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Search results for: MODERATE REDUCED PRESSURE
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Improved model of isothermal and incompressible fluid flow in pipelines versus the Darcy–Weisbach equation and the issue of friction factor
PublicationIn this article, we consider the modelling of stationary incompressible and isothermal one-dimensional fluid flow through a long pipeline. The approximation of the average pressure in the developed model by the arithmetic mean of inlet and outlet pressures leads to the known empirical Darcy–Weisbach equation. Most importantly, we also present another improved approach that is more accurate because the average pressure is estimated...
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THERMODYNAMIC ANALYSIS OF A GENERATION IV SCWR NUCLEAR POWER PLANT CYCLE
PublicationThis article presents a flow and thermodynamic analysis of a Generation IV nuclear cycle. An SCWR (Supercritical water reactor) is a high temperature and high pressure reactor that uses water at a temperature above its thermodynamic critical point as the working fluid. The cycle used for the calculations consists of one interstage superheater and 7 regenerative heat exchangers. Division pressure was optimized in view of the cycle efficiency,...
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Fully scalable one-pot method for the production of phosphonic graphene derivatives
PublicationGraphene oxide was functionalized with simultaneous reduction to produce phosphonated reduced graphene oxide in a novel, fully scalable, one-pot method. The phosphonic derivative of graphene was obtained through the reaction of graphene oxide with phosphorus trichloride in water. The newly synthesized reduced graphene oxide derivative was fully characterized by using spectroscopic methods along with thermal analysis. The morphology...
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Initial Investigation of Wave Interactions During Simultaneous Valve Closures in Hydraulic Piping Systems
PublicationThe effects of interference of pressure waves in simple piping systems were studied. A freeware computer code Allievi developed at the University of Valencia was used to simulate dynamic waveforms in simple and complex networks. The tests were carried out according to three scenarios. No pressure increases significantly exceeding the Joukowsky pressure in simple cases were noticed. When the effects of the simultaneous closing of...
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Optimizing CO2 Purification in a Negative CO2 Emission Power Plant
PublicationIn the pursuit of mitigating CO2 emissions, this study investigates the optimisation of CO2 purification within a Negative CO2 Emission Power Plant using a spray ejector condenser (SEC) coupled with a separator. The approach involves direct-contact condensation of vapour, primarily composed of an inert gas (CO2), facilitated by a subcooled liquid spray. A comprehensive analysis is presented, employing a numerical model to simulate...
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Effect of Some Sulphur Additives on The Degradation of 9Cr-1Mo Steel After Its 10 Years Service in The CCR Platforming Unit
PublicationThe work shows the results of the tests of 9Cr-1Mo steel, which was for 10 years operated in the CCR platforming unit in Group Lotos SA in Gdańsk, and then in the laboratory was sulphidised during 166 h at a temperature of 600 °C. Sulphidation was performed in a mixture of H2-H2S gases at the vapour pressure of sulphur 4.1·10-14 atm, so the order of magnitude of vapour pressure was less than that of the dissociation pressure of...
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ONTARGET, TRANSCEND and PROFESS – Clarifying, confusing or misleading
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Angiotensin receptor blockers and endpoint protection
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Health economy of the metabolic syndrome pandemic
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Angiotensin receptor blockers and cancer – Relationship dismissed by VALUE data while waiting for EMA and FDA reports
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Revisiting the pre-hypertension debate: Increasing evidence for treatment – or not?
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Hypertension and coronary artery disease: Mechanistic insights and therapeutic challenges
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Angiotensin II receptor blocker combinations: From guidelines to clinical practice
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Antihypertensive therapy and cancer risks?
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A stunning day in hypertension research – Results of ONTARGET, ACCOMPLISH and HYVET
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Primary cardiovascular prevention by Mediterranean diet – The PREDIMED trial
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An appropriate SCORE to assess cardiovascular risk in hypertension?
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Reappraisal of European guidelines on hypertension management: a European Society of Hypertension Task Force document
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EDITORIALHypertension and cardiovascular disease: Is arterial stiffness the heart of the matter?
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Renal nerve ablation: Emerging role in therapeutics
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Angiotensin receptor - neprilysin inhibiton (ARNI) – A novel therapeutic concept for management of hypertension and heart failure
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Should we treat prehypertension?
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ESH statement on detection and punishment of abstract fraud and poster plagiarism
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Increased Urinary C-Peptide and Albumin Excretion in Juvenile Borderline Hypertensives
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Survey of patient and physician assessment of a compliance reminder device in the treatment of hypertension
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Smoking is associated with chronic sympathetic activation in hypertension
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Medical decision making in hypertension
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2013 ESH/ESC Guidelines for the management of arterial hypertension
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Documentation of endpoint prevention with combination therapy in hypertension is urgently needed
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2013 European Society of Hypertension/European Society of Cardiology Hypertension Guidelines
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SCORE model underestimates cardiovascular risk in hypertensive patients: Results of the Polish Hypertension Registry
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Awareness of hypertension guidelines in primary healthcare in Poland
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Beta‐blockers as sub‐optimal treatment for hypertension: Time for first‐line therapy revision?
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The question of whether diabetes and its cardiovascular risks can be prevented: A realistic DREAM?
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State of global health – hypertension burden and control
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Cardiovascular risks in HIV patients
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Impact of abdominal obesity on the frequency of hypertension and cardiovascular disease in Poland – Results from the IDEA study (International Day for the Evaluation of Abdominal Obesity)
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Hypertension and cardiovascular disease in women: Progress towards better understanding of gender‐specific differences?
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ASCOT – More than a horse race!
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The surge of Japanese studies supporting the use of angiotensin receptor blockers in hypertension
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Does GISSI-AF change the concept of using RAS inhibitors in the primary prevention of atrial fibrillation in hypertensive patients?
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The J-curve phenomenon revisited
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Hypertension research into the new millennium
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Characterization of insomnia in patients with essential hypertension
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Increased time varying heart rate and cardiovascular risk in hypertension – Benefit of selective I(f)channel inhibitor?
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Is smoking a causative factor of hypertension?
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Direct renin inhibitors in hypertension – Approaching the moment of truth
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An American TROPHY in the prevention of hypertension
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Daytime, home and office blood pressures in treated hypertensive patients according to accretion of cardiovascular risk
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Benefits of hypertension management in diabetes: An opportunity not to be missed
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