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Earlier sources: Energy
Energy research and engineering concern how power is produced, stored, delivered, and consumed. Follow solar and nuclear power, fusion, geothermal systems, batteries, electricity grids, and changing power demand.
SYMTRI organizes observations from public sources into a living map. Connections reflect shared subject matter; they do not establish causation or endorse a source.
Open in the map ↗714 classified signals in the fourteen-day window. Recent momentum: steady. These counts include signals awaiting readable evidence.
Earlier sources
Up to ten sources with readable evidence, ordered by their feed timestamp. These archive sources can be older than the live fourteen-day window. This list is a sample, not a measure of total activity. Dates distinguish paper publication, repository creation, model/dataset activity, Hacker News posts, and KEV catalog additions. “First archived” records when SYMTRI first stored the signal.
- OpenAlex · Published · First archived
Machine learning-based energy management and bidirectional power control for battery-fed electric vehicle traction drive ↗
Abstract Efficient energy management in a battery-fed electric vehicle (EV) traction system requires coordinated control of propulsion power, battery operating conditions, Direct Current (DC)-link voltage, and regenerative braking under rapidly changing driving conditions. This study develops a machine learning (ML)-based energy-management and bidirectional power-control framework integrating a lithium-ion battery, bidirectional direct current–direct current (DC–DC) converter, DC link, inverter-fed Permanent Magnet Synchronous Motor (PMSM), battery-state estimation, and regenerative-braking co…
- OpenAlex · Published · First archived
Recent Advances in Radiative Cooling Architectural Coatings: From Optical Principles to Building Energy Savings ↗
Radiative cooling architectural coatings reject solar gains while emitting terrestrial heat toward the cold sky, offering a passive route to reduce envelope heat gain and mechanical cooling demand. Its central argument is that high solar-weighted reflectance and long-wave emittance create opportunity but do not, in themselves, establish building value. Climate, sky view, insulation, thermal mass, HVAC operation, weathering, maintenance, and service life ultimately decide whether a surface-temperature benefit translates into a measurable reduction in peak load or annual energy. Accordingly, thi…
- OpenAlex · Published · First archived
Load-matched multi-evaporating pressure control in multi-split heat pumps for improving energy efficiency and thermal comfort ↗
Multi-split heat pumps (MSHPs) are powerful tools for achieving carbon neutrality in the building sector. However, all the indoor units (IDUs) in MSHPs have the same evaporating pressure, causing overcooling and frequent on-off operations under varying loads. Thus, multi-evaporating pressure (MEP) control is essential for obtaining a matched capacity for each IDU with the zone load, thereby achieving high energy efficiency and thermal comfort. This study proposes a flow control valve (FCV)-based MEP system and quantitatively evaluates its performance advantages over conventional single-evapora…
- OpenAlex · Published · First archived
Enhanced Thermal Electromotive Force in Lithiated CoPBA/NiPBA Tertiary Battery ↗
Tertiary batteries (TBs), or thermo-rechargeable batteries, have attracted attention as an energy harvesting technology that utilizes changes in ambient temperature. Prussian blue analogues (A-MPBAs; AxM[Fe(CN)6]y, where A and M are Li+ or Na+ ions and a transition metal, respectively) are typical active materials for TBs. In this study, we investigated the lithiation effect on the temperature (α) and capacity (β) coefficients of redox potential E, which governs the thermal electromotive force (VTB) and discharge capacity (QTB) of TBs. We fabricated lithiated and non-lithiated TBs composed of…
- OpenAlex · Published · First archived
Latent versus sensible thermal storage for load-shifting energy management in medium-deep U-type geothermal heat pump systems: A comparative performance analysis ↗
Thermal energy storage can enhance load shifting and extend heat-pump shutdown periods in medium-deep U-type borehole heat exchanger (MDUBHE) heating systems. However, latent and sensible thermal energy storage are commonly evaluated separately, and their differences in heat-supply capability, operating performance, and storage-volume requirements under unified conditions remain unclear. In this study, PCM-based latent storage and water-tank-based sensible storage were integrated with an MDUBHE heat-pump system and compared using consistent boundary conditions and control strategies. Seven PCM…
- OpenAlex · Published · First archived
Estimation of the energy of interfering signals in a code division multiple access system based on unequal-energy complex signals for users susceptible to dominance by other users' signals ↗
In a code-division multiple access system, when a user’s signal is received, the signals from the other users are treated as interfering signals and produce multiple-access interference. For unequal-energy complex signal ensembles, a nonuniform signal-energy distribution causes the total energy of interfering signals to differ among users and gives rise to the signal-dominance effect. This study aims to obtain an estimate of the energy of interfering signals for users susceptible to signal dominance from other users, to be used as a pessimistic estimate for the ensemble as a whole. To reduce t…
- OpenAlex · Published · First archived
Joint planning–control optimization of EV charging stations, battery energy storage, and DSTATCOMs in distribution networks ↗
Abstract The increasing penetration of electric vehicles (EVs) is placing growing planning and operational demands on distribution networks due to the spatially concentrated and time-varying nature of charging loads. Although previous studies have investigated the coordinated planning of electric vehicle charging stations (EVCSs), battery energy storage systems (BESSs), and distributed static compensators (DSTATCOMs), infrastructure planning and operational control are commonly treated as separate stages, with planning decisions typically evaluated using predefined operating strategies or stat…
- OpenAlex · Published · First archived
Chiral Phosphoserine Reconfigures the Energy Conversion Pathway for Efficient and Stable Sequentially Deposited Perovskite Solar Cells ↗
ABSTRACT FAPbI 3 perovskite solar cells (PSCs) fabricated via sequential deposition hold great promise for high photovoltaic performance. However, two bottlenecks remain persistent: transport‐limited conversion that leaves residual PbI 2 and the high thermal prerequisite to drive the δ‐to‐α phase transition, both of which deteriorate optoelectronic properties and accelerate degradation under illumination. Here, we introduced chiral molecules serine and phosphoserine (OPS) into the PbI 2 precursor to raise the reactivity of the inorganic scaffold toward the organic salt, and lowered the kinetic…
- OpenAlex · Published · First archived
The hidden cost of an image: Quantifying the energy consumption of Artificial Intelligence image generation ↗
With the growing adoption of Artificial Intelligence (AI) image generation, in conjunction with the ever-increasing environmental resources demanded by AI, we are urged to answer a fundamental question: What is the environmental impact hidden behind each image we generate? In this research, we present a comprehensive empirical experiment designed to assess the energy consumption of AI image generation through diffusion models. Our experiment compares 17 state-of-the-art image generative models by considering multiple factors that could affect their energy consumption, such as model quantizatio…
- OpenAlex · Published · First archived
Potential, challenges, and opportunities in the development of geothermal energy projects ↗
Geothermal energy is an important yet insufficiently explored renewable source. Known for its supply stability and low environmental impact, it offers significant potential, however, broader adoption faces notable technical, economic, and regulatory challenges. This paper first examines the origin of geothermal energy and its historical use, followed by the technological evolution of systems for both direct thermal use and electricity generation. It also reviews global trends and statistical indicators, providing context for current utilization patterns. The analysis places special emphasis on…
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How to assess evidence about Energy
Check each original source for its methods, release status, limitations, and supporting data. A repository announcement, a preprint, and a published study provide different kinds of evidence. SYMTRI’s subject classification helps discovery; it does not independently validate the source’s claims.
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