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Главная ICHMT DL Текущий год Архив Исполнительный Комитет ICHMT


Jan Skladzien
Institute of Thermal Technology, The Silesian University of Technology, Gliwice, Poland

Malgorzata Hanuszkiewicz-Drapala
Institute of Thermal Technology, The Silesian University of Technology, Gliwice, Poland

Adam Fic
Institute of Thermal Technology, The Silesian University of Technology, Gliwice, Poland


Heat flow rate transferred from the ground by vertical ground exchangers of heat pump units is analysed in the paper. The investigation of the mentioned heat flow rate, for different arrangements of the exchanger tubes, different values of the temperature of an intermediate medium, different thermal parameters of the ground, and for the different values of seepage velocity, is the main aim of the paper. For this purpose, proper unsteady state temperature distributions in the ground surrounding the ground exchanger have been calculated. The temperature distributions in the ground considered are governed by the standard unsteady heat conduction equation with the convective term in the unfrozen part of the domain, if the seepage is taken into account, and Stefan's boundary condition on the phase change interface. Calculations have been carried out using the home code FEMCONV, if the seepage is considered. The finite element method (FEM) is implemented in this code both to calculate the temperature fields and the velocity fields of moisture. The Darcy's model is assumed to describe the seepage flow in the ground. Due to the existence of phase change on the moving interface, the apparent heat capacity method is applied. Additionally, an original technique is used to avoid remeshing because the seepage flow takes place within the unfrozen part of the computational domain, which changes its shape in the time. PATRAN-THERMAL code has been usually employed to calculate the temperature fields in case the seepage is neglected.

ICHMT Digital Library

Bow shocks on a jet-like solid body shape. Thermal Sciences 2004, 2004. Pulsed, supersonic fuel jets - their characteristics and potential for improved diesel engine injection. PULSED, SUPERSONIC FUEL JETS - THEIR CHARACTERISTICS AND POTENTIAL FOR IMPROVED DIESEL ENGINE INJECTION
View of engine compartment components (left). Plots of temperature distributions in centreplane, forward of engine (right). CHT-04 - Advances in Computational Heat Transfer III, 2004. Devel... DEVELOPMENT AND CURRENT STATUS OF INDUSTRIAL THERMOFLUIDS CFD ANALYSIS
Pratt & Whitney's F-135 Joint Strike Fighter Engine under test in Florida is a 3600F class jet engine. TURBINE-09, 2009. Turbine airfoil leading edge stagnation aerodynamics and heat transfe... TURBINE AIRFOIL LEADING EDGE STAGNATION AERODYNAMICS AND HEAT TRANSFER - A REVIEW
Refractive index reconstructed field. (a) Second iteration. (b) Fourth iteration. Radiative Transfer - VI, 2010. Theoretical development for refractive index reconstruction from a radiative ... THEORETICAL DEVELOPMENT FOR REFRACTIVE INDEX RECONSTRUCTION FROM A RADIATIVE TRANSFER EQUATION-BASED ALGORITHM
Two inclusion test, four collimated sources. Radiative Transfer - VI, 2010. New developments in frequency domain optical tomography. Part II. Application with a L-BFGS associated to an inexa... NEW DEVELOPMENTS IN FREQUENCY DOMAIN OPTICAL TOMOGRAPHY. PART II. APPLICATION WITH A L-BFGS ASSOCIATED TO AN INEXACT LINE SEARCH