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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 ↗666 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
Uncooled mid-infrared photovoltaic detector based on Pb1−xCdxSe thin films for use in non-dispersive infrared methane gas sensors ↗
Abstract This work is focussed on sputtered lead cadmium selenide (Pb 1−x Cd x Se) thin films as the active material within high-speed room temperature mid-infrared photovoltaic (PV) detectors for use in non-dispersive infrared gas sensors. Variation of the Cd content provides a means of controlling material bandgap and hence wavelength response. Traditional methods of Pb 1−x Cd x Se deposition are thermal evaporation or chemical bath techniques which do not provide required stable deposition for accurate control of Cd content and hence wavelength response. This paper describes pulsed direct c…
- OpenAlex · Published · First archived
Cold plate with orifice-type manifolds and 3-pass channels for high temperature uniformity in battery packs ↗
Flow maldistribution in liquid-cooled cold plates is often overlooked in battery thermal management system (BTMS) design, despite its critical influence on cell-to-cell temperature uniformity at the pack level. This study proposes a novel bottom-cooled liquid cold plate that integrates orifice-type manifolds with a parallel 3-pass channel configuration to systematically address coolant flow maldistribution and temperature gradients in battery packs. First, the effects of flow maldistribution in parallel-straight-channel cold plates are quantified, revealing a flow maldistribution factor of up…
- OpenAlex · Published · First archived
Cradle-to-gate carbon footprints of battery-grade nickel and cobalt cathode materials ↗
Nickel sulfate (NiSO 4 ) and cobalt sulfate (CoSO 4 ) are key cathode precursors for lithium nickel–cobalt–manganese (NCM) batteries; however, their production raises important sustainability concerns. Existing studies often overlook the diversity of upstream products, the role of Chinese refining activities, and the co-production of nickel and cobalt chemicals. This study integrates enterprise data from China's domestic refining sector with upstream processing for NiSO 4 and CoSO 4 production, providing a comprehensive evaluation of their carbon footprint (CF) characteristics across typical p…
- OpenAlex · Published · First archived
Sustainable Building in Catalonia: Recycling, Energy Efficiency and the Circular Economy in Construction ↗
This study analyses how the construction sector in Catalonia is advancing towards a circular economy model through four dimensions: construction and demolition waste (CDW) recycling, Energy Saving Certificates (CAEs), passive building design and the RECONS environmental certification. The literature has examined these dimensions separately, and the contribution of regional, company-level certification schemes such as RECONS remains largely unexplored. An exploratory multiple-case-study design based on documentary analysis and source triangulation is applied to representative initiatives in Cat…
- OpenAlex · Published · First archived
Impact of Wind-Induced Phase-Shift Errors on RIS-Assisted Cell-Free Massive MIMO Networks: Spectral and Energy-Efficiency Analysis ↗
Reconfigurable intelligent surfaces (RISs) can improve spectral efficiency (SE) and energy efficiency (EE) in cell-free massive multiple-input multiple-output (CF-mMIMO) networks by coherently controlling reflected propagation paths. Outdoor panels, however, can experience wind-driven displacement and vibration that perturb their programmed reflection phases. This study develops a physics-informed, explicitly phenomenological framework that maps wind speed to the standard deviation of RIS phase error and propagates the resulting uncertainty through a downlink CF-mMIMO simulator. The mechanical…
- OpenAlex · Published · First archived
Resilient load frequency control of power systems with energy storage under DoS attacks ↗
With the growing reliance of power systems on communication networks, denial-of-service attacks on communication links induce link congestion, which poses a severe threat to system frequency stability. Therefore, this paper addresses the load frequency control problem for power systems equipped with energy storage systems subject to denial-of-service attacks. First, the system for each region is represented as an aperiodic sampled-data control system that includes external disturbances. Then, based on the analysis of existing Lyapunov functional studies, an improved Lyapunov function V 5 ( t )…
- OpenAlex · Published · First archived
Modification strategies for Mn3O4-based cathode materials: Multi-factor synergistic design towards high-performance and sustainable energy storage ↗
Manganese tetroxide (Mn 3 O 4 ) has attracted considerable attention as a cathode material for sustainable energy storage applications owing to its natural abundance and high theoretical capacity. However, its practical application is hindered by poor conductivity, significant volume variation and Mn dissolution, leading to inadequate cycling stability and rate performance. This systematic review comprehensively examines recent advances in modifying Mn 3 O 4 -based cathodes. Following a critical analysis of the fundamental challenges, three core modification strategies are systematically evalu…
- OpenAlex · Published · First archived
Synthesis and performance optimization of an integrated tandem beam splitting module with perovskite solar cells ↗
The global energy transition demands increasingly efficient utilization of renewable energy sources. Solar spectral beam splitting technology, which directs photons of different wavelengths to photovoltaic and photothermal units respectively, offers a promising pathway toward comprehensive solar energy utilization. Perovskite solar cells, with their advantages of low cost, tunable bandgap, and high efficiency in short-wavelength bands, represent ideal photovoltaic components for such systems. This study investigated an integrated small-scale tandem beam splitting module combining thin-film int…
- OpenAlex · Published · First archived
Performance Evaluation of a Novel Solar Thermal Water Heating System Integrated with Thermal Energy Storage: A New Zealand Case Study ↗
This study evaluates a solar thermal water heating system integrated with thermal energy storage (TES) for domestic hot water supply in New Zealand. A conventional system without TES was first assessed as the baseline case and then compared with a TES-integrated system using Paraffin RT60 as the phase change material and Therminol 55 as the heat transfer fluid. The analysis was based on three selected seven-day periods in 2025, representing summer, winter, and intermediate weather conditions. The simulation results show that TES improves the stability of the water temperature inside the tank,…
- OpenAlex · Published · First archived
Toward high-efficiency photovoltaic energy harvesting: experimental validation of continuous, hybrid, and sensorless dual-axis tracking systems with fixed-tilt solar system ↗
Solar tracking systems have gained considerable attention due to their potential to increase the energy yield of photovoltaic (PV) systems by maintaining the PV module at a favorable orientation relative to the Sun. However, conventional dual-axis trackers often rely on high-power motors and frequent mechanical actuation, resulting in substantial auxiliary energy consumption and depletion of stored battery energy that could otherwise be conserved for nighttime operation. Moreover, variations in solar position caused by daily and seasonal changes, together with unpredictable weather conditions…
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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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