Results 11 to 20 of about 23,169 (217)

A Machine Learning Framework With an Intelligent Algorithm for Predicting the Isentropic Efficiency of a Hydraulic Diaphragm Metering Pump in the Organic Rankine Cycle System

open access: yesFrontiers in Energy Research, 2022
The pump provides the necessary pressure and flow for the organic Rankine cycle (ORC) system. The traditional methods have obvious limitations when analyzing the time-varying characteristics of the key operating parameters of the pump.
Xu Ping, Baofeng Yao, Kai Niu, Meng Yuan
doaj   +3 more sources

Correlation Between Volumetric Efficiency and Isentropic Efficiency of Piston Compressor of Thermal Pump

open access: yesChemical and Petroleum Engineering, 2018
A relationship that establishes a correlation between the isentropic efficiency and volumetric efficiency of a piston compressor and that takes into account the dead volume, engine pressure ratio, and the state of the working body at the start of the compression process and its adiabatic index is obtained.
Mamaev V.K.   +3 more
openaire   +5 more sources

Identification of Key Parameters and Construction of Empirical Formulas for Isentropic and Volumetric Efficiency of High-Temperature Heat Pumps Based on XGBoost-MLR Algorithm

open access: yesEnergies
High-temperature heat pumps (HTHPs) have gradually begun to play an essential role in using heat in industry for waste heat recovery and providing higher-grade heat.
Shuaiqi Li   +4 more
doaj   +3 more sources

The Role of the Compressor Isentropic Efficiency in Non-Intrusive Refrigerant Side Characterization of Transcritical CO2 Heat Pump Water Heaters

open access: yesClean Technologies, 2022
Characterizing the refrigerant side of heat pump water heaters (HPWHs) can be intrusive and expensive. On the other hand, direct external measurement techniques can be unfeasible, particularly in commercial HPWHs for residential applications.
Francisco B. Lamas, Vítor A. F. Costa
doaj   +1 more source

Implementation of Adaptive Neuro-fuzzy Model to Optimize Operational Process of Multiconfiguration Gas-Turbines

open access: yesAdvances in High Energy Physics, 2020
In this article, the adaptive neuro-fuzzy inference system (ANFIS) and multiconfiguration gas-turbines are used to predict the optimal gas-turbine operating parameters.
Chao Deng   +5 more
doaj   +1 more source

Experimental and numerical research of compressor performance parameters [PDF]

open access: yesMATEC Web of Conferences, 2023
The development of hydraulic parts of a compressor is based on a simplified flow model (often one-dimensional), the methodology of which is externally supported by CFD simulations.
Knížat Branislav   +3 more
doaj   +1 more source

Multi-objective optimization of a novel reversible High-Temperature Heat Pump-Organic Rankine Cycle (HTHP-ORC) for industrial low-grade waste heat recovery [PDF]

open access: yes, 2019
Nowadays, a high amount of industrial thermal energy is still lost due to the lack of competitive solutions for energy revalorization. Facing this challenge, this paper presents a novel technology, based on a reversible High-Temperature Heat Pump (HTHP ...
Amat-Albuixech, Marta   +5 more
core   +1 more source

Optimization of a Centrifugal Compressor Using the Design of Experiment Technique [PDF]

open access: yes, 2019
Centrifugal compressor performance is affected by many parameters, optimization of which can lead to superior designs. Recognizing the most important parameters affecting performance helps to reduce the optimization process cost.
Aungier, Mason, Mojaddam
core   +1 more source

THE OPTIMUM OVERALL PRESSURE RATIO OF THE INTERCOOLED GAS TURBINE UNIT

open access: yesИзвестия высших учебных заведений: Проблемы энергетики, 2017
In the article developed a mathematical model expansion and contraction of a real gas. Article shows the relationship between the isentropic efficiency of the compressor and the isentropic efficiency of the compressor stages. It was proved the need for a
N. G. Khasanov, A. B. Shigapov
doaj   +1 more source

Influence of selected cycle components parameters on the supercritical CO2 power unit performance

open access: yesMATEC Web of Conferences, 2018
The paper presents the influence of selected components parameters on the performance of supercritical carbon dioxide power unit. For this analysis mathematical model of supercritical recompression Brayton cycle was created.
Wołowicz Marcin   +2 more
doaj   +1 more source

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