Economic Analysis of Large-Scale Biogas Project Based on System Dynamics

2013 ◽  
Vol 483 ◽  
pp. 429-433
Author(s):  
Li Li Wang ◽  
Li Jun Zhao ◽  
Li Ma ◽  
Guang Lin Yang ◽  
Wen Zhe Li
Keyword(s):  
Economic Analysis ◽  
System Dynamics ◽  
Large Scale ◽  
Theoretical Foundation ◽  
Supply And Demand ◽  
Heilongjiang Province ◽  
Analysis And Evaluation ◽  
Medium Scale ◽  
Social Ecological ◽  
Commercial Operation

With the application and promotion of large-scale biogas project, economic analysis and evaluation of large-scale biogas project are particularly important. However, the benefits of biogas project embodied in the economic, social, ecological, and many other aspects have dispersion, which leads to production decisions in a gray state and investment in conformity. In this paper, the biogas project in Zhuangda village, Zhaozhou County, Heilongjiang province is taken as an example, the supply and demand of funds in project operation are analyzed quantitatively by using system dynamics theory so as to study the economics of biogas project comprehensively, which can provide scientific guidance for evaluating the construction and operation of large and medium-scale biogas project objectively and lay a solid theoretical foundation for the commercial operation in biogas industry.

Study on the Supply and Demand Balance of Large-Scale Biogas Project Funds Based on System Dynamics

2013 ◽  
Vol 869-870 ◽  
pp. 466-470
Author(s):  
Li Li Wang ◽  
Kang Ni Cai
Keyword(s):  
System Dynamics ◽  
Electricity Generation ◽  
Large Scale ◽  
Theoretical Foundation ◽  
Supply And Demand ◽  
Cattle Industry ◽  
Analysis And Evaluation ◽  
Optimal Analysis ◽  
Social Ecological ◽  
Commercial Operation

With the application and promotion of large-scale biogas project, economic analysis and evaluation of large-scale biogas project are particularly important. However, the benefits of biogas project embodied in the economic, social, ecological, and many other aspects have dispersion, which leads to production decisions in a gray state and investment in conformity. In this paper, Great Northern Wilderness beef cattle industry in Heilongjiang province is taken as an example for large-scale biogas electricity generation project. The supply and demand of funds in project operation are analyzed quantitatively by using system dynamics theory so as to do study and perform optimal analysis comprehensively on the economics of biogas project, and to explore the effective scheme of improving the proportion of income against cost. This study can provide scientific guidance for evaluating the construction and operation of large and medium-scale biogas project objectively and lay a solid theoretical foundation for the commercial operation in biogas industry.

scholarly journals ANALISA SUPPLY DAN DEMAND BETON READYMIX DI KOTA MALANG

2015 ◽  
Vol 9 (1) ◽  
pp. 8
Author(s):  
Angga Saputra Dwi Wardhana, Suhariyanto, Sugeng Riyanto
Keyword(s):  
Construction Projects ◽  
Large Scale ◽  
Supply And Demand ◽  
Descriptive Study ◽  
Small Scale ◽  
Medium Scale ◽  
Great Demand ◽  
Qualitative Descriptive ◽  
Concrete Mixer ◽  
Normal Production

As civil constructions are growing rapidly in Malang, readymix concrete is in a great demand. The writer intends to find out the capacity of average readymix supply of 4 different companies, the capacity of average readymix demand of some construction projects in Malang, and some influential problems of both readymix supply and demand. This thesis includes a qualitative descriptive study. Questionnaires were distributed to some users and producers of readymix concrete in Malang.The questionnaires result is average 117.5 m3/day capacity of readymix supply in normal production and average 200 m3/day capacity of readymix supply in peak production, average 92 m3/day capacity of readymix demand large scale users, average 45 m3/day capacity of readymix demand medium scale users, average 17 m3/day capacity of readymix demand small scale users, and some problems of less material to make readymix concrete and less concrete mixer truck unit to service users.Keywords: demand, producer, readymix concrete, supply, user

scholarly journals Dynamics Analysis Using Koopman Mode Decomposition of a Microgrid Including Virtual Synchronous Generator-Based Inverters

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4581
Author(s):  
Yuko Hirase ◽  
Yuki Ohara ◽  
Naoya Matsuura ◽  
Takeaki Yamazaki
Keyword(s):  
Power System ◽  
System Dynamics ◽  
Dimensional Space ◽  
Supply And Demand ◽  
Transient State ◽  
Synchronous Generator ◽  
Response Analysis ◽  
Power System Dynamics ◽  
Mode Decomposition ◽  
Virtual Synchronous Generator

In the field of microgrids (MGs), steady-state power imbalances and frequency/voltage fluctuations in the transient state have been gaining prominence owing to the advancing distributed energy resources (DERs) connected to MGs via grid-connected inverters. Because a stable, safe power supply and demand must be maintained, accurate analyses of power system dynamics are crucial. However, the natural frequency components present in the dynamics make analyses complex. The nonlinearity and confidentiality of grid-connected inverters also hinder controllability. The MG considered in this study consisted of a synchronous generator (the main power source) and multiple grid-connected inverters with storage batteries and virtual synchronous generator (VSG) control. Although smart inverter controls such as VSG contribute to system stabilization, they induce system nonlinearity. Therefore, Koopman mode decomposition (KMD) was utilized in this study for consideration as a future method of data-driven analysis of the measured frequencies and voltages, and a frequency response analysis of the power system dynamics was performed. The Koopman operator is a linear operator on an infinite dimensional space, whereas the original dynamics is a nonlinear map on a finite state space. In other words, the proposed method can precisely analyze all the dynamics of the power system, which involve the complex nonlinearities caused by VSGs.

Effects of Trust and Threat Messaging on Academic Cheating: A Field Study

2021 ◽  
pp. 095679762097751
Author(s):  
Li Zhao ◽  
Jiaxin Zheng ◽  
Haiying Mao ◽  
Xinyi Yu ◽  
Jiacheng Ye ◽  
...  
Keyword(s):  
Field Study ◽  
Academic Integrity ◽  
Large Scale ◽  
Theoretical Foundation ◽  
Empirical Evaluation ◽  
Psychological Theory ◽  
Field Studies ◽  
Educational Institutions ◽  
Academic Cheating ◽  
College Classrooms

Morality-based interventions designed to promote academic integrity are being used by educational institutions around the world. Although many such approaches have a strong theoretical foundation and are supported by laboratory-based evidence, they often have not been subjected to rigorous empirical evaluation in real-world contexts. In a naturalistic field study ( N = 296), we evaluated a recent research-inspired classroom innovation in which students are told, just prior to taking an unproctored exam, that they are trusted to act with integrity. Four university classes were assigned to a proctored exam or one of three types of unproctored exam. Students who took unproctored exams cheated significantly more, which suggests that it may be premature to implement this approach in college classrooms. These findings point to the importance of conducting ecologically valid and well-controlled field studies that translate psychological theory into practice when introducing large-scale educational reforms.

scholarly journals Process Simulation and Techno-Economic Analysis of Large-Scale Bioproduction of Sweet Protein Thaumatin II

Foods ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 838
Author(s):  
Kirolos D. Kelada ◽  
Daniel Tusé ◽  
Yuri Gleba ◽  
Karen A. McDonald ◽  
Somen Nandi
Keyword(s):  
Economic Analysis ◽  
Process Simulation ◽  
Large Scale ◽  
Recombinant Expression ◽  
Molecular Farming ◽  
Consumer Preference ◽  
Production Method ◽  
Long Term Effects ◽  
Adverse Health Effects ◽  
Sweet Proteins

There are currently worldwide efforts to reduce sugar intake due to the various adverse health effects linked with the overconsumption of sugars. Artificial sweeteners have been used as an alternative to nutritive sugars in numerous applications; however, their long-term effects on human health remain controversial. This led to a shift in consumer preference towards non-caloric sweeteners from natural sources. Thaumatins are a class of intensely sweet proteins found in arils of the fruits of the West-African plant Thaumatococcus daniellii. Thaumatins’ current production method through aqueous extraction from this plant and uncertainty of the harvest from tropical rainforests limits its supply while the demand is increasing. Despite successful recombinant expression of the protein in several organisms, no large-scale bioproduction facilities exist. We present preliminary process design, process simulation, and economic analysis for a large-scale (50 metric tons/year) production of a thaumatin II variant using several different molecular farming platforms.

Network effect in shared supply chain platform value co-creation behavior in evolutionary game1

2021 ◽  
pp. 1-12
Author(s):  
Zou Xiaohong ◽  
Chen Jinlong ◽  
Gao Shuanping
Keyword(s):  
Boundary Condition ◽  
Supply Chain ◽  
Large Scale ◽  
Simulation Analysis ◽  
Supply And Demand ◽  
Evolutionary Game ◽  
Dynamic Game ◽  
Network Effect ◽  
Chain Model ◽  
The Cost

The shared supply chain model has provided new ideas for solving contradictions between supply and demand for large-scale standardized production by manufacturers and personalized demands of consumers. On the basis of a platform network effect perspective, this study constructs an evolutionary game model of value co-creation behavior for a shared supply chain platform and manufacturers, analyzes their evolutionary stable strategies, and uses numerical simulation analysis to further verify the model. The results revealed that the boundary condition for manufacturers to participate in value co-creation on a shared supply chain platform is that the net production cost of the manufacturers’ participation in the platform value co-creation must be less than that of nonparticipation. In addition, the boundary condition for the shared supply chain platform to actively participate in value co-creation is that the cost of the shared supply chain platform for active participation in value co-creation must be less than that of passive participation. Moreover, value co-creation behavior on the shared supply chain platform is a dynamic game interaction process between players with different benefit perceptions. Finally, the costs and benefits generated by the network effect can affect value co-creation on shared supply chain platforms.

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