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Displaying records 31 to 40 of 131 records.
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31. Johnson-noise thermometry based on a quantized-voltage noise source at NIST
Topic: Energy
Published: 9/11/2013
Authors: Alessio Pollarolo, Tae H. Jeong, Samuel Paul Benz, Paul David Dresselhaus, Horst Rogalla, Weston Leo Tew
Abstract: Johnson Noise Thermometry is an electronic approach to measuring temperature. For several years, NIST has been developing a switching-correlator-type Johnson-noise thermometer that uses a quantized voltage noise source as an accurate voltage referenc ...

32. Absolute spectral responsivity measurements of solar cells by a hybrid optical technique
Topic: Energy
Published: 7/15/2013
Authors: Behrang H Hamadani, John F Roller, Brian P Dougherty, Fiona Persaud, Howard W Yoon
Abstract: An irradiance mode, absolute differential spectral response measurement system for solar cells is presented. The system is based on combining the monochromator-based approach of determining the power mode spectral responsivity of cells with an LED-b ...

33. Flat Frequency Response in the Electronic Measurement of the Boltzmann Constant
Topic: Energy
Published: 6/1/2013
Authors: Jifeng Qu, Horst Rogalla, Yang Fu, Jianqiang Zhang, Alessio Pollarolo, Samuel Paul Benz
Abstract: A new quantum voltage calibrated Johnson noise thermometer (JNT) was developed at NIM to demonstrate the electrical approach that determines the Boltzmann constant k by comparing electrical and thermal noise power. A measurement with an integration p ...

34. Johnson Noise Thermometry Measurement of the Boltzmann Constant with a 200 Ohm Sense Resistor
Topic: Energy
Published: 6/1/2013
Authors: Alessio Pollarolo, Tae H. Jeong, Samuel Paul Benz, Horst Rogalla
Abstract: In 2010, NIST measured the Boltzmann constant k with an electronic technique that measured the Johnson noise of a 100 Ω resistor at the triple point of water (TPW) and used a voltage waveform synthesized with a quantized voltage noise source (QV ...

35. A focused super-continuum solar simulator for illuminated solar cell microscopy
Topic: Energy
Published: 5/12/2013
Author: Tasshi Dennis
Abstract: The design and application of a novel, focused solar simulator based on a high-power, super-continuum laser is described. We used the simulator to create micrometer-scale spatial maps of full-spectrum optical beam induced current (FS-OBIC) in sam ...

36. Towards Demand Response Measurement and Verification Standards
Topic: Energy
Published: 5/1/2013
Authors: David G Holmberg, David Hardin, Ed Koch
Abstract: The value and impact of demand response (DR) at grid-scale depends upon the widespread and active participation of a diverse customer base. The level of participation by customers is impacted by financial compensation and return-on-investment. The ro ...

37. Strategies to Achieve Net-Zero Energy Homes: A Framework for Future Guidelines Workshop Summary Report
Series: Special Publication (NIST SP)
Report Number: 1140
Topic: Energy
Published: 4/5/2013
Author: Nancy A McNabb
Abstract: The National Institute of Standards and Technology (NIST) Measurement Science Roadmap for Net-Zero Energy Buildings Workshop Report (NIST TN 1660 ‹ March 2010) identified a number of broad challenges to achieving NZE high-performance green buildi ...

38. An Apparatus for Concurrent Measurement of Thermoelectric Material Parameters
Topic: Energy
Published: 1/29/2013
Authors: Raymond L. (Ray) Kallaher, Cory Alexander Maximilian Latham, Fred Sharifi

39. Performance Improvement of a Roof Top Air-Conditioning Unit by Refrigerant Circuitry Optimization
Topic: Energy
Published: 1/26/2013
Authors: Sunil Lee, David A Yashar, Piotr A Domanski
Abstract: In this experiment-aided simulation study, we achieved the performance improvement of a Roof Top Unit (RTU) by optimizing an evaporator‰s refrigerant circuitry using evolutionary algorithms. The system used in this study was a 2-stage 7.5 Ton RTU wit ...

40. Advanced Distillation Curve Analysis of Marine Diesel Fuel
Topic: Energy
Published: 1/17/2013
Authors: Peter Y. Hsieh, Kathryn Rosemary Abel, Thomas J Bruno
Abstract: Ocean-going ships burn heavy fuel oil. The combustion of heavy fuel oil in marine diesel engines emits nitrogen oxides, sulfur oxides, and particulates into the air. Growing public concern over air quality has led to increased scrutiny of heavy fue ...

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