Measurement of returns to scale on large photovoltaic power stations in the United States and Germany

2017 ◽  
Vol 64 ◽  
pp. 306-320 ◽  
Author(s):  
Toshiyuki Sueyoshi ◽  
Mika Goto
1986 ◽  
Vol 57 (3) ◽  
pp. 225 ◽  
Author(s):  
Michael R. Greenberg ◽  
Donald A. Krueckeberg ◽  
Michael Kaltman ◽  
William Metz ◽  
Charles Wilhelm

Climate Law ◽  
2011 ◽  
Vol 2 (4) ◽  
pp. 485-513 ◽  
Author(s):  
Brian J. Preston

In recent years, the number of court cases around theworld raising the issue of climate change has increased dramatically, especially in jurisdictions that have not yet adopted effective national responses to climate change, such as Australia and the United States. In these countries, litigation provides an alternative path to encourage mitigation of the causes and adaptation to the effects of climate change. In Australia, much of the litigation, particularly the early climate change cases, has taken place in state courts or administrative tribunals, and has focused on applying existing legislation to require government decision-makers to consider future climate-associated risks in planning decisions. The influence of these cases have been wide reaching, leading to the revision or formulation of government policies on mining and coastal management. Other cases, particularly within federal courts, have been less successful, but have nonetheless highlighted areas in need of law reform. In the United States, recent high-profile cases targeting major sources of greenhouse gas emissions including power stations have raised novel arguments based on common law public nuisance grounds and the public trust doctrine. This article examines the extent to which climate change litigation, mainly in Australia, but also in the United States, has influenced government decision-makers, legislatures, and polluters to curb emissions and adapt to the impacts of climate change.


Energies ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2454 ◽  
Author(s):  
Toshiyuki Sueyoshi ◽  
Mika Goto

To change an increasing trend of energy consumption, many counties have turned to solar thermal energy as a solution. Without greenhouse gas emissions, solar thermal power stations may play a vital role in the energy industry because they have a potential to produce electricity for 24 h per day. The goal of this study is to select solar thermal power stations from three regions (i.e., the United States, Spain and the other nations) throughout the world and to identify which region most efficiently produces solar thermal power energy. To measure their efficiencies, we use data envelopment analysis as a method to examine the performance of these power stations. Our empirical results show that the United States currently fields the most efficient solar thermal power stations. This study also finds that parabolic trough technology slightly outperforms the other two technologies (i.e., heliostat power tower and linear Fresnel reflector), but not at the level of statistical significance. In addition to the proposed efficiency assessment, we incorporate a new way of finding a possible existence of congestion. The phenomenon of congestion is separated into output-based and input-based occurrences. Output-based congestion implies a capacity limit (e.g., difficulties in transmission, voltage control and dispatch scheduling) in a grid network between generation and end users. Input-based congestion occurs when generators use “uncontrollable inputs” (e.g., sunlight hours). Renewable energy sources, such as solar thermal power, are indeed important for our future sustainability. However, this needs performance assessment on generation and transmission through which electricity generated by renewable energy is conveyed to end users. Such a holistic assessment, including both efficiency measurement and congestion identification, serves as a major component in evaluating and planning renewable energy generation.


Solar Energy ◽  
2003 ◽  
Author(s):  
Ward Bower ◽  
Wendy Parker

Photovoltaic power systems of all types are being installed in the United States. Grid-connected installations have seen a tremendous jump in their numbers and sizes of installations but there is no complete photovoltaic product (component or system) or installer certification program in effect today in the United States. Standards for utility interconnect, listing for safety, and qualification of hardware are written and listing and qualification programs are available, but practitioner and hardware certifications are not yet in place. This paper addresses the timeliness, framework, and progress of hardware and practitioner certification efforts currently under way in the United States.


Significance The potential benefits are so attractive that governments and firms have begun the groundwork. Over the past two years, the focus of commercial and state initiatives has shifted from asteroids to the moon. Impacts The United States, China and Japan are the likeliest candidates to mine in space. Water, as the basis for fuel, will be the most accessible and attractive resource initially. Orbital or lunar solar power stations are the technology with the greatest potential impact.


2000 ◽  
Vol 52 (3) ◽  
pp. 285-294 ◽  
Author(s):  
W.C. Losinger ◽  
R.K. Sampath

Manure production on grower/finisher swine operations in the United States was examined using data from 184 grower/finisher swine operations that participated in the United States National Animal Health Monitoring System's 1995 National Swine Study. Two methods were used: one, assuming that pigs produced 8.4% of their body weight in manure each day; another using the difference between feed fed and weight gained as a proxy variable to study manure production. Using this latter approach, a production function was developed. The function exhibited diminishing returns to scale when food waste was not fed to pigs, but constant returns to scale when food waste was included in their diets. The difference between feed fed and weight gained was lower on operations that restricted entry to employees only.


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