The role of Organic Rankine Cycle technology in delivering efficiency improvements to energy processes

first_imgOrganic Rankine CycleSeveral technologies are being developed to aid this process, one of which is the Organic Rankine Cycle (ORC) system for power production from low to medium-temperature heat sources in the range of 90C to 350C, and even up to 550C for small power outputs.It is an evolution of the more commonly-known Rankine Cycle, a thermodynamic process of generating power from a heat source, via steam-powered turbine.As the name suggests, ORC systems use organic fluids in place of water to drive the process, and because of their lower boiling points and higher vapour pressure compared to water, lower-temperature heat sources can be used to generate electricity more efficiently.For businesses operating across those various energy and industrial sectors where heating processes are vital, this technology offers a range of efficiency benefits that could not only help reduce their emissions footprint, but also lower operational costs and increase flexibility.Italian firm Exergy is among the world’s leading proponents of this technology and, in the decade since it was founded in 2011, has developed an ORC fleet in operation or under delivery totalling almost 500 megawatts (MW).Its ORC products have been deployed around the world for use in power generation from biomass for applications of limited power size, from geothermal sources where heat-source temperatures are typically lower than fossil fuels, as well as for converting waste heat from industrial processes into electricity.Equally suitable applications for Exergy’s ORC technology include waste heat recovery from gas turbines in compression stations, oil refining activities or LNG processing, and it can be also applied to fleets of small- to medium-scale gas power stations.ORC turbines in Exergy’s workshop (Credit: Exergy) Being able to recover and utilise heat that would otherwise be wasted as exhaust discharge offers a considerable efficiency gain to energy and industrial businesses, allowing them to generate power from sources already available to them as a by-product of daily processes.The nature of ORC means efficiency improvements can be further maximised by making lower-temperature heat sources re-usable, while also eliminating the requirement for water and its associated treatment, as is necessary in traditional steam Rankine cycle applications, since there is no need to use water in the ORC process at all.Higher efficiency also translates into lower costs, since less energy needs to be purchased from the grid. And this lower power demand in turn has the benefit of reducing the overall carbon footprint of an operation by reducing the reliance on fossil fuels. Exergy’s Radial Outflow TurbineKey to Exergy’s innovation has been the development of a Radial Outflow Turbine as an alternative to traditional axial or radial inflow turbines.This technology, a world first in the ORC industry, operates with a higher efficiency compared to axial designs, and is customisable to customer-specific applications, allowing greater flexibility of installation.The radial configuration of the turbine also enables a broader range of applicable fluid conditions, as well as lower turbine speeds which in turn mean less noise and a longer life for the bearings inside.A simpler design allows quick installation, while maintenance, due to an easily-removable mechanical group, can be carried out in just few hours – so less operational downtime – without needing to overhaul the entire turbine system. Simplicity also translates into high reliability of the power plants.Industrial and heat-intensive energy processes will be the hardest sectors from which to eliminate emissions as the world targets carbon reduction over the coming decades.But progress can be made in the short-term by outfitting new and existing infrastructure with tools to make these processes more efficient in how they consume and manage energy.Technologies like ORC and Exergy’s Radial Outflow Turbine can contribute significantly by helping power producers, oil refiners, LNG processors and industrial manufacturers to lower their primary energy intensity, while also offering cost and flexibility benefits through more efficient energy usage. ORC specialist Exergy has developed technology that can help companies in oil and gas, power production, and heavy industry lower their carbon footprint while cutting costs through improved energy usage Efficient heating processes can have a short-term impact on emissionsEqually important to the low-carbon transition are technologies that can have a direct impact in the shorter term by improving the efficiency performance of existing energy-related infrastructure – whether in terms of refining, manufacturing, power production, or even buildings and transport.For example, around 15% of all energy-related greenhouse gas (GHG) emissions are produced by the oil and gas industry, from upstream processes through to downstream, so even small-scale efficiency improvements throughout these supply chains can translate into a big impact on global carbon reduction.One aspect of the efficiency discussion is the way heating processes used in activities like oil refining, petrochemical manufacturing or liquefied natural gas (LNG) processing can be reimagined, to maximise the potential use of the energy involved and ensure less wastage during these processes.This is equally applicable to activities like gas-fired power generation, or other sectors of heavy industry such as steel and cement making or chemicals manufacturing.Such applications have so far proved to be a “blind spot in the climate change debate”, the IEA has said, despite their potential to contribute to an estimated 40% reduction in global GHG emissions over the next 20 years.Global improvements in energy efficiency have been declining since 2015, and are currently “well below the level needed to achieve global climate and sustainability goals”, the agency says.Heat is the major source of CO2 emissions from heavy industry, and currently accounts for around two-thirds of industrial energy demand, and almost one-fifth of global energy consumption.It is clear that finding more efficient, less carbon-intensive ways to use heat and convert it into electricity in these sectors could make a considerable contribution to decarbonisation goals. (Credit: Exergy)  Decarbonising the global energy system will be a massive undertaking, requiring a broad range of new technologies, industries and processes to be developed.Much of the attention in this energy transition is given to “new-build” projects, like the increasingly-large wind and solar farms being installed worldwide, which will generate electricity on a commercial scale to feed growing demand over the coming decades.Progress in this area is advancing rapidly, with new records frequently being set for renewable capacity installations, and ambitious targets announced by governments and energy companies to scale up these fleets of turbines, solar panels, hydroelectric stations and others.But, despite all this progress, energy-related carbon emissions are likely to increase this year, having dropped in 2020 during the pandemic. The easing of lockdown restrictions and resumption of economic activity will drive a return to “carbon-intensive business-as-usual”, without a major turnaround in current trends, the International Energy Agency (IEA) recently warned.last_img read more

Turkish Navy to Take Over Fifth Vessel within LCT Project

first_img View post tag: Turkish Turkish Navy to Take Over Fifth Vessel within LCT Project Industry news The fifth vessel of Landing Craft Tank (LCT) project undertaken by ANADOLU Shipyard for the Turkish Navy, namely TCG Ç-155, will be delivered on June 1st 2012 Friday, Anadolu Shipyard announced on May 29.A small ceremony will be organized in the Shipyard for the delivery of TCG Ç-155.Landing Craft Tank (LCT) project consists of the acquisition of 8 ships through local design, construction and integration in order to meet operational requirements of the Turkish Naval Forces Command.The responsibility for design, construction, system integration, performance and timely delivery is shouldered by Anadolu Deniz İnşaat Kızakları (Anadolu Shipyard or ADİK).The primary functions of the vessels in question will be amphibious operations and troop transfer, followed by fast humanitarian and rescue aid to disaster areas.The 1,155 tonne ship stretches  72.95 m in length and belongs to a mono-hull type of vessels. It’s all steel construction is driven by 2 X MTU 16V4000 M70 diesel engines with the ability to develop 18.0 knots at full load displacement.This type of ship boasts of sea keeping maneuverability and stability requirements of the Turkish Naval Forces Command. The expected service life will be 30 years.[mappress]Naval Today Staff, May 30, 2012; Image: ANADOLU Shipyard May 30, 2012 View post tag: fifth View post tag: LCT View post tag: vessel View post tag: take View post tag: News by topic View post tag: over View post tag: Naval Back to overview,Home naval-today Turkish Navy to Take Over Fifth Vessel within LCT Project View post tag: project View post tag: Navy View post tag: within Share this articlelast_img read more

Meat Free Mondays – surely some misteak?

first_imgThree colleges have adopted the Meat Free Mondays concept, with New, Brasenose and Jesus all introducing the scheme in some form.The idea of the movement, started by Paul McCartney, is to highlight the impact that eating meat has on the environment in terms of the resources that farming meat takes up. New College, which passed its Meat FreeMonday’s motion on Sunday, now has a system where all students are classed as vegetarian on Mondays unless they choose to opt out.Jesus College is the only college that passed a motion to have a completely meat-free Monday. Ross Evans, JCR President commented, “Don’t get me wrong, there was still some opposition at the end, but reasoned discussionleft little doubt which option we should take – and in the end the JCR voted pretty conclusively.” However, the motion has often caused controversy in the colleges; Magdalen had its motion to introduce Meat Free Monday’s defeated by 13 votes to 9.Whilst the Meat Free Monday movement seems to have gained momentum it is clear students are never pleased when restrictions are placed on their choice of the most important college provision, food.last_img read more

Union angered by Hitler parody

first_imgA YouTube parody video entitled “Hitler finds out he didn’t make Union president” was taken down after several members of the Oxford Union whose names featured in subtitles of the video, including Union President Izzy Westbury, expressed that they were offended by it.The video showed a clip from the 2004 war film Downfall, which shows the final ten days of the Fuhrer’s life in a Berlin bunker. The changed subtitles depicted Hitler’s rage upon finding out he had lost the Union elections to Izzy Wesbury.The video did not seem to target any particular individual although it mentioned the names of several standing committee members and ex-officers. Though there is no suggestion that the character represented by Hitler is directly intended as an attack upon either of the losing candidates at least one Union officer reported that the video had caused offence within Union ranks. Dattani continued, “I would not like to speculate as to who it was made by, but I believe that the video is highly inappropriate, and hope that the creator realises this and removes it from Youtube.”Since then, the video has been taken off the website.Another Union insider confirmed that “Rajiv Speilberg” was a running joke amongst Union officers because “he may or may not have filmed a tribunal”An ex-officer told Cherwell it was funny that, “the Union is about freedom of speech, and there’s been a witch-hunt to stop this video.“I just think it is ironic that on the one hand they invite Nick Griffin, and on the other try to penalise some one who just released a video that is actually quite funny.”Ryan Kemp, a second year St Peter’s historian who watched the video commented ““I thought the Hitler video was fantastic. Satire is the best form of humour and I think it appears to a lot of people that the Union consumes its members lives and quite possibly their souls as well.“The video tapped into the cringy parasitic atmosphere effectively, and was popular as a result.”Despite the amusement the video brought to some viewers, one German student, Richard Pollack, who was on Secretary’s Committee last year suggested that the video caused racial offence to German students, telling Cherwell, “I find the video representative of a generally relaxed attitude towards Nazi jokes in Britain, at the receiving end of which, I have frequently found myself.“A potential housemate once voiced concerns about the gas bill going up, if he lived with me. While it may be due to my apparent lack of humour, I nevertheless fail to laugh at the implicit comparison of an accomplished Union officer with the twentieth century’s most atrocious mass murder.“I would be delighted if the debate around the video increased awareness of the fact that the substantial number of German students at this university is rather unamused by these offences, which occur on a daily basis.” “We would like to stress that the Union has no control over what members of the University or the general public say or write about the Union.“The Union is widely regarded as a bastion of free speech, and in this tradition we would not want to unduly control or stifle what people say, be it complimentary or critical.”The video was originally posted by a user named “rajivspielberg” which led many Union members to point the finger at Rajiv Dattani, a member of the Standing Committee.Dattani however, absolved himself of all responsibility in a statement to Cherwell on Monday 10 October.“I most certainly did not create this video. “I believe that most Oxford students would realise that the creator of this video would not be foolish enough to use their real name.“This is especially true of a member of the Oxford Union, given it contravenes with [Union rules] which would leave them liable for disciplinary action.”The rule contravened labels “violent conduct or other behaviour on the Society’s premises liable to distress, offend or intimidate other members” as misconduct.center_img The statement released by the Union stated that, “The Union deeply deplores racist slurs or tasteless personal attacks and even if the perpetrator perhaps thought it amusing, the Union absolutely does not.“As far as we know, and just as we would expect, no one on the Union committee had any input into this video. All committee members are aware of the high standards of behaviour required of them, and the rules by which they are bound.last_img read more


first_imgHIGH CRIMES AND MISDEMEANORSGavel Gamut By Jim RedwineIf you visit our country’s most hallowed military institution at West Point you will find America’s most infamous traitor, Benedict Arnold, is as reviled today as he was in 1780. Arnold had been one of General George Washington’s closet colleagues and was in command of Fort West Point when he plotted with British Major John André to surrender West Point to the British.André was caught and hanged but Arnold escaped to England where he joined the British Army as a general and then engaged in battles against America. Such treachery is not easily forgiven. When you enter the venerable old Cadet Chapel at West Point you will find there is no mention of Arnold; his name has been removed from where others are displayed with honor.If even now America has not forgotten what treason truly is you can imagine how the Framers of our Constitution felt when they wrote our Constitution only seven years after Arnold’s betrayal. When Article II, section 4 of the Constitution was drafted treason was the first reason given for impeachment:“The President, Vice-President, and all civil Officers of the United States shall be removed from office on impeachment for and conviction of treason, bribery or other high crimes and misdemeanors.”Article I, section 5 gives the House of Representatives the sole power of impeachment and Article I, section 3, subsection 6 gives the Senate the power to try the charge of impeachment with a conviction, and subsequent removal from office, requiring a two-thirds vote.We have had forty-five Presidents of which three have been impeached: Andrew Johnson (1865-1869); Richard Nixon (1969-1974); William Clinton (1993-2001); and now perhaps, Donald Trump (2017-?). Andrew Johnson and William Clinton were not convicted. Richard Nixon resigned. And Donald Trump’s situation is yet to be determined.I do not know the significance of why America went from George Washington (1789-1797) to 1973 with only one presidential impeachment then has had two, and perhaps three, since then. My speculation is the bar for impeachment has been lowered from the behavior of a Benedict Arnold to a standard based on personality. Have we transitioned from treason to Tricky Dicky, Slick Willy, and, perhaps, Dodgy Donnie? If so, the cautionary statements of then-Representative Gerald Ford and the Founding Father and main architect of the Constitution James Madison may be worth considering. “An impeachable offense is whatever a majority of the Members of the House of Representatives says it is” (Ford), and we should be aware “Maladministration” [or its kin] is, “so vague a term [as] will be equivalent to a tenure during pleasure of the Senate.” (Madison).A short-hand interpretation of these admonitions is that America should not allow itself to become a nation based on the fluctuating opinions of those in Congress but only upon a system of law as sought by those who crafted our Constitution.For more Gavel Gamut articles go to www.jamesmredwine.comOr “Like” us on Facebook at JPegRanchBooks&KnittingFacebookTwitterCopy LinkEmailSharelast_img read more

The problematic growth of AP testing

first_imgA new book co-edited by a Harvard researcher pulls together a wide range of research on the successes and limitations of the College Board’s Advanced Placement (AP) program.The studies, said Philip Sadler, the F.W. Wright Senior Lecturer in Astronomy at Harvard, fall far short of consensus on many areas.“AP classes give a lot to the top students, but pouring money into the program and trying to give every student an AP education is not efficient or effective,” says Sadler.As the AP program becomes increasingly widespread in America’s public high schools, the student demographics that it serves have shifted and rapidly expanded. More than 25 percent of public high school seniors graduating last May took at least one AP test.The elite students the program once catered to have been joined by hundreds of thousands of students who may be less prepared for the rigors of AP course work. That means that the number of test-takers who do poorly on AP exams is growing, and some critics have begun to question the effectiveness of the program.Now, in “AP: A Critical Examination of the Advanced Placement Program” (Harvard Education Press, 2010), researchers present the most comprehensive picture yet of who really benefits from the millions spent each year on AP programs across the country.Most of the studies presented in the book focus on AP mathematics and science courses. Sadler is quick to point out the difficulties of conducting research on the program.“We can’t run control groups in ‘placebo’ classes,” he said. “Even with the best statistical tools, there is a large gray area.”Even so, Sadler and his fellow researchers agree that the AP program has expanded to reach the point of diminishing returns. As more students are pushed to take the courses, the number of students enrolled in them without sufficient foundational knowledge increases. Unprepared students do not gain more from an AP course than they would from a standard course, and schools promoting the program often end up funding the unnecessary failure of students who are pushed to take courses for which they are not ready.Sadler stresses that the effectiveness of paying to bring the AP to new districts must be analyzed school by school. One study in the book looks at Philadelphia, where the city has spent millions of dollars bringing the program to all of its public schools. The students passing AP tests, while low-income, overwhelmingly attend schools that use selective admissions. Students of similar income who attend the city’s regional high schools have a failure rate of at least 41 percent.“We found that AP courses can give strong students excellent preparation for college courses, especially if they earn a 5 on the AP exam,” Sadler says. “However, AP course work does not magically bestow advantages on underprepared students who might be better served by a course not aimed at garnering college credit.”last_img read more

Wholly (and holy) organic

first_imgAt Harvard Divinity School (HDS), we talk a lot about gardens — the biblical fruits of Eden, the blissful states of Sukhavati, the verdant blessings of Al-Janna — and now we too have a pluralist plot of paradise: the HDS Community Garden.This space was converted from lawn to lushness three years ago, through a combined effort of HDS staff (the HDS Green Team) and students (members of the student group EcoDiv). Thanks to them, we now have a holy, wholly organic garden, with garlic already on the rise.It was here, halfway through the first season and my first semester, that I received my own baptism by soil, anointed by the dirt under my nails as I dug into the ground, pulling up pound after pound of the most beautiful golden potatoes I’d ever seen. It was love. Hours later, we roasted those potatoes for the community and I dug in once more: CHOMP!With that bite, the covenant was formed. The next season, spring to fall 2010, I took on some real responsibilities as one of two student garden managers. My green-thumbed partner was and is Grace Egbert (M.T.S. ’12). Along with Leslie MacPherson Artinian in the Office of Ministry Studies, we expanded the project, helping the garden to grow to nearly 1,000 square feet of sacred space (though isn’t all space such?). With a Student Sustainability Grant courtesy of the Office for Sustainability, we were able to add some serious infrastructure: tomato towers, cucumber trellises, raised beds, even a drip irrigation system to reduce water waste and create a sustainable, localized food system.I’ve learned a lot through my study of environmental ethics here at Harvard, but the garden has really been where the rubber meets the road, or more appropriately, the shovel meets the soil. Through a lived relationship with this community of plants, animals, and people, I’ve come to be me. I’ve learned to live in a world that is borderlands, transgressing the boundaries of human-nature dualism, dwelling in a community of life abundant. Is a comparison to the concept of Pure Land really out of the question here?My most important learning has been this: Nature is so much more than a pristine forest atop the mountain. In the garden that is the world, nature is something familiar — us yet not quite — something near enough to love yet other enough to welcome us back into a forgotten covenant. Try to rope it in, to pound it into rows, and the plants will remind you of what’s what. A bean plant reaches out to the cucumbers, joining tendrils and becoming friends. A group of greens stubbornly reseed themselves throughout the garden. Even the squirrels can set us straight, raiding the trash to plant a kernel of corn, our single ear that year. Too many tomatoes? No problem. Squirrels like them too.Like them, eating is our most basic connection to nature, wholly obfuscated by the modern industrialized food system. I believe growing gardens is one of the most radical acts in which we can engage. By re-entering a direct relationship with other forms of life, we can see rightly once more. We can say, with a single bite of a fresh tomato, still holding that earthy smell that comes after a summer’s rain, that this relationship matters — that pesticides, chemical additives, and plastic packaging can’t take this away, that nothing can.At HDS, we’ve been fortunate that the community has been open to building these relationships. Once people tasted the bounties of this space, the joy of communal work, the peace of respite, a rainbow of colors — heirloom tomatoes, eggplant, greens, carrots, squash blossoms — our garden has grown and grown. This bounty was shared at more than 20 School-wide events last year, including a harvest festival turned dance of gratitude around the garden.In the garden, we co-create with the sun and the rain and the earth, participating in the divine. I urge everyone to have their own baptism by soil, to form a covenant with the land, the people, animals, and plants already around them, to dig in, and to relate.I’m a gardener for life now, and I have Harvard to thank for that. CHOMP! If you’re an undergraduate or graduate student and have an essay to share about life at Harvard, please email your ideas to Jim Concannon, the Gazette’s news editor, at [email protected]last_img read more

Broadway Grosses Hit $1.27 Billion in 2013-14 Season

first_img This past season, which began May 27, 2013 and ended May 25, concluded with grosses up 11.4%, attendance up 5.6% and playing weeks up 4.6% on last year’s figures, which were impacted by Hurricane Sandy. View Comments Big name stars such as Denzel Washington, Daniel Craig and Neil Patrick Harris, along with popular titles including Aladdin and Les Miserables, helped Broadway do big business over the 2013–2014 season. Great White Way shows grossed $1.27 billion during the period and total attendances reached 12.21 million. All new and continuing productions ran a total of 1496 playing weeks.center_img 44 productions opened during the 2013-2014 season which included 16 musicals (12 new, four revivals), 25 plays (10 new, 14 revivals, one return engagement) and three specials.last_img read more

Emergency crews respond to house fire in Binghamton

first_img5:32 A.M. UPDATE: The police department says the Binghamton Fire Department also responded. BINGHAMTON (WBNG) — The Binghamton Police Department tells 12 News that the second floor of the residence was fully engulfed. They say there were no injuries and the cause is unknown. —– 12 News has a crew on the way to the scene.center_img The police department says they responded at approximately 2:50 a.m., and everyone was evacuated safely. This is a developing story, stay with 12 News for further updates. As of 3:00 a.m., dispatchers cannot confirm further details with 12 News. BINGHAMTON (WBNG)- Emergency crews are responding to a report of a house fire at 22 Rutherford Street in Binghamton.last_img read more