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Search Publications by: William M. Healy (Fed)

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Displaying 76 - 100 of 110

Practical Challenges in Wireless Sensor Network Use in Buildings

September 30, 2008
Author(s)
William M. Healy, Won Suk Jang
While wireless sensor network technology has advanced in recent years, potential users of these systems in buildings still have concerns with their use. This report summarizes results of a literature survey and interactions with building industry

Remotely Accessed Photovoltaic Power Experiment

March 21, 2006
Author(s)
W J. Hutzel, William M. Healy
A solar energy experiment that estimates the number of photovoltaic panels needed to provide supplemental power for a typical residence is described. The project is unique because it uses freely available on-line resources for collecting and analyzing

Lessons Learned in Wireless Monitoring

October 2, 2005
Author(s)
William M. Healy
The emergence of wireless communications technology has led to an increasing interest in sensors that are free from wiring constraints that increase the cost of installation of a sensor network and create a confusing collection of wires in a building. In

High-Temperature Guarded Hot Plate Apparatus Control of Edge Heat Loss

June 1, 2005
Author(s)
Daniel R. Flynn, William M. Healy, Robert R. Zarr
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, separated by

High-Temperature Guarded Hot Plate Apparatus Optimal Locations of Circular Heaters

June 1, 2005
Author(s)
Daniel R. Flynn, William M. Healy, Robert R. Zarr
The National Bureau of Standards (now the National Institute of Standards and Technology (NIST)) pioneered the use of circular line-heat-sources in guarded hot plate (GHP) apparatus, the most common type of absolute apparatus for measurement of the thermal

Development of an Optical Fiber-Based Moisture Sensor for Building Envelopes

October 1, 2003
Author(s)
William M. Healy, S Luo, M Evans, A Sucheta, Y Liu
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 from its