Results 1 to 10 of about 741,256 (147)

Analysis and improvement of the efficiency of NH3-NaSCN single effect absorption cooling system

Heliyon, 2022
This work aims at reinforcing simultaneously the coefficient of performance (COP) and the exergetic coefficient of performance (ECOP), in order to improve the operation of an absorption chiller to be used in tropical areas.
Gilbert Roméo Hubert Ngock, Jean Gaston Tamba, Francis Djanna, Salomé Essiane Ndjakomo   +3 more
doaj   +1 more source

Performance of apparent diffusion coefficient values and ratios for the prediction of prostate cancer aggressiveness across different MRI acquisition settings

Diagnostic and Interventional Radiology, 2022
PURPOSE:In this study, we assessed the performance of apparent diffusion coefficient (ADC) and diffusion-weighted imaging (DWI) metrics and their ratios across different magnetic resonance imaging (MRI) acquisition settings, with or without an endorectal
Ercan Karaarslan, Aylin Altan Kus, Deniz Alis, Umut Can Karaarslan, Yesim Saglican, Omer Burak Argun, Ali Riza Kural   +6 more
doaj   +1 more source

Study on the Long-Term Performance and Efficiency of Single-Well Circulation Coupled Groundwater Heat Pump System Based on Field Test

Frontiers in Earth Science, 2021
Although buildings are often heated and cooled by single-well circulation coupled groundwater heat pump systems, few studies have evaluated the long-term performance of these systems.
Ke Zhu, Ke Zhu, Yifan Zeng, Yifan Zeng, Qiang Wu, Qiang Wu, Shengheng Xu, Shengheng Xu, Kun Tu, Kun Tu, Xiaoxiu Liu, Xiaoxiu Liu   +11 more
doaj   +1 more source

Analysis of Performance of Cavitation Models with Analytically Calculated Coefficients [PDF]

Energies, 2021
Cavitation is often simulated using a mixture model, which considers the transport of an active scalar, namely the vapor fraction αv. Source and sink terms of the transport equation of αv, namely vaporization and condensation terms, rule the dynamics of the cavity and are described through different models.
Andrea Savio, Marta Cianferra, Vincenzo Armenio   +2 more
openaire   +3 more sources

Four-Objective Optimizations of a Single Resonance Energy Selective Electron Refrigerator

Entropy, 2022
According to the established model of a single resonance energy selective electron refrigerator with heat leakage in the previous literature, this paper performs multi-objective optimization with finite-time thermodynamic theory and NSGA-II algorithm ...
Jinhu He, Lingen Chen, Yanlin Ge, Shuangshuang Shi, Fang Li   +4 more
doaj   +1 more source

Influence of Clearance Volume on Performance of Reciprocating Compressor

Zhileng xuebao, 2021
The cooling capacity of a reciprocating compressor can be finely adjusted using the clearance volume. To study the influence of the clearance volume and the intermediate clearance volume on the performance of the reciprocating compressor, the clearance ...
Wei Huijun, Feng Hai, Zhao Xumin, Xu Min, Chen Juanjuan   +4 more
doaj   +2 more sources

Water Extraction from Air: A Proposal for a New Indicator to Compare Air Water Generators Efficiency

Energies, 2021
Water extraction from air, based on reverse cycle systems, is becoming a technology more and more diffused and various models of air to water generators (AWG) are now available, all claiming the best efficiency. To date, there is not a standard indicator
Lucia Cattani, Anna Magrini, Paolo Cattani   +2 more
doaj   +1 more source

Predicting Automotive Air Conditioning System performance through Deep learning [PDF]

FME Transactions
Automotive Air Conditioning System (AACS) involves phase change of the refrigerant, to provide a comfortable environment in the vehicle cabin. The phase change is governed by many complex equations.
Gavali Pradipkumar M., Yadav S.D.
doaj   +1 more source

The State of the Art on the Flow Characteristic of an Encapsulated Phase-Change Material Slurry

Energies, 2023
The paper chronologically describes the results of research on the flow of micro-encapsulated PCM (mPCM) and nano-encapsulated PCM (nPCM) slurry in heat-transfer systems.
Krzysztof Dutkowski, Marcin Kruzel
doaj   +1 more source

Machine-Learning-Based Coefficient of Performance Prediction Model for Heat Pump Systems

Applied Sciences, 2021
In a heat pump system, performance is an important indicator that should be monitored for system optimization, fault diagnosis, and operational efficiency improvement.
Ji-Hyun Shin, Young-Hum Cho
doaj   +1 more source