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Author: william healy

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21. 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

22. 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

23. 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

24. 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

25. 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

26. 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

27. 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

28. 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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