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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 ↗702 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
Modeling and hierarchical energy storage dispatch control of a pulverized coal buffer unit for flexible operation of coal-fired power plants ↗
With the increasing integration of renewable energy, coal-fired power units require higher operational flexibility. However, the delays caused by raw coal grinding and pulverized coal transport in conventional direct fired pulverizing systems limit rapid load response. To address this issue, this study proposes a pulverizing system equipped with a pulverized coal buffer unit, which extends the fuel supply mode from a single direct fired mode to a combined direct fired and storage based mode, thereby reducing fuel supply delay and improving operational flexibility. A nonlinear dynamic model of…
- OpenAlex · Published · First archived
Co-enhancement of energy efficiency and dynamic flexibility for indirect air-cooled systems under frequent peak-shaving: Trade-offs of cost, performance and robustness ↗
Deep peak-shaving operation of coal-fired power units requires heat-exchange equipment to rapidly track varying loads. Indirect air-cooled units are central to power supply in water-scarce regions, and their cold-end system rejects heat to ambient air and possesses substantial thermal inertia, so its heat-rejection capacity responds sluggishly to changes in unit load and ambient temperature. Existing heat-exchanger designs address only rated-condition heat rejection, without jointly considering air-side, water-side, and heat-capacity effects, so steady-state efficiency and dynamic flexibility…
- OpenAlex · Published · First archived
A Structured Evaluation of Key Factors for Shallow Geothermal Hybrid Heating and Cooling Systems in the Danube Region Using the Analytic Hierarchy Process ↗
This study presents a structured evaluation of key factors influencing the design of shallow geothermal (SG) hybrid heating and cooling systems in the Danube Region. As part of the Danube GeoHeCo project, a criteria catalogue was developed using the Analytic Hierarchy Process (AHP) to support the creation of an IT decision support tool. Through expert-based pairwise comparisons and eigenvalue analysis, the relative weights of technical, geological, socioeconomic, and environmental criteria were derived. Results show that thermal demand, drilling costs, and hydrogeological site characteristics…
- OpenAlex · Published · First archived
Bisection-SCA optimisation for energy-efficient NOMA-based cooperative wireless-powered mobile edge computing networks ↗
In this paper, a non-orthogonal multiple access based cooperative wireless-powered mobile edge computing architecture is proposed for energy constrained subscriber devices in Internet of Things networks. The system includes an access point and three subscriber devices, co-located with an edge server, and run a harvest-then-offload protocol. A decode-and-forward cooperative relay with maximum ratio combining is incorporated to tackle the double-near-far effect. An energy minimisation problem is then formulated over the eight decision variables that are optimised jointly, along with the resultin…
- OpenAlex · Published · First archived
Life cycle cost-oriented energy management and configuration co-optimization for fuel cell hybrid ships ↗
Fuel cell hybrid ships (FCHS) face challenges in balancing economic optimization, power allocation, and capacity configuration. This study develops an energy management strategy coupled configuration optimization framework integrating adaptive cut-off frequency and low-pass filter for the lithium-ion battery (LIB)-supercapacitor (SC)-FC system. The framework coordinates LIB/SC series-parallel connections and FC output, applying adaptive frequency-splitting thresholds while explicitly accounting for life cycle cost (LCC) and battery degradation induced by dynamic marine load profiles. The Dung…
- OpenAlex · Published · First archived
A nuclear clock synchronized to 229Th ↗
Abstract Atomic clocks have made time and frequency the most precisely measured quantities in physics, progressing from microwave standards that realize the SI second 1 to optical clocks with unprecedented precision 2 . A nuclear clock transfers the frequency reference from an electronic to a nuclear transition and the uniquely low-lying, laser-accessible, isomeric transition in 229 Th currently offers the most practical route to compact, robust timekeeping and sensitive tests of fundamental physics 3–8 . Realizing such a clock requires turning spectroscopy of the 229 Th nuclear resonance 9–17…
- OpenAlex · Published · First archived
Energy-efficient thermal performance of walls and windows for four building orientations in four Indian climatic zones: A verified dynamic analysis of insulation, glazing type and glazing area ↗
Facade design rules for Indian dwellings are still drawn largely from mid-latitude studies. This article presents a verified dynamic analysis of the thermal performance and energy requirements of external walls and windows for four orientations in New Delhi, Mumbai, Jaipur and Shimla, representing the composite, warm-humid, hot-dry and cold climatic zones of India. For design days on 15 December and 15 June, with boundary conditions built from climatological temperatures and a clear-sky irradiance model, transient conduction through uninsulated and externally insulated concrete walls was solve…
- OpenAlex · Published · First archived
Recognized but displaced: Uranium mill tailings and the sustainability accounting of nuclear energy ↗
Nuclear-energy sustainability is usually debated through reactor performance, carbon intensity, fuel availability, operational safety and spent-fuel disposal. Less visible are the front-end residues generated by uranium production, especially uranium mill tailings (UMT), likely the nuclear fuel cycle's largest long-lived radioactive residue stream by volume. This Perspective argues that UMT are not merely neglected; they are recognized and displaced through nested governance boundaries. It develops the concept of volume-based leniency and identifies three linked mechanisms: classification disp…
- OpenAlex · Published · First archived
Integrated Evaluation of Rooftop Solar Power Generation System Performance in Tropical Climate Using Geometric, Electrical, and Environmental Parameters ↗
The increasing demand for electrical energy in the commercial sector has encouraged the utilization of rooftop Photovoltaic (PV) systems as a sustainable energy solution in tropical climate regions. However, rooftop PV performance is influenced by the interaction of geometric, electrical, and environmental parameters, which may affect system efficiency. This study analyzes the performance of a rooftop PV system under tropical climate conditions using PVsyst simulation and actual monitoring data collected over 30 days. The research was conducted on an on-grid rooftop PV system with a capacity o…
- OpenAlex · Published · First archived
Non-contact triboelectric nanogenerators for energy-information systems: Charge-lifecycle engineering, system integration, and sustainability perspectives ↗
The increasing demand for distributed and low-maintenance sensing networks has accelerated the development of integrated energy-harvesting and sensing technologies capable of converting ambient mechanical disturbances into electrical energy and sensing signals. Triboelectric nanogenerators (TENGs) have emerged as promising platforms for converting low-frequency mechanical stimuli into electrical signals; however, conventional contact-mode structures suffer from friction-induced degradation, surface contamination, and limited durability during long-term operation. Non-contact TENGs (NC-TENGs) a…
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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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