators, and the data required by the material flow calculation method is difficult to obtain, so it is urgent to develop an excellent algorithm to overcome the above disadvantages

The emergy theory provides a new idea for the quantitative evaluation of eco-efficiency. However, at present, the emergy method is applied to industrial systems, and there are few studies on the quantitative evaluation of industrial eco-efficiency. The quantitative method of industrial eco-efficiency needs to be innovated.

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