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Thermal Performance - The Canadian Wood Council
Thermal Performance - The Canadian Wood Council

... Source: Canada Mortgage and Housing Corporation ...
Aalborg Universitet IGBT Modules
Aalborg Universitet IGBT Modules

... and can be used for a rough and fast calculation of junction temperature. However, they cannot be used for studying the three dimensional (3D) heat spreading effects to come up with accurate temperatures in different locations. The other group of thermal models is based on analytical solutions to th ...
Investigation of Link between Air Exchange Rate and Operational
Investigation of Link between Air Exchange Rate and Operational

... effects as intended or too large to be cost-effective. Therefore, the links between air exchange rates and the effects of natural ventilation obtained through monitoring existing buildings can provide useful information for determining early stage building design targets. In this study, the operatio ...
Heat Flow Basics, Arch264
Heat Flow Basics, Arch264

... the use of shading and orientation. Good control requires a designer to understand the location of the sun over the day and over different orientations. Shading should be on the EXTERIOR of the glazing unit or it will trap heat in the building. With modern glazings, interior shading should primarily ...
A new Passive House Design Tool and its Application in Cold
A new Passive House Design Tool and its Application in Cold

... For the dynamic hygrothermal simulation a user can switch to the “WUFI Plus” mode once the main passive house criteria are met to a degree. Some input screens change to the dynamic relevant input data. Certain boundary conditions are not applied automatically because more detailed information may be ...
Heat Transfer and Friction Characteristics in Turbulent
Heat Transfer and Friction Characteristics in Turbulent

... cluded that ducts which have only obtuse angle corners should be more efficient than those (e) with acute angle corners. Finally, the effect of the thermal boundary condition is considered. In the present study, we assumed a constant heat transfer rate along the axis with the peripheral wall tempera ...
(Revised) Text for Sections 5.7 to 5.9 5.7 WHERE AND HOW MUCH
(Revised) Text for Sections 5.7 to 5.9 5.7 WHERE AND HOW MUCH

... severe climate, a greater amount of insulation is needed than in a moderate climate. In a temperate climate, little or no insulation may be required. From an economic standpoint again, there generally is an optimum level of envelope insulation for a particular climate. This is defined as that level ...
Simulation of energy in the building and design a new intelligent
Simulation of energy in the building and design a new intelligent

... is too hot. Number two is that it's too cold. Many people cope by adding fans, space heaters, covering up vents, complaining, conducting 'thermostat wars' with their co-workers, or simply leaving the office. Occupants can be driven to distraction trying to adjust the comfort in their space. Improper ...
Sample Paper
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... many foundries. However, magnesia fiber lining cannot be used in the preheated condition because the binder disintegrates when exposed to high temperatures (1500– 1700C [2732–3092F]) for a long time (preheating and holding time). The goal of this research was to further reduce the thermal conductivi ...
latest developments in indirectly heated electric resistance
latest developments in indirectly heated electric resistance

... located in vertical walls. The best way to obtain good heat transfer is to freely hang the wire or strip on the wall. To make maximum use of available accommodation area, heating elements are often design for series or parallel combination. This enables applications to be operated on high or low hea ...
MINERAL WOOL INSULATIONS SAFETY
MINERAL WOOL INSULATIONS SAFETY

... performance for mechanical/power and process piping systems operating from sub-ambient to 1200°F (649°C). This molded pipe insulation is easily fabricated, cutting cleanly and easily with a knife. Very low in-service shrinkage helps prevent gaps from forming at joints, preventing costly thermal leak ...
PowerPoint Presentation - Moving to High
PowerPoint Presentation - Moving to High

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... where it mixes the cold water stream which is at 20oC. It is desired that the mixture be at 40oC. Assuming the pressure is homogenous in the mixing chamber find the flow rate of the cold water. (6)Steam enters an adiabatic turbine at 10Mpa, 500K, 80m/s and at a rate of 3kg/s. It leaves at 20kPa and ...
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... In Table 1 are shown the stratigraphies of the outer walls, horizontal structures (floor) and inner partitions used in the standard solution [6], currently under production in Italy (Tuscany Region). In particular in Table 1, for each layers, are shown: thickness (d), thermal conductivity (λ), densi ...
Finding your thermal solutions in the Heat Lab at Georgia Tech
Finding your thermal solutions in the Heat Lab at Georgia Tech

... FDTR setup is specifically designed to measure both the in-plane and through-plane thermal conductivity with spot sizes ~50 µm. This technique is designed for heating modulation rates up to 200 MHz and can determine what nanoscale lengths most effectively reduce the thermal conductivity in exotic an ...
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Tg - Glass Transition Temperature for Epoxies

... The Tg is strongly dependent on the cure schedule. Low temperature cures such as room temperature (RT) will result in the lowest possible Tg of all for that chemistry. Very high Tg values are not achievable by room temperature curing. If the same material is cured at an elevated temperature, a highe ...
Energy efficiency in architecture
Energy efficiency in architecture

... and visual comfort at reduced levels energy & resources consumption. Energy resource efficiency in new constructions can be effected by adopting an integrated approach to building design. The primary steps in this approach would be to: „ Incorporate solar passive techniques in a building design to m ...
thermal study of a large ground heat exchanger in clay
thermal study of a large ground heat exchanger in clay

... loop length and other key parameters of the GHX. When present, the GHX forms the core of the space conditioning system comprising the set of heat pumps located in different zones, circulating pumps, piping, control equipment, etc. Long term ground temperature drift In the larger GHXs for the commerc ...
AN700 - AMCOM Communications, Inc.
AN700 - AMCOM Communications, Inc.

... good the thermal contact is. Both the metal heat sink surface and the PCB bottom surface should be flat. The contact between the metal heat sink and PCB should not have any air pocket. We recommend the following to minimize the interface thermal resistance: 1- The ground metal heat sink should be Sn ...
avances - Universidad San Francisco de Quito
avances - Universidad San Francisco de Quito

... In addition, a very restrictive factor for the final steadystate temperature obtained is related to the constant temperature boundary conditions applied on both contact extremes. These fixed temperatures do not account for physical behavior and could act as heat sinks [14]. Future work should includ ...
2. Energy Balance of Buildings
2. Energy Balance of Buildings

... the room, but quite contrary they help to heat up the room in accordance with the principle of conservation of energy. Thus, the internal heat gain corresponds once again to the wattage of the appliances. For cold climates the internal heat gain is welcomed as it contributes to the heating of the ho ...
3. Turbulent Heat Fluxes
3. Turbulent Heat Fluxes

... The objective is directed at adaptation of retrieval mechanisms that have been used elsewhere with SSM/IAVHRR combination. In order to determine the impact, TMI/VIRS derived products are verified against TRITON/TAO buoy array observations in the warm pool region. The results reveal extremely small b ...
environmental behaviour of tensile membrane structures
environmental behaviour of tensile membrane structures

... and will often quote two U- values, one for standard winter conditions and one for standard summer conditions. However, adopting a steady state analysis technique, which was developed to predict the internal climate of conventional building types is not strictly appropriate for describing the therm ...
Healthy environments from a broad perspective – an overview of
Healthy environments from a broad perspective – an overview of

... effect on the healthy environment. This starts with the outdoor environment, e.g. local wind climate and dispersion of pollutants, to optimize the local conditions in which buildings are situated and to optimize building designs to this environment. The building envelope is the main barrier between ...
226_che.pdf
226_che.pdf

... available, particularly during the initial design stage. Under the circumstances, theoretical approaches can be more efficient and cost effective [5-6]. Theoretical approaches include numerical modeling or analytical derivation. For a complicated problem as the current investigation, the derivation ...
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Thermal comfort

Thermal comfort is the condition of mind that expresses satisfaction with the thermal environment and is assessed by subjective evaluation (ANSI/ASHRAE Standard 55). Maintaining this standard of thermal comfort for occupants of buildings or other enclosures is one of the important goals of HVAC (heating, ventilation, and air conditioning) design engineers.Thermal neutrality is maintained when the heat generated by human metabolism is allowed to dissipate, thus maintaining thermal equilibrium with the surroundings. The main factors that influence thermal comfort are those that determine heat gain and loss, namely metabolic rate, clothing insulation, air temperature, mean radiant temperature, air speed and relative humidity. Psychological parameters such as individual expectations also affect thermal comfort.The Predicted Mean Vote (PMV) model stands among the most recognized thermal comfort models. It was developed using principles of heat balance and experimental data collected in a controlled climate chamber under steady state conditions. The adaptive model, on the other hand, was developed based on hundreds of field studies with the idea that occupants dynamically interact with their environment. Occupants control their thermal environment by means of clothing, operable windows, fans, personal heaters, and sun shades.The PMV model can be applied to air conditioned buildings, while the adaptive model can be generally applied only to buildings where no mechanical systems have been installed. There is no consensus about which comfort model should be applied for buildings that are partially air conditioned spatially or temporally.Thermal comfort calculations according to ANSI/ASHRAE Standard 55 can be freely performed with the CBE Thermal Comfort Tool for ASHRAE 55.Similar to ASHRAE Standard 55 there are other comfort standards like EN 15251 and the ISO 7730 standard.
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