Empirical study of comprehensive benefits for prefabricated buildings: A case study of Hefei city

2020 ◽  
pp. 002072092092846 ◽  
Author(s):  
Zhao Weishu ◽  
Zhang Beibei ◽  
Yang Yang
Keyword(s):  
Evaluation Model ◽  
Economic Benefits ◽  
Environmental Benefits ◽  
Evaluation Indexes ◽  
Benefit Evaluation ◽  
Theoretical Support ◽  
Benefit Level ◽  
Analysis Theory ◽  
Comprehensive Benefit ◽  
Building Project

The emergence of prefabricated buildings is helpful to solve the problems of serious energy consumption and environmental pollution in traditional cast-in-place buildings. However, the current unclear benefits of prefabricated buildings have led to great constraints on its development in China. Therefore, in order to clarify the comprehensive benefit level of prefabricated buildings and promote the development of prefabricated buildings, the comprehensive benefits of prefabricated buildings are analyzed from four aspects of economy, environment, society, and security, and 19 evaluation indexes of economic benefits, environmental benefits, social benefits, and safety benefits of prefabricated buildings are selected from the life cycle dimension in this paper. The comprehensive benefits of prefabricated buildings are constructed by using set pair analysis theory. Finally, through the analysis of the prefabricated building project in Hefei, the feasibility of the model was verified, and comprehensive benefit level of prefabricated buildings in Hefei was further judged. This paper provides a feasible and operable evaluation model for the comprehensive benefit evaluation of prefabricated buildings and also provides a theoretical support for the development of prefabricated buildings.

scholarly journals Cost-benefit evaluation of different low NOx combustors of natural gas boilers in Beijing

2021 ◽  
Vol 236 ◽  
pp. 01021
Author(s):  
Penglai Zuo ◽  
Quanming Liang ◽  
Chenlong Wang ◽  
Jiajia Gao ◽  
Tao Yue ◽  
...  
Keyword(s):  
Natural Gas ◽  
Evaluation Model ◽  
Nox Reduction ◽  
Cost Benefit ◽  
Economic Benefits ◽  
Environmental Benefits ◽  
Nox Emission ◽  
Benefit Evaluation ◽  
Combustion Technology ◽  
Low Nox Combustion

This study focuses on establishing a cost-benefit evaluation model of low NOx combustion technology and the environmental benefits and economic benefits evaluation of technology operation were carried out as well. Results showed that: (1) The operation cost per unit calorific supply of the low NOx combustor with larger capacity (14 MW) boilers was 1.5-2.1 yuan/GJ, which was 22.3% to 26.2% as much as that of boilers with smaller capacity (0.7 MW). Compared with scattered boilers with smaller capacity, it is more economical to use boilers with larger capacity for centralized heating. (2) The lower the NOx emission concentration was, the greater the NOx emission reduction was. Furthermore, the lower the NOx emission benefits of low NOx combustor per unit calorific supply was, the greater the economic benefit of NOx reduction per unit calorific supply was. Based on the environmental and economic benefits analysis, the lean premixed combustor is recommended for natural gas boilers with capacity of 7 MW and below, and flue gas recirculation combustor (FGR-30) could be selected for natural gas boilers with capacity above 7 MW to achieve the NOx retrofits requirements of 30 mg/m3 or 80 mg/m3.

Model Research on Comprehensive Efficiency Evaluation of Heating Reconstruction Project

2013 ◽  
Vol 805-806 ◽  
pp. 1593-1597
Author(s):  
Ze Hong Li ◽  
Xiao Dan Zhang
Keyword(s):  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Social Benefit ◽  
Scientific Basis ◽  
Evaluation Index System ◽  
Environmental Benefit ◽  
Benefit Evaluation ◽  
Comprehensive Benefit ◽  
Project Construction ◽  
Reconstruction Project

Combined heat and power generation is also called the heating reconstruct project, comprehensive benefit evaluation of heating reconstruction project provide a more scientific basis for project construction and project operation, strengthen scientificalness for decision-making , avoid investing blindly and improve investing returns of the project. To begin with, it is emphasize on the analysis of the project whole, and then established evaluation index system and comprehensive evaluation model based on financial and non-financial data collecting of the project. At the third, evaluating the financial feasibility, project environmental benefit and social benefit evaluation of the heating reconstruction project. Eventually, it comes to a conclusion for a validation of heating reconstruction project feasibility.

Embedded Computer Performance Evaluation Model Based on Weight Contact Coefficient

2014 ◽  
Vol 951 ◽  
pp. 208-213
Author(s):  
Yong Bin You ◽  
Shan Shan Zhao ◽  
Rui Jun Jing ◽  
Li Yan Liu
Keyword(s):  
Performance Evaluation ◽  
Evaluation Model ◽  
Order Relation ◽  
Optimal Program ◽  
Computer Performance ◽  
Evaluation Indexes ◽  
Embedded Computer ◽  
Performance Evaluation Model ◽  
Analysis Theory ◽  
Pair Analysis

Because the embedded computer performance evaluation indexes are uncertainty, the better method of embedded computer performance evaluation is proposed by applying the set pair analysis theory. First, identical degree, different degree, and contrary degree are respectively determined by the optimal program, intermediate program and worst program, and the weight of performance evaluation indexes are determined by order relation analysis. Finally, the weight contact coefficient is obtained, and the sort of embedded computer performance is determined by situation of weight contact coefficient. The experimental results show that this method can effectively evaluate the embedded computer performance, and the evaluation results are in line with the actual situation.

The Quantitative Evaluation Research of Grid Planning Economy Based on Improved DEA Model

2013 ◽  
Vol 278-280 ◽  
pp. 2163-2171 ◽  
Author(s):  
Hui Li ◽  
Jin Chao Li ◽  
Zi Fa Liu ◽  
Zhi Dong Wang ◽  
Wei Shu Li
Keyword(s):  
Quantitative Evaluation ◽  
Index System ◽  
Cost Benefit Analysis ◽  
Evaluation Model ◽  
Evaluation Research ◽  
Cost Benefit ◽  
Economic Benefits ◽  
Environmental Benefits ◽  
Dea Model ◽  
Grid Planning

To solve the problem for the complexity of the quantitative evaluation of grid planning economy, in accordance with the principle of cost-benefit analysis, and combined with the characteristics of UHV power grid, we construct an input-output index system which contains the planning costs, economic benefits, the benefits of interconnection, environmental benefits, social benefits and other benefits in this paper. And for the problem of comparison between unexpected output indicators and effective unit that exists in the index system, we improve the traditional data envelopment analysis (DEA), and build a quantitative evaluation model of grid planning economy based on the improved DEA model. Finally, use the data of the planning program of a UHV grid, to test and verify the established evaluation model. The results show that the model is reasonable and effective.

scholarly journals Benefit analysis and evaluation of virtual power plants considering electric vehicles

2021 ◽  
Vol 248 ◽  
pp. 02024
Author(s):  
Tan Caixia ◽  
Tan Zhongfu ◽  
Wu Jianbin ◽  
Qi Huiwen ◽  
Zhang Xiangyu ◽  
...  
Keyword(s):  
Environmental Pollution ◽  
Electric Vehicles ◽  
Power Plants ◽  
Evaluation Model ◽  
Virtual Power ◽  
Benefit Evaluation ◽  
Virtual Power Plants ◽  
Comprehensive Benefit ◽  
The Index System ◽  
Distributed Energy Generation

Under the background of increasingly serious environmental pollution, virtual power plants have become an effective way to solve environmental pollution due to the characteristics of integrating a large number of clean distributed energy generation. At the same time, electric vehicles with dual attributes of power supply and load bring opportunities for the further development of virtual power plants. In this paper, the ideal matter-element comprehensive benefit evaluation model of virtual power plants is constructed by constructing the index system and weighting model of virtual power plants considering electric vehicles. The virtual power plants connected with different proportion of electric vehicles are taken as an example analysis. The results of the example analysis show that the comprehensive benefit of virtual power plants is the highest when the proportion of electric vehicles access reaches 120%.

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