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Displaying 276 - 300 of 1084

Retro-Commissioning a Performing Arts Center using HVAC-Cx

February 21, 2019
Author(s)
Natascha S. Milesi-Ferretti, Michael A. Galler, Steven T. Bushby, Robert Leader, J. M. Whitcomb, David W. Rush
This paper presents the use of a semi-automated commissioning tool for the energy retro-commissioning of the Performing Arts Center at Montgomery College in Rockville, Maryland. Researchers and field practitioners collaborated to implement the HVAC-Cx

Structural, chemical, electrical and thermal properties of n-type NbFeSb

January 26, 2019
Author(s)
Dean Hobbis, Raphael P. Hermann, Hsin Wang, David S. Parker, Tribhuwan Pandey, Joshua B. Martin, Katharine L. Page, George S. Nolas
We report on the structural, chemical, electrical and thermal properties of n-type polycrystalline NbFeSb synthesized by induction melting of the elements. Although several studies on p-type conduction of this half-Heusler composition have recently been

Nonlinear Response of Silicon Solar Cells

January 1, 2019
Author(s)
Behrang H. Hamadani, Andrew M. Shore, Howard W. Yoon, Mark Campanelli
We used an LED-array-based combinatorial flux addition method to explore the wavelength and the intensity-dependence of the spectral responsivity in silicon solar cells. Many types of silicon cells, whether mono- or multi-crystalline type, exhibit notable

Thermal Pulse for Rapid Surface Processing of Solid-State Electrolytes

November 10, 2018
Author(s)
Chengwei Wang, Hua Xie, Weiwei Ping, Jiaqi Dai, Jamie Weaver, Guolin Feng, Yonggang Yao, Shuaiming He, Howard Wang, Karen Gaskell, Liangbing Hu
Surface contamination and degradation are two main issues leading to performance decay of ceramic-based solid-state electrolytes (SSEs). The typical strategies used to clean surface contaminants and restore ceramic materials involve mechanical polishing or

Modulated Photocurrent Measurements in Double Junction Solar Cells

November 4, 2018
Author(s)
Nicolas Marquez Peraca, Behrang Hamadani
Frequency dependent external quantum efficiency (EQE) measurements were performed on double junction solar cells by a custom-designed system consisting of an array of various monochromatic LEDs. Some LEDs were pulsed as a function of frequency while others

Control of thermal expansion in a low-density framework modification of silicon

September 30, 2018
Author(s)
Beekman Mathew, James A. Kaduk, Winnie Wong-Ng, George S. Nolas
The low-density clathrate-II modification of silicon, Si136, contains two distinct cage-like voids large enough to accommodate various types of guest atoms which influence both the host structure and its properties. Although the linear coefficient of

Initiation of flash boiling of multicomponent miscible mixtures with application to transportation fuels and their surrogates

August 16, 2018
Author(s)
Charles T. Avedisian, Kyle Skyllingstad1, Richard E. Cavicchi, Corinne Lippe, Michael J. Carrier
This paper presents methodologies to predict thermodynamic conditions that initiate flash boiling by spontaneous nucleation of liquids consisting of hundreds of miscible liquids and their lower order surrogate mixtures. The methods are illustrated with a
Displaying 276 - 300 of 1084