Results 31 to 40 of about 696,535 (296)

Optimal thermal refrigerator

open access: yes, 2009
We study a refrigerator model which consists of two $n$-level systems interacting via a pulsed external field. Each system couples to its own thermal bath at temperatures $T_h$ and $T_c$, respectively ($ \equiv T_c/T_h<1$). The refrigerator functions in two steps: thermally isolated interaction between the systems driven by the external field and ...
Allahverdyan, Armen E.   +2 more
openaire   +2 more sources

Optimizing the thermal energy storage performance of shallow aquifers based on gray correlation analysis and multi-objective optimization

open access: yesNatural Gas Industry B, 2023
The operation parameters and well layout parameters of aquifer thermal energy storage (ATES) system directly influence the thermal energy storage performance. How to optimize the parameters to obtain the optimal process scheme is of great significance to
Yu Shi   +5 more
doaj   +1 more source

Performance evaluation and economic analysis of integrated solid oxide electrolyzer cell and proton exchange membrane fuel cell for power generation

open access: yesHeliyon
In order to generate clean electricity from thermal energy, a hybrid electrochemical system is conceptually developed by coupling the proton exchange membrane fuel cell (PEMFC) and solid oxide electrolyzer cell (SOEC).
Armin Abdollahipour, Hoseyn Sayyaadi
doaj   +1 more source

Steady and transient modeling of dye-sensitive solar cells: The impact of electrode thickness and dye specifications

open access: yesEnergy Conversion and Management: X
Investigating the impact of dye compounds on cell performance is crucial for advancing dye-sensitized solar cells (DSSCs). This research focuses on the sensitivity analysis of the effect of critical parameters to enhance DSSC efficiency using a thermo ...
Mona Rahmatian, Hoseyn Sayyaadi
doaj   +1 more source

Efficiency of quantum versus classical annealing in non-convex learning problems

open access: yes, 2017
Quantum annealers aim at solving non-convex optimization problems by exploiting cooperative tunneling effects to escape local minima. The underlying idea consists in designing a classical energy function whose ground states are the sought optimal ...
Baldassi, Carlo, Zecchina, Riccardo
core   +1 more source

Modelling end-pumped solid state lasers [PDF]

open access: yes, 2008
The operation dynamics of end-pumped solid-state lasers are investigated by means of a spatially resolved numerical rate-equation model and a time-dependent analytical thermal model.
Bernhardi, E.H.   +3 more
core   +2 more sources

Multi-objective optimization of endoreversible magnetohydrodynamic cycle

open access: yesEnergy Reports, 2022
According to the magnetohydrodynamic cycle model established in the previous literature, this article applies finite time thermodynamic theory and NSGA-II algorithm to conduct multi-objective optimization by taking heat exchanger thermal conductance ...
Qingkun Wu   +3 more
doaj   +1 more source

Optimal off-grid electricity supply for a residential complex using water-energy-economic-environmental nexus

open access: yesEnergy Conversion and Management: X
This study evaluates the performance of off-grid hybrid renewable energy systems for a residential building in Tehran, analyzing nine scenarios that combine photovoltaic (PV) panels, vanadium redox flow (VRF), lithium iron phosphate (LFP), and nickel ...
Mozhgan Jafari, Hoseyn Sayyaadi
doaj   +1 more source

Cool Roof Impact on Building Energy Need: The Role of Thermal Insulation with Varying Climate Conditions [PDF]

open access: yes, 2019
Cool roof effectiveness in improving building thermal-energy performance is affected by different variables. In particular, roof insulation level and climate conditions are key parameters influencing cool roofs benefits and whole building energy ...
Cabeza, Luisa F.   +5 more
core   +2 more sources

Thermal food processing computation software [PDF]

open access: yes, 2011
The objective of this research consisted of developing the two following thermal food processing software: “F-CALC” is software developed to carry out thermal process calculations based on the well-known Ball's formula method, and “OPT-PROx” is software ...
Abakarov, Alik
core   +2 more sources

Home - About - Disclaimer - Privacy