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Suitability of sunken courtyards in the desert climate of Kuwait
Suitability of sunken courtyards in the desert climate of Kuwait

... 1.0 m of soil cover and roof insulation (Fig. 5). The higher percentage is possible when wall insulation is applied on the upper 1.5 m only, and the soil is covered with summer vegetation (to provide shading and evaporation). In the three-story case, the reduction is estimated to be at least 28% wit ...
thermal and moisture control in insulated assemblies - U
thermal and moisture control in insulated assemblies - U

... particularly if the air space is not sealed or of uniform thickness (Palfey 1980). For critical applications, a particular design’s effectiveness should be confirmed by actual test data undertaken by using the ASTM hot box method (ASTM Standard C1363). This test is especially necessary for construct ...
Building Envelope
Building Envelope

... The use of in situ tests for the evaluation of buildings’ energy performance. The thermal-hygrometric characteristics of a building (trasmitance and thermal inertia) become of a growing field of interest and are based on simple calculation under static regime. One of the starting points in this eval ...
Environmental Design and Inspection Services
Environmental Design and Inspection Services

... payback period of only two to three years. Recommendations on the type of heating system that is healthiest for homeowners and their families. Strategies for cooling the house in summer to reduce the load of costly central air conditioning and to allow installation of smaller, less expensive equipme ...
Full-Text PDF
Full-Text PDF

... when 0.1 wt % displays 101.31 J/g. It is not surprising to see such trend showing up as the dispersion of nanoparticles and the presence/size of agglomerate will affect both of these characteristics by altering the entropy of the medium. Whilst trend can be spotted, the relationship is still a diffi ...
Sound and heat revolutions in phononics - E
Sound and heat revolutions in phononics - E

... photons, it would be valuable to achieve a similar degree of control over the particle that accounts for both sound and heat (Fig. 1). Although some sonic and thermal devices and materials, such as medical ultrasound imaging machines and thermal insulation materials, are well known, further applicat ...
Thermal properties of graphene: Fundamentals and
Thermal properties of graphene: Fundamentals and

... data available for graphite.17–19 The specific heat is stored by the lattice vibrations (phonons) and the free conduction electrons of a material, C = Cp + Ce. However, phonons dominate the specific heat of graphene at all practical temperatures19,20 (>1 K), and the phonon specific heat increases with ...
Audio Visual Hints - University of Virginia, Department of Computer
Audio Visual Hints - University of Virginia, Department of Computer

... Power management is not sufficient for chip-level thermal management • Must target blocks with high power density • When they are hot • Spreading heat helps – Even if energy not affected – Even if average temperature goes up • This also helps reduce leakage ...
Anomalous thermodynamic properties in ferropericlase throughout
Anomalous thermodynamic properties in ferropericlase throughout

... solution by considering the effect of other atomic configurations is desirable, but it is beyond what we can afford calculating today. It is well known that larger iron concentrations increase the onset of the crossover pressure13 clearly indicating inter-iron interactions. This broadens the crossov ...
الشريحة 1
الشريحة 1

... The heat and coldness that the men feel depend not only on air temperature (dry bulb temperature), but also on humidity and distribution of air. In addition the general comfortable zone air conditions are within the comfortable zone, the room air is not always optimum. For example, if temperature di ...
Supporting the Eindhoven University of Technology to
Supporting the Eindhoven University of Technology to

... production, the available data of all buildings will be analyzed, mainly focusing on the total ATES balance. The amount of heat or cold extracted for use and the heat extracted for the cooling towers will be analyzed to see what the actual imbalance is. 2.1. Classification of buildings To create som ...
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as PDF

... heat fluxes. Reviews of these research can be found in Ostrach (1988) and Hyun (1994). The rectangular cavity is not an adequate model for many geophysical situations where a variable (or sloping) geometry has a significant effect on the system. However, the convective flows in triangular shaped enclos ...
Chapter Two The Thermodynamic Laws
Chapter Two The Thermodynamic Laws

... reservoir and produce a net amount of work." This was shown to be equivalent to the statement of Clausius. (2.3.2). Statements of the second law (2.3.2.1). Thermal reservoir Thermal reservoir, characterized by its temperature, is a reservoir of infinite heat capacity. Thermal reservoir can play the ...
Thermal Dynamics of Radiant Floor Heating with Wooden Flooring
Thermal Dynamics of Radiant Floor Heating with Wooden Flooring

... the heating source and tighter parameters can be set to ensure greater thermal comfort with less  energy expense.  The systems that have lower rates of temperature degradation after the heat source  has been turned off would rank higher than those that do not.  Traditional Retrofit  Retrofit of trad ...
Heat Transfer Through Buildings - Fabric Heat Gain/Loss
Heat Transfer Through Buildings - Fabric Heat Gain/Loss

... consider the thermal capacity of the walls and roof. Due to the finite and often large thermal capacity of the buildings, the heat transfer rate from outside to the outer surface is not equal to the heat transfer rate from the inner surface to the indoor space 1 . In addition, the thermal capacity ...
1 - Newcastle University ePrints
1 - Newcastle University ePrints

... engines. A predictive trend establishing the deterioration of engine health due to normal wear and tear in components is acceptable provided corrective action is undertaken with preventive maintenance or condition monitoring to minimise loss of performance. If the necessary preventive maintenance or ...
Beat the Heat
Beat the Heat

... Sodium (salt) supplementation during exercise is recommended for heavy and ‘salty’ sweaters who may deliberately increase sodium intake prior to and following hot-weather training and racing. During exercise lasting longer than 1 h, it is advisable to add electrolyte tablets or the equivalent pinch ...
the spatial analysis of surface temperature
the spatial analysis of surface temperature

... (Rn – G)} and 24 hour net radiation, the calculation of the ETa includes the transformation of Rn24hour from W/m2 to mm per day by the surface temperature dependent latent heat of vaporization. Background theory and details of SEBAL is described in Bastiaanssen et al. (1998). 2.2 Extraction of Land ...
The ISOVER Multi-Comfort House – for moderate climate
The ISOVER Multi-Comfort House – for moderate climate

... windows have very pleasant inner surface temperatures, even at very low outdoor temperatures. External walls as well as floors above the cellar are only by 0.5 to 1 degree cooler than the room air temperature. Passive house windows are by 2 to 3 degrees cooler than the room air temperature. In house ...
Thermal structure of continental upper mantle inferred
Thermal structure of continental upper mantle inferred

... and amplitude of the velocity perturbations between 180 and 230 km depth with the maximum thickness of the thermal boundary layer (TBL), in which larger variations in temperature and possibly composition than in the underlying convecting mantle can be sustained. Velocity profiles for different tecto ...
Modelling of Phase Change Material Implemented - Purdue e-Pubs
Modelling of Phase Change Material Implemented - Purdue e-Pubs

... Khudhair, A.M., Farid, M., 2004, A review on energy conservation in building applications with thermal storage by latent heat using phase change materials, Energy Convers. Manage., vol. 45, no. 2: p. 263-275. Moureh, J., Flick, D., 2004, Airflow pattern and temperature distribution in a typical refr ...
Final Report.doc
Final Report.doc

... Several investigations and studies have been completed concerning the subject of materials for TE devices and recovering waste heat as a green energy source. Thermoelectric technology is used in countless applications to power small electronics, or harness enough energy from large heat producing sou ...
Reliability Considerations for SuperFlux LEDs
Reliability Considerations for SuperFlux LEDs

... Refer to Application Note 11492 Mechanical Design Considerations for SuperFlux LEDs for a description of the procedure and ...
Possibilities of using thermal mass in buildings to save energy, cut
Possibilities of using thermal mass in buildings to save energy, cut

... losses), make buildings more air-tight and reduce ventilation losses by heat recovery. Another aspect to consider is the user behaviour, which may cause substantial differences in energy use; therefore, savings can also be achieved through information. New systems for indoor air conditioning have be ...
Temporal and spatial dispersion of human body temperature during
Temporal and spatial dispersion of human body temperature during

... Methods. In this prospective single-centre study, we studied 24 patients undergoing cardiothoracic surgery: 12 in normothermia, 3 in mild, and 9 in deep hypothermia. Temperature recordings of a non-invasive heat flux sensor at the forehead were compared with the arterial outlet temperature of a hear ...
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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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