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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 145 records · Page 8
All sourcesNASA NTRSDOE OSTI
DOE OSTI2018

Securing your Site in Development and Beyond

Why wait until production deployment, or even staging and testing deployment to identify security vulnerabilities? Using tools like Burp Suite, you can find security vulnerabilities before they creep up on you. Prevent cross-site scripting attacks, and establish a firmer trust between your website and your client. Verify that Apache/Nginx have the correct SSL Ciphers set. We explore using these tools and more to validate proper Apache/Nginx configurations, and to be compliant with modern configuration standards as part of the development cycle. Your clients can use tools like https://securityheaders.io and https://ssllabs.com to get a graded report on your level of compliance with OWASP Secure Headers Project and SSLLabs recommendations. Likewise, you should always use the same sites to validate your configurations. Burp Suite will find common misconfigurations and will also perform more thorough security testing of your applications. In this session you will see examples of vulnerabilities that were detected early on, as well has how to integrate these practices into your daily workflow.

Akopov, Mikhail S.↗
DOE OSTI2018

Large-Scale Daylighting Analysis for Buildings, Products, and Policy

Daylighting in buildings has come under increased scorn in the wake of ubiquitous solid-state lighting (SSL), as installed lighting power densities in buildings have been reduced to the point where designers and owners question the benefits of properly-designed daylighting and electric lighting control. At the same time the very process of demonstrating well-executed daylighting to satisfy new building rating systems has become burdensome. This paper demonstrates the utility of illuminance as an input to simple, existing qualitative and quantitative metrics for daylighting performance in buildings, at scale. This assertion is supported by sensitivity analysis of a large-scale daylighting simulation dataset. Uses of this data for quantifying non-energy benefits (NEBs) of daylighting are also explored. We do not eschew the use of newer, more detailed daylight metrics in design, but we do encourage the use of simple daylight metrics for a broader range of new and retrofit building projects toward a net-zero future.

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATI↗
DOE OSTI2017

GATEWAY Demonstrations: Tuning Hospital Lighting: Evaluating Tunable LED Lighting at the Swedish Hospital Behavioral Health Unit in Seattle

The GATEWAY program evaluated a tunable LED lighting system installed in the new Swedish Medical Behavioral Health Unit in Seattle that incorporates color-tunable luminaires in common areas, and uses advanced controls for dimming and color tuning, with the goal of providing a better environment for staff and patients. The report reviews the design of the tunable lighting system, summarizes two sets of measurements, and discusses the circadian, energy, and commissioning implications as well as lessons learned from the project.

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATI↗
DOE OSTI2017

GATEWAY Report Brief: Evaluating Tunable LED Lighting in the Swedish Medical Behavioral Health Unit

Summary of a GATEWAY report evaluation of a tunable LED lighting system installed in the new Swedish Medical Behavioral Health Unit in Seattle that incorporates color-tunable luminaires in common areas, and uses advanced controls for dimming and color tuning, with the goal of providing a better environment for staff and patients. The report reviews the design of the tunable lighting system, summarizes two sets of measurements, and discusses the circadian, energy, and commissioning implications as well as lessons learned from the project.

59 BASIC BIOLOGICAL SCIENCES↗
DOE OSTI2017

GATEWAY Report: Tuning the Light in Classrooms: Evaluating Trial LED Lighting Systems in Three Classrooms at the Carrollton-Farmers Branch Independent School District in Carrollton, TX

The GATEWAY program evaluated a trial installation of tunable-white LED lighting systems in three classrooms in the Carrollton-Farmers Branch Independent School District in Carrollton, TX. The report provides valuable insights into the use of this technology in a real-world setting.

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATI↗
DOE OSTI2017

2015 U.S. Lighting Market Characterization

The latest version of the U.S. Lighting Market Characterization estimates the installed stock, energy use, and lumen production of all general-illumination lighting products operating in the U.S. in 2015. Latest update in an ongoing series of reports.

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATI↗
DOE OSTI2017

Connected Lighting System Interoperability Study Part 1: Application Programming Interfaces

First in a series of studies that focuses on interoperability as realized by the use of Application Programming Interfaces (APIs), explores the diversity of such interfaces in several connected lighting systems; characterizes the extent of interoperability that they provide; and illustrates challenges, limitations, and tradeoffs that were encountered during this exploration.

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATI↗
DOE OSTI2019

Connected Lighting Systems Efficiency Study - PoE Cable Energy Losses, Part 1 [Revised]

First report in a study of the efficiency of connected lighting systems. The report summarizes the results of an exploratory study investigating power losses in Ethernet cables used between PoE switches and luminaires in PoE connected lighting systems. Testing was conducted at the Pacific Northwest National Laboratory (PNNL) Connected Lighting Test Bed in September 2017. The results were analyzed to explore the impact of cable selection on PoE lighting system energy efficiency, as well as the effectiveness of guidelines recently introduced by the American National Standards Institute (ANSI) C137 Lighting Systems Committee.

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATI↗
DOE OSTI2018

Yuma Border Patrol Lighting Retrofit: Final LED System Performance Assessment of Trial and Full Installation

Along the Yuma Sector Border Patrol Area in Yuma, Arizona, the GATEWAY program conducted a trial evaluation in which the incumbent quartz metal halide area lighting was replaced with LED at three pole locations, and illuminance measurements were recorded initially and at 2500 hours, 5000 hours, 7000, and 11,000 hours of operation. Additionally, four second-generation LED luminaires installed as part of the full installation were evaluated initially and again after 4,000 hours of operation. While the initial energy, lighting quality, and maintenance benefits relative to the incumbent high-pressure sodium system were very satisfactory, the study raises important questions regarding the long-term performance of LED lighting systems in high-temperature environments.

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATI↗
DOE OSTI2018

Stress Testing of Organic Light- Emitting Diode Panels and Luminaires

This report builds on previous DOE efforts with OLED technology by updating information on a previously benchmarked OLED product (the Chalina luminaire from Acuity Brands) and provides new benchmarks on the performance of Brite 2 and Brite Amber OLED panels from OLEDWorks. During the tests described here, samples of these devices were subjected to continuous operation in stress tests at elevated ambient temperature environments of 35°C or 45°C. In addition, samples were also operated continuously at room temperature in a room temperature operational life test (RTOL). One goal of this study was to investigate whether these test conditions can accelerate failure of OLED panels, either through panel shorting or an open circuit in the panel. These stress tests are shown to provide meaningful acceleration of OLED failure modes, and an acceleration factor of 2.6 was calculated at 45°C for some test conditions. In addition, changes in the photometric properties of the emitted light (e.g., luminous flux and chromaticity maintenance) was also evaluated for insights into the long-term stability of these products compared to earlier generations. Because OLEDs are a lighting system, electrical testing was also performed on the panel-driver pairs to provide insights into the impact of the driver on long-term panel performance.

29 ENERGY PLANNING, POLICY, AND ECONOMY↗
DOE OSTI2018

Top Efficacy Performers: An Investigation into High-Achieving LED Luminaires

This report documents a DOE study that evaluated the performance of several LED lighting products with claimed efficacies near or exceeding 200 lm/W. The purpose: to validate the claimed efficacy, determine the features or characteristics the products had in common, and identify any performance tradeoffs in luminaires reaching this very high efficacy level. All of the products were industrial luminaires with CCTs of 5000K, and all but one had exposed LED emitters. Overall, photometric testing yielded values reasonably close to manufacturer’ claims, yet evaluations by knowledgeable observers highlighted some key considerations – such as the importance of visual comfort.

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATI↗
DOE OSTI2019

Printed Anodes and Internal Light Extraction Layers on Flexible Glass to Create Cost Effective and High Efficacy Bendable OLED Lighting Panels

In this project, OLEDWorks developed a high efficacy and cost-effective flexible OLED lighting system which could reduce the cost of OLED light by introducing a combination of printable and scalable scattering type internal light extraction (ILE) and transparent conductive silver nanowire technologies that are compatible with roll-to-roll (R2R) processing methods. High efficacy was achieved by co-optimization of the internal light extraction, silver nanowire and ITO anodes, and stacked white OLED structure to reduce unwanted absorption, increase the outcoupling efficiency, and lower the OLED voltage. At the end of Phase I of this project a power efficacy of 90 lm/W was demonstrated in a flexible OLED lighting device based on ultrathin bendable glass. Without much additional work, the milestone of 100 lm/W is certainly within reach, and with further work on light extraction and white OLED materials, we believe 120 lm/W or higher is achievable within the next few years.

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATI↗
DOE OSTI2018

Connected Lighting Systems Efficiency Study: PoE Cable Energy Losses, Part 2

This is the second report of an investigation into energy losses in Ethernet cables used between Power over Ethernet (PoE) switches and luminaires in PoE connected lighting systems. Testing for Part 2 of the study was conducted in DOE’s Connected Lighting Test Bed in July and August 2018 and was a continuation of Part 1 studies conducted there in September 2017.

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATI↗
DOE OSTI2019

Accelerated Stress Testing of Multi-Source LED Products: Round 2

The second report in a series that uses accelerated stress testing (AST) to provide insights into the long-term behavior of commercial products utilizing different types of mid-power LEDs (MP-LEDs) integrated into the same LED module. The first report in the series provides initial AST results from two commercial lamps intended for use in horticulture applications and one tunable-white LED module intended for use in educational and office lighting applications. The second report focuses on determining the mechanisms of optical change in the same products.

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATI↗
DOE OSTI2019

Measuring Light Exposure and its Effects on Sleep and Behavior in Care Center Residents [ACC Care Center - Sacramento, CA]

A study of tunable lighting at the ACC Care Center, a 99-bed nursing center in Sacramento, CA, with a large population of dementia patients. The study involved a partnership between experts in lighting design, environmental design, and light measurement; experts in measuring resident behavioral outcomes in nursing centers; and leaders from a nursing center with previously installed programmable, tunable LED lighting. The objective was to test a strategy for measuring and documenting light exposure for typical nursing-center residents, and to evaluate the data in terms of various metrics for human circadian responses over the course of a day. The study builds on a prior field evaluation of tunable lighting at the ACC Care Center.

, nursing↗
DOE OSTI2020

2019 Lighting R&D Opportunities

BTO’s Lighting R&D Opportunities is updated annually and covers foundational R&D needs for lighting technology and lighting application understanding that will result in maximum energy savings while also optimizing for building occupant well-being and productivity.

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATI↗