Search NASA⌕ Search

SEARCH · Search NASA

Results for “Lessons Learned”

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.

Quote a phrase for an exact phrase match. Source license links do not imply unrestricted reuse.

At least 397 records · Page 22
All sourcesNASA NTRSDOE OSTI
DOE OSTI2018

Lessons Learned from a Laser Injury Event - Limitations of Skill-Of-The-Craft

A technician at INL received 2nd degree burns to the middle and ring fingers of his left hand while performing a preventive maintenance (PM) procedure on a Class 4 industrial laser on August 30, 2011. The task required placement of a “target” in the beam path to verify mirror alignment. The technician, believing the laser was in a safe mode, reached into the beam pathway to place the target, saw a flash and immediately withdrew his hand. Three INL technicians were assigned to perform a 2000 hour run time PM on a laser. A pre-job briefing was held August 29, 2011 by the acting foreman and the technicians started the PM. They had completed 25 steps in Section I of the work order by the end of the day. The laser systems were placed under LO/TO and the internal optics were cleaned and/or replaced. The LO/TO was released and the next morning, August 30, 2011, the technicians prepared to take a diagnostic shot inside the internal optics. The laser was powered up at the HMI, and the person in charge (PIC) selected the “Mirror Alignment” program from the human machine interface (HMI) screen, enabled the pendent and pressed the “Cycle Start” button. The technicians believed the laser was in “simmer” mode at this point and that no beam was being generated out of the resonator. A beam was being generated in the “Mirror Alignment” program when the “Cycle Start” button was pressed. They decided to check the #4 aperture target and see if they were aligned at that location. One of the technicians reach to place the target at the end of the Z box and a “Flash” occurred. The technician immediately retracted his hand with the target. The PIC turned off the high voltage (HV) at the pendent. The foreman and supervisor were informed of the incident and the injured technician was escorted to an onsite medical facility. The nurse evaluated the injury and sent the technician to a physician for further evaluation. A physician examined the technician’s hand. The technician’s left middle and ring fingers received 2nd degree burns to both finger tips. A prescription burn ointment and bandage was applied. The employee was returned to work with no restrictions.

99 GENERAL AND MISCELLANEOUS↗
DOE OSTI2019

NREL's Managed WPT Experiences and Lessons Learned

This presentation introduced NREL's vision for demonstrating wireless power transfer (WPT) for electric vehicles; described the 25-kW WPT system used with NREL's shuttle; summarized testing of the in-vehicle WPT system; discussed monitoring and control of the wireless charging; described a WPTsim Tool for wireless charging design; and presented a case study design project using WPTsim.

30 DIRECT ENERGY CONVERSION↗
DOE OSTI2019

Multiple Benefits of Industrial Energy Efficiency – Lessons Learned and New Initiatives

Past research has shown that energy efficiency implementation in manufacturing can yield additional, quantifiable benefits in areas such as maintenance, production and environmental performance. However, these types of benefits don’t often get identified or estimated during energy efficiency assessments on industrial plants or systems. In addition, these types of benefits are often omitted from conventional performance metrics, leading to overly modest payback calculations and an imperfect understanding of the impact of energy efficiency in manufacturing. If the non-energy related or multiple benefits of energy efficiency measures were to be estimated with good certainty in industrial energy assessments, the true magnitude of energy efficiency measures could be understood, leading to better and more accurate return on investment estimates for energy efficiency projects. According to the IEA report “Capturing the Multiple Benefits of Energy Efficiency (2014),” the monetary value of non-energy benefits stemming from industrial energy efficiency implementation could be in the range of 40% to 50% of the value of energy savings per measure, which could lower energy-efficiency project paybacks by more than half. In order to integrate the potential multiple benefits of energy-efficiency investments in energy efficiency assessments, these benefits need to be identified and quantified during energy efficiency assessments. To help achieve this an effort is underway to develop a training platform to enable companies and individuals who perform energy assessments to include multiple benefits of energy efficiency in project evaluations. This platform will include tools to analyze energy-saving projects, training workshops, and communications techniques and materials to provide the knowledge base to effectively integrate multiple benefits in the investment evaluations of energy efficiency measures. By integrating multiple benefit analyses in the energy assessments and assessment reports it is expected that the business case for energy efficiency will be bolstered leading to greater implementation of energy efficiency projects in manufacturing. This paper will discuss previous research showing the multiple benefits of energy efficiency in manufacturing and the analytical and communications framework that will enable the integration of multiple benefits in energy efficiency assessments.

Lung, Bruce↗
DOE OSTI2019

Nonlinear Optics at UMER: Lessons Learned in Simulation

Design of accelerator lattices with nonlinear optics to suppress transverse resonances is a novel approach and may be crucial for enabling low-loss high-intensity beam transport. Large amplitude-dependent tune spreads, driven by nonlinear field inserts, damp resonant response to driving terms. This presentation will focus on simulations of the UMER lattice operated as a quasi-integrable system (1 invariant of transverse motion) with a single strong octupole insert. We will discuss the evolution of simulation models, including the observation of losses associated with the original operating point near a fourth-order resonance. Other operating points farther from this resonance are considered and shown to be more promising.

Ruisard, Kiersten↗
DOE OSTI2019

Pilot-Scale CFP Commissioning: Creative Problem Solving and Lessons Learned

We have commissioned a pilot-scale, ex-situ catalytic fast pyrolysis (CFP) reactor system in the Thermal and Catalytic Process Development Unit (TCPDU) at the National Renewable Energy Laboratory. The FCC-style CFP system, including a riser and continuous regeneration, was added to the existing half-ton-per-day biomass fast pyrolysis unit and was designed to run a zeolite-type catalyst. The system is unique due to its scale and catalyst flow control scheme. As the design of this system was informed by early data from a bench-scale reactor, several technical scale-up challenges had to be overcome. Additionally, physical constraints and the complexities of biomass vapors required and inspired creative solutions. This talk will discuss the specific challenges we found and addressed, including an oxygen deficiency in the regenerator and plugging in the exit streams. We explored several options for increasing oxygen availability and selected a cyclone-catalyst return design on the exit line so we could increase air flow through the regenerator. We found that hot gas filtration is essential in any exit streams containing water vapor and trace amounts of catalyst; any combination of catalyst and condensate quickly makes mud that plugs equipment and severely limits run time. Duplicate filters are also required to extend run time. Most of the equipment and solutions were designed and installed by our team of engineers and technicians, working closely together in an iterative process to design, install, operate, then redesign. Collaborations with other national laboratories with computational fluid dynamics expertise helped inform designs and identify creative solutions to these scale-up challenges. Ultimately, data from the reactor system will be used to validate a comprehensive kinetic model of CFP that can be used to better design and inform new systems at various scales.

09 BIOMASS FUELS↗