Summaries.pdf
... It is determined experimentally using Newton’s law of cooling (1.9). Table 1.1 gives typical values for h. Use this table as a guide only. 1.8 Radiation: Stefan-Boltzmann Law Emissivity : radiation surface property Absorptivity : surface property defined as the fraction of radiation energy incident ...
... It is determined experimentally using Newton’s law of cooling (1.9). Table 1.1 gives typical values for h. Use this table as a guide only. 1.8 Radiation: Stefan-Boltzmann Law Emissivity : radiation surface property Absorptivity : surface property defined as the fraction of radiation energy incident ...
Aalborg Universitet Cooling of the Building Structure by Night-time Ventilation Artmann, Nikolai
... In modern, extensively glazed office buildings, due to high solar and internal loads and increased comfort expectations, air conditioning is increasingly applied even in moderate and cold climates, like in Central and Northern Europe. Particularly in these cases, night-time ventilation is often seen ...
... In modern, extensively glazed office buildings, due to high solar and internal loads and increased comfort expectations, air conditioning is increasingly applied even in moderate and cold climates, like in Central and Northern Europe. Particularly in these cases, night-time ventilation is often seen ...
ARMATHERM™ Minimize building energy loss and improve
... U values of wall assemblies. Typically this is done by weighting the heat flow through the materials by the area they take up. Using the physical area of a thermal bridge assumes the heat flow paths through a detail are one dimensional and parallel. However, highly conductive building materials crea ...
... U values of wall assemblies. Typically this is done by weighting the heat flow through the materials by the area they take up. Using the physical area of a thermal bridge assumes the heat flow paths through a detail are one dimensional and parallel. However, highly conductive building materials crea ...
J088
... equation for subcooled flow boiling within 10%. Their correlation indicated a strong dependence on mass flux. Zhang et al. 关39兴 reviewed the available CHF correlations for the saturated region by Bowring 关40兴, Katto 关41兴, Katto and Ohno 关31兴, and Shah 关42兴 and for the subcooled region by Tong 关43兴, ...
... equation for subcooled flow boiling within 10%. Their correlation indicated a strong dependence on mass flux. Zhang et al. 关39兴 reviewed the available CHF correlations for the saturated region by Bowring 关40兴, Katto 关41兴, Katto and Ohno 关31兴, and Shah 关42兴 and for the subcooled region by Tong 关43兴, ...
Experimental Investigation of the Fluid Temperature Field and the
... It is anticipated that from 2010 to 2030, world primary energy demand will increase at a rate of 1.7 % per annum [1]. Despite the harmful emissions from the burning of fossil fuels, the reliance of fossil fuels to meet the global energy demand will continue over the next few decades. It has been pre ...
... It is anticipated that from 2010 to 2030, world primary energy demand will increase at a rate of 1.7 % per annum [1]. Despite the harmful emissions from the burning of fossil fuels, the reliance of fossil fuels to meet the global energy demand will continue over the next few decades. It has been pre ...
A comparison of laboratory and in situ methods to determine soil
... the top using aluminium foil to prevent moisture from leaving the top of the sample. Shavings taken from the bottom of the top half were used to determine the initial moisture content at the bottom. Insulation was wrapped around the specimen. The temperature difference across the specimen was measur ...
... the top using aluminium foil to prevent moisture from leaving the top of the sample. Shavings taken from the bottom of the top half were used to determine the initial moisture content at the bottom. Insulation was wrapped around the specimen. The temperature difference across the specimen was measur ...
INFLUENCE OF PLATE TECTONICS ON LOCATIONS OF
... which terminates the plumbing system. Such an arrangement will lead to higher heat flow in the vicinity of the transform fault and may explain the locations of the geothermal fields Southern California - Northern Mexico area at diverging plate boundaries. Acharya and Spulber found that besides nearn ...
... which terminates the plumbing system. Such an arrangement will lead to higher heat flow in the vicinity of the transform fault and may explain the locations of the geothermal fields Southern California - Northern Mexico area at diverging plate boundaries. Acharya and Spulber found that besides nearn ...
Simulation of Fluid Flow and Heat Transfer in Inclined Cavity using
... been considered extensively, because of its wide applications in manufacturing of solar collectors and heat exchangers, or designing of cooling systems of electronic devices. Among them, mixed convection in a cavity with moving top lid has attracted more attention to be investigated.Most investigati ...
... been considered extensively, because of its wide applications in manufacturing of solar collectors and heat exchangers, or designing of cooling systems of electronic devices. Among them, mixed convection in a cavity with moving top lid has attracted more attention to be investigated.Most investigati ...
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 ...
Thermodynamics
... the properties of the matter are considered as continuous functions of space variables. Although any matter is composed of several molecules, the concept of continuum assumes a continuous distribution of mass within the matter or system with no empty space, instead of the actual conglomeration of se ...
... the properties of the matter are considered as continuous functions of space variables. Although any matter is composed of several molecules, the concept of continuum assumes a continuous distribution of mass within the matter or system with no empty space, instead of the actual conglomeration of se ...
HEATING SYSTEM FOR A PASSIVE HOUSE IN FINLAND Tatiana Dzhigit
... m – maintenance costs, € ce – the price of the electricity, € pe – the price of energy consumed, c/kWh ηa.hp – annual efficiency of ground source heat pump cps – the price of the pellet stove, € che – the price of water-to-air heat exchanger, € cfuel – cost of the fuel during one year, that can be c ...
... m – maintenance costs, € ce – the price of the electricity, € pe – the price of energy consumed, c/kWh ηa.hp – annual efficiency of ground source heat pump cps – the price of the pellet stove, € che – the price of water-to-air heat exchanger, € cfuel – cost of the fuel during one year, that can be c ...
Capture of Heat Energy from Diesel Engine Exhaust
... performance and maintenance requirements. From measurements, it was determined that the amount of heat recovered from the system was about 50% of the heat energy contained in the exhaust (heat contained in exhaust was evaluated based on environment temperature). The estimated payback time for 100% u ...
... performance and maintenance requirements. From measurements, it was determined that the amount of heat recovered from the system was about 50% of the heat energy contained in the exhaust (heat contained in exhaust was evaluated based on environment temperature). The estimated payback time for 100% u ...
Chapter 40 - Basic Principles of Animal Form and Function
... ! The arrangement of blood vessels in many marine mammals and birds allows for countercurrent ...
... ! The arrangement of blood vessels in many marine mammals and birds allows for countercurrent ...
- Wiley Online Library
... Figure 1. Summary of observations near the junction between Japan and Kurile et al., 2009]. Application of the same arcs based on Figure 1 of van Keken et al. [2012]. Thick black line shows the locatechnique to 10 subduction zones tion of Japan and Kurile trench. Thin black lines are the contours of ...
... Figure 1. Summary of observations near the junction between Japan and Kurile et al., 2009]. Application of the same arcs based on Figure 1 of van Keken et al. [2012]. Thick black line shows the locatechnique to 10 subduction zones tion of Japan and Kurile trench. Thin black lines are the contours of ...
Multiphysics Design Optimization Model for Structural Walls
... change materials (PCMs) in building elements this energy cost can be greatly reduced. The addition of PCMs into building elements, however, becomes a challenge to model and analyze how the material actually affects the energy flow and temperatures in the system. This research work presents a compreh ...
... change materials (PCMs) in building elements this energy cost can be greatly reduced. The addition of PCMs into building elements, however, becomes a challenge to model and analyze how the material actually affects the energy flow and temperatures in the system. This research work presents a compreh ...
Prediction and Measurement of Residual Elastic Strain Distributions
... 37), modified the previous 3-D thermalmechanical analysis by Goldak to include transformation plasticity. A number of calculations were performed to show the effect of incorporating phase change effects on the residual stress distribution. However, well-controlled experimental data was not available ...
... 37), modified the previous 3-D thermalmechanical analysis by Goldak to include transformation plasticity. A number of calculations were performed to show the effect of incorporating phase change effects on the residual stress distribution. However, well-controlled experimental data was not available ...
Forced convection heat transfer from an elliptical cylinder to power
... the two commonly used thermal boundary conditions (i.e., isothermal and isoflux) on the surface of the cylinder. These numerical results have been correlated using simple predictive expressions to permit an easy estimation of the value of the average heat transfer coefficient for a cylinder immersed in ...
... the two commonly used thermal boundary conditions (i.e., isothermal and isoflux) on the surface of the cylinder. These numerical results have been correlated using simple predictive expressions to permit an easy estimation of the value of the average heat transfer coefficient for a cylinder immersed in ...
The Application of Thermal Imaging as a Nondestructive Test in
... construction. Also exterior investigations should be planed for an appropriate time after sunset, before sunrise, or on an overcast day when the influence of solar radiation can be determined to be minimal. Standards suggest that wind speed should be less than 3.6 m/s.11 It is necessary to mention t ...
... construction. Also exterior investigations should be planed for an appropriate time after sunset, before sunrise, or on an overcast day when the influence of solar radiation can be determined to be minimal. Standards suggest that wind speed should be less than 3.6 m/s.11 It is necessary to mention t ...
Numerical and experimental investigations of the effective thermal
... temperature gradient ( T) and the heat flux (F) through the Fourier’s law (F = −k T), is thus challenging because conductive and nonconductive processes both contribute to heat transfer through snow. From experimental relationships between T and F, many investigators have derived an apparent thermal ...
... temperature gradient ( T) and the heat flux (F) through the Fourier’s law (F = −k T), is thus challenging because conductive and nonconductive processes both contribute to heat transfer through snow. From experimental relationships between T and F, many investigators have derived an apparent thermal ...
THERMAL INVESTIGATION ON CONDUCTIVE SILVER INK
... ink track. The derived dynamic key physical properties used in the model are also given in figures 9 - 11. It can be seen in figure 8 that the rate of temperature change is lower in first few passes, as solvent is still being evaporated from the ink, which increases the track’s thermal conductivity. ...
... ink track. The derived dynamic key physical properties used in the model are also given in figures 9 - 11. It can be seen in figure 8 that the rate of temperature change is lower in first few passes, as solvent is still being evaporated from the ink, which increases the track’s thermal conductivity. ...
Fluid flow and heat transfer across a circular cylinder in
... number of the primary instability was determined as Re = 46.7. Recently, Rajani et al. (2008) have studied numerically the laminar flow past a circular cylinder for Re = 100 to 400. An implicit pressure-based finite volume method was used here. The temporal evolution of the lift and drag coefficient ...
... number of the primary instability was determined as Re = 46.7. Recently, Rajani et al. (2008) have studied numerically the laminar flow past a circular cylinder for Re = 100 to 400. An implicit pressure-based finite volume method was used here. The temporal evolution of the lift and drag coefficient ...
Are Classical Black Holes Hot or Cold?
... able to or indeed always being required to find an underlying statistical interpretation of those thermodynamical characteristics. That the laws of black hole mechanics follow from the fundamental theory itself (in this case, general relativity), and are not as with classical thermodynamics an indep ...
... able to or indeed always being required to find an underlying statistical interpretation of those thermodynamical characteristics. That the laws of black hole mechanics follow from the fundamental theory itself (in this case, general relativity), and are not as with classical thermodynamics an indep ...
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 ...
An evaluation of the nature and timing of summer human thermal
... of limitations. Perhaps the major limitation is that skin temperature and evaporative heat loss are constrained to values for comfort at a given activity level. The PMV equation also only applies to sedentary subjects exposed to steady-state conditions for a long period at a constant metabolic rate, ...
... of limitations. Perhaps the major limitation is that skin temperature and evaporative heat loss are constrained to values for comfort at a given activity level. The PMV equation also only applies to sedentary subjects exposed to steady-state conditions for a long period at a constant metabolic rate, ...
Hyperthermia
Hyperthermia is elevated body temperature due to failed thermoregulation that occurs when a body produces or absorbs more heat than it dissipates. Extreme temperature elevation then becomes a medical emergency requiring immediate treatment to prevent disability or death.The most common causes include heat stroke and adverse reactions to drugs. The former is an acute temperature elevation caused by exposure to excessive heat, or combination of heat and humidity, that overwhelms the heat-regulating mechanisms. The latter is a relatively rare side effect of many drugs, particularly those that affect the central nervous system. Malignant hyperthermia is a rare complication of some types of general anesthesia.Hyperthermia differs from fever in that the body's temperature set point remains unchanged. The opposite is hypothermia, which occurs when the temperature drops below that required to maintain normal metabolism.