EBookClubs

Read Books & Download eBooks Full Online

EBookClubs

Read Books & Download eBooks Full Online

Book Coolants at Elevated Temperatures

Download or read book Coolants at Elevated Temperatures written by Serge Lievens and published by . This book was released on 2008 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the years, new performance requirements and environmental regulations have driven engine manufacturers to design new engines. The new engine technologies have resulted in different operating conditions in cooling systems. In general, a trend towards higher coolant temperatures is observed, which is expected to have an implication on the coolant stability and corresponding lifetime. In heavy duty applications, this trend is even more pronounced as engines are running longer and under more severe conditions. In this paper, a selection of different current coolant technologies available in the market have been tested to obtain more information on the influence of the coolant additive package on the thermal stability of the most commonly used coolant base fluid, mono ethylene glycol (MEG). For this reason glycol oxidation products have been measured after subjecting the coolants to high temperature oxidative conditions. In addition the physical/chemical stability of the coolants and corrosion protection level of the additive packages have been evaluated.

Book Coolants at Elevated Temperatures

Download or read book Coolants at Elevated Temperatures written by S. Claeys and published by . This book was released on 2006 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the years, new performance requirements and environmental regulations have driven engine manufacturers to design new engines. The new engine technologies have resulted in different operating conditions in cooling systems. In general, a trend towards higher coolant temperatures is observed, which is expected to have an implication on the coolant stability and corresponding lifetime. In heavy duty applications, this trend is even more pronounced as engines are running longer and under more severe conditions. In this paper, a selection of different current coolant technologies available in the market have been tested to obtain more information on the influence of the coolant additive package on the thermal stability of the most commonly used coolant base fluid, mono ethylene glycol (MEG). For this reason glycol oxidation products have been measured after subjecting the coolants to high temperature oxidative conditions. In addition the physical/chemical stability of the coolants and corrosion protection level of the additive packages have been evaluated.

Book Organic Coolant Summary Report

Download or read book Organic Coolant Summary Report written by R. F. Makens and published by . This book was released on 1964 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Comparison of Bench Test Methods to Evaluate Heavy Duty Coolant Thermal Stability

Download or read book Comparison of Bench Test Methods to Evaluate Heavy Duty Coolant Thermal Stability written by R. Doug Hudgens and published by . This book was released on 2007 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The past 10 to 15 years have seen a dramatic change in heavy duty coolants and cooling system maintenance practices. Controversy exists about the relative merits of newer organic acid (OAT) coolants and more conventional products, especially in the area of thermal stability. Coolant life has been extended from two years/240 K miles to at least five years/600 K miles. It is not uncommon for the same charge of coolant to remain in the cooling system until engine rebuild. Further, there has been an equally significant increase in the coolant service intervals. Reinhibition of the coolant was once tied to the oil change interval at 15 to 25 K miles. Now this additive addition has been extended in many cases to one year/150 K miles to two years/300 K miles. • Along with these dramatic increases in coolant life and service interval, strategies to reduce exhaust emissions such as EGR have increased and will continue to increase coolant temperatures. Sorting out coolant stability issues in the field is both expensive and time consuming. Further, it is very difficult to control a field test so as to obtain reliable data. In this environment, a bench test method that can quickly simulate high temperature, severe field service conditions is of vital importance. This paper compares four bench test methods as far as their ability to sort out thermal stability issues based on results from five coolants representing different additive packages and glycol qualities.

Book Nuclear Safety

Download or read book Nuclear Safety written by and published by . This book was released on 1959 with total page 1328 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Science and Technology of Liquid Metal Coolants in Nuclear Engineering

Download or read book Science and Technology of Liquid Metal Coolants in Nuclear Engineering written by Thiagarajan Gnanasekaran and published by Woodhead Publishing. This book was released on 2022-08-26 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: Science and Technology of Liquid Metal Coolants in Nuclear Engineering is a comprehensive consolidation of the latest research and knowledge on liquid metal coolants. Over the last decades, various new technologies have been developed for the liquid metal coolants of fast breeder and fusion reactors and accelerator driven systems. Details of pumps and instrumentation used in these coolants and their operating principles are included to provide the reader with a well-rounded understanding of the topic and to guide on the operation of different liquid metal coolant systems. Methods for the safe handling and control of impurity levels in these coolants are clearly discussed, along with alkali metal fires and their management, including methods for safe disposal of sodium waste. Discusses the thermophysical and chemical properties of liquid metals described with their microscopic origin Includes methods for the safe handling of liquid metal coolants and their purification and management Discusses pumps and instrumentation principles and design

Book Development of a High Temperature Coolant for Advanced Diesel Engines

Download or read book Development of a High Temperature Coolant for Advanced Diesel Engines written by I. S. Rhee and published by . This book was released on 1984 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study sought to develop a high-temperature coolant for future advanced military diesel engines capable of operating at high temperatures (up to 150 C). The desirable coolant for high-temperature application must have a high boiling point, a low freezing point, good thermal properties (specific heat and thermal conductivity) and must be able to protect the various metals of the cooling system and the engine components against corrosion. In order to evaluate the candidate for high-temperature application under laboratory conditions, the simulated service corrosion test, ASTM D-2570 was conducted at 121 C for 1064 h. Also with this corrosion test mock-up, the cavitation-corrosion test was performed using an aluminum water pump at 121 C for 700 h. The antifreezes used in these tests were mixtures of MIL-A-46153 antifreeze and water containing 50, 60, and 80 wt percent ethylene glycol and similar mixtures containing the antifreeze extender additive, MIL-A-53009. Based on simulated service test results, the antifreeze mixtures containing 50, 60, and 80 wt percent ethylene glycol with antifreeze extender additive were found to be acceptable as potential candidates for the future advanced diesel engine operating at 121 C. Among the three candidate coolants, the antifreeze mixture containing 60 wt percent of MIL-A-46153 with antifreeze extender additive proved to be the optimum coolant for high-temperature application (121 C) based on its boiling point, freezing point, and thermal properties and on the results of the simulated service corrosion and cavitation-corrosion tests. Keywords: pH and reserve alkalinity.

Book Vapor Cycle Coolant Requirements for Nuclear Space Power Plants

Download or read book Vapor Cycle Coolant Requirements for Nuclear Space Power Plants written by Marion J. Janicke and published by . This book was released on 1964 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Liquid metals are especially suited for reactors with high thermal fluxes and high operating temperatures, because of their high thermal conductivities, low vapor pressures, and relatively high volumetric heat capacities. They are stable at high temperatures and in intense radiation fields. Mercury, rubidium, potassium, and sodium are coolants that vaporize at a temperature within the present state-of-the-art metallurgical limits.

Book The Chemically Controlled Cosmos

Download or read book The Chemically Controlled Cosmos written by T. W. Hartquist and published by Cambridge University Press. This book was released on 1995-12-07 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt: Simple chemistry governs a host of the exotic objects that populate our cosmos. For example, molecules in the early Universe acted as natural temperature regulators, keeping the primordial gas cool and, in turn, allowing galaxies and stars to form. What are the tools of the trade for the cosmic chemist and what can they teach us about the Universe we live in? These are the questions answered in this engaging and informative guide--the first book for nonspecialists on molecular astrophysics. In clear, nontechnical terms, and without formal mathematics, Hartquist and Williams show how to study and understand the behavior of molecules in a host of astronomical situations. Readers will learn about the secretive formation of stars deep within interstellar clouds; the origin of our own solar system; the cataclysmic deaths of many massive stars that explode as supernovae; and the hearts of active galactic nuclei, the most powerful objects in the universe. This book provides an accessible introduction to a wealth of astrophysics, and an understanding of how cosmic chemistry allows the investigation of many of the most exciting questions concerning astronomy today.

Book Coolant Performance at Higher Temperatures

Download or read book Coolant Performance at Higher Temperatures written by H. J. Hannigan and published by . This book was released on 1968 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Engine Coolant Technologies

Download or read book Engine Coolant Technologies written by William N. Matulewicz and published by ASTM International. This book was released on 2008 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume consists of 14 manuscripts from the Fifth International Symposium on Engine Coolant Technology sponsored by the American Society for Testing and Materials Committee D15 on Engine Coolants, held in Toronto, Canada, in May 2006. Papers cover advances in system components, experimental testing, uses, and users' experience of automotive and heavy-duty applications. They focus on international coolant development, field testing of additives, recycling, additive compatibility, alternate coolant base technology, extended life oxidation and thermal stability, and new testing methods of cavitation, erosion, and localized corrosion. Contributors are international technical representatives from OEM and engine coolant producers. There is no index.

Book Metal Coolant Thermal Interactions at High Temperatures

Download or read book Metal Coolant Thermal Interactions at High Temperatures written by S. J. Board and published by . This book was released on 1970 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: