Results 21 to 30 of about 80,518 (317)

Combustion Heated Thermionic Systems

open access: yesSAE Technical Paper Series, 1992
<div class="htmlview paragraph">Thermionic cogeneration is developing as a new energy conservation option. The characteristics of thermionic systems using combustion of natural gas as heat source are studied. The - until now unused - high temperature potential of fuels can be applied in order to extract work using the high temperature thermionic ...
Veltkamp, W.B.   +2 more
openaire   +2 more sources

The Concept of Segmented Wind Turbine Blades: A Review

open access: yesEnergies, 2017
There is a trend to increase the length of wind turbine blades in an effort to reduce the cost of energy (COE). This causes manufacturing and transportation issues, which have given rise to the concept of segmented wind turbine blades.
Mathijs Peeters   +3 more
doaj   +1 more source

Quantitative analysis of heat transfer characteristics and advantages in opposed-piston 2-stroke diesel engines

open access: yesCase Studies in Thermal Engineering, 2023
Opposed-piston 2-stroke diesel engines (OP2S) have lower combustion chamber surface-area-to-volume ratio, resulting in lower transfer loss but also excessive surface temperature.
Sufei Wang, Fujun Zhang
doaj   +1 more source

Theoretical limits of scaling-down internal combustion engines [PDF]

open access: yes, 2010
Small-scale energy conversion devices are being developed for a variety of applications; these include propulsion units for micro aerial vehicles (MAV). The high specific energy of hydrocarbon and hydrogen fuels, as compared to other energy storing means,
Sher, E., Sher, Ilai, I. Sher, E. Sher
core   +1 more source

Gas-wall heat flux analysis on PCI combustion by using the one-dimensional model (Effect of change in heat loss under transient operation)

open access: yesNihon Kikai Gakkai ronbunshu, 2021
Premixed Compression Ignition (PCI) engine has a potential to improve transient performance as well as exhaust emissions. In this paper, a one-dimensional engine model combined with a heat transfer model is used to analyze heat flux between in-cylinder ...
Kyohei YAMAGUCHI   +4 more
doaj   +1 more source

8-stroke low heat rejection engine

open access: yesEnergy Reports, 2022
In a combustion engine, 25% of the energy present in the fuel is wasted as heat; this heat is dissipated to avoid overheating and prevent damages. This article presented a simulation work developed to study an internal combustion engine with a low heat ...
D. Silva Cardoso, P. Oliveira Fael
doaj   +1 more source

Hybrid RANS/LES computation of plane impinging jet flow

open access: yesArchives of Mechanics, 2011
Flow characteristics are presented of simulation results of plane impinging jets at high nozzle-plate distances, with two k-ω based hybrid RANS/LES (Reynolds Averaged Navier–Stokes/Large–Eddy Simulation) models and a k-ω RANS model. The first hybrid RANS/
S. Kubacki, J. Rokicki, E. Dick
doaj   +1 more source

Numerical and Experimental Analysis of Heat Transfer for Solid Fuels Combustion in Fixed Bed Conditions

open access: yesEnergies, 2020
The paper concerns the analysis of the heat transfer process that occurred during solid fuel burning in fixed bed conditions. The subject of the analysis is a cylindrical combustion chamber with an output of 12 kW heating power equipped with a retort ...
Wojciech Judt
doaj   +1 more source

Effects of injector geometric parameters on the combustion and heat transfer process inside a 7-elements methane combustion chamber

open access: yesCase Studies in Thermal Engineering, 2022
Adequate understanding of the combustion and heat transfer characteristics are considered key points for the development of methane engines. In this paper, a methane combustion chamber with 7-elements is simulated under RANS frame with EDC combustion ...
Changguo Liu, Silong Zhang, Daren Yu
doaj   +1 more source

Comparison of Moving Boundary and Finite-Volume Heat Exchanger Models in the Modelica Language

open access: yesEnergies, 2016
When modeling low capacity energy systems, such as a small size (5–150 kWel) organic Rankine cycle unit, the governing dynamics are mainly concentrated in the heat exchangers. As a consequence, the accuracy and simulation speed of the higher level system
Adriano Desideri   +6 more
doaj   +1 more source

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