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Author: william healy

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21. High-Temperature Guarded Hot Plate Apparatus Control of Edge Heat Loss
Published: 6/1/2005
Authors: Daniel Robert Flynn, William M Healy, Robert R Zarr
Abstract: The guarded hot plate (GHP) apparatus is the most common type of absolute apparatus for measurement of the thermal transmission properties of thermal insulation. As the name implies, the hot meter plate is surrounded by a coplanar guard plate, separa ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861062

22. Detection of Moisture Accumulation in Wall Assemblies Using Ultra-Wideband Radio Signals.
Published: 12/5/2004
Authors: William M Healy, E Vandoorn
Abstract: This paper discusses the use of ultra-widehand radio signals near 5 GHz to detect moisture problems within building assemblies. Ultra-widehand signals are made up of a large spectrum of electromagnetic waves, and hardware is available to temporally r ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=101195

23. Detection of Moisture Accumulation in Wall Assemblies Using Ultra-Wideband Radio Signals
Published: 12/1/2004
Authors: William M Healy, E NMI van Doorn
Abstract: This paper discusses the use of ultra-wideband radio signals to detect moisture problems within building assemblies. Ultra-wideband signals are made up of a large spectrum of electromagnetic waves, and hardware is available to temporally resolve the ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861065

24. Development of an Optical Fiber-Based Moisture Sensor for Building Envelopes
Published: 10/1/2003
Authors: William M Healy, S Luo, M Evans, A Sucheta, Y Liu
Abstract: Optical fiber-based moisture sensors have been developed to help detect moisture problems in building envelopes. The sensors are created with a coating on a long period grating that is written onto optical fiber. As the coating absorbs moisture fro ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860890

25. Variability in Energy Factor Test Results for Residential Electric Water Heaters
Published: 10/1/2003
Authors: William M Healy, J D Lutz, A B Lekov
Abstract: Recent modifications to the minimum energy efficiency requirements for residential water heaters have spurred an investigation into the variability in testing high-efficiency electric water heaters. While initial inter-laboratory comparisons showed ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860888

26. Design Concepts for a New Guarded Hot Plate Apparatus for Use Over an Extended Temperature Range
Published: 10/1/2002
Authors: D R Flynn, Robert R Zarr, Mahn-Hee Hahn, William M Healy
Abstract: The National Institute of Standards and Technology is building a new guarded hot plate apparatus (GHP) for use at temperatures from 90 K to 900 K, with provision to conduct tests in various gases at controlled pressures from 0.013 Pa to 0.105 MPa ({a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860860

27. Thermal Modeling of Multiple-Line-Heat-Source Guarded Hot Plate Apparatus
Published: 10/1/2002
Authors: William M Healy, D R Flynn
Abstract: The National Institute of Standards and Technology is building an advanced-design guarded hot plate apparatus of advanced design to provide very accurate thermal transmission properties for specimens of thermal insulation 500 mm in diameter, with thi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860877

28. On the Validity of the Adiabatic Spreading Assumption in Droplet Impact Cooling
Published: 10/1/2001
Authors: William M Healy, J G Hartley, S I Abdel-Khalik
Abstract: The effect of heat transfer on the spreading of a water droplet impacting a heated surface has been numerically investigated. The aim is to assess the validity of commonly made assumptions in spray cooling models which ignore heat transfer during th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860820

29. Using Finite Element Analysis to Design a New Guarded Hot Plate Apparatusfor Measuring the Thermal Conductivity of Insulating Materials
Published: 10/1/2001
Author: William M Healy
Abstract: The National Institute of Standards and Technology (NIST) is developing aguarded hot plate apparatus to measure the thermal conductivity of thermal insulation over a temperature range from 90 K to 900 K. The apparatus will create one-dimensional hea ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860852

30. Surface Wetting Effects on the Spreading of Liquid Droplets Impacting a Solid Surface at Low Weber Numbers
Published: 12/1/2000
Authors: William M Healy, J G Hartley, S I Abdel-Khalik
Abstract: A modification to the Kurabayashi-Yang equation for predicting the maximum spreading ratio of a liquid droplet impacting a solid surface has been made to account for effects of the contact angle between the spreading liquid and the impact surface. A ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860814



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