An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Heat Transfer and Alternative Energy Systems Group
Mission: To promote innovation and competitiveness in the alternative energy and energy efficiency sector by advancing measurement science, standards, and technology related to energy utilization in buildings.
In grade school, Alshae’ Logan hadn’t seen or heard of a Black woman earning a doctoral degree, nor had she been taught of the contributions Black women made to
Any time you turn on a light at home or in the office, you are expending energy. But what if flipping the light switch meant producing energy too? We usually
We don’t use water like we used to. In recent decades, concerns about cost, water shortages and environmental impacts together with changes in plumbing design
Feeling hot, hot, hot … but this thermal insulation standard reference material (SRM 1450e) can help you take the heat, both in an apartment building and in
A Net-Zero Energy Residential Test Facility (NZERTF) has been constructed and extensively instrumented. The facility incorporates a high-performance envelope, a
The use of thermal insulation is a primary approach to reducing heating and cooling loads in buildings, which account for 42 % and 24 % of energy consumption in
Renewable energy generation is required to achieve net-zero energy buildings. Solar photovoltaic (PV) arrays typically offer the best means for providing this
According to the most recent national census data, the median year in which owner-occupied homes were built in the U.S. is 19761. Furthermore, housing starts
Hyperspectral luminescence imaging adds high-resolution spectral data to the electroluminescence and photoluminescence images of photovoltaic materials and
Behrang Hamadani, Margaret Stevens, Brianna Conrad, Matthew Lumb, Eric Armour, Kenneth Schmieder
A novel hyperspectral imaging instrument with dual electroluminescence and photoluminescence capability was used to image and analyze localized radiative
Behrang Hamadani, Margaret Stevens, Brianna Conrad, Matthew Lumb, Kenneth Schmieder
We have used a calibrated, wide-field hyperspectral imaging instrument to obtain absolute spectrally and spatially resolved photoluminescence images in high
Organic materials are uniquely suited for indoor light energy harvesting because they absorb mostly in the visible spectrum and the absence of ultraviolet light
CALCULATION OF ANNUAL FUEL UTILIZATION EFFICIENCY OF RESIDENTIAL CENTRAL FURNACES AND BOILERSThe AFUEBF program available at this website can be used to
The Pyranometer Responsivity INTERpolator (PRINTER) interpolates pyranometer incidence angle dependent calibration factors, or responsivities (µV/W/m2), into an
For innovative and cutting-edge research in the measurement of photovoltaic materials, dedicated leadership in developing standards, and outstanding mentorship.
For sustained superior group performance pursuing procurement and construction of a 15-acre, 5-megawatt, solar array system for the NIST Gaithersburg campus.