Results 11 to 20 of about 1,832,674 (379)

Experimental Research on Performance Comparison of Compressed Air Engine under Different Operation Modes

open access: yesEnergies, 2023
An air-powered vehicle is a low-cost method to achieve low-pollution transportation, and compressed air engines (CAE) have become a research hotspot for their compact structure, low consumption, and wide working conditions.
Jia Liang   +7 more
doaj   +1 more source

Combustion Characteristics of Coal-Water Slurry Droplets in High-Temperature Air with the Addition of Syngas

open access: yesEnergies, 2023
An experimental study of the ignition and combustion processes of coal-water slurry (CWS) droplets based on coal enrichment waste in a high-temperature oxidizer at 650–850 °C with a syngas addition was carried out. The fuel slurry was a mixture of finely
Maxim Belonogov   +4 more
doaj   +1 more source

Performance Improvement of KCS (Kalina Cycle System) 34 by Replacing Throttle Valve With Single-Screw Expander

open access: yesFrontiers in Energy Research, 2021
In order to recover the energy loss due to the throttling in the path of ammonia-lean solution in the Kalina Cycle System (KCS) 34, two redesigned cycles, in which single-screw expanders that can perform two-phase expansion are used to replace the ...
Xinxin Zhang   +9 more
doaj   +1 more source

Interaction between Droplets and Particles as Oil–Water Slurry Components

open access: yesEnergies, 2022
The characteristics of the collisions of droplets with the surfaces of particles and substrates of promising oil–water slurry components (oil, water and coal) were experimentally studied.
Anastasia Islamova   +3 more
doaj   +1 more source

VERIFICATION OF THE PHYSICAL AND MATHEMATICAL MODEL FOR CALCULATION OF AERODYNAMIC CHARACTERISTICS OF BLUFF BODIES MOVING IN AIR AT LARGE MACH NUMBERS

open access: yesСистемный анализ и прикладная информатика, 2018
The verification results of the computer simulation model for calculation of aerodynamic characteristics of bluff bodies (cone with different apex angles and a «cone–cylinder» body) moving in air at different Mach number and zero angle of attack are ...
A. D. Chorny   +5 more
doaj   +1 more source

Modelling of shaded and unshaded shallow-ground heat pump system for a residential building block in a Mediterranean climate [PDF]

open access: yes, 2016
Heat pumps may be coupled to shallow-ground geothermal fields and used for the purpose of space heating and cooling of buildings. However, quite often it is not possible to locate the geothermal field in cleared grounds, especially in cities where ...
34th UIT Heat Transfer Conference 2016   +2 more
core   +1 more source

Performance Study of a Cylindrical Parabolic Concentrating Solar Water Heater with Nail Type Twisted Tape Inserts in the Copper Absorber Tube

open access: yesEnergies, 2018
This paper reports the overall thermal performance of a cylindrical parabolic concentrating solar water heater (CPCSWH) with inserting nail type twisted tape (NTT) in the copper absorber tube for the nail twist pitch ratios, 4.787, 6.914 and 9.042 ...
Amit K. Bhakta   +2 more
doaj   +1 more source

Heat transfer coefficient saturation in superconducting Nb tunnel junctions contacted to a NbTiN circuit and an Au energy relaxation layer [PDF]

open access: yes, 2014
In this paper we present the experimental realization of a Nb tunnel junction connected to a high-gap superconducting NbTiN embedding circuit. We investigate relaxation of nonequilibrium quasiparticles in a small volume Au layer between the Nb tunnel ...
Honingh, Netty   +4 more
core   +1 more source

Slagging Characteristics of a Steam Boiler Furnace with Flare Combustion of Solid Fuel When Switching to Composite Slurry Fuel

open access: yesApplied Sciences, 2022
Two interconnected mathematical models have been developed to describe slagging of a steam boiler furnace at the macro and micro levels. The macro-level model is implemented in Ansys Fluent.
Dmitrii Glushkov   +3 more
doaj   +1 more source

Dynamic simulation of indirect air conditioning systems with optimized computational time [PDF]

open access: yesE3S Web of Conferences, 2019
The simulation of HVAC systems is a powerful tool to improve the energy efficiency in buildings. The modelling of such systems faces several obstacles due to both the physical phenomenology present and the numerical resolution difficulties.
Ablanque Nicolás   +4 more
doaj   +1 more source

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