Natural Ventilation of Tall Buildings – Options and Limitations
... impose limits on the width to height ratio of the building. It is commonly assumed that crossflow ventilation of a space is only effective for W/h < 5, where W and h are respectively the width and height of the space. If W/h is too large, some areas of the space may be poorly ventilated, by virtue o ...
... impose limits on the width to height ratio of the building. It is commonly assumed that crossflow ventilation of a space is only effective for W/h < 5, where W and h are respectively the width and height of the space. If W/h is too large, some areas of the space may be poorly ventilated, by virtue o ...
Heat Loss Calculations And Principles
... evening or early morning to stay comfortable. On a very cold day, a lot of heat will be needed all day and all night. A day’s average temperature gives some idea of how much heat will be needed on that day. Climatologists use a measurement known as heating degree-days (HDDs) to estimate heating need ...
... evening or early morning to stay comfortable. On a very cold day, a lot of heat will be needed all day and all night. A day’s average temperature gives some idea of how much heat will be needed on that day. Climatologists use a measurement known as heating degree-days (HDDs) to estimate heating need ...
Aalborg Universitet ventilation systems
... the present study was to investigate whether there is an association between ventilation in daycare centres and sick leave among children due to infectious disease. Data on child sick leave within an 11 week period was obtained for 1206 children attending 20 DCCs. Ventilation measurements included t ...
... the present study was to investigate whether there is an association between ventilation in daycare centres and sick leave among children due to infectious disease. Data on child sick leave within an 11 week period was obtained for 1206 children attending 20 DCCs. Ventilation measurements included t ...
a study of sensing heat flow through thermal walls
... The experimental studies in the research of [4] are performed to show the viability of the heat flow detection by using the thermoelectric modules. In fact, the heat flow is detected by observing the electric voltage of the thermoelectric module. This principle can be applied properly in the case th ...
... The experimental studies in the research of [4] are performed to show the viability of the heat flow detection by using the thermoelectric modules. In fact, the heat flow is detected by observing the electric voltage of the thermoelectric module. This principle can be applied properly in the case th ...
PROCEEDINGS Editors: Marcel Loomans, Eindhoven University of Technology Marije te Kulve, Maastricht University
... the present study was to investigate whether there is an association between ventilation in daycare centres and sick leave among children due to infectious disease. Data on child sick leave within an 11 week period was obtained for 1206 children attending 20 DCCs. Ventilation measurements included t ...
... the present study was to investigate whether there is an association between ventilation in daycare centres and sick leave among children due to infectious disease. Data on child sick leave within an 11 week period was obtained for 1206 children attending 20 DCCs. Ventilation measurements included t ...
International - Ron Blank and Associates, Inc.
... Layers of aluminum or a low emittance material and enclosed air spaces, which in turn provide highly reflective or low emittance cavities adjacent to a heated region, typically form a reflective insulation system. Some reflective insulation systems also use other layers of materials such as paper or ...
... Layers of aluminum or a low emittance material and enclosed air spaces, which in turn provide highly reflective or low emittance cavities adjacent to a heated region, typically form a reflective insulation system. Some reflective insulation systems also use other layers of materials such as paper or ...
Simulation of the influence of preheating on stress - Purdue e-Pubs
... numeric simulation is not only efficiency and low scrap rate, but also could gain some important data which could not be got by experiments. So carrying out the simulation of residual stress of repair welding of cast steel, and studying the influence of preheating, slow cooling, controlling of inter ...
... numeric simulation is not only efficiency and low scrap rate, but also could gain some important data which could not be got by experiments. So carrying out the simulation of residual stress of repair welding of cast steel, and studying the influence of preheating, slow cooling, controlling of inter ...
ApacheSim Calculation Methods - Integrated Environmental Solutions
... establish a model of heat conduction that is discretised in both space and time. To improve accuracy and stability a combination of explicit and implicit timestepping is often used. The Crank-Nicholson semi-implicit method is an example of such a scheme. Another is the ‘hopscotch’ method, which appl ...
... establish a model of heat conduction that is discretised in both space and time. To improve accuracy and stability a combination of explicit and implicit timestepping is often used. The Crank-Nicholson semi-implicit method is an example of such a scheme. Another is the ‘hopscotch’ method, which appl ...
REVIEW ARTICLES AAEM
... Evaporation. The most important mode of cooling during times of environmental heat stress is evaporative. Approximately 580 kcal are lost for each liter of sweat evaporated from the body surface. The head and upper body are responsible for the majority of evaporative loss, thus wearing a hat and shi ...
... Evaporation. The most important mode of cooling during times of environmental heat stress is evaporative. Approximately 580 kcal are lost for each liter of sweat evaporated from the body surface. The head and upper body are responsible for the majority of evaporative loss, thus wearing a hat and shi ...
Rayleigh-Bénard and Bénard-Marangoni convection in a thin
... To estimate the success of the In-Vessel Retention (IVR) strategy an accurate evaluation of the heat fluxes of the corium pool in the lower head of the vessel is needed. Due to the ablation of the vessel wall and to thermochemical effects, a thin metallic layer may be on top of the corium pool and m ...
... To estimate the success of the In-Vessel Retention (IVR) strategy an accurate evaluation of the heat fluxes of the corium pool in the lower head of the vessel is needed. Due to the ablation of the vessel wall and to thermochemical effects, a thin metallic layer may be on top of the corium pool and m ...
J142
... It is important to point out that other fluid thermophysical properties such as density, thermal conductivity, and specific heat may be regarded as constant, since their variation for the fluid temperature range of the present investigation (303–323 K) is 0.8%, 4%, and 0.05%, respectively, based on ...
... It is important to point out that other fluid thermophysical properties such as density, thermal conductivity, and specific heat may be regarded as constant, since their variation for the fluid temperature range of the present investigation (303–323 K) is 0.8%, 4%, and 0.05%, respectively, based on ...
Insulation – Improving the Thermal Envelope - Strunk
... Air Sealing: Air sealing is important, not only because drafts are uncomfortable, but because air leaks carry both moisture and energy, usually in the direction you do not want. For example, air leaks can carry hot, humid outdoor air into your house in the summer, or can carry warm moist air from a ...
... Air Sealing: Air sealing is important, not only because drafts are uncomfortable, but because air leaks carry both moisture and energy, usually in the direction you do not want. For example, air leaks can carry hot, humid outdoor air into your house in the summer, or can carry warm moist air from a ...
Enhanced Thermoelectric Figure-of-Merit in
... which can play an important role in determining the lattice constant of STO. It has been reported by Luo et al.28 that the Ti−Ti bond is larger than Ti−O−Ti and this effect leads to a tetragonal distortion of the lattice and results in a larger lattice constant. Furthermore, it may be noted that crea ...
... which can play an important role in determining the lattice constant of STO. It has been reported by Luo et al.28 that the Ti−Ti bond is larger than Ti−O−Ti and this effect leads to a tetragonal distortion of the lattice and results in a larger lattice constant. Furthermore, it may be noted that crea ...
Natural Ventilation Engineering Guide
... ISO 7730 (ISO, 2005) provide relatively stringent PMV and PPD targets for the acceptable conditions within the occupied space. These thermal comfort models, due to their analytical nature, do not capture the psychological influences that can have a significant effect on the occupants' perceived comf ...
... ISO 7730 (ISO, 2005) provide relatively stringent PMV and PPD targets for the acceptable conditions within the occupied space. These thermal comfort models, due to their analytical nature, do not capture the psychological influences that can have a significant effect on the occupants' perceived comf ...
18 The First Law of Thermodynamics
... internal energy stored in ordinary matter on a microscopic (and hence invisible) scale. It also involves an examination of the role that temperature plays in determining whether a system’s internal energy will increase or decrease when it comes into contact with another system. But, when hot steam i ...
... internal energy stored in ordinary matter on a microscopic (and hence invisible) scale. It also involves an examination of the role that temperature plays in determining whether a system’s internal energy will increase or decrease when it comes into contact with another system. But, when hot steam i ...
Overheating in new homes
... areas[6]. Due to the UHI effect and the unique microclimate generated by cities, and changes in dwelling design, more people may be affected by adverse health outcomes from rising temperatures. Population demographics are also changing globally, and particularly within the UK. As the UK population a ...
... areas[6]. Due to the UHI effect and the unique microclimate generated by cities, and changes in dwelling design, more people may be affected by adverse health outcomes from rising temperatures. Population demographics are also changing globally, and particularly within the UK. As the UK population a ...
A Comprehensive Review of Radiant Barrier
... received and are essential in the study of radiant barriers, they present some drawbacks. One of the shortcomings of laboratory tests is that outdoor (i.e., weather-like) conditions are not entirely reproduced in a laboratory setting. Most laboratory experiments are carried out under steady-state co ...
... received and are essential in the study of radiant barriers, they present some drawbacks. One of the shortcomings of laboratory tests is that outdoor (i.e., weather-like) conditions are not entirely reproduced in a laboratory setting. Most laboratory experiments are carried out under steady-state co ...
POLYMORPHISM (AS A PART OF PREFORMULATION STUDY)
... But solubility of metastable form may never reach to theoretical solubility due to crystallization of most stable form so data may not be consistent if we use above equation. Dissolution behavior of the polymorphs:-the absorption rate and bioavailability of drug administered orally is controlled by ...
... But solubility of metastable form may never reach to theoretical solubility due to crystallization of most stable form so data may not be consistent if we use above equation. Dissolution behavior of the polymorphs:-the absorption rate and bioavailability of drug administered orally is controlled by ...
Refrigeration And Air Conditioning
... Up to this point we have considered fossil-fueled heat engines that are currently in use. These devices have provided society's answers to the thermodynamic question: How can the chemical energy of fossil fuels be converted into mechanical work and motive power? Let us now turn our attention to the ...
... Up to this point we have considered fossil-fueled heat engines that are currently in use. These devices have provided society's answers to the thermodynamic question: How can the chemical energy of fossil fuels be converted into mechanical work and motive power? Let us now turn our attention to the ...
Mantle Lithosphere Heat Flow Page 1 of 43 In
... found to produce reproducible results under a variety of different confining pressures and stack configurations. As many of the experimental runs above 500oC resulted in fractured standards in the stack, we are only confident in the results from these runs as semi-quantitative. However, within indiv ...
... found to produce reproducible results under a variety of different confining pressures and stack configurations. As many of the experimental runs above 500oC resulted in fractured standards in the stack, we are only confident in the results from these runs as semi-quantitative. However, within indiv ...
Dose uniformity of ferromagnetic seed implants in tissue with
... (viii) Multifilament PdNi seed (3) inserted in a plastic catheter filled up with water: this implant is similar to the previous one, but the catheter is filled up with water to reduce the influence of the intermediate air layer. (ix) Multifilament PdNi seed (4) inserted in a metallic needle: the cat ...
... (viii) Multifilament PdNi seed (3) inserted in a plastic catheter filled up with water: this implant is similar to the previous one, but the catheter is filled up with water to reduce the influence of the intermediate air layer. (ix) Multifilament PdNi seed (4) inserted in a metallic needle: the cat ...
Slide 1
... Equilibrium and Thermometers (cont.) • When the cold glass tube of the thermometer touches your skin, which is warmer than the glass, the faster-moving particles in your skin collide with the slower-moving particles in the glass. • Energy is then transferred from your skin to the glass particles by ...
... Equilibrium and Thermometers (cont.) • When the cold glass tube of the thermometer touches your skin, which is warmer than the glass, the faster-moving particles in your skin collide with the slower-moving particles in the glass. • Energy is then transferred from your skin to the glass particles by ...
6. Macroscopic equilibrium states and state variables (Hiroshi
... temperature scale,” which was later found to coincide with the absolute scale. Extending the concept of equilibrium state to include mechanical equilibrium In the above, we first defined the notion of equilibrium state for “isolated” systems, which cannot exchange energy with another system and whos ...
... temperature scale,” which was later found to coincide with the absolute scale. Extending the concept of equilibrium state to include mechanical equilibrium In the above, we first defined the notion of equilibrium state for “isolated” systems, which cannot exchange energy with another system and whos ...
A Novel Computational Approach to Combine the Optical and Thermal
... efficiency of such a receiver. A Linear Fresnel Collector (LFC) implementation is used to illustrate the approach. It is shown that the Discrete Ordinates method can provide an accurate solution to the Radiative Transfer Equation (RTE) if the shortcomings of its solution are resolved appropriately i ...
... efficiency of such a receiver. A Linear Fresnel Collector (LFC) implementation is used to illustrate the approach. It is shown that the Discrete Ordinates method can provide an accurate solution to the Radiative Transfer Equation (RTE) if the shortcomings of its solution are resolved appropriately i ...
Selecting Die Attach Technology for High-Power
... Because of the highly ductile nature of Pb90 Sn10 , it minimizes the transfer of TCE stress between die and substrate during temperature excursions. This allows bonding of very large die without the risk of cracking. It also has 80% of the thermal conductivity of AuSn but costs 100 times less per we ...
... Because of the highly ductile nature of Pb90 Sn10 , it minimizes the transfer of TCE stress between die and substrate during temperature excursions. This allows bonding of very large die without the risk of cracking. It also has 80% of the thermal conductivity of AuSn but costs 100 times less per we ...