Oil Cooling of Electric Motor using CFD
... film thicknesses than the analytical solutions from the fluid film thickness theory. The maximum analytical thickness was of the same order of magnitude as the surface average film thickness provided by the multiphase models. This thickness was assumed to be constant when used as the base for the fl ...
... film thicknesses than the analytical solutions from the fluid film thickness theory. The maximum analytical thickness was of the same order of magnitude as the surface average film thickness provided by the multiphase models. This thickness was assumed to be constant when used as the base for the fl ...
MODEL OF CRITICAL HEAT FLUX IN SUBCOOLED
... flux (CHF) for subcooled flow boiling has been investigated. The first phase of this study established the basic nature of the flow structure at CHF. A photographic study of the flow in a glass annular test section was accomplished by using microflash lighting and a Polaroid camera. The results show ...
... flux (CHF) for subcooled flow boiling has been investigated. The first phase of this study established the basic nature of the flow structure at CHF. A photographic study of the flow in a glass annular test section was accomplished by using microflash lighting and a Polaroid camera. The results show ...
Chapter One :- Concepts and Definitions
... phase changes between solid and liquid or between liquid and vapor to enhance the performance of the system. Consider as a system 1 kg of water contained in the piston/cylinder arrangement shown in Fig. 1a. Suppose that the piston and weight maintain a pressure of 0.1 MPa in the cylinder and that th ...
... phase changes between solid and liquid or between liquid and vapor to enhance the performance of the system. Consider as a system 1 kg of water contained in the piston/cylinder arrangement shown in Fig. 1a. Suppose that the piston and weight maintain a pressure of 0.1 MPa in the cylinder and that th ...
2006 Sanders IJHMT
... Although no studies have been done with vortex generators incorporated on the fins of a louvered fin heat exchanger, several have been done with them on flat plates, in channels, and in other types of heat exchangers. Gentry and Jacobi [8] performed studies with delta wings on a flat plate and in a deve ...
... Although no studies have been done with vortex generators incorporated on the fins of a louvered fin heat exchanger, several have been done with them on flat plates, in channels, and in other types of heat exchangers. Gentry and Jacobi [8] performed studies with delta wings on a flat plate and in a deve ...
MODELING OF ELECTROMAGNETIC, HEAT TRANSFER
... assumption over the entire mushy zone. Oldenburg and Spera sought to account for this drawback by relaxing the packed bed assumption for low solid fraction and substituting a two region model [35]. A homogeneous model was used to describe the flow in the suspended particle region, and the viscosity ...
... assumption over the entire mushy zone. Oldenburg and Spera sought to account for this drawback by relaxing the packed bed assumption for low solid fraction and substituting a two region model [35]. A homogeneous model was used to describe the flow in the suspended particle region, and the viscosity ...
numerical modeling and analytical validation for the movement of
... The hot water byproduct of thermal power plant or the excess heat collected in the solar energy system during periods of bright sunshine thus can be injected and stored underground and extracted in the time of demand. Direct use of groundwater with relatively high volumetric heat capacity makes ATES ...
... The hot water byproduct of thermal power plant or the excess heat collected in the solar energy system during periods of bright sunshine thus can be injected and stored underground and extracted in the time of demand. Direct use of groundwater with relatively high volumetric heat capacity makes ATES ...
Ch 12 - HCC Learning Web
... Two different objects are supplied with equal amounts of heat. The objects could have the same specific heat capacities, but they could have different masses. The objects could have the same masses, but they could have different specific heat capacities. Or, the objects could have both different mas ...
... Two different objects are supplied with equal amounts of heat. The objects could have the same specific heat capacities, but they could have different masses. The objects could have the same masses, but they could have different specific heat capacities. Or, the objects could have both different mas ...
Performance Studies on Sub-cooling of Cryogenic Liquids Used for
... varied. The volume flow rate of helium supply gas is measured by differential pressure transmitter. The heat–inleak of Dewar was calculated from the measured Liquid Nitrogen temperature for ambient condition where Liquid Nitrogen exists at saturated condition (77.36 K at 1.0 bar,a) and the heat in l ...
... varied. The volume flow rate of helium supply gas is measured by differential pressure transmitter. The heat–inleak of Dewar was calculated from the measured Liquid Nitrogen temperature for ambient condition where Liquid Nitrogen exists at saturated condition (77.36 K at 1.0 bar,a) and the heat in l ...
A Device for Measuring Thermal Conductivity of Molten Salt Nitrates
... vaporization temperature in order to influence a phase change to steam which is used to drive a steam turbine and produce electricity. The thermodynamic efficiency of this cycle can be improved through several methods. Ideally, the temperature of the heat transfer fluid is as high as possible during ...
... vaporization temperature in order to influence a phase change to steam which is used to drive a steam turbine and produce electricity. The thermodynamic efficiency of this cycle can be improved through several methods. Ideally, the temperature of the heat transfer fluid is as high as possible during ...
Dynamic insulation
Dynamic insulation is a form of insulation where cool outside air flowing through the thermal insulation in the envelope of a building will pick up heat from the insulation fibres. Buildings can be designed to exploit this to reduce the transmission heat loss (U-value) and to provide pre-warmed, draft free air to interior spaces. This is known as dynamic insulation since the U-value is no longer constant for a given wall or roof construction but varies with the speed of the air flowing through the insulation (climate adaptive building shell). Dynamic insulation is different from breathing walls. The positive aspects of dynamic insulation need to be weighed against the more conventional approach to building design which is to create an airtight envelope and provide appropriate ventilation using either natural ventilation or mechanical ventilation with heat recovery. The air-tight approach to building envelope design, unlike dynamic insulation, results in a building envelope that provides a consistent performance in terms of heat loss and risk of interstitial condensation that is independent of wind speed and direction. Under certain wind conditions a dynamically insulated building can have a higher heat transmission loss than an air-tight building with the same thickness of insulation.