Results 141 to 150 of about 1,553 (181)
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Estimation of argon activation in HFRR pool water and primary coolant system
Life Cycle Reliability and Safety Engineering, 2017Ar-41 being hard gamma emitter is one of the key radio-nuclide for operational and radiological safety during the normal operation of pool type research reactor. This paper discusses the estimation of Ar-41 activity in pool water and primary coolant system of 30 MW HFRR open pool type reactor.
M. K. Hansda +3 more
semanticscholar +3 more sources
Lubricity of ethanol–diesel blends – Study with the HFRR method
Fuel, 2017Abstract Due to increasing fuel consumption in various industries, especially in road transport, interest in increasing the market participation of renewable fuels is growing. One such fuel is ethanol. The raw materials for its production include sugar beets, sugar cane, potatoes and many other starch-containing plants.
H. Kuszewski, A. Jaworski, A. Ustrzycki
semanticscholar +2 more sources
Evaluation of Hydrous Ethanol Fuel Lubricity by HFRR
SAE Technical Paper Series, 2016<div class="section abstract"><div class="htmlview paragraph">Improvement of thermal efficiency is an important problem for internal combustion engines. Fuel reforming with dehydrogenation reaction by exhaust heat is one of the measures to increase thermal efficiency using hydrogen mixed SI combustion.
M. Oguma +3 more
semanticscholar +2 more sources
HFRR studies on methyl esters of nonedible vegetable oils
Energy & Fuels, 2006The article describes the systematic studies on the lubrication properties of biodiesel, low sulfur diesel fuel, and their blends. Biodiesel from nonedible oils ( e. g., Jatropha curcas, Pongamia glabra, Madhuca indica, and Salvadora oleoides) were prepared by base-catalyzed transesterification using methanol; high-speed diesel (HSD) used was from ...
A. K. Bhatnagar +3 more
semanticscholar +2 more sources
Methodology of Lubricity Evaluation for DME Fuel based on HFRR
SAE Technical Paper Series, 2011The methodology of lubricity evaluation for DME fuel was established by special modified HFRR (High-Frequency Reciprocating Rig) such as Multi-Pressure/Temperature HFRR (MPT-HFRR).
M. Oguma +3 more
semanticscholar +2 more sources
AFM Investigation of Steels Surfaces Worn in HFRR Tests
Materials Science Forum, 2007Radical reduction of sulphur content in diesel fuel from the mid 90’s had disastrous impact on diesel fuel’s lubricity. Due to the desulphurization process the lubricity of diesel fuel dropped significantly and got crucial nowadays. The lubricity performance of the diesel fuel is evaluated by the HFRR test in Europe.
D. Aranyi +3 more
semanticscholar +2 more sources
Improving the Precision of the HFRR Lubricity Test
SAE Technical Paper Series, 2006<div class="htmlview paragraph">Researchers and cooperative groups worldwide conducted research and developed several test methods to gauge the lubricity of diesel fuel. This was necessary because the more recent fuel specifications require a higher level of hydrotreating which in turn can result in a reduction of diesel fuel lubricity.
M. Nikanjam, J. Rutherford
semanticscholar +2 more sources
Evaluation of ball and disc wear scar data in the HFRR lubricity test
Lubrication Science, 2008AbstractThe high‐frequency reciprocating rig (HFRR) lubricity tester has become a widespread method for determining the lubricity of diesel fuels. The test is a ball‐on‐disc method, in which a steel ball scrapes over a steel disc immersed in the liquid to be tested. According to standards, the wear scar generated on the ball, in the form of the average
G. Knothe
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Pushing the Boundaries of the HFRR: Impact of Increased Test Severity on Wear
SAE Technical Paper Series, 2013<div class="section abstract"><div class="htmlview paragraph">The high frequency reciprocating rig (HFRR) was developed in the early 1990s as a test method to assess diesel fuel lubricity in order to provide wear protection for fuel injection pumps.
B. Hornby +3 more
semanticscholar +2 more sources
Determining the Sensitivity of Fuel Lubricity Additive Concentration on HFRR Test Parameters
Materials Performance and Characterization, 2018Abstract In diesel engines, fuel pumps and injectors are subjected to tremendous pressures that can reach upward of 200 MPa in modern systems. In order to generate and maintain this level of pressure, the internal pump and injector components are made to an exacting standard.
G. Hansen +3 more
semanticscholar +2 more sources