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Experiment Execution
Published in Marian (Editor-in-Chief) Muste, Dennis A. Lyn, David M. Admiraal, Robert Ettema, Vladimir Nikora, Marcelo H. Garcia, Experimental Hydraulics: Methods, Instrumentation, Data Processing and Management, 2017
Marian (Editor-in-Chief) Muste, Dennis A. Lyn, David M. Admiraal, Robert Ettema, Vladimir Nikora, Marcelo H. Garcia
Keeping a laboratory notebook is useful for recording daily activities, observations, and procedures. Annotating entries with dates can help decipher the exact sequence of events that occurred during an experiment long after details of the experiment have been forgotten. It is also beneficial to prepare standard summary sheets for important points before beginning an experiment. Subsequently, when the experiments are underway, data should be entered into a datasheet. These data often include information like temperature, flow settings, and names of data-acquisition files. As contemporary records often are electronic, records should always be backed-up. At times, informal records may have legal ramifications, as explained by Tavoularis (2005), who discusses the benefits of recording a variety of information on the experiments as they unfold to prevent ethical rule infringements such as intellectual property violation.
Safe Work Practices for Water, Wastewater, and Environmental Professionals
Published in Frank R. Spellman, Kathern Welsh, Safe Work Practices for Wastewater Treatment Plants, 2018
Frank R. Spellman, Kathern Welsh
Properly dispose of unlabeled or out-of-date chemicals. Never dispose of chemicals in common trash containers. When hazardous waste is to be disposed of, contact the laboratory supervisor to ensure that proper disposal procedures are followed.
Determination of Oxidizing Substances in the Atmosphere
Published in James P. Lodge, Methods of Air Sampling and Analysis, 2017
All-glass midget impingers graduated with 5 mL graduations should be used (see Figure 411:1). Impingers should be kept clean and dust free. Cleaning should be done with laboratory detergent followed by rinses with tap and distilled water.
Techno-economic comparative analysis of hybrid renewable energy systems with and without battery energy storage system
Published in International Journal of Green Energy, 2023
Meera Sharma, Parag Nijhawan, Amrita Sinha
The American National Renewable Energy Laboratory (NREL) developed the computer simulation program HOMER. The load profile page provides summary statistics for the data together with a graphic depiction of the load profile as shown above in Figure 1. On selecting a peak month for the residential load, in our case, it’s July, since it is considered as the hottest month in the selected region of study. A 24-hour load profile of daily consumption, is then generated which can be altered accordingly and can be represented month-wise as shown in Tables 1 and 2. Figures 2 and 3 illustrate the load figures for weekdays and weekends throughout the course of the year, which are developed using Tables 1 and 2.
Geometric characteristics of corrosion pits on high-strength steel wires in bridge cables under applied stress
Published in Structure and Infrastructure Engineering, 2021
Kun Fang, Shunlong Li, Zhicheng Chen, Hui Li
Because this study employed a non-contact opto-digital microscope for data acquisition, its application in non-destructive testing (NDT) is an important aspect. The loading conditions should be a concern as a factor when conducting corrosion degree evaluation based on NDT. In addition, this study is a basic work evaluating the service performance of corroded high-strength steel wires in stay cables. The study can also be applied to corrosion simulation based on laboratory tests or computer simulation. A drawback of the study is that it is inconvenient to conduct microscope scanning in practical engineering, particularly in-situ testing on a large-span cable-stayed bridge. In the future, research regarding an in-situ non-destructive data acquisition method in a long-span cable-stayed bridge should be completed.
A proposed single-stage single-phase full bridge boost inverter
Published in International Journal of Electronics, 2020
Osama M. Salem, Haitham Z. Azazi, Dina S. M. Osheba, Azza E. Lashine
A single-stage single-phase DC-AC boost inverter has been proposed, explained and analysed. It has many advantages over conventional boost inverter such as reduced cost, size, weight and high efficiency. A new logic-based control scheme for the proposed inverter topology has been designed and implemented using a laboratory model and the digital signal processor (Model DS1104). Various tested have been carried out by computer simulation and verified experimentally using the laboratory model. The simulation and experimental results show that the inverter produces output AC voltages higher than the input voltage using only four switches which eliminates the complexity presented in similar inverter circuits. Moreover, the system is subjected to an increase in load and a step change in reference voltage and the results are presented. These simulation and experimental results illustrate low harmonic distortion, high voltage regulation and good transient characteristics of the proposed inverter topology.