Results 41 to 50 of about 17,485 (243)
Double Contour Thermodynamic Cycle with Unidirectional Heat Transfer between the Refrigeration and the Energy Cycle [PDF]
Problems of the Regional Energetics, 2019 Practical characteristics of the method for improving cycles of complex cooling thermotrans-formers associated with the regeneration of the refrigeration cycle heat productivity (RCHP) are considered. The use of heat from the working fluid compression in
Gorpinko Yu.I. +4 more
doaj +1 more source
Carnot Cycles in a Harmonically Confined Ultracold Gas across Bose–Einstein Condensation
Entropy, 2023 Carnot cycles of samples of harmonically confined ultracold 87Rb fluids, near and across Bose–Einstein condensation (BEC), are analyzed. This is achieved through the experimental determination of the corresponding equation of state in terms of the ...
Ignacio Reyes-Ayala +6 more
doaj +1 more source
Quantum Thermodynamic Cycles and quantum heat engines [PDF]
, 2006 In order to describe quantum heat engines, here we systematically study isothermal and isochoric processes for quantum thermodynamic cycles. Based on these results the quantum versions of both the Carnot heat engine and the Otto heat engine are defined ...
C. H. Bennett +15 more
core +2 more sources
Bio‐Friendly Artificial Muscles Based on Carbon Nanotube Yarns and Eutectogel Derivatives
Advanced Functional Materials, EarlyView.Solid‐state artificial muscles based on coiled commercial carbon nanotube yarns coated with eutectogel derivatives exhibit unipolar actuation through selective ion intercalation. Combining polyanionic and polycationic gels enables enhanced contractile stroke and high energy density.
Gabriela Ananieva +6 more
wiley +1 more source
Preliminary prospects of a Carnot-battery based on a supercritical CO2 Brayton cycle
Acta Polytechnica, 2021 As a part of the change towards a higher usage of renewable energy sources, which naturally deliver the energy intermittently, the need for energy storage systems is increasing. For the compensation of the disturbance in power production due to inter-day
Karin Rindt +2 more
doaj +1 more source
Encoding Magnetic Anisotropies in Digital Light Processing 3D Printing
Advanced Functional Materials, EarlyView.A hybrid magnetic device—combining a coaxial coil within a nested Halbach array—is presented, integrated into a DLP 3D printer to enable spatially resolved magnetic field control. This system enables complex, multimodal responses by programming liquid crystal elastomer resins for magnetic and thermal actuation, and by inducing electrically conductive ...
Eléonore Aïdonidis +11 more
wiley +1 more source
Quantum mechanical Carnot engine [PDF]
, 2000 A cyclic thermodynamic heat engine runs most efficiently if it is reversible. Carnot constructed such a reversible heat engine by combining adiabatic and isothermal processes for a system containing an ideal gas.
Bernhard K Meister +7 more
core +2 more sources
THERMODYNAMICAL EFFICIENCY OF A DETONATION ENGINE
Весці Нацыянальнай акадэміі навук Беларусі: Серыя фізіка-тэхнічных навук, 2018 An attempt has been made to analyze qualitatively and quantitatively the thermodynamic cycle of detonative combustion and to compare it with the Otto and Brayton cycles in order to establish the degree of its thermodynamic perfection. A comparison of the
Alhussan Khaled +3 more
doaj +1 more source
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 +5 more
wiley +1 more source
Quantum-dot Carnot engine at maximum power [PDF]
, 2010 We evaluate the efficiency at maximum power of a quantum-dot Carnot heat engine. The universal value of the coefficients at the linear and quadratic order in the temperature gradient are reproduced.
Broeck, Christian Van den +3 more
core +2 more sources