Results 11 to 20 of about 394,113 (181)

Pressure Pump Power Control in the Primary Circuit of the Heat Exchange System [PDF]

open access: yesMATEC Web of Conferences, 2017
In this paper we consider the problem of speed in hot water systems where highly efficient plate heat exchanger is used. Especially marked the problem which is connected with long transition drive of constant speed exceeding the time of the heat ...
Shilin Aleksandr   +2 more
doaj   +4 more sources

Наближена оцінка температурного стану керамічного ядерного палива в циліндричних твелах та впливу на нього процесів і параметрів конструкцій активної зони реактора [PDF]

open access: yes, 2008
The approximate mathematical model of the temperature state of ceramic nuclear fuels in cylindrical fuel elements was proposed in the form of linear ordinary differential equation and the boundary conditions. The theory of heat conduction and assumptions
Chibisov, Dmytro, Romashov, Yury
core   +2 more sources

A numerical study on heat transfer performances of horizontal ground heat exchangers in ground-source heat pumps.

open access: yesPLoS ONE, 2021
Horizontal ground heat exchangers (HGHEs) have advantages such as convenient construction and low cost; however, their application and popularization are restricted owing to traditional linear HGHEs occupying large space and presenting low total heat ...
Hang Zou   +3 more
doaj   +1 more source

Influence of an inclined magnetic field and heat and mass transfer on the peristaltic flow of blood in an asymmetric channel

open access: yesScientific Reports, 2023
This article presents a theoretical study on heat and mass transfer analysis of the peristaltic flow of blood conveying through an asymmetric channel in the presence of inclined to the magnetic field.
M. A. Abdelhafez   +3 more
doaj   +1 more source

CFD simulations of heat transfer in internally helically ribbed tubes

open access: yesChemical and Process Engineering, 2016
Heating surfaces in power boilers are exposed to very high heat flux. For evaporator protection against overheating, internally helically ribbed tubes are used.
Majewski Karol, Grądziel Sławomir
doaj   +1 more source

Effects of radiation and heat source on MHD flow of a viscoelastic liquid and heat transfer over a stretching sheet [PDF]

open access: yes, 2005
We study the MHD flow and also heat transfer in a viscoelastic liquid over a stretching sheet in the presence of radiation. The stretching of the sheet is assumed to be proportional to the distance from the slit.
Mahabaleswar, U.S., Siddheshwar, P.G.
core   +1 more source

Optimization on heat-transfer coefficient of plate heat exchanger using MWCNT-TiO2 nanofluid by response surface methodology

open access: yesMaterials Research Express, 2020
In this present study, MWCNT-TiO _2 hybrid nanocomposite synthesized by solvothermal synthesis method with TiCl _4 as a precursor. Then the hybrid nanocomposite based nanofluid produced using base fluid water/Ethylene-glycol (50:50).
Abdullah Saleh Alqahtani   +2 more
doaj   +1 more source

Investigation of heat transfer properties of granular activated carbon with R723 for adsorption refrigeration and heat pump [PDF]

open access: yes, 2019
This paper investigates the heat transfer coefficient of the wall to packed carbon contact (h) and the thermal conductivity of the packed bed (λ) by using parameters estimation method.
Khaliji Oskouei, Mohammadhasan   +1 more
core   +1 more source

Prediction of Thermo-Physical Properties of TiO2-Al2O3/Water Nanoparticles by Using Artificial Neural Network [PDF]

open access: yes, 2020
In this paper, an artificial neural network is implemented for the sake of predicting the thermal conductivity ratio of TiO2-Al2O3/water nanofluid. TiO2-Al2O3/water in the role of an innovative type of nanofluid was synthesized by the sol–gel method. The
Ahmadi, Mohammad Hossein   +6 more
core   +2 more sources

Solution of heat and mass transfer problems with non-linear coefficients

open access: yesTyumen State University Herald. Physical and Mathematical Modeling. Oil, Gas, Energy, 2019
Equations, which have nonlinear nonmonotonic dependence of one of the coefficients on an unknown function, can describe processes of heat and mass transfer. As a rule, existing approximate methods do not provide solutions with acceptable accuracy. Numerical methods do not involve obtaining an analytical expression for the unknown function and require ...
Boris G. Aksenov   +2 more
openaire   +1 more source

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