Energy, exergy, and economic analyses of a novel biomass-based multigeneration system integrated with multi-effect distillation, electrodialysis, and LNG tank

Desalination ◽  
2022 ◽  
Vol 526 ◽  
pp. 115550
Author(s):  
Yan Cao ◽  
M. Kasaeian ◽  
H. Abbasspoor ◽  
Moein Shamoushaki ◽  
M.A. Ehyaei ◽  
...  
Keyword(s):  
2019 ◽  
Vol 38 (8) ◽  
pp. 669-671 ◽  
Author(s):  
Dawn K. Wilson ◽  
Alan Christensen ◽  
Paul B. Jacobsen ◽  
Robert M. Kaplan

2020 ◽  
Vol 4 (1) ◽  
pp. 1-12
Author(s):  
Elizabeth C. Lopardo ◽  
Clare M. Ryan

Four dams on the lower Snake River in Washington State generate hydropower and allow for regional agriculture and barge shipping to Portland OR. However, the dams impede the migration of local salmon populations (Oncorhynchus spp.), which are in steep decline, and drastically impact the populations of salmon and orca whales, for whom salmon are a primary food source. For years, environmental groups have argued for breaching the dams; other interests counter that the dams are too critical to the economy of the region to lose; and federal agencies assert that the dams can remain and salmon populations will recover with mitigation techniques. Scientific and economic analyses, litigation, and elected officials’ efforts have not been able to move the issue towards a solution. Readers will examine the interests of primary actors in the issue, how they influence the policy process, the role of scientific and economic analyses, and possible approaches for resolving the issue.


2020 ◽  
Vol 26 (7) ◽  
pp. 1571-1589 ◽  
Author(s):  
O.V. Shimko

Subject. This article explores the key liquidity figures of the twenty five largest public oil and gas companies between 2006 and 2018. Objectives. The article aims to determine the current values of the key liquidity figures of the largest public oil and gas companies, identify key trends in their changes within the study period, and identify the factors that have caused these changes. Methods. For the study, I used comparative, and financial and economic analyses, and generalization. Results. Based on a comprehensive analysis of the twenty five oil and gas companies' annual reports, the article identifies trends in the changes in the key liquidity indexes in the industry's public sector, and establishes the main factors that affected these changes. Conclusions and Relevance. The largest public oil and gas companies are able to maintain their own liquidity in times of crisis, even. The industry pays the most attention to increasing the instant liquidity ratios. The results of the study can be used to evaluate, forecast, and develop measures to enhance the liquidity of public oil and gas companies.


2020 ◽  
Vol 26 (12) ◽  
pp. 2765-2789
Author(s):  
O.V. Shimko

Subject. This article explores the market valuation ratios of the twenty five leading public oil and gas companies between 2006 and 2018. Objectives. The article aims to identify key trends in the changes in market valuations of the largest public oil and gas companies, and identify the factors that have caused these changes. Methods. For the study, I used comparative, and financial and economic analyses, and generalization of materials of the companies' consolidated financial statements. Results. The article shows certain changes in the main indicators of market valuation of the leading public oil and gas companies and identifies the main factors that contributed to these changes. It establishes that the most significant for comparison and valuation are ratios based on balance sheet values of assets and equity, and EBITDA, DACF and net income ratios are appropriate as auxiliary ratios. The article says that the exchange segment of the industry has increased the debt load, so instead of market capitalization as a component of the coefficients of this group, it is advisable to apply the company's value indicator. Conclusions and Relevance. The article concludes that the market sentiments towards the stock market segment of the global oil and gas industry are getting impaired. This is quite natural against the background of falling profitability of most leading companies. The results of the study can be useful in evaluating, forecasting and developing measures to increase the market capitalization and value of public oil and gas companies.


2016 ◽  
Vol 54 (10) ◽  
pp. 1015-1021
Author(s):  
T. Sasaki ◽  
T. Hayashi ◽  
K. Maeda ◽  
K. Sakurai

2020 ◽  
pp. 122-127
Author(s):  
A. A. Tarasenko ◽  
P. V. Chepur ◽  
A. A. Gruchenkova
Keyword(s):  

1996 ◽  
Vol 34 (11) ◽  
pp. 125-132 ◽  
Author(s):  
Baozhen Wang ◽  
Wenyi Dong ◽  
Jinlan Zhang ◽  
Xiangdong Cao

The results of an experimental study conducted in a full-scale high rate pond system treating piggery wastewater at Jianfengshan Piggery, Panyu City, Guandong Province, are presented. The system consists of two advanced anaerobic ponds (AAP) in parallel, followed by an anaerobic transformation pond (ATP) and a five-cell algae-bacterial pond (ABP). The mechanism of the AAP is described and the hydraulic flow pattern analyzed. Fermentation pits (FP) built on the bottom performed very efficiently, operating like UASB in principle. A new concept of ATP is advanced, based on its ability to transform poorly degradable materials to more easily degradable ones. It was found in the study that the HRP system was more efficient, more reliable and saved 40% land area compared with a conventional pond system. Economic analyses of both the energy consumption and the benefit to the pond system of fish farming are also included in the paper.


Author(s):  
Tomohiko TAKAHASHI ◽  
Hiroyuki YAMABE ◽  
Taira YAMAMOTO ◽  
Masato NIIDA ◽  
Tatsuya YAMANASHI

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