Aalborg Universitet Zero Energy Buildings Bejder, Anne Kirkegaard; Knudstrup, Mary-Ann
... District heating is different from one area to another, due to city sizes, the historic development within the area, as well as heat supply technologies and fuels available. In general, district heating is beneficial to an area in the sense that it utilizes heat from other processes such as elect ...
... District heating is different from one area to another, due to city sizes, the historic development within the area, as well as heat supply technologies and fuels available. In general, district heating is beneficial to an area in the sense that it utilizes heat from other processes such as elect ...
Thermochem
... Surroundings - everything else Universe = system + surroundings Endothermic - energy in, system absorbs heat from the surroundings(+ enthalpy change). Exothermic - energy out, system loses heat to surroundings(- enthalpy change). ...
... Surroundings - everything else Universe = system + surroundings Endothermic - energy in, system absorbs heat from the surroundings(+ enthalpy change). Exothermic - energy out, system loses heat to surroundings(- enthalpy change). ...
Heat gains utilisation and system efficiency influence to the heat
... losses and usable heat gains for the building. The evaluation [6] focuses on the comparison of dynamic and static calculation results, in order to determine the correlation between the heat-balance ratio and the gain utilization factor. Stochastic comparison [1] determines that two different approac ...
... losses and usable heat gains for the building. The evaluation [6] focuses on the comparison of dynamic and static calculation results, in order to determine the correlation between the heat-balance ratio and the gain utilization factor. Stochastic comparison [1] determines that two different approac ...
8. Temperature and Heat - City, University of London
... Heat (Q) is the energy transferred due to temperature differences and its units are Joules It takes 4186J of heat to raise the temperature of 1kg of water by 1°C The heat required for a 1°C increase varies from one substance to another, e.g. it takes only 129J of heat to increase the temperature of ...
... Heat (Q) is the energy transferred due to temperature differences and its units are Joules It takes 4186J of heat to raise the temperature of 1kg of water by 1°C The heat required for a 1°C increase varies from one substance to another, e.g. it takes only 129J of heat to increase the temperature of ...
Chapter 19 First Law of Thermodynamics 19.1 Specific Heat (I)
... thermodynamic path between two equilibrium states. That is, Q and W are associated with processes. The heat absorbed by a system will increase its internal energy, only some of which is thermal energy. How is it possible for heat to enter or to leave a system and yet not to be store in it? Sound ene ...
... thermodynamic path between two equilibrium states. That is, Q and W are associated with processes. The heat absorbed by a system will increase its internal energy, only some of which is thermal energy. How is it possible for heat to enter or to leave a system and yet not to be store in it? Sound ene ...
Aalborg Universitet Heiselberg, Per Kvols
... emitted from the air conditioner on the body can chill the body and risk causing airconditioning syndromes such as sensitivity to cold, headaches, and physical listlessness. In comparison with their male counterparts, female office workers wear less clothing, making it more likely for them to experi ...
... emitted from the air conditioner on the body can chill the body and risk causing airconditioning syndromes such as sensitivity to cold, headaches, and physical listlessness. In comparison with their male counterparts, female office workers wear less clothing, making it more likely for them to experi ...
WINTER NIGHT HABITS OF BIRDS
... mechanism to act. Metabolism rises; that is, energy originally taken in as food is turned into heat at a greater rate, to meet the greater demand, and body temperature is maintained. If the demand (heat loss) is extreme, body temperature may be permitted to fall somewhat, and loss of heat is thereby ...
... mechanism to act. Metabolism rises; that is, energy originally taken in as food is turned into heat at a greater rate, to meet the greater demand, and body temperature is maintained. If the demand (heat loss) is extreme, body temperature may be permitted to fall somewhat, and loss of heat is thereby ...
Comparative Thermal Performance of Static Sunshade and Brick
... Buildings are major consumers of energy throughout their lifecycle [1]. Energy efficient building design can help to conserve energy through appropriate materials, insulation and architectural design. The thermal environment in a building depends upon the heat flow through building envelope, distrib ...
... Buildings are major consumers of energy throughout their lifecycle [1]. Energy efficient building design can help to conserve energy through appropriate materials, insulation and architectural design. The thermal environment in a building depends upon the heat flow through building envelope, distrib ...
Heat Transfer - Concord Consortium
... In the building trades, the rate of heat loss is called conductivity (U), which is the same as k, seen on page 31. The most common measure of conductivity is its inverse: resistance to heat flow, called R or R-value. R (thermal resistivity) = 1 / U (thermal conductivity) The greater the value of R, ...
... In the building trades, the rate of heat loss is called conductivity (U), which is the same as k, seen on page 31. The most common measure of conductivity is its inverse: resistance to heat flow, called R or R-value. R (thermal resistivity) = 1 / U (thermal conductivity) The greater the value of R, ...
Progress Report - UCLA Fusion Home
... • High Prandtl number fluid ⇒ Heat transfer performance is low • Electrolysis can occur due to induced current It is necessary to enhance heat transfer performance with relatively low flow velocity. To investigate heat transfer performance of Flibe, Tohoku-NIFS ...
... • High Prandtl number fluid ⇒ Heat transfer performance is low • Electrolysis can occur due to induced current It is necessary to enhance heat transfer performance with relatively low flow velocity. To investigate heat transfer performance of Flibe, Tohoku-NIFS ...
Thermal comfort - thermal mass: housing in hot dry climates
... may have certain advantages, such as in buildings a priori designed with lightweight envelope, but it can only function properly under very specific conditions. In the case of free running buildings this means that all internal mass should be equally exposed to summer night ventilation and winter di ...
... may have certain advantages, such as in buildings a priori designed with lightweight envelope, but it can only function properly under very specific conditions. In the case of free running buildings this means that all internal mass should be equally exposed to summer night ventilation and winter di ...
Density of Thermal Insulating Materials Kg/m3 K
... variations in temperatures would be on the inside surfaces between night and day. The smaller the decrement factor the more comfortable living inside the house will be. See figure 5 a for details about thermal comfort and its relationship with the ambient internal temperature and the average tempera ...
... variations in temperatures would be on the inside surfaces between night and day. The smaller the decrement factor the more comfortable living inside the house will be. See figure 5 a for details about thermal comfort and its relationship with the ambient internal temperature and the average tempera ...
Chapter 5, Problem 1
... A double-pane window consists of two 3-mm thick layers of glass separated by a 12-mm wide stagnant air space. For specified indoors and outdoors temperatures, the rate of heat loss through the window and the inner surface temperature of the window are to be determined. Assumptions 1 Heat transfer th ...
... A double-pane window consists of two 3-mm thick layers of glass separated by a 12-mm wide stagnant air space. For specified indoors and outdoors temperatures, the rate of heat loss through the window and the inner surface temperature of the window are to be determined. Assumptions 1 Heat transfer th ...
Applied Thermodynamics
... However, there are some processes that can be assumed internally reversible with good approximation, such as processes in cylinders with reciprocating piston. The working fluid is always in an equilibrium state in internally reversible process. But the surroundings undergo a state change that can ne ...
... However, there are some processes that can be assumed internally reversible with good approximation, such as processes in cylinders with reciprocating piston. The working fluid is always in an equilibrium state in internally reversible process. But the surroundings undergo a state change that can ne ...
Temperature Regulation
... when mild, and produce medical problems, when severe B. Mammals and birds are endotherms ...
... when mild, and produce medical problems, when severe B. Mammals and birds are endotherms ...
3 Environmental Design and Bioclimatic architecture
... multi-seasonal considerations, for example, reducing heating needs with maximum sunlight from Southern oriented windows. If these techniques have worked for generations in these communities designed for their geographic region, then clearly modern design could benefit from careful integration of the ...
... multi-seasonal considerations, for example, reducing heating needs with maximum sunlight from Southern oriented windows. If these techniques have worked for generations in these communities designed for their geographic region, then clearly modern design could benefit from careful integration of the ...
worksheet
... 9. The temperature of a cup hot chocolate is 110o F. A metal spoon is placed in the hot chocolate. Conduction will continue until the entire spoon reaches __________o F. ...
... 9. The temperature of a cup hot chocolate is 110o F. A metal spoon is placed in the hot chocolate. Conduction will continue until the entire spoon reaches __________o F. ...
Museum Collections in Industrial Buildings A selection
... The sequence of activities until production will vary for each project, as perceived needs are matched to available buildings. ...
... The sequence of activities until production will vary for each project, as perceived needs are matched to available buildings. ...
February 21
... W/m2·oC. If the case temperature of the transistor is not to exceed 75oC, determine the maximum power each transistor can dissipate safely, and the temperature jump at the case-plate interface. In this problem we really should do a two-dimensional analysis since the heat supplied by the transistors ...
... W/m2·oC. If the case temperature of the transistor is not to exceed 75oC, determine the maximum power each transistor can dissipate safely, and the temperature jump at the case-plate interface. In this problem we really should do a two-dimensional analysis since the heat supplied by the transistors ...
3 Environmental Design and Bioclimatic architecture
... multi-seasonal considerations, for example, reducing heating needs with maximum sunlight from Southern oriented windows. If these techniques have worked for generations in these communities designed for their geographic region, then clearly modern design could benefit from careful integration of the ...
... multi-seasonal considerations, for example, reducing heating needs with maximum sunlight from Southern oriented windows. If these techniques have worked for generations in these communities designed for their geographic region, then clearly modern design could benefit from careful integration of the ...
Building Envelope - Advanced Buildings
... Heat transfer through envelope components is complex and dynamic. The direction and magnitude of heat flow are affected by solar gains from the sun, outdoor temperature, indoor temperature, and exposed surface area. Building envelope components have three important characteristics that affect their ...
... Heat transfer through envelope components is complex and dynamic. The direction and magnitude of heat flow are affected by solar gains from the sun, outdoor temperature, indoor temperature, and exposed surface area. Building envelope components have three important characteristics that affect their ...
latest developments in indirectly heated electric resistance
... Temperature instrumentation and control system include temperature system, controllers, and final control elements for controlling energy flow, measurement instruments and set point programmers. Programmable logic controllers have been used to hand in material movement, analyse variables have been c ...
... Temperature instrumentation and control system include temperature system, controllers, and final control elements for controlling energy flow, measurement instruments and set point programmers. Programmable logic controllers have been used to hand in material movement, analyse variables have been c ...
Cure Epoxies with Heat Heating Devices
... costs associated with providing heat is not consistent with industrywide objectives of lowering overall manufacturing costs. “Heat-curable epoxies are still widely available, but most companies are looking to decrease their overall costs to manufacture, especially time requirements,” claims Small. “ ...
... costs associated with providing heat is not consistent with industrywide objectives of lowering overall manufacturing costs. “Heat-curable epoxies are still widely available, but most companies are looking to decrease their overall costs to manufacture, especially time requirements,” claims Small. “ ...
Ground cover height affects pre-dawn orchard floor temperature
... freezes in orchards; their careful management, therefore, can provide protection. During daylight, shortwave (solar)radiation strikes the ground and some energy is stored in the soil and in floor vegetation.A portion of this is emitted at night as longwave (terrestrial)radiation. When less heat is s ...
... freezes in orchards; their careful management, therefore, can provide protection. During daylight, shortwave (solar)radiation strikes the ground and some energy is stored in the soil and in floor vegetation.A portion of this is emitted at night as longwave (terrestrial)radiation. When less heat is s ...
Human-thermal
... Human thermal comfort is a combination of a subjective sensation (how we feel) and several objective interaction with the environment (heat and mass transfer rates) regulated by the brain. Comfort depends on several physical magnitudes that we may group as: • Person-related. Deep body temperature in ...
... Human thermal comfort is a combination of a subjective sensation (how we feel) and several objective interaction with the environment (heat and mass transfer rates) regulated by the brain. Comfort depends on several physical magnitudes that we may group as: • Person-related. Deep body temperature in ...
HVAC
HVAC (heating, ventilating, and air conditioning; also heating, ventilation, and air conditioning) is the technology of indoor and vehicular environmental comfort. Its goal is to provide thermal comfort and acceptable indoor air quality. HVAC system design is a subdiscipline of mechanical engineering, based on the principles of thermodynamics, fluid mechanics, and heat transfer. Refrigeration is sometimes added to the field's abbreviation as HVAC&R or HVACR, or ventilating is dropped as in HACR (such as the designation of HACR-rated circuit breakers).HVAC is important in the design of medium to large industrial and office buildings such as skyscrapers and in marine environments such as aquariums, where safe and healthy building conditions are regulated with respect to temperature and humidity, using fresh air from outdoors.Ventilating or ventilation (the V in HVAC) is the process of ""exchanging"" or replacing air in any space to provide high indoor air quality which involves temperature control, oxygen replenishment, and removal of moisture, odors, smoke, heat, dust, airborne bacteria, and carbon dioxide. Ventilation removes unpleasant smells and excessive moisture, introduces outside air, keeps interior building air circulating, and prevents stagnation of the interior air.Ventilation includes both the exchange of air to the outside as well as circulation of air within the building. It is one of the most important factors for maintaining acceptable indoor air quality in buildings. Methods for ventilating a building may be divided into mechanical/forced and natural types.