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"BESS"
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A bitter truth
A battlefield nurse during World War I, Bess Crawford, returning to London for a well-earned Christmas leave, finds her holiday fraught with mystery and murder when she agrees to help a bruised and battered woman return to her small village in Sussex.
Book
The Strange Career of Porgy and Bess
Created by George Gershwin and DuBose Heyward and sung by generations of black performers,Porgy and Besshas been both embraced and reviled since its debut in 1935. In this comprehensive account, Ellen Noonan examines the opera's long history of invention and reinvention as a barometer of twentieth-century American expectations about race, culture, and the struggle for equality. In its surprising endurance lies a myriad of local, national, and international stories.For black performers and commentators,Porgy and Besswas a nexus for debates about cultural representation and racial uplift. White producers, critics, and even audiences spun revealing racial narratives around the show, initially in an attempt to demonstrate its authenticity and later to keep it from becoming discredited or irrelevant. Expertly weaving together the wide-ranging debates over the original novel,Porgy, and its adaptations on stage and film with a history of its intimate ties to Charleston,The Strange Career of Porgy and Bessuncovers the complexities behind one of our nation's most long-lived cultural touchstones.
eBook
An unwilling accomplice
\"World War I Battlefield nurse Bess Crawford's career is in jeopardy when a murder is committed on her watch, in this absorbing and atmospheric historical mystery from New York Times bestselling author Charles Todd. Home on leave, Bess Crawford is asked to accompany a wounded soldier confined to a wheelchair to Buckingham Palace, where he's to be decorated by the King. The next morning when Bess goes to collect Wilkins, he has vanished. Both the Army and the nursing service hold Bess negligent for losing the war hero, and there will be an inquiry. Then comes disturbing word from the Shropshire police, complicating the already difficult situation: Wilkins has been spotted, and he's killed a man. If Bess is to save her own reputation, she must find Wilkins and uncover the truth. But the elusive soldier has disappeared again and even the Shropshire police have lost him. Suddenly, the moral implications of what has happened--that a patient in her charge has committed murder--become more important to Bess than her own future. She's going to solve this mysterious puzzle, but righting an injustice and saving her honor may just cost Bess her life\" -- from publisher's web site.
Book
Frequency control of future power systems: reviewing and evaluating challenges and new control methods
Integration of more renewable energy resources introduces a challenge in frequency control of future power systems. This paper reviews and evaluates the possible challenges and the new control methods of frequency in future power systems. Different types of loads and distributed energy resources (DERs) are reviewed. A model representation of a population of the water heater devices for the demand side frequency response is considered. A model representation of a population of battery energy storage system (BESS)-based DERs such as smart electric vehicles (EVs) charging, large-scale BESSs, and residential and non-residential BESSs, are highlighted. The simplified Great Britain power system and the 14-machine South-East Australian power system were used to demonstrate the effectiveness of the new methods in controlling power system frequency following a disturbance. These new methods are effective in recovering the fallen frequency response and present a great potential in controlling the frequency in future power systems.
Journal Article
Investigating BESS Ageing from Operational Data on Electricity Markets: Estimating Performance, Capacity and Power Fade
In recent years, renewable energy production has expanded rapidly, becoming an essential component of the global energy transition. However, the inherent variability and unpredictability of renewable generation require technologies that can provide grid stability and operational flexibility. Battery Energy Storage Systems (BESS) play a central role in addressing this challenge, but their long-term effectiveness depends on a thorough understanding of their degradation mechanisms. This work aims to model and predict the capacity and power degradation of a real-world BESS operating in the electricity market, bridging the gap between laboratory-based ageing studies and field applications. Several degradation indicators, such as available capacity evolution, DC efficiency evolution, conductivity loss, and loss of lithium inventory, were evaluated to determine which models best describe the system’s ageing behaviour. Some estimations were found inaccurate and subsequently excluded, while the remaining analyses enabled a detailed characterisation of BESS performance over time. Using operational data collected between November 2022 and October 2024, results indicate a linear capacity degradation reaching 4.57% over 23 months (490 equivalent cycles), from approximately 9600 kWh to 9150 kWh, with a Mean Absolute Percentage Error (MAPE) of 0.2%. DC efficiency exhibited a two-phase evolution, with an initial rise followed by a slow reduction trend. These findings confirm that ageing effects can be effectively evaluated using operational data, enabling reliable lifetime forecasting for BESS assets.
Journal Article
A casualty of war
Caring for an unstable soldier who believes his distant cousin is responsible for his injuries, battlefield nurse Bess Crawford investigates the patient's claims, only to find herself in unexpected danger.
Book
An In-Depth Life Cycle Assessment (LCA) of Lithium-Ion Battery for Climate Impact Mitigation Strategies
Battery energy storage systems (BESS) are an essential component of renewable electricity infrastructure to resolve the intermittency in the availability of renewable resources. To keep the global temperature rise below 1.5 °C, renewable electricity and electrification of the majority of the sectors are a key proposition of the national and international policies and strategies. Thus, the role of BESS in achieving the climate impact mitigation target is significant. There is an unmet need for a detailed life cycle assessment (LCA) of BESS with lithium-ion batteries being the most promising one. This study conducts a rigorous and comprehensive LCA of lithium-ion batteries to demonstrate the life cycle environmental impact hotspots and ways to improve the hotspots for the sustainable development of BESS and thus, renewable electricity infrastructure. The whole system LCA of lithium-ion batteries shows a global warming potential (GWP) of 1.7, 6.7 and 8.1 kg CO2 eq kg−1 in change-oriented (consequential) and present with and without recycling credit consideration, scenarios. The GWP hotspot is the lithium-ion cathode, which is due to lithium hexafluorophosphate that is ultimately due to the resource-intensive production system of phosphorous, white, liquid. To compete against the fossil economy, the GWP of BESS must be curbed by 13 folds. To be comparable with renewable energy systems, hydroelectric, wind, biomass, geothermal and solar (4–76 g CO2 eq kWh−1), 300 folds reduction in the GWP of BESS will be necessary. The areas of improvement to lower the GWP of BESS are as follows: reducing scopes 2–3 emissions from fossil resource use in the material production processes by phosphorous recycling, increasing energy density, increasing lifespan by effective services, increasing recyclability and number of lives, waste resource acquisition for the battery components and deploying multi-faceted integrated roles of BESS. Achieving the above can be translated into an overall avoided GWP of up to 82% by 2040.
Journal Article
The shattered tree
\"From New York Times bestselling author Charles Todd comes another captivating mystery featuring WWI battlefield nurse Bess Crawford\"-- Provided by publisher.
Book
Energy management and operational control methods for grid battery energy storage systems
Energy storage is one of the key means for improving the flexibility, economy and security of power system. It is also important in promoting new energy consumption and the energy Internet. Therefore, energy storage is expected to support distributed power and the micro-grid, promote open sharing and flexible trading of energy production and consumption, and realize multi-functional coordination. In recent years, with the rapid development of the battery energy storage industry, its technology has shown the characteristics and trends for large-scale integration and distributed applications with multi-objective collaboration. As a grid-level application, energy management systems (EMS) of a battery energy storage system (BESS) were deployed in real time at utility control centers as an important component of power grid management. Based on the analysis of the development status of a BESS, this paper introduced application scenarios, such as reduction of power output fluctuations, agreement to the output plan at the renewable energy generation side, power grid frequency adjustment, power flow optimization at the power transmission side, and a distributed and mobile energy storage system at the power distribution side. The studies and application status of a BESS in recent years were reviewed. The energy management, operation control methods, and application scenes of large-scale BESSs were also examined in the study.
Journal Article