2002 Lyman ETFS
... were met. The most important of those objectives was to gain an understanding of the flow and thermal field effects on the louver heat transfer. In particular, the question that will be addressed is whether the heat transfer coefficients can be collapsed to a single curve for a louvered fin consider ...
... were met. The most important of those objectives was to gain an understanding of the flow and thermal field effects on the louver heat transfer. In particular, the question that will be addressed is whether the heat transfer coefficients can be collapsed to a single curve for a louvered fin consider ...
Local Heat Transfer Coefficients Measured with Temperature
... method relies on IR thermography to measure the heat transferring wall’s temperature response to an oscillating heat flux for the calculation of the heat transfer coefficients. The heat flux is generated by periodically modulated laser or halogen light radiation. The IR image data is processed to ob ...
... method relies on IR thermography to measure the heat transferring wall’s temperature response to an oscillating heat flux for the calculation of the heat transfer coefficients. The heat flux is generated by periodically modulated laser or halogen light radiation. The IR image data is processed to ob ...
Chapter 2 Kiln Types and Features
... Steam has long been the most widely used heating medium for kiln drying of lumber. Steam is moved from the boiler into the kiln by pipes, and the heat is then transferred to the circulating air in the kiln. Historically, many lumber processing operations required steam for a variety of applications, ...
... Steam has long been the most widely used heating medium for kiln drying of lumber. Steam is moved from the boiler into the kiln by pipes, and the heat is then transferred to the circulating air in the kiln. Historically, many lumber processing operations required steam for a variety of applications, ...
2004 Lethander AIAA
... Many of the past studies on secondary flow effects have focused on the aerodynamic penalties resulting in total pressure losses through a stage. Arguably as important, however, are the thermal penalties resulting in reduced airfoil life. This is particularly true because increased turbine inlet temp ...
... Many of the past studies on secondary flow effects have focused on the aerodynamic penalties resulting in total pressure losses through a stage. Arguably as important, however, are the thermal penalties resulting in reduced airfoil life. This is particularly true because increased turbine inlet temp ...
Capture of Heat Energy from Diesel Engine Exhaust
... exhaust (heat contained in exhaust was evaluated based on environment temperature). The estimated payback time for 100% use of recovered heat would be less than 3 years at a fuel price of $3.50 per gallon, an interest rate of 10%, and an engine operation of 8 hours per day. Based on experimental dat ...
... exhaust (heat contained in exhaust was evaluated based on environment temperature). The estimated payback time for 100% use of recovered heat would be less than 3 years at a fuel price of $3.50 per gallon, an interest rate of 10%, and an engine operation of 8 hours per day. Based on experimental dat ...
Heat transfer and pressure drop of refrigerant R404A at near
... journey. Without him, my life would have been totally different. ...
... journey. Without him, my life would have been totally different. ...
C142
... As the scale of devices becomes small, thermal control and heat dissipation from these devices can be effectively accomplished through the implementation of microchannel passages. The small passages provide a high surface area to volume ratio that enables higher heat transfer rates. High performance ...
... As the scale of devices becomes small, thermal control and heat dissipation from these devices can be effectively accomplished through the implementation of microchannel passages. The small passages provide a high surface area to volume ratio that enables higher heat transfer rates. High performance ...
Numerical Simulation of Residual Stress and Strain
... Welding, among all mechanical joining processes, has been employed at an increasing rate for its advantages in design flexibility. In addition to that, cost savings, reduced overall weight and enhanced structural performance. The highly localized transient heat and strongly nonlinear temperature fie ...
... Welding, among all mechanical joining processes, has been employed at an increasing rate for its advantages in design flexibility. In addition to that, cost savings, reduced overall weight and enhanced structural performance. The highly localized transient heat and strongly nonlinear temperature fie ...
MODEL OF CRITICAL HEAT FLUX IN SUBCOOLED
... effect for tube diameters over most of the high pressure range (735 psia to 2500 psia) with exit conditions varying from high subcooling (AHsub 200 Btu/lbm) to bulk boiling. CHF decreases as L/D is increased to a limiting value (L/D = 10 to 40 [ 5,4]) aboverwhich it has a minor influence; thus L/D i ...
... effect for tube diameters over most of the high pressure range (735 psia to 2500 psia) with exit conditions varying from high subcooling (AHsub 200 Btu/lbm) to bulk boiling. CHF decreases as L/D is increased to a limiting value (L/D = 10 to 40 [ 5,4]) aboverwhich it has a minor influence; thus L/D i ...
Energy performance of buildings — Calculation of energy use for
... Total heat transfer by ventilation.......................................................................................................35 Ventilation heat transfer coefficients ................................................................................................36 Input data and boundar ...
... Total heat transfer by ventilation.......................................................................................................35 Ventilation heat transfer coefficients ................................................................................................36 Input data and boundar ...
Full-Text PDF
... The concept of heat pipes was first described in 1942, but the real development of heat pipes started in the 1960s [1]. Properly designed heat pipes can transport heat at very high rates with a small temperature difference between the cold and the warm end. This is possible because the heat transpor ...
... The concept of heat pipes was first described in 1942, but the real development of heat pipes started in the 1960s [1]. Properly designed heat pipes can transport heat at very high rates with a small temperature difference between the cold and the warm end. This is possible because the heat transpor ...
Review on graphite foam as thermal material for heat exchangers
... blocked by dust, the cold air can not reach all inter - faces and bring away the heat. Thus, the effective heat transfer area is reduced greatly and the thermal performance will decrease too. Due to the operating conditions, the dust block problem is more serious in vehicle radiators than in the ele ...
... blocked by dust, the cold air can not reach all inter - faces and bring away the heat. Thus, the effective heat transfer area is reduced greatly and the thermal performance will decrease too. Due to the operating conditions, the dust block problem is more serious in vehicle radiators than in the ele ...
Abstract
... While the benefits of 3D chip integration are clear, there are several obstacles to its broader implementation. In particular, the issue of power dissipation is a major challenge to the development of high performance 3D chip stacks. ...
... While the benefits of 3D chip integration are clear, there are several obstacles to its broader implementation. In particular, the issue of power dissipation is a major challenge to the development of high performance 3D chip stacks. ...
Aalborg Universitet Cooling of the Building Structure by Night-time Ventilation Artmann, Nikolai
... climatic conditions and hence also to climate warming. In the first part of this PhD study, the potential for passive cooling of buildings by night-time ventilation was evaluated by analysing climatic data, without considering any building-specific parameters. A method for quantifying the climatic c ...
... climatic conditions and hence also to climate warming. In the first part of this PhD study, the potential for passive cooling of buildings by night-time ventilation was evaluated by analysing climatic data, without considering any building-specific parameters. A method for quantifying the climatic c ...
Natural Ventilation Engineering Guide
... summer may be possible. Heating Requirements and Overheating Finally, concerns regarding heating energy use and cold drafts in winter, as well as overheating in summer, can be addressed through appropriate design of a controlled natural ventilation strategy and incorporation of thermal mass and natu ...
... summer may be possible. Heating Requirements and Overheating Finally, concerns regarding heating energy use and cold drafts in winter, as well as overheating in summer, can be addressed through appropriate design of a controlled natural ventilation strategy and incorporation of thermal mass and natu ...
Overheating in new homes
... presented and analysed as case studies. The report also discusses what parameters might be used in the definition of overheating including possible threshold temperature levels. Guidance on the requirements for reducing overheating is also presented and discussed. There is increasing evidence that n ...
... presented and analysed as case studies. The report also discusses what parameters might be used in the definition of overheating including possible threshold temperature levels. Guidance on the requirements for reducing overheating is also presented and discussed. There is increasing evidence that n ...
Apparent Latent Heat of Evaporation from Clothing
... Apparent Latent Heat of Evaporation in Clothing Based on the moisture transport processes in clothing as discussed above, several authors have suggested that the calculation of evaporative heat loss from the clothed mass loss may not always be correct (7, 8, 22, 28, 31). Lotens et al. (28) demonstra ...
... Apparent Latent Heat of Evaporation in Clothing Based on the moisture transport processes in clothing as discussed above, several authors have suggested that the calculation of evaporative heat loss from the clothed mass loss may not always be correct (7, 8, 22, 28, 31). Lotens et al. (28) demonstra ...
Heat pump
... The rearrangement of the connections between four ways of flow— compressor suction, compressor discharge, evaporator outlet, and condenser inlet—causes the functions of the indoor and outdoor coils to reverse. It is also called a four-way reversing valve. ...
... The rearrangement of the connections between four ways of flow— compressor suction, compressor discharge, evaporator outlet, and condenser inlet—causes the functions of the indoor and outdoor coils to reverse. It is also called a four-way reversing valve. ...
The Regulation of Body Temperature
... Cold also can injure tissues. As a water-based solution freezes, ice crystals consisting of pure water form, so that all dissolved substances in the solution are left in the unfrozen liquid. Therefore, as more ice forms, the remaining liquid becomes more and more concentrated. Freezing damages cells ...
... Cold also can injure tissues. As a water-based solution freezes, ice crystals consisting of pure water form, so that all dissolved substances in the solution are left in the unfrozen liquid. Therefore, as more ice forms, the remaining liquid becomes more and more concentrated. Freezing damages cells ...
2011 Hada JT
... The assembly of individual turbine components results in leakage gaps that allow for thermal expansions. The pressure difference between the combustor shell and turbine gas path produce these outflow leakages into the gas path. Gas temperatures are not uniform in the combustor and vane sections, whi ...
... The assembly of individual turbine components results in leakage gaps that allow for thermal expansions. The pressure difference between the combustor shell and turbine gas path produce these outflow leakages into the gas path. Gas temperatures are not uniform in the combustor and vane sections, whi ...
Thermal Fatigue Life Prediction of Solder Joints in Avionics
... School of Engineering, Jönköping University, for always being positive and optimistic, able to supply a boost of energy when most needed. Also, many thanks must be directed to his colleagues, my co-supervisors Dr. Ilja Belov, for continuously reminding me about the importance of being thorough in ev ...
... School of Engineering, Jönköping University, for always being positive and optimistic, able to supply a boost of energy when most needed. Also, many thanks must be directed to his colleagues, my co-supervisors Dr. Ilja Belov, for continuously reminding me about the importance of being thorough in ev ...
Refrigeration and Air- Conditioning
... Assertion (A): The coefficient of performance of a heat pump is greater than that for the refrigerating machine operating between the same temperature limits.[IES-2002; IAS-2002] Reason (R): The refrigerating machine requires more energy for working where as a heat pump requires less. (a)Both A and ...
... Assertion (A): The coefficient of performance of a heat pump is greater than that for the refrigerating machine operating between the same temperature limits.[IES-2002; IAS-2002] Reason (R): The refrigerating machine requires more energy for working where as a heat pump requires less. (a)Both A and ...
the temperature prediction in deepwater drilling
... the ocean current, the oceanography conditions (Chakrabarti 2005). The strong loop ocean currents and induced eddies can pose significant problems for deep-water drilling. Broadly divided ocean currents, surface currents, bottom currents and vertical currents, interact with the deep water drilling s ...
... the ocean current, the oceanography conditions (Chakrabarti 2005). The strong loop ocean currents and induced eddies can pose significant problems for deep-water drilling. Broadly divided ocean currents, surface currents, bottom currents and vertical currents, interact with the deep water drilling s ...
Transient geotherms in Archean continental lithosphere: New
... be in thermal equilibrium with the instantaneous rate of heat production in the lithospheric mantle and heat supplied to its base. Comparison of xenolith (P,T) data with time-dependent thermal models allows constraints on lithosphere thickness, in situ heat production in the lithospheric mantle and ...
... be in thermal equilibrium with the instantaneous rate of heat production in the lithospheric mantle and heat supplied to its base. Comparison of xenolith (P,T) data with time-dependent thermal models allows constraints on lithosphere thickness, in situ heat production in the lithospheric mantle and ...
Evaporators and Condensers
... Evaporators and condensers are sensible heat exchangers in which one of the fluids, the refrigerant, changes phase. They are constructed similar to the sensible heat exchangers described in Chapter 13. An evaporator in a chilled water system would typically be a shell and tube exchanger with refrige ...
... Evaporators and condensers are sensible heat exchangers in which one of the fluids, the refrigerant, changes phase. They are constructed similar to the sensible heat exchangers described in Chapter 13. An evaporator in a chilled water system would typically be a shell and tube exchanger with refrige ...
Radiator (engine cooling)
Radiators are heat exchangers used for cooling internal combustion engines, mainly in automobiles but also in piston-engined aircraft, railway locomotives, motorcycles, stationary generating plant or any similar use of such an engine.Internal combustion engines are often cooled by circulating a liquid called engine coolant through the engine block, where it is heated, then through a radiator where it loses heat to the atmosphere, and then returned to the engine. Engine coolant is usually water-based, but may also be oil. It is common to employ a water pump to force the engine coolant to circulate, and also for an axial fan to force air through the radiator.