Quantitative method of industrial eco-efficiency based on emergy conversion

Abstract

The invention relates to an emergy conversion type industrial ecological efficiency quantitative method. The method is as follows: convert the material consumption of the industrial system and the waste discharge of the industrial system into comparable energy value units that can be added or subtracted, and express the reciprocal of the sum of the material consumption intensity and waste discharge intensity as the industrial ecological 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, through the comprehensive expression of the minimization of environmental impact and material consumption per unit of industrial system, and the maximization of economic output The development quality and eco-efficiency of industrial systems are high or low. The present invention decomposes the industrial ecological efficiency into material consumption intensity and waste discharge intensity modules, and describes the size of industrial ecological efficiency according to the reciprocal of the sum of material consumption per unit of industrial added value and waste discharge per unit of industrial added value through emergy conversion , to improve the comparability, comprehensiveness and scientificity of industrial eco-efficiency.

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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