Results 81 to 90 of about 1,302 (254)

Application of natural refrigerants in the industrial refrigeration and heat pumps in the future

, 2022
For more than 150 years natural refrigerants have been used in various industrial applications reaching temperatures from -273°C to more than 300°C and the level of the high temperature limit is difficult to estimate at the time of writing this paper. Ammonia, NH3, R-717 has been the preferred refrigerant for normal everyday industrial refrigeration in
Pachai, Alexander C., Hafner, Armin, Ciconkov, Risto   +2 more
openaire   +1 more source

Ultra‐Radiostable Covalent Conformationally Interlocked Networks Enabling a Universal Radiometal‐Labeling Platform for Cancer Radioembolization

Advanced Science, EarlyView.
Conjugated poly(imide dioxime)‐based microspheres establish a radiometal coordination‐driven conformational interlocked network with ultra‐high radiostability. This platform enables low‐temperature, multi‐radionuclide labeling for SPECT/PET/MRI imaging and radionuclide therapy. Mechanistic insights from EXAFS and DFT reveal enhanced stability, while in
Xiao Xu, Zhenwen Zhao, Yangjie Wang, Zhigang Liu, Zhijie Liu, Xiaoling Li, Zhichen Mao, Lu Xu, Gan Lin, Gang Liu, Hongjuan Ma   +10 more
wiley   +1 more source

The hybrid two stage anticlockwise cycle for ecological energy conversion

E3S Web of Conferences, 2016
The anticlockwise cycle is commonly used for refrigeration, air conditioning and heat pumps applications. The application of refrigerant in the compression cycle is within the temperature limits of the triple point and the critical point.
Cyklis Piotr
doaj   +1 more source

Geometric parameter optimization of ejector-expansion refrigeration cycle with natural refrigerants

International Journal of Energy Research, 2009
Thermodynamic analyses and comparison of ammonia-, propane- and isobutane-based vapour compression refrigeration cycles are presented in this article using constant area mixing ejector as an expansion device. Optimization of ejector geometric parameter based on the maximum cooling COP and performance improvement for different operating conditions is ...
openaire   +1 more source

Fundamental Challenges, Physical Implementations, and Integration Strategies for Ising Machines in Large‐Scale Optimization Tasks

Advanced Electronic Materials, EarlyView.
Ising machines are emerging as specialized hardware solvers for computationally hard optimization problems. This review examines five major platforms—digital CMOS, analog CMOS, emerging devices, coherent optics, and quantum systems—highlighting physics‐rooted advantages and shared bottlenecks in scalability and connectivity.
Hyunjun Lee, Joon Pyo Kim, Sanghyeon Kim
wiley   +1 more source

Technical and Environmental Evaluation of CO2-based Booster Refrigeration Systems

Revista UIS Ingenierías
The present study deals with the performance evaluation of four CO2 booster refrigeration system configurations: a conventional, a parallel compressor, an ejector-based, and an NH3/CO2 cascade configuration, under the ambient conditions of the city of ...
Daniel Vergara-Teran, Gustavo Aranda-Gil, Carlos Amaris   +2 more
doaj   +1 more source

Array‐Level Characterization of Cryogenic RRAM

Advanced Electronic Materials, EarlyView.
This paper reports the first array‐level comprehensive electrical characterization of a 1024‐device HfO2‐based RRAM array from 300, 77 to 4 K, covering forming, set/reset switching, endurance, retention, relaxation, and read disturb. The results manifest the high performance of RRAM array at cryogenic temperatures and huge application potential for ...
Yuyao Lu, Ruofei Hu, Zhixing Jiang, Feng Xu, Bin Gao, Jianshi Tang, He Qian, Huaqiang Wu   +7 more
wiley   +1 more source

Enhancing Dewpoint Indirect Evaporative Cooling with Intermittent Water Spraying and Advanced Materials: A Review

Energies
Dewpoint indirect evaporative cooling (DIEC) offers an energy-efficient, eco-friendly alternative to conventional air conditioning by using water and air to lower temperatures.
Łukasz Stefaniak, Agnieszka Grabka, Juliusz Walaszczyk, Krzysztof Rajski, Jan Danielewicz, Wiktoria Jaskóła, Maja Wochniak, Weronika Żyta   +7 more
doaj   +1 more source

Self‐Adhesive Conductive Elastomers for Gel‐Free Biopotential Recording

Advanced Electronic Materials, EarlyView.
σPOMaC, a self‐adhesive conductive citrate elastomer incorporating PEDOT:PSS and DBSA, enables gel‐free biopotential electrodes with stable conductivity and intrinsic skin adhesion. The composite exhibits low resistivity (∼ 0.02 Ω·cm), robust electrical performance during repeated use, and reliable on‐body ECG acquisition comparable to Ag/AgCl ...
Kirstie M. K. Queener, Alec Brewer, He Sun, Jack Twiddy, Vladimir A. Pozdin, Koji Sode, Alper Bozkurt, Michael Daniele   +7 more
wiley   +1 more source

Glucosinolate and Isothiocyanate Profiles in Different Varieties of Raphanus sativus Seed via Multivariate Data Analysis

AgriFood: Journal of Agricultural Products for Food, EarlyView.
Through HPLC–MS/MS analysis and multivariate statistics, raphani semen (RS) varieties with high functional components were screened. The white raphani semen “Xuebawang” was identified as ideal for further study due to its high bioactive content: glucoraphenin (9010.27 mg/100 g), glucoraphanin (1027.76 mg/100 g), sulforaphane (66.14 mg/100 g), and ...
Yonghua Li, Dongmei Lin, Peng Wu, Rui Gao, Jingxiu Bi, Yuying Jiang, Tong Zhao, Xuexia Yuan, Jianhan Xu, Pingxiang Liu, Yutao Wang   +10 more
wiley   +1 more source