Combined Cycle Equipment Standardization: How Much Is Too Much?

Author(s):  
Roger Fontes ◽  
Richard Casey ◽  
Robert Alder ◽  
Roger Prewitt

Many electric utilities in the United States are involved with construction of both combined cycle and combustion turbine generation. These utilities and the industry, as a whole, have the opportunity to carefully examine methods of equipment optimization when developing these new power stations. The Florida Municipal Power Agency (FMPA) anticipates installing at least three large combined cycle units and several smaller aero-derivative combustion turbine units within the next 15 years. As a generation owner and operator, FMPA management is examining lessons learned by other utilities, original equipment manufacturers and consulting engineers to develop a cost-effective approach to equipment standardization. This evaluation focuses on design, equipment procurement, as well as long-term operation and maintenance requirements.

2021 ◽  
Author(s):  
Yun Thiam Yap ◽  
Avinash Kishore Kumar

Abstract Typically, most of the well abandonment practice is reference to the recognized industry standards i.e. NORSOK, UK Oil & Gas and etc, and this is how the wells abandonment was carried out in the past. These practices however evolved/changed over time with lessons learnt and experiences and turn into a fit for purpose solutions for the Client. The shift in international and local standards and regulations for a robust plug and abandonment approach has placed the need for a better and long lasting permanent P&A methodology. Adhering to the existing industry standards in well abandonment is somehow not practical and not cost effective to be implemented in different part of the well, where there are major differences in local regulations, reservoir conditions, caprock thickness, well design philosophy and etc. The magnitude of abandonment cost increase is not at par with the risk reduction in long term hydrocarbon leakage. A fit for purpose solutions is recommended in closing the gap between cost and risk. Due to the extremely varied well architecture between wells, the approach to permanent abandonment varies depending on casing sizes, presence of packers and no of casings present to the caprock area. On top of that, identifying the highest depth for a placement of cement plug will reduce on the amount of plugs to be placed, saving rig time and operational time. So far, 16 idle wells have since been permanently abandoned with the systematic approach of applying caprock restoration concept and reinstating the poor isolation across caprock areas with cement with the assistance of technology to the likes of perf-wash-cement, and hydro mechanical casing cutter. These wells have successfully been abandoned as per host authority standards. This paper will explore a major local oil company’ approach to decommissioning of wells, in line with local regulations enforced, while ensuring a cost effective approach is applied in line with the available technologies.


Author(s):  
Tori Tomiczek ◽  
Brittany Webbmartin ◽  
Steven Scyphers ◽  
Kiera O’Donnell ◽  
Kelsi Furman

The 2017 Atlantic hurricane season had 17 named storms, 10 hurricanes, and 6 major hurricanes, generating over 226 units of accumulated cyclone energy (ACE), a measure used by the National Oceanographic and Atmospheric Association (NOAA) that refers to the combined the intensity and duration of a hurricane. These statistics earned the hurricane season’s classification as “extremely active,” the most active since 2005. Preliminary estimates of damage due to Hurricanes Harvey, Irma, and Maria amount to over $200 billion dollars in the United States alone. Recent studies suggest that the frequency of these high intensity Category 4 and 5 hurricanes is increasing (e.g. Mendelsohn et al., 2012). The 2017 hurricane season may thus be representative of an expected season. Accounting for projected increases in mean sea level, storm impacts may be exacerbated in coastal regions. These trends emphasize the need for effective damage mitigation techniques that improve the robustness and resiliency of coastal communities. Structures must be designed to not only avoid wave and surge loads, but also resist these forces in the event of a wave impact. Furthermore, creative, cost-effective solutions are required to mitigate waves and surge before they reach developed coastal areas. Thus, engineers require a robust, science-based methodology for predicting details of wave propagation over land and inland effects to ensure life safety and reduce economic loss due to extreme events. While traditional engineering strategies (e.g. seawalls, bulkheads) have been used to prevent coastal erosion and mitigate inland effects of hurricane waves and surge, recent storm events have shown potential of nature and natural based features (e.g. dune vegetation, mangroves, wetlands, salt-marshes, coral reefs, and seagrass) to protect coastal structures during storm events.


1998 ◽  
Vol 1624 (1) ◽  
pp. 132-139
Author(s):  
Mary Lou Ralls ◽  
Ramon L. Carrasquillo ◽  
Ned H. Burns

High-performance concrete (HPC) bridges can be cost-effective both initially and in the long term, provided the design and construction optimize the improved performance characteristics of HPC. Using the high-strength characteristic of HPC can reduce the required number and size of beams. Using the improved durability characteristics of HPC can reduce maintenance requirements and extend the service life. Practical guidelines help design and construction engineers implement HPC in bridges.


Energies ◽  
2020 ◽  
Vol 13 (10) ◽  
pp. 2507
Author(s):  
Sou-Sen Leu ◽  
Tao-Ming Ying

After the long-term operation of reservoir facilities, they will become nonoperational due to the material deterioration and the performance degradation. One of crucial decisions is to determine the maintenance or replacement of the facilities in a cost-effective manner. Conventional replacement models seldom consider the maintenance effect. The facilities after maintenance are generally not as good as new, but are relatively restored. The target of this study is to establish a replacement decision model of the reservoir facilities under imperfect maintenance. By combining the theories of reliability analysis, imperfect maintenance, and engineering economics, the best timing of replacement that achieves cost-effectiveness is analyzed and proposed. Lastly, based on the design of experiments (DOE) and simulation, the regression curve chart for the economical replacement decision is established. Once the failure rate, the age of recovery after maintenance, and the ratio of maintenance cost to replacement cost are estimated based on historical data, the cost-effective replacement time of hydraulic machinery facilities will be efficiently determined.


2009 ◽  
Vol 2009 (15) ◽  
pp. 2479-2494
Author(s):  
Christian Cabral ◽  
Eoin Syron ◽  
Ray C. Asencio ◽  
Chandler Johnson

2000 ◽  
Vol 51 (4) ◽  
pp. AB86
Author(s):  
Abraham Mathew ◽  
Ann Ouyang ◽  
Thomas R. Riley ◽  
Mark Young

2021 ◽  
pp. 875687052110493
Author(s):  
Brandy N. Brewer ◽  
Leah A. Riggs ◽  
Ginevra Courtade ◽  
Timothy J. Landrum

The COVID-19 pandemic has been one of the most dramatic and far-reaching events to impact education in recent years. At the onset of this global crisis, schools were required to pivot, with little warning or planning, to educate the more than 50 million school-aged children in the United States through some form of nontraditional instruction (NTI), which often involved technology-based distance education. While shifts to NTI for short time periods may be feasible for many students, the potential impact of long-term NTI on students with extensive support needs (ESNs) and their families, especially in rural areas, may be particularly acute. In this article, we discuss specific strategies that address and incorporate what we know about extended NTI in rural school districts, including both lessons learned and areas of concern, with particular attention to the role and importance of caregivers. We outline ways that caregivers can be supported and how natural environment teaching provides one useful framework for efforts to reduce skill regression and to increase the overall potential for skill generalization when traditional schooling is interrupted.


2021 ◽  
Vol 5 (Supplement_1) ◽  
pp. 160-160
Author(s):  
Rebecca Davis ◽  
Cheryl Monturo ◽  
Maria O'Reilly ◽  
Diana Sturdevant

Abstract The pandemic profoundly affected the care of older adults in long term care communities (LTCC) across the world. More than one third of pandemic deaths were linked to nursing homes. Most nations and states had strict guidelines on visitation, with many, especially in the United States, totally prohibiting visitation for over an entire year. Well-intentioned measures to protect through isolation caused a profound ethical tension between safety and self-determination. The aim of the project was to examine this dilemma using a case study and the Madison Collaborative Ethical Reasoning in Action Framework. Eight key questions of fairness, outcomes, rights, responsibilities, character, liberty, empathy, and authority were applied in the context of federal and state mandates in the US and Australia. Results highlighted issues of ageism, paternalism vs empathy, regulatory vs family authority, a focus on short-term outcomes while forfeiting long-term outcomes, community responsibilities to the resident trumped individual resident rights, the potential loss of community character in lieu of basic care provision, a loss of personal freedoms, and the emphasis of physical well-being over holistic well-being. The results of this analysis can inform future policy and provide lessons learned for the future.


2018 ◽  
Vol 4 (Supplement 3) ◽  
pp. 29s-29s
Author(s):  
Ann K. Novakowski ◽  
Pat Garcia-Gonzalez

Purpose The Max Foundation has led the development and implementation of the widely recognized model for patient assistance programs by which manufacturers make available some of their innovative products to patients in low- and middle-income countries. Recognizing that a limitation of a pharmaceutical patient assistance program is the focus on a particular product while a patient’s cancer need is company agnostic, the Max Access Solution borrows from all the lessons learned from developing and managing access programs while shifting the focus from the drug to the patient. This innovative long-term access approach provides a bridge to treatment to individually identified patients in countries where the treatment is not otherwise locally available. Methods The initiative focuses on the patient and his or her needs across the disease spectrum, harnessing the power of multisector collaborations, including drug manufacturers, international distributors, diagnostics companies, ministries of health, ministries of health hospitals, cancer centers and other public institutions in recipient countries, and local nongovernmental organizations and patient organizations, as well as cancer research centers in the United States. We established the following measurable objectives: identify all treatments approved for a particular cancer, identify the supportive care needed to successfully treat the disease, identify local and international stakeholders for the success of the initiative, develop collaborative agreements with each of them, and establish an end-to-end validated supply chain into each country/cancer institution. Results In the first year of implementation, The Max Foundation delivered more than 700,000 required daily doses of oral cancer medication for CML to more than 10,000 patients in 65 countries, made 2,500 molecular tests available to patients, executed more than 220 collaboration agreements, and established a gross domestic product–validated supply chain into 90 cancer-treating institutions. Conclusion The Max Access Solution is a unique and innovative approach to cancer care access. An aim of The Max Foundation in developing the Max Access Solution for CML was as a proof of concept as well as to develop systems and impact measurements, with the long-term vision of expanding the model to other cancers. This model may be replicated in a variety of noncommunicable disease areas, including breast cancer and other cancers, to reduce health disparities globally. AUTHORS' DISCLOSURES OF POTENTIAL CONFLICTS OF INTEREST The following represents disclosure information provided by authors of this manuscript. All relationships are considered compensated. Relationships are self-held unless noted. I = Immediate Family Member, Inst = My Institution. Relationships may not relate to the subject matter of this manuscript. For more information about ASCO's conflict of interest policy, please refer to www.asco.org/rwc or ascopubs.org/jco/site/ifc . No COIs from the authors.


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