Results 71 to 80 of about 7,800 (206)

Temperature‐ and Light‐Regulated Liquid Crystal Smart Window for Dynamic Control of Daylight and Solar Heat in All‐Weather Conditions

Angewandte Chemie, Volume 138, Issue 34, 17 August 2026.
An environmentally adaptive smart window based on the interplay of light‐driven molecular motors and liquid crystal (LC) polymers is developed. The window can dynamically switch among three distinct working states: transparent, reflective, and scattering, depending on ambient temperature and solar light intensity, enabling excellent modulation of ...
Yang Zhang, Ying Wu, Wenxuan Liu, Xin Wang, Dirk J. Broer, Ben L. Feringa, Jiawen Chen   +6 more
wiley   +2 more sources

Parallel operation of diode-rectifier based HVDC link and HVAC link for offshore wind power transmission

The Journal of Engineering, 2019
This paper investigates the integration of large offshore wind farms using parallel HVAC and diode-rectifier based HVDC (DR-HVDC) systems. Three different operation modes, i.e.
Lujie Yu, Rui Li, Rui Li, Lie Xu
doaj   +1 more source

Current‐Carrying Characteristics of High‐Voltage Land Cables With Different Grounding Methods for Low‐Frequency AC Transmission

High Voltage, EarlyView.
ABSTRACT Low‐frequency AC transmission holds promise for high‐voltage land cables, but its ampacity is significantly influenced by cable grounding methods and other structural factors. To explore the specific low‐frequency current‐carrying characteristics of high‐voltage land cables, this paper conducts a thorough theoretical analysis of the coupling ...
Yongpei Li, Lulu Li, Qiang Ran, Jie Chen, Kongyao Wu   +4 more
wiley   +1 more source

Flexibility Feasible Region Construction and Operation Optimization for Urban Residential Smart Buildings

IET Smart Energy Systems, EarlyView.
To effectively harness the flexibility of urban residential buildings, this study proposes using the feasible flexibility region (FFR) of residential smart buildings (RSB) as an alternative to directly scheduling a large number of diverse, dispersed, and heterogeneous flexibility resources.
Youjun Deng, Fengji Luo, Yongxi Zhang, Anan Zhang   +3 more
wiley   +1 more source

The Influence of the Surface of Ventilation Duct on Sound Attenuation in the Airflow

Archives of Acoustics
These studies focus on acoustical parameters of steel flat-oval ducts as a function of their roughness. The four types of steel ducts were measured: raw steel, galvanised steel, painted steel, and aluminium as the reference one. The roughness of the duct
Joanna Maria Kopania, Kamil Wójciak, Patryk Gaj, Grzegorz Bogusławski   +3 more
doaj   +1 more source

The Application of U-shape Heat Pipe Heat Exchanger to Reduce Relative Humidity for Energy Conservation in Heating, Ventilation, and Air Conditioning (HVAC) Systems

International Journal of Technology, 2019
Hospitals consume large amounts of energy, especially in their heating, ventilation, and air conditioning (HVAC) systems due to the special requirements for ensuring healthy, comfortable, and safe environmental conditions.
Aliefka Satria Kusumah, Imansyah Ibnu Hakim, Ragil Sukarno, Fadhil Fuad Rachman, Nandy Putra   +4 more
doaj   +1 more source

Shade variability and stability in interim and definitive tooth‐colored resin‐based restorative materials: Comparing manufacturer‐claimed shades to a universal shade guide

Journal of Prosthodontics, EarlyView.
Abstract Purpose To evaluate the shade variability and stability of interim and definitive tooth‐colored restorative materials by comparing manufacturer‐claimed shades to a universal shade guide before and after thermocycling. Materials and Methods Eight commercially available tooth‐colored restorative materials were tested, including conventional ...
Amal Alfaraj, Toshiki Nagai, Wei‐Shao Lin   +2 more
wiley   +1 more source

Multi-Model Predictive Control on HVAC Chilled Water Pump for Temperature Control and Energy Consumption Reduction for Auditorium

Jurnal Elkomika
Most energy consumption comes from the high demand from buildings. A large portion from buildings comes from the HVAC systems. A proper optimal control strategy is needed for energy savings.
MUHAMMAD AFIFF RIZKI, ARIES SUBIANTORO
doaj   +1 more source

HVAC Systems Heat Recovery with Multi-Layered Oscillating Heat Pipes

Journal of Mechanical Engineering, 2019
The aim of this work is to investigate a heat performance of a Multi-Layered Oscillating Heat Pipes Heat Exchanger (ML-OHPHE) for the application of heat recovery in heating, ventilation and air conditioning systems (HVAC systems).
Kabát Juraj, Gužela Štefan, Peciar Peter   +2 more
doaj   +1 more source

Analysis of brain activity during local hot-cold stimulus using near-infrared spectroscopy (Analysis of brain activity during pain stimulus by cold stimulus)

Nihon Kikai Gakkai ronbunshu, 2015
Methods such as the Predicted Mean Vote and Standard New Effective Temperature were developed to evaluate thermal comfort. However, radiation and convection of heat due to factors such as sunlight or air cycle are strong in indoor environments. Moreover,
Lei HOU, Keiichi WATANUKI, Yusuke SOTOIKE   +2 more
doaj   +1 more source