Download or read book Thermal Transmission Measurements of Insulation written by Ronald Phillip Tye and published by ASTM International. This book was released on 1978 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Calibrated Hot Box written by Mumaw, JR. and published by . This book was released on 1974 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: A large calibrated hot box apparatus, utilizing highly thermal resistant walls, has been constructed to permit fast and accurate thermal conductance measurements for large vertical sections. The test wall section, nominally 9 by 14 ft (2.7 by 4.2 m), is placed between two chambers maintained at different temperatures. The net heat flow through the test wall is the algebraic sum of the measured input electrical energy and the chamber wall heat transfer which is measured using a heat meter technique. With the use of high thermal resistance walls, the correction for chamber heat flow is generally less than 1 percent. Other data required for the final calculations are obtained using an automatic data monitoring and recording system. Data analysis and report preparation are performed using a computerized program written especially for the equipment.

Download or read book Flanking Loss Calibration for a Calibrated Hot Box written by AG. Lavine and published by . This book was released on 1983 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Calibrated hot boxes are used to measure heat flow through building envelope components such as walls. To determine the specimen heat flow, the energy input to the metering chamber must be corrected for extraneous losses. Originally, these extraneous losses were assumed to occur only through the chamber walls. Recent events in the technical community have demonstrated that significant heat flow also occurs between the metering chamber and the climatic chamber through the specimen frame. This heat flow is called flanking loss. Hot box calibrations must account for flanking loss in addition to chamber wall loss in order to achieve highly accurate results.

Download or read book Thermal Insulation Materials and Systems for Energy Conservation in the 80s written by Francis A. Govan and published by ASTM International. This book was released on 1983 with total page 916 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Design and Fabrication of a Calibrated Hot Box Apparatus written by SD. Gatland and published by . This book was released on 1997 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: A second generation research calibrated hot box was designed and constructed at the University of Massachusetts's Building Energy Research Laboratory. The hot box was built to meet the test methodologies specified in the American Society for Testing and Materials (ASTM) Standard Test Methods C 976 [1] for calibrated hot boxes and C 1199 [2] for fenestration system hot box test methods.

Download or read book Heat Transmission Measurements in Thermal Insulations written by R. P. Tye and published by ASTM International. This book was released on 1979-12 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Calibration of the NBS Calibrated Hot Box written by RR. Zarr and published by . This book was released on 1987 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of calibration tests were conducted in the laboratory in order to determine the overall experimental error and uncertainty for the NBS calibrated hot box. For these tests, 10 cm (4 in.) and 20 cm (8 in.) thick polystyrene wall specimens having independently measured thermal resistances were installed in a support frame and sandwiched between the metering and climatic chambers. The metering chamber was operated at a typical indoor condition for a residence, while the climatic chamber was operated at selected steady outdoor winter conditions. For each of the tests, an energy balance was performed on the metering chamber. The heat transfer that flanks the wall specimen and passes through the support frame was predicted using a finite-difference model. The other heat losses and gains for the energy balance were measured. The residual energy loss for the energy balance of the metering chamber represents the overall experimental error and uncertainty.

Download or read book Calibration Procedures for Hot Boxes written by S. Yuan and published by . This book was released on 2002 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complete calibration on any Guarded or Calibrated Hot Box is critical for improving the accuracy of U-factor measurements of fenestration products. Any heat transfer that does not occur directly through the test specimen should be determined from the results of detailed calibration experiments. In addition, appropriate test conditions should be verified using national laboratory traceable calibration standards. In this paper, complete sets of calibration procedures using the University of Massachusetts Research Calibrated Hot Box under both the ASTM and ISO test methods are presented. Both the ASTM and ISO procedures include calibrations of the metering chamber extraneous heat transfer and the test specimen flanking heat transfer. The metering chamber extraneous heat transfer includes the metering chamber wall heat transfer, an insulated surround panel flanking heat transfer and other heat losses such as those through gaskets, mechanical fasteners, and less obvious heat transfer paths through the metering chamber wall or surround panel edges. The calibration procedure was conducted under ASTM and ISO test conditions. The calibrated heat transfer rates were characterized by the resulting surface temperature difference of the surround panel and the metering chamber the chamber wall thermopile voltage. In addition, the ASTM calibration procedures included the surface heat transfer coefficients calibrated using a plastic-faced Calibration Transfer Standard (CTS), and the ISO calibration procedures included the total surface thermal resistance calibrated using two Calibration Panels (CP).

Download or read book Uncertainty Analysis of A Calibrated Hot Box written by S. Yuan and published by . This book was released on 2002 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: The accuracy of the thermal transmittance, or U-factor, of a fenestration system measured in a building assembly thermal test facility depends upon the test apparatus, test conditions, operating procedure, and the specimen properties. By conducting the uncertainty analysis of a specific thermal test facility, the measurement uncertainty can be identified and quantified. The estimation procedure for the uncertainty associated with the U-factor result for a test apparatus should be established and reported with the measurement of the U-factors of fenestration products. In a study on the University of Massachusetts Research Calibrated Hot Box, detailed analyses of the elemental uncertainties associated with the basic measurements and uncertainty propagation on U-factor results have been performed. In the analysis of uncertainty ropagation, the Root Sum Square (RSS) method was used extensively. The procedure for uncertainty analysis used for this test apparatus can be used in any ASTM C 1363 hot box thermal test facility including those also using ASTM C 1199 for fenestration U- factor measurements. Using the uncertainty analysis procedure described in detail in this paper, a plastic-faced Calibration Standard Transfer (CTS) is analyzed. The results show a reasonable uncertainty level for the U-factor measurement made using ASTM C 1199.The improvement of the U-factor uncertainty can be achieved by reducing the uncertainties associated with the test specimen flanking heat transfer and the metering chamber extraneous heat transfer in the hot box test apparatus.

Download or read book A Calibrated Hot Box Approach for Steady State Heat Transfer Measurements in Air Duct Systems written by TL. Lauvray and published by . This book was released on 1978 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: The paper describes a procedure for measurement of steady-state heat transfer through the walls of air duct systems under actual operating conditions and configuration. The procedure uses two independent measurement techniques. A calibrated hot box is the primary measurement technique and an airstream temperature-drop measurement provides a secondary technique.

Download or read book Design Considerations on Guarded and Calibrated Hot Box Apparatus written by F. De Ponte and published by . This book was released on 1987 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The precision and accuracy of guarded and calibrated hot box apparatus have seldom been evaluated, either during the design process or at the performance check stage. Even round robins can supply little information on errors if no theory of the apparatus is available. The purpose of this paper is to consider heat transfer in the apparatus, to supply some rough practical tips to aid in understanding the apparatus performance, even though much more has to be done to reach the same level of knowledge achieved for the guarded hot plate apparatus.

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:

Download or read book Insulation Materials Testing and Applications 2nd Volume written by Ronald S. Graves and published by ASTM International. This book was released on 1991 with total page 647 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers presented at the syposium of the same name held in Gatlinburg, Tennessee, October 1991, address issues connected with reflectives, radiant barriers, radiation control coatings; economics and energy impact; long-term thermal performance of foams; assessments and properties of foams; convection

Download or read book A Calibrated Guarded Hot Box Test Facility written by PW. Linehan and published by . This book was released on 1978 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: A hot-box test facility was fabricated by Wiss, Janney, Elstner and Associates for Jim Walter Research Corp. The equipment is capable of operating in either a calibrated or a guarded mode. When operating in the guarded hot-box mode, the equipment is in accordance with the ASTM Test for Thermal Conductance and Transmission of Built-Up Sections by Means of the Guarded Hot Box (C 236-66). When operating in the calibrated hot-box mode, the equipment is in accordance with the proposed ASTM Test for Thermal Performance of Building Assemblies by Means of a Calibrated Hot Box, which is presently being written by ASTM Subcommittee C16.30 and for which input has been provided from this facility. The basic design consists of a separate cold box, hot box, specimen frames, refrigeration unit, control and data-acquisition panel, and metered box. Both the hot and cold boxes are insulated with low-density polyurethane foam, with an overall minimum thickness of 30.5 cm (12 in.). The attitude of the test facility can be varied to provide upward, downward, or horizontal heat flow. Both the hot and cold boxes can provide variable air velocities parallel to the specimen face.

Download or read book Thermal Insulation written by Frank J. Powell and published by ASTM International. This book was released on 1987 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Insulation Materials Testing and Applications 3rd Volume written by Ronald S. Graves and published by ASTM International. This book was released on 1997 with total page 541 pages. Available in PDF, EPUB and Kindle. Book excerpt: ...Contains papers presented at the Third Symposium on Insulation Materials: Testing and Applications, held in Quebec City, Quebec, Canada, on 15-17 May 1997.

Download or read book Ruggedness Experiments for a Calibrated Hot Box Measuring Fenestration Systems Thermal Transmittance written by S. Yuan and published by . This book was released on 2003 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: For a specific test method, ruggedness experiments are used to determine experimental conditions that significantly influence the measurement results and to determine how closely these conditions must be controlled to reduce their influence. In this paper, the results of ruggedness experiments using hot box test methods (ASTM C 1199, C 1363, and ISO 12567-1) that are used for the thermal transmittance measurement of fenestration systems are presented. A general procedure of ruggedness evaluations was conducted on the University of Massachusetts Research Calibrated Hot Box. Using ASTM E 1169, a Plackett-Burman (P-B) design with eight experiments was used to investigate the effects of the seven most important experimental conditions. Two experimental conditions, the weather side and metering side fan speeds, were found to have the most significant effects on fenestration systems thermal transmittance measurement results.