Results 41 to 50 of about 423 (182)

From the Discovery of the Giant Magnetocaloric Effect to the Development of High‐Power‐Density Systems

Advanced Materials Technologies, EarlyView.
The article overviews past and current efforts on caloric materials and systems, highlighting the contributions of Ames National Laboratory to the field. Solid‐state caloric heat pumping is an innovative method that can be implemented in a wide range of cooling and heating applications.
Agata Czernuszewicz, Yaroslav Mudryk, Jun Cui, Lucas Griffith, Duane D. Johnson, Julie Slaughter   +5 more
wiley   +1 more source

Critical Limitations in Cryogenic Laser Cooling of Solids: Symmetry‐Related Fluorescence Trapping and Condensation‐Induced Parasitic Heating

Advanced Science, EarlyView.
This study uncovers two overlooked bottlenecks in cryogenic laser cooling of solids: symmetry‐driven fluorescence trapping and water vapor condensation. We demonstrate that breaking sample symmetry enhances fluorescence escape, while condensation dominates parasitic heating below 135 K.
Biao Zhong, Jiayi Zhang, Haodong Yang, Lianzhong Deng, Mauro Tonelli, Ercang Luo   +5 more
wiley   +1 more source

Development of a low-temperature driven absorption chiller with vapour exchange double-lift absorption cooling cycle (Experimental proof of 7 ℃ chilled water output driven by 60 ℃ hot water with a prototype)

Nihon Kikai Gakkai ronbunshu, 2022
Conventional single-effect absorption chillers require an 80~90 ℃ heat source to supply 7~8 ℃ chilled water for air conditioning applications. However, it is difficult to recover lower temperature heat sources such as 60 ℃ hot water with single-effect ...
Tatsuo FUJII, Shuichiro UCHIDA
doaj   +1 more source

Intelligent Control Framework of District Heating Systems Considering Waste Heat Utilization in Data Centers

Energy Science &Engineering, EarlyView.
A deep reinforcement learning–based control architecture is proposed to coordinate heat pumps, thermal storage, renewable energy, and demand response in data center waste heat recovery systems. The agent learns optimal control actions from system states and reward feedback to achieve electrical–thermal co‐optimization under realistic operational ...
Rendong Shen, Ruifan Zheng, Shengyuan Zhong, Lei Gu, Dongfang Yang, Jun Zhao   +5 more
wiley   +1 more source

Comparison of a Solar Driven Absorption Chiller and Photovoltaic Compression Chiller Under Different Demand Profiles: Technological, Environmental and Economic Performance

Energies
HVAC systems are becoming increasingly important around the world due to the increasing need for climatization in recent years. While district heating systems have been used for a long time, district cooling systems tend to be something that is only ...
Juan José Roncal-Casano, Javier Rodríguez-Martín, Paolo Taddeo, Javier Muñoz-Antón, Alberto Abánades-Velasco   +4 more
doaj   +1 more source

Increasing the Efficiency of Turbine Inlet Air Cooling in Climatic Conditions of China through Rational Designing—Part 1: A Case Study for Subtropical Climate: General Approaches and Criteria

Energies, 2023
The enhancement of gas turbine (GT) efficiency through inlet air cooling, known as TIAC, in chillers using the heat of exhaust gas is one of the most attractive tendencies in energetics, particularly in thermal engineering.
Mykola Radchenko, Zongming Yang, Anatoliy Pavlenko, Andrii Radchenko, Roman Radchenko, Hanna Koshlak, Guozhi Bao   +6 more
doaj   +1 more source

A residential absorption chiller for high ambient temperatures

International Journal of Refrigeration, 2020
Abstract A standalone, compact, thermally driven ammonia-water absorption chiller designed to deliver a cooling capacity of 10.5 kW at ambient temperatures greater than 40 °C is presented. Heat and mass exchangers with novel microscale features and geometries are employed to minimize the physical size of the system.
Girish Kini, Sriram Chandrasekaran, Michael Tambasco, Srinivas Garimella   +3 more
openaire   +2 more sources

Wet‐Transferred MoS2 on Passivated InP: A Van der Waals Heterostructure for Advanced Optoelectronic Applications

physica status solidi (RRL) – Rapid Research Letters, Volume 19, Issue 5, May 2025.
This study presents a photodetector based on atomically thin MoS2 on an InP substrate, forming an n‐MoS2/p‐InP type‐II staggered heterojunction. The device exhibits excellent rectifying properties with an ideality factor of 1.57 and achieves a peak photoresponsivity of 960 mA W−1, while MoS2 provides stable passivation for InP. III–V semiconductors are
Dong Hwi Choi, Jae Hyeop Lee, Min Su Kim, Jaeseo Park, Jun Oh Kim, Teli Aviraj Mahadev, Beknalkar Sonali Ajay, Hong Hyuk Kim, Jae Cheol Shin   +8 more
wiley   +1 more source

Mitochondrial function predicts dominance status in brown trout

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract In social hierarchies, winning contests confers better access to food, shelter and reproductive opportunities. Clear dominance relationships are often apparent even when opponents are matched for experience, age, size and other obvious characteristics.
Darryl McLennan, Agnieszka Magierecka, Tom Sloan, Neal J. Dawson, Caroline Millet, Neil B. Metcalfe   +5 more
wiley   +1 more source

Aerobic scope is sustained through a heatwave in juvenile Atlantic salmon (Salmo salar)

Journal of Fish Biology, EarlyView.
Abstract Aquatic ectotherms are vulnerable to heatwave‐induced physiological stress, which arises from increased energy demands and reduced dissolved oxygen content in warmer waters. Understanding thermal physiology is critical for predicting how commercially and ecologically important populations could be affected by the increasing risk of rising ...
Lucy Cotgrove, Sergey Morozov, Miika Raitakivi, Evan Sala, Jenni M. Prokkola   +4 more
wiley   +1 more source