Results 11 to 20 of about 54,534 (282)

Calculation model for strain of buried pipeline under the action of continuous surface displacement

open access: yesYou-qi chuyun, 2021
The long-distance oil & gas pipelines run through areas with various complicated geological conditions and often face the threats of geological hazards.
Ning GAO   +5 more
doaj   +1 more source

Effects of Some Geometric Parameters in Energy-Efficient Heat Distribution of Pre-Insulated Double Pipes

open access: yesProceedings, 2018
In the case of a computational example, a few aspects of the twin pipe geometry are presented, which have an effect on heat losses through double heating ducts.
Dorota Anna Krawczyk   +1 more
doaj   +1 more source

Reduction of Heat Losses Using Quadruple Heating Pre-Insulated Networks: A Case Study [PDF]

open access: yes, 2019
The paper presents an analysis of heat loss and reductions of annual emissions of air pollutants of a quadruple pre-insulated heating network by comparing this solution with the existing pre-insulated network consisting of four pre-insulated single pipes
Krawczyk, Dorota Anna   +2 more
core   +1 more source

Optimization of Geometric Parameters of Thermal Insulation of Pre-Insulated Double Pipes

open access: yesEnergies, 2019
This paper presents the analysis of the heat conduction of pre-insulated double ducts and the optimization of the shape of thermal insulation by applying an elliptical shape.
Dorota Anna Krawczyk   +1 more
doaj   +1 more source

Pendidikan teknik dan vokasional di kalangan masyarakat orang asli [PDF]

open access: yes, 2007
Masyarakat Orang Asli adalah golongan unik yang mempunyai pelbagai fahaman dan cara hidup yang berbeza-beza berbanding masyarakat lain di Malaysia. Penguasaan di dalam bidang Pendidikan Teknik dan Vokasional (PTV) akan dapat membantu mereka untuk terus ...
Ahmad Sapawi, Arman
core   +1 more source

A Similarity Model of Specific Heat Loss Determined by Dimensional Analysis

open access: yesApplied Sciences, 2023
This article describes an innovative method for the determination of heat flow (specific heat loss; linear heat flow density) from a one-metre length of a twin pipe directly-buried heat network.
Mária Čarnogurská   +5 more
doaj   +1 more source

The Influence of geometrical and operational parameters on internal flow characteristics of Internally Mixing Twin-Fluid Y-Jet Atomizers [PDF]

open access: yes, 2019
Internally mixing twin-fluid Y-jet atomizers are widely used in coal fired thermal power plants for start-up, oil-fired thermal power plants and industrial boilers.
Ehmann, M.   +3 more
core   +1 more source

Reduction of Heat Losses in a Pre-Insulated Network Located in Central Poland by Lowering the Operating Temperature of the Water and the Use of Egg-shaped Thermal Insulation: A Case Study

open access: yesEnergies, 2019
This paper presents possible variants of reducing the heat loss in an existing heating network made from single pre-insulated pipes located in central Europe.
Dorota Anna Krawczyk   +1 more
doaj   +1 more source

Brick polytopes, lattice quotients, and Hopf algebras [PDF]

open access: yes, 2017
This paper is motivated by the interplay between the Tamari lattice, J.-L. Loday's realization of the associahedron, and J.-L. Loday and M. Ronco's Hopf algebra on binary trees.
Pilaud, Vincent
core   +4 more sources

Heat energy from a shallow geothermal system in Glasgow, UK: performance evaluation design [PDF]

open access: yes, 2020
This study reports on the actual energy and economic performances of a water source heat pump recently installed and operated at a Glasgow Subway station in the UK using subsurface water ingress to provide heating and domestic hot water.
Aaen, Bjorn   +3 more
core   +1 more source

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