C051
... ways. Firstly, it alters the pressure drop characteristics by introducing an acceleration pressure drop component that can be quite large at higher heat fluxes. Secondly, the tube dimension is quite small, and the effect of surface tension forces become more important in defining the two-phase struc ...
... ways. Firstly, it alters the pressure drop characteristics by introducing an acceleration pressure drop component that can be quite large at higher heat fluxes. Secondly, the tube dimension is quite small, and the effect of surface tension forces become more important in defining the two-phase struc ...
Overheating in new homes
... highly insulated and airtight dwellings, in both new build and retrofit. Historically in the UK the use of heavyweight construction materials and limited amounts of thermal insulation, allied with high levels of infiltration through gaps in the building fabric, have contributed to minimise overheati ...
... highly insulated and airtight dwellings, in both new build and retrofit. Historically in the UK the use of heavyweight construction materials and limited amounts of thermal insulation, allied with high levels of infiltration through gaps in the building fabric, have contributed to minimise overheati ...
The Regulation of Body Temperature
... core, now become part of the shell. In addition to the organs in the trunk and head, the core includes a greater or lesser amount of more superficial tissue—mostly skeletal muscle— depending on the body’s thermal state. Because the shell lies between the core and the environment, all heat leaving th ...
... core, now become part of the shell. In addition to the organs in the trunk and head, the core includes a greater or lesser amount of more superficial tissue—mostly skeletal muscle— depending on the body’s thermal state. Because the shell lies between the core and the environment, all heat leaving th ...
Chapter 4
... n Chap. 2, we considered various forms of energy and energy transfer, and we developed a general relation for the conservation of energy principle or energy balance. Then in Chap. 3, we learned how to determine the thermodynamics properties of substances. In this chapter, we apply the energy balance ...
... n Chap. 2, we considered various forms of energy and energy transfer, and we developed a general relation for the conservation of energy principle or energy balance. Then in Chap. 3, we learned how to determine the thermodynamics properties of substances. In this chapter, we apply the energy balance ...
... The effect of lateral power distribution of the MITR LEU fuel design was analyzed using Computational Fluid Dynamics. Coupled conduction and convective heat transfer were modeled for uniform and non-uniform lateral power distributions. It was concluded that, due to conduction, the maximum heat flux ...
226_che.pdf
... and cost effective [5-6]. Theoretical approaches include numerical modeling or analytical derivation. For a complicated problem as the current investigation, the derivation of the thermal performance through an analytical approach is not very practical. This makes numerical modeling more attractive. ...
... and cost effective [5-6]. Theoretical approaches include numerical modeling or analytical derivation. For a complicated problem as the current investigation, the derivation of the thermal performance through an analytical approach is not very practical. This makes numerical modeling more attractive. ...
Terminal Input and Output Devices
... kept under $200 per point to have a chance of being cost effective when compared to other approaches from a purely economic standpoint. This objective can be achieved only if the system designer pays close attention to the selection of input and output devices employed for terminal control. A strong ...
... kept under $200 per point to have a chance of being cost effective when compared to other approaches from a purely economic standpoint. This objective can be achieved only if the system designer pays close attention to the selection of input and output devices employed for terminal control. A strong ...
Institutionen för systemteknik Department of Electrical Engineering
... percent of the fuel becomes brake power and the remaining 60 percent is mainly turned into heat. The heat is called waste heat since it is not used for anything. One way to lower the fuel consumption is to recover energy from the waste heat. The energy may then be put back into the powertrain. That ...
... percent of the fuel becomes brake power and the remaining 60 percent is mainly turned into heat. The heat is called waste heat since it is not used for anything. One way to lower the fuel consumption is to recover energy from the waste heat. The energy may then be put back into the powertrain. That ...
Thermal Analysis of Power Cables in Free Air: Evaluation and
... Transient heat-transfer FEM simulations are performed until the steady state is reached as was done in [9]. All of the finite-element simulations of this paper were performed using the non-isothermal heat-flow module of COMSOL Multiphysics [10]. The steady-state engine of COMSOL does not seem capabl ...
... Transient heat-transfer FEM simulations are performed until the steady state is reached as was done in [9]. All of the finite-element simulations of this paper were performed using the non-isothermal heat-flow module of COMSOL Multiphysics [10]. The steady-state engine of COMSOL does not seem capabl ...
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.