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Author: william healy

Displaying records 11 to 20 of 28 records.
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11. Practical Challenges in Wireless Sensor Network Use in Buildings
Series: Technical Note (NIST TN)
Report Number: 1604
Published: 9/30/2008
Authors: William M Healy, Won Suk Jang
Abstract: 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 pr ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861630

12. Wireless Sensor Networks as Part of a Web-Based Building Environmental Monitoring System
Published: 8/1/2008
Authors: Won Suk Jang, William M Healy, Miroslaw J Skibniewski
Abstract: The presented research shows how advanced wireless sensor technology can be used by engineers to monitor conditions in and around buildings.  The objective is split into three different tasks.  First, wireless sensor hardware is programmed ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861495

13. Effect of Temperature Stratification Near Heating Elements on the Measured Energy Factors of Electric Water Heaters
Published: 6/2/2008
Author: William M Healy
Abstract: Two different models of 190 L (50 gallon) residential electric water heaters were tested to investigate problems that arise in determining their energy efficiencies due to the steep temperature gradient near the lower heating element. This gradient ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861655

14. In-Situ Measurement of the Moisture Content of Building Materials Using Ultra-Wideband Radio Waves
Published: 8/1/2006
Author: William M Healy
Abstract: A study was carried out to determine the feasibility of commercial, off-the-shelf, and potentially low-cost ultra-wideband radio hardware to serve as a measurement tool for the moisture content of materials making up a building envelope. The study i ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=861005

15. Remotely Accessed Photovoltaic Power Experiment
Published: 3/21/2006
Authors: W J Hutzel, William M Healy
Abstract: 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 analyzi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860946

16. Lessons Learned in Wireless Monitoring
Published: 10/2/2005
Author: William M Healy
Abstract: 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860959

17. Fabrication of a Guarded-Hot-Plate Apparatus for Use Over an Extended Temperature Range and in a Controlled Gas Atmosphere
Published: 6/29/2005
Authors: Robert R Zarr, Daniel Robert Flynn, John W Hettenhouser, Nolan J Brandenburg, William M Healy
Abstract: This paper describes the fabrication of a guarded-hot-plate apparatus suitable for determining the steady-state thermal transmission properties of insulation specimens from 90 K to 900 K in a controlled gas atmosphere from 10^u-5^ kPa to 105 kPa. Th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860976

18. High-Temperature Guarded Hot Plate Apparatus Optimal Locations of Circular Heaters
Published: 6/1/2005
Authors: Daniel Robert Flynn, William M Healy, Robert R Zarr
Abstract: 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 t ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=860987

19. 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

20. 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



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