Microbiologically Influenced Corrosion of Condenser and Heat Exchanger Tubing

Author(s):  
Kenneth W. Horn

Damage from Microbiologically Influenced Corrosion in the United States has been estimated to cost in excess of $250 billion annually. The industries most affected include oil production, water distribution, and power generation. For this reason, Microbiologically Influenced Corrosion, commonly referred to as MIC, has been the subject of many papers. Since the majority of papers are written from the viewpoint of the microbiologist, it is the intent of this paper to explain MIC in the context of classical corrosion theory, with the ultimate goal being to provide the power plant engineer with guidance on heat exchanger tube materials and how to prevent MIC in heat exchanger tubing.

2021 ◽  
Vol 2125 (1) ◽  
pp. 012013
Author(s):  
Jun Wu ◽  
Zhaoli Zheng ◽  
Yong Li ◽  
Jie Pang ◽  
Zhiwu Ke ◽  
...  

Abstract Steam cooler is one of the most important mechanical equipment in thermal power generation system and nuclear power generation system. The steam cooler bears a huge temperature gradient load when the working conditions are switched. In order to analyze the thermal stress of steam cooler tube sheet with high temperature load under harsh working conditions, the thermal-structural coupling analysis model of steam cooler tube sheet is constructed with finite element method. The results show that the stress concentration exists at the position connection between heat exchanger tube and cylinder. The maximum stress is located at the outermost heat exchanger tube with the peak stress of 320MPa. The heat exchanger tube layout alone cause higher stress. This situation should be avoided in the design of heat exchanger tube sheet. Furthermore, the strength and safety of the steam cooler tube sheet are evaluated with the stress linearization method. The steam cooler tube sheet design meets the safety requirements of structural strength under high temperature load.


Author(s):  
Tony Smith

This chapter examines the United States' liberal democratic internationalism from George W. Bush to Barack Obama. It first considers the Bush administration's self-ordained mission to win the “global war on terrorism” by reconstructing the Middle East and Afghanistan before discussing the two time-honored notions of Wilsonianism espoused by Democrats to make sure that the United States remained the leader in world affairs: multilateralism and nation-building. It then explores the liberal agenda under Obama, whose first months in office seemed to herald a break with neoliberalism, and his apparent disinterest in the rhetoric of democratic peace theory, along with his discourse on the subject of an American “responsibility to protect” through the promotion of democracy abroad. The chapter also analyzes the Obama administration's economic globalization and concludes by comparing the liberal internationalism of Bush and Obama.


2019 ◽  
Vol 3 (11) ◽  
pp. 179
Author(s):  
Nazhan Hammoud Nassif Al Obeidi ◽  
Abdul Wahab Abdul Aziz Abu Khamra

The Gulf crisis 1990-1991 is one of the important historical events of the 1990s, which gave rise to the new world order by the sovereignty of the United States of America on this system. The Gulf crisis was an embodiment to clarify the features of this system. .     The crisis in the Gulf was an opportunity for the Moroccans to manage this complex event and to use it for the benefit of the Moroccan situation. Therefore, the bilateral position of the crisis came out as a rejection, a contradiction and a supporter of political and economic dimensions at the external and internal levels. On the Moroccan situation, and from these points came the choice of the subject of the study (the dimensions of the Moroccan position from the Gulf crisis 1990-1991), which shows the ingenuity of Moroccans in managing an external crisis and benefiting from it internally.


1991 ◽  
Vol 30 (2) ◽  
pp. 213-217
Author(s):  
Mir Annice Mahmood

Foreign aid has been the subject of much examination and research ever since it entered the economic armamentarium approximately 45 years ago. This was the time when the Second World War had successfully ended for the Allies in the defeat of Germany and Japan. However, a new enemy, the Soviet Union, had materialized at the end of the conflict. To counter the threat from the East, the United States undertook the implementation of the Marshal Plan, which was extremely successful in rebuilding and revitalizing a shattered Western Europe. Aid had made its impact. The book under review is by three well-known economists and is the outcome of a study sponsored by the Department of State and the United States Agency for International Development. The major objective of this study was to evaluate the impact of assistance, i.e., aid, on economic development. This evaluation however, was to be based on the existing literature on the subject. The book has five major parts: Part One deals with development thought and development assistance; Part Two looks at the relationship between donors and recipients; Part Three evaluates the use of aid by sector; Part Four presents country case-studies; and Part Five synthesizes the lessons from development assistance. Part One of the book is very informative in that it summarises very concisely the theoretical underpinnings of the aid process. In the beginning, aid was thought to be the answer to underdevelopment which could be achieved by a transfer of capital from the rich to the poor. This approach, however, did not succeed as it was simplistic. Capital transfers were not sufficient in themselves to bring about development, as research in this area came to reveal. The development process is a complicated one, with inputs from all sectors of the economy. Thus, it came to be recognized that factors such as low literacy rates, poor health facilities, and lack of social infrastructure are also responsible for economic backwardness. Part One of the book, therefore, sums up appropriately the various trends in development thought. This is important because the book deals primarily with the issue of the effectiveness of aid as a catalyst to further economic development.


2019 ◽  
Vol 54 (1) ◽  
pp. 63-71
Author(s):  
V.E. Yurin ◽  
◽  
A.B. Moskalenko ◽  
M.A. Murtazov ◽  
◽  
...  

1994 ◽  
Vol 11 (1) ◽  
pp. 38-70
Author(s):  
Florence Eid

IntroductionThis paper is a report on the state of research in two areas of Islamicstudies: Islam and economics and Islam and governance. I researched andwrote it as part of my internship at the Ford Foundation during the summerof 1992. On Discourse. The study of Islam in the United States has moved far beyondthe traditional historical and philological methods. This is perhapsbest explained by the development of analytically rigorous social sciencemethods that have contributed to a better balance between the humanisticconcerns of the more traditional approaches and efforts at systematizingthe study of Islam and classifying it across boundaries of communities,religions, even epochs. This is said to have s t a d with the developmentof irenic attitudes towards Islam, which changed the direction of westemorientalist writings from indifference (at best) and often open hostility toand contempt of Islamic values (however they were understood) to phenomenologicalworks by scholars who saw the study of Islam as somethingto be taken seriously and for its own sake, which is best exemplifiedby Clifford Geertz's Islam Observed.The work of Edward Said contested this evolution, and the publicationof his Orientalism has been described as "a stick of dynamite"' that,despite its impact in mobilizing a reevaluation of the field, was unwarrantedin its pessimism. In any case, the field has continued to evolve,with the most powerful force moving it being the subject itself. Thephenomenological/orientalist approach, if we can point to one today, ...


Comic book studies has developed as a solid academic discipline, becoming an increasingly vibrant and field in the United States and globally. A growing number of dissertations, monographs, and edited books publish every year on the subject, while world comics represent the fastest-growing sector of publishing. The Oxford Handbook of Comic Book Studies examines the history and evolution of the visual narrative genre from a global perspective, bringing together readable, jargon-free essays written by established and emerging scholars from diverse geographic, institutional, gender, and national backgrounds. In particular, the Handbook explores how the term “global comics” has been defined, as well the major movements and trends that drive the field. Each essay will help readers understand comic books as a storytelling form grown within specific communities, and will also show how these forms exist within what can be considered a world system of comics.


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