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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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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 ...

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