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 ...
Refrigeration and Air- Conditioning
... 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 R are individually true and R is the correct explanation of A (b)Both A and R ...
... 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 R are individually true and R is the correct explanation of A (b)Both A and R ...
cooling of electronic equipment
... The field of electronics deals with the construction and utilization of devices that involve current flow through a vacuum, a gas, or a semiconductor. This exciting field of science and engineering dates back to 1883, when Thomas Edison invented the vacuum diode. The vacuum tube served as the founda ...
... The field of electronics deals with the construction and utilization of devices that involve current flow through a vacuum, a gas, or a semiconductor. This exciting field of science and engineering dates back to 1883, when Thomas Edison invented the vacuum diode. The vacuum tube served as the founda ...
The suitability of a compact thermosyphon heat
... with gravity driven coolant circulation that benefits from high heat transfer coefficients of coolant’s phase transition. The coolant boiling and condensing not only enable efficient heat exchange in small locations but it does it without the use of compressors or pumps. The boiling acts as a natura ...
... with gravity driven coolant circulation that benefits from high heat transfer coefficients of coolant’s phase transition. The coolant boiling and condensing not only enable efficient heat exchange in small locations but it does it without the use of compressors or pumps. The boiling acts as a natura ...
A Comprehensive Review of Radiant Barrier
... Laboratory-controlled experiments indicated that radiant barriers installed under flat roofs provided greater reductions than those installed below pitched roofs. In both cases, the radiant barriers were installed in HRB configurations. Laboratorycontrolled experiments of IRCCs applied in flat roof ...
... Laboratory-controlled experiments indicated that radiant barriers installed under flat roofs provided greater reductions than those installed below pitched roofs. In both cases, the radiant barriers were installed in HRB configurations. Laboratorycontrolled experiments of IRCCs applied in flat roof ...
laser cooling of solids
... Anti-Stokes laser cooling of solids, liquids, and gases is closely related to the technique of laser Doppler cooling of free atoms (Chu, 1991; Cohen-Tannoudji and Phillips, 1990; Wineland and Itano, 1987), for the practical development and extensions of which the 1997 Nobel prize in physics was awar ...
... Anti-Stokes laser cooling of solids, liquids, and gases is closely related to the technique of laser Doppler cooling of free atoms (Chu, 1991; Cohen-Tannoudji and Phillips, 1990; Wineland and Itano, 1987), for the practical development and extensions of which the 1997 Nobel prize in physics was awar ...
Chapter 19 - Clg Coils
... the same form as those for sensible heat exchangers to produce an analogy solution that can be directly solved to yield a simple but accurate representation of coil performance. A description of the processes that occur inside a cooling coil is important to the formulation of the heat and mass trans ...
... the same form as those for sensible heat exchangers to produce an analogy solution that can be directly solved to yield a simple but accurate representation of coil performance. A description of the processes that occur inside a cooling coil is important to the formulation of the heat and mass trans ...
Review of biomaterial thermal property
... shows the dendritic ice formation and growth with further cooling in isotonic saline due to directional freezing, where the crystallization of water into ice will expel solutes into the remaining unfrozen liquid channels between the dendritic ‘‘cells” and the bulk liquid further from the cooling sou ...
... shows the dendritic ice formation and growth with further cooling in isotonic saline due to directional freezing, where the crystallization of water into ice will expel solutes into the remaining unfrozen liquid channels between the dendritic ‘‘cells” and the bulk liquid further from the cooling sou ...
Apparent Latent Heat of Evaporation from 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) demonstrated that for impermeable clothing (classic rainw ...
... 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) demonstrated that for impermeable clothing (classic rainw ...
TECHNIQUES FOR PRECISION AIR TEMPERATURE CONTROL
... in production and increased cost both inconvenience in solutions, although sufficient have caused both (4.). These solutions, ...
... in production and increased cost both inconvenience in solutions, although sufficient have caused both (4.). These solutions, ...
2007 Sundaram JT
... contaminants and other particulate matter present in the mainstream gas takes place through impingement onto the surface. Typically in a gas turbine, the first rows of vanes are subjected to direct impingement resulting in particulate deposition 关7兴. The mechanism for this could be attributed to th ...
... contaminants and other particulate matter present in the mainstream gas takes place through impingement onto the surface. Typically in a gas turbine, the first rows of vanes are subjected to direct impingement resulting in particulate deposition 关7兴. The mechanism for this could be attributed to th ...
Apparent latent heat of evaporation from clothing: attenuation and
... rates (in Watts), can be determined directly, whereas the dry (DRY) heat loss rate (R ⫹ C ⫹ K) is normally calculated as the balance of all other heat gain and loss rates (DRY ⫽ M ⫺ W ⫺ EVAP ⫺ RESP ⫺ S). The latter is often done in clothing research and thermal tolerance studies (17, 19, 20, 31), wh ...
... rates (in Watts), can be determined directly, whereas the dry (DRY) heat loss rate (R ⫹ C ⫹ K) is normally calculated as the balance of all other heat gain and loss rates (DRY ⫽ M ⫺ W ⫺ EVAP ⫺ RESP ⫺ S). The latter is often done in clothing research and thermal tolerance studies (17, 19, 20, 31), wh ...
Advances in dehydration of foods
... conditions, while the amount of water added or removed may be calculated by dierences between the humidity ratios before and after the process. Note that when the saturation line is reached the air is not able to retain or absorb more water and the process moves along the saturation line. The case ...
... conditions, while the amount of water added or removed may be calculated by dierences between the humidity ratios before and after the process. Note that when the saturation line is reached the air is not able to retain or absorb more water and the process moves along the saturation line. The case ...
Chapter 14
... Consider 1 kg of dry air. By definition, dry air contains no water vapor, and thus its specific humidity is zero. Now let us add some water vapor to this dry air. The specific humidity will increase. As more vapor or moisture is added, the specific humidity will keep increasing until the air can hol ...
... Consider 1 kg of dry air. By definition, dry air contains no water vapor, and thus its specific humidity is zero. Now let us add some water vapor to this dry air. The specific humidity will increase. As more vapor or moisture is added, the specific humidity will keep increasing until the air can hol ...
GAS MIXTURES AND PSYCHROMETRICS Up
... systems that involve a single pure substance such as water, refrigerant134a, or nitrogen. Many important thermodynamic applications, however, involve mixtures of several pure substances rather than a single pure substance. Therefore, it is important to develop an understanding of mixtures and learn ...
... systems that involve a single pure substance such as water, refrigerant134a, or nitrogen. Many important thermodynamic applications, however, involve mixtures of several pure substances rather than a single pure substance. Therefore, it is important to develop an understanding of mixtures and learn ...
Latent heat storage in buildings
... heat storage medium that has been in use for many years in refrigeration technology. As an alternative to traditional hot water storage, latent heat storage devices were introduced into heating technology many years ago in order to significantly increase heat storage capacities. However, the idea of ...
... heat storage medium that has been in use for many years in refrigeration technology. As an alternative to traditional hot water storage, latent heat storage devices were introduced into heating technology many years ago in order to significantly increase heat storage capacities. However, the idea of ...
Thermal Comfort of Spectators in Stadia Built in Hot Climates
... Thermal comfort is influenced by a combination of physical factors, such as air temperature, mean radiant temperature, air speed, humidity, metabolic rate and clothing levels. The latter two factors are independent of the environmental conditions, but are influenced by the human physiology and the p ...
... Thermal comfort is influenced by a combination of physical factors, such as air temperature, mean radiant temperature, air speed, humidity, metabolic rate and clothing levels. The latter two factors are independent of the environmental conditions, but are influenced by the human physiology and the p ...
Optimization of Thin Film Microcoolers for Hot Spot
... thin film refrigerator is inversely proportional to the length of its elements [3]. For example, thin film coolers with the order of several microns thick are expected to provide cooling power densities larger than 1000 W/cm2 if one neglects nonideal effects such as metal-semiconductor contact resis ...
... thin film refrigerator is inversely proportional to the length of its elements [3]. For example, thin film coolers with the order of several microns thick are expected to provide cooling power densities larger than 1000 W/cm2 if one neglects nonideal effects such as metal-semiconductor contact resis ...
Heating, Ventilation and Air Conditioning in Smart Energy
... Future buildings will need very little thermal energy, because of well-insulated envelopes, highperformance windows, and energy-efficient ventilation. It is a wish to use more central heating with water as energy carrier at the sacrifice of direct electric heating. To succeed with this it is necessa ...
... Future buildings will need very little thermal energy, because of well-insulated envelopes, highperformance windows, and energy-efficient ventilation. It is a wish to use more central heating with water as energy carrier at the sacrifice of direct electric heating. To succeed with this it is necessa ...
Thermoelectric Cooling Technology
... world. To provide consistently low temperatures (e.g. below 10 °C), they are less suitable. However, for incubation at or around room temperature (15 – 30 °C) or for applications with heat input, such units can be operated economically. In such cases, poor energy efficiency is of little consequence ...
... world. To provide consistently low temperatures (e.g. below 10 °C), they are less suitable. However, for incubation at or around room temperature (15 – 30 °C) or for applications with heat input, such units can be operated economically. In such cases, poor energy efficiency is of little consequence ...
AIR CONDITIONING
... heat from an isolated environment (inside the car) to an area capable of absorbing heat (outside the car). Latent heat of vapourization When changing from solid to liquid (or vice versa), heat can be added to a substance without raising its temperature. Pressure Applying pressure to a substance chan ...
... heat from an isolated environment (inside the car) to an area capable of absorbing heat (outside the car). Latent heat of vapourization When changing from solid to liquid (or vice versa), heat can be added to a substance without raising its temperature. Pressure Applying pressure to a substance chan ...
Effect of Temperature and Humidity on Evaporative Water Loss in
... a dew-point hygrometer (General Eastern model l lOODP) to measure the water content, then through U-tubes containing soda lime and Drierite to remove C0 2 and water vapor, and finally to an oxygen analyzer (Applied Electrochemistry model S-3A). Prior to each run, the C0 2 analyzer was calibrated wit ...
... a dew-point hygrometer (General Eastern model l lOODP) to measure the water content, then through U-tubes containing soda lime and Drierite to remove C0 2 and water vapor, and finally to an oxygen analyzer (Applied Electrochemistry model S-3A). Prior to each run, the C0 2 analyzer was calibrated wit ...
in-situ water uptake rate measurement of aqsoa
... Tel: +1 (778) 782-8538; E-mail: [email protected] ...
... Tel: +1 (778) 782-8538; E-mail: [email protected] ...
Hygrothermal analysis of a stabilised rammed earth test building in... David Allinson , Matthew Hall *
... historical weather data were obtained from a personal weather station, located approximately 7 km due south of the SRE building [10]. These data consisted of observations of temperature, pressure, relative humidity, wind speed, wind direction, rainfall and solar radiation, recorded at approximately ...
... historical weather data were obtained from a personal weather station, located approximately 7 km due south of the SRE building [10]. These data consisted of observations of temperature, pressure, relative humidity, wind speed, wind direction, rainfall and solar radiation, recorded at approximately ...
Cooling And Heating Load Calculations -Estimation Of
... The Cooling Load Factor (CLF) accounts for the fact that all the radiant energy that enters the conditioned space at a particular time does not become a part of the cooling load 1 instantly. As solar radiation enters the conditioned space, only a negligible portion of it is absorbed by the air part ...
... The Cooling Load Factor (CLF) accounts for the fact that all the radiant energy that enters the conditioned space at a particular time does not become a part of the cooling load 1 instantly. As solar radiation enters the conditioned space, only a negligible portion of it is absorbed by the air part ...
Evaporative cooler
Evaporative cooler temperature|dry-bulb]] temperature and wet-bulb temperature. In arid climates, evaporative cooling can reduce energy consumption and total equipment for conditioning as an alternative to compressor-based cooling. In climates not considered arid, indirect evaporative cooling can still take advantage of the evaporative cooling process without increasing humidity. Passive evaporative cooling strategies offer the same benefits of mechanical evaporative cooling systems without the complexity of equipment and ductwork.