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Book An Automated High Temperature Guarded Hot Plate Apparatus for Measuring Apparent Thermal Conductivity of Insulations Between 300 and 750 K

Download or read book An Automated High Temperature Guarded Hot Plate Apparatus for Measuring Apparent Thermal Conductivity of Insulations Between 300 and 750 K written by JG. Hust and published by . This book was released on 1990 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: An automated guarded-hot-plate apparatus was designed and built to meet the requirements of ASTM standard test method C 177 for measuring the thermal transmission properties of thermal insulation. The apparatus is controlled by a scientific desktop computer. Measurements with this apparatus can be performed at temperatures from 300 to 750 K in environments of different gases at pressures ranging from atmospheric pressure to roughing-pump vacuum. A novel design for a thermocouple device is used; this device more accurately senses the average temperature over the surface of each heater plate. An improved algorithm for the control sequence provides more stable heater powers and specimen temperatures. Initially the algorithm brings the system rapidly to a temperature setpoint with minimal overshoot. It also permits highly sensitive control of the plate temperatures in later phases of the measurement sequence when thermal stability of the specimen boundaries is very important in measuring the thermal conductivity with high precision. Overall uncertainties of thermal conductivities at atmospheric pressure are 2% at 300 K and 3% at 750 K.

Book High Temperature Guarded Hot Plate Apparatus

Download or read book High Temperature Guarded Hot Plate Apparatus written by D. R. Flynn and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Thermal Conductivity 23

Download or read book Thermal Conductivity 23 written by Kenneth E. Wilkes and published by CRC Press. This book was released on 1996-09-13 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains keynote lectures and 54 technical papers, presented at the 23rd International Thermal Conductivity Conference, on various topics, including techniques, coatings and films, theory, composites, fluids, metals, ceramics, and organics, related to thermal conductivity.

Book A Guarded Hot plate Apparatus for the Measurement of Thermal Conductivity

Download or read book A Guarded Hot plate Apparatus for the Measurement of Thermal Conductivity written by HAROLD J. HODGE and published by . This book was released on 1962 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Guarded Hot Plate and Heat Flow Meter Methodology

Download or read book Guarded Hot Plate and Heat Flow Meter Methodology written by C. J. Shirtliffe and published by ASTM International. This book was released on 1985 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Compendium of Thermophysical Property Measurement Methods

Download or read book Compendium of Thermophysical Property Measurement Methods written by A. Cezairliyan and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 639 pages. Available in PDF, EPUB and Kindle. Book excerpt: Building on the extensive coverage of the first volume, Volume 2 focuses on the fundamentals of measurements and computational techniques that will aid researchers in the construction and use of measurement devices.

Book International Comparison of Guarded Hot Plate Apparatus Using National and Regional Reference Materials

Download or read book International Comparison of Guarded Hot Plate Apparatus Using National and Regional Reference Materials written by Robert R. Zarr and published by . This book was released on 2002 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of an international comparison of guarded-hot-plate apparatus, thermal conductivity measurements of four different thermal insulation materials are presented. The test program evaluates four national reference materials using a two-part experimental plan: five independent replicate measurements at fixed temperature (297.15 K) and single-point measurements from 280?K to 320 K. The analysis of the replicate data provides rankings for the primary factors ¡ laboratory and material ¡ based on descriptive statistics. The major finding of the replicate analysis reveals a laboratory-material interaction. In other words, there are changes in both location and variation in the data from material-to-material. Further analyses attempt to determine the sources (i.e., underlying causes) for the variability in the replicate data. Secondary laboratory factors are investigated both individually following a cause-and-effect chart, and collectively using correlation analysis and analysis of variance. The major finding of the multi-temperature (280 K to 320 K) data confirm the laboratory-material interaction finding of the fixed-temperature replicate data. The data reveal increasing scatter as the temperature departs from laboratory ambient conditions of 297.15 K.

Book International Comparison of Guarded Hot Plate Apparatus Using National and Regional Reference Materials Classic Reprint

Download or read book International Comparison of Guarded Hot Plate Apparatus Using National and Regional Reference Materials Classic Reprint written by Robert R. Zarr and published by Forgotten Books. This book was released on 2017-11-19 with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from International Comparison of Guarded Hot Plate Apparatus Using National and Regional Reference Materials Certified Values for Reference Materials Protocol 3 Test Method and Apparatus Operating Principle Equipment Uncertainty Components Control Stability 4 Material Characterization Bulk Density (source Laboratories) Thermal Conductivity (source Laboratories) 5 Analysis of Fixed Temperature K) Replicate Data Presentation of Laboratory Data Graphical Exploration of Laboratory Data Engineering Significance of Laboratory Data Detailed Investigation of Laboratory Location and Variation Laboratory and Material Rankings Comparison of Source and Recipient Laboratory Data 6 Assessment of Fixed Temperature K) Replicate Data Presentation of (secondary) Laboratory Factors Evaluation of Major Sources of Variation Procedure steady-state Conditions Specimen Conditioning Surface Temperature Measurement Technique Specimen Equipment Measurement Check of Protocol Execution Mean Temperature (tm) Temperature Difference (at) Thickness (l) About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Book Thermal Design of a Miniature Guarded Hot Plate Apparatus

Download or read book Thermal Design of a Miniature Guarded Hot Plate Apparatus written by DR. Flynn and published by . This book was released on 1997 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Under contract from the National Institute of Standards and Technology, we have developed a prototype design for a miniature guarded hot plate apparatus that can be used to determine the thermal resistance of very small specimens (1 to 3 cm square) of thermal insulation materials at temperatures from -40 °C to +100 °C, with the capability to carry out measurements in air, selected gases, or vacuum. The overall design approach for this apparatus has been published previously. In the present paper, we provide details concerning the thermal design of the apparatus, including discussions of heater designs to promote temperature uniformity of the hot plate, guard designs to control extraneous heat gains and losses, material selection for the components of the apparatus, and techniques for temperature measurements.

Book Insulation Materials Testing and Applications 4th Volume

Download or read book Insulation Materials Testing and Applications 4th Volume written by André O. Desjarlais and published by ASTM International. This book was released on 2002 with total page 413 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book An Improved Guarded Hot Plate Thermal Conductivity Apparatus with Automatic Controls

Download or read book An Improved Guarded Hot Plate Thermal Conductivity Apparatus with Automatic Controls written by Zeno Zabawsky and published by . This book was released on 1957 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper describes an 8-in. guarded hot plate apparatus constructed according to ASTM Standard C 177-45 but with a number of changes that increase the versatility of the apparatus and permit the securing of thermal conductivity values to ±1 per cent by automatic means.