Heat production and heat flow in the mantle lithosphere, Slave
... 10 vol.% of eclogite, this would cause a two- to three-fold increase in mantle heat production. For a 150 km thick mantle lithosphere, this is an additional 5–11 mW m−2 contribution to reduced or surface heat flow. Even where the stratigraphy of the mantle is wellestablished (e.g. north central Slav ...
... 10 vol.% of eclogite, this would cause a two- to three-fold increase in mantle heat production. For a 150 km thick mantle lithosphere, this is an additional 5–11 mW m−2 contribution to reduced or surface heat flow. Even where the stratigraphy of the mantle is wellestablished (e.g. north central Slav ...
Sadi Carnot, 'Founder of the Second Law of Thermodynamics'
... This requirement by Carnot is equivalent to requiring reversible processes only. Carnot declares [4, p 13]: Every change of temperature which is not due to a change of volume or to chemical action (an action that we provisionally suppose not to occur here) is necessarily due to the direct passage of ...
... This requirement by Carnot is equivalent to requiring reversible processes only. Carnot declares [4, p 13]: Every change of temperature which is not due to a change of volume or to chemical action (an action that we provisionally suppose not to occur here) is necessarily due to the direct passage of ...
Analysis of Thermal Energy Collection from Precast Concrete Roof
... technologies which have not been widely demonstrated. In addition, the infrastructure at the factory level is not present for large scale production [2]. Furthermore, since it is a relatively new idea to the housing industry, the long term economic benefits associated with reduced operating costs ha ...
... technologies which have not been widely demonstrated. In addition, the infrastructure at the factory level is not present for large scale production [2]. Furthermore, since it is a relatively new idea to the housing industry, the long term economic benefits associated with reduced operating costs ha ...
I. INTRODUCTION II. MEASUREMENT OF SOIL
... the initial moist value will result in lower cable temperatures and using the final dry resistivity will result in much higher cable temperatures and lower allowable ampacities, and some intermediate value may be more accurate but more difficult to determine. ...
... the initial moist value will result in lower cable temperatures and using the final dry resistivity will result in much higher cable temperatures and lower allowable ampacities, and some intermediate value may be more accurate but more difficult to determine. ...
C051
... more vital. The trend was toward greater heat transfer rates per unit volume. The hot side of the evaporators in these applications was generally air, gas or a condensing vapor. The airside fin geometry also saw significant improvements resulting from increased heat transfer coefficients as well as ...
... more vital. The trend was toward greater heat transfer rates per unit volume. The hot side of the evaporators in these applications was generally air, gas or a condensing vapor. The airside fin geometry also saw significant improvements resulting from increased heat transfer coefficients as well as ...
Pdf - Text of NPTEL IIT Video Lectures
... quantities for a process is always less than delta S which means that delta S is greater than delta Q divided by T for any process. Then we recognize that if a process is adiabatic and reversible, delta Q is 0 and moreover the process is reversible that means delta QR is 0 so, delta S becomes 0. Fo ...
... quantities for a process is always less than delta S which means that delta S is greater than delta Q divided by T for any process. Then we recognize that if a process is adiabatic and reversible, delta Q is 0 and moreover the process is reversible that means delta QR is 0 so, delta S becomes 0. Fo ...
Full-Text PDF
... The concept of heat pipes was first described in 1942, but the real development of heat pipes started in the 1960s [1]. Properly designed heat pipes can transport heat at very high rates with a small temperature difference between the cold and the warm end. This is possible because the heat transpor ...
... The concept of heat pipes was first described in 1942, but the real development of heat pipes started in the 1960s [1]. Properly designed heat pipes can transport heat at very high rates with a small temperature difference between the cold and the warm end. This is possible because the heat transpor ...
Three-Dimensional Simulations of Mantle Convection in Io
... points (McEwen et al. 1998a). These observations support the asthenosphere heating model. A spatially filtered view of Io’s volcanic features and mountains, presented in this paper, is also suggestive of tidal heating mainly in an asthenosphere. Large-scale longitudinal variations in Io’s topography ...
... points (McEwen et al. 1998a). These observations support the asthenosphere heating model. A spatially filtered view of Io’s volcanic features and mountains, presented in this paper, is also suggestive of tidal heating mainly in an asthenosphere. Large-scale longitudinal variations in Io’s topography ...
ARMATHERM™ Minimize building energy loss and improve
... ArmathermTM thermal break materials provide a combination of low thermal conductivity and high compressive strength and have been designed and tested to prevent thermal bridging. ArmathermTM has been proven through three dimensional modeling to reduce heat loss in wall assemblies, transitions and st ...
... ArmathermTM thermal break materials provide a combination of low thermal conductivity and high compressive strength and have been designed and tested to prevent thermal bridging. ArmathermTM has been proven through three dimensional modeling to reduce heat loss in wall assemblies, transitions and st ...
Chapter 11 - Faculty of Mechanical Engineering
... The reversed Carnot cycle is the most efficient refrigeration cycle operating between two specified temperature levels. Therefore, it is natural to look at it first as a prospective ideal cycle for refrigerators and heat pumps. If we could, we certainly would adapt it as the ideal cycle. As explaine ...
... The reversed Carnot cycle is the most efficient refrigeration cycle operating between two specified temperature levels. Therefore, it is natural to look at it first as a prospective ideal cycle for refrigerators and heat pumps. If we could, we certainly would adapt it as the ideal cycle. As explaine ...
Chapter 4 - McGraw Hill Higher Education
... of the system will increase. Since the system is adiabatic and cannot have any heat transfer to or from the surroundings (Q 0), the conservation of energy principle dictates that the electrical work done on the system must equal the increase in energy of the system. Next, let us replace the electr ...
... of the system will increase. Since the system is adiabatic and cannot have any heat transfer to or from the surroundings (Q 0), the conservation of energy principle dictates that the electrical work done on the system must equal the increase in energy of the system. Next, let us replace the electr ...
Chapter 6
... As pointed out earlier, work can easily be converted to other forms of energy, but converting other forms of energy to work is not that easy. The mechanical work done by the shaft shown in Fig. 6–8, for example, is first converted to the internal energy of the water. This energy may then leave the w ...
... As pointed out earlier, work can easily be converted to other forms of energy, but converting other forms of energy to work is not that easy. The mechanical work done by the shaft shown in Fig. 6–8, for example, is first converted to the internal energy of the water. This energy may then leave the w ...
Keyhole mode laser welding of tantalum, Ti--6Al--4V
... assuming that the temperatures at the keyhole wall reach the boiling point of the different metals or alloys. A turbulence model based on Prandtl’s mixing length hypothesis was used to estimate the effective viscosity and thermal conductivity in the liquid region. The calculated weld cross-sections ...
... assuming that the temperatures at the keyhole wall reach the boiling point of the different metals or alloys. A turbulence model based on Prandtl’s mixing length hypothesis was used to estimate the effective viscosity and thermal conductivity in the liquid region. The calculated weld cross-sections ...
Heat and Thermodynamics
... potential energy due to its position with respect to the ground. Potential energy can also exist when two bodies are connected with a spring. Other forms of energy include electrical, magnetic, chemical and nuclear. Energy can be transformed from one form to another to make it more suitable for a pa ...
... potential energy due to its position with respect to the ground. Potential energy can also exist when two bodies are connected with a spring. Other forms of energy include electrical, magnetic, chemical and nuclear. Energy can be transformed from one form to another to make it more suitable for a pa ...
Oil Cooling of Electric Motor using CFD
... Figure 2 Cross section of rotor showing the heat losses from the magnets ......................................................13 Figure 3 Magnet losses as a function of the rotational speed (Hagstedt, 2014). ...............................................13 Figure 4 Steady flow between fixed parall ...
... Figure 2 Cross section of rotor showing the heat losses from the magnets ......................................................13 Figure 3 Magnet losses as a function of the rotational speed (Hagstedt, 2014). ...............................................13 Figure 4 Steady flow between fixed parall ...
Evolution of the lithosphere after tectonic emplacement or differential
... transfer mechanism is conduction, which is heat transfer through a material by atomic or molecular interaction that occurs through solid material and at boundary layers. The temperature distribution can be determined by solving the heat conduction equation (Eq. 1). The units in this equation are all ...
... transfer mechanism is conduction, which is heat transfer through a material by atomic or molecular interaction that occurs through solid material and at boundary layers. The temperature distribution can be determined by solving the heat conduction equation (Eq. 1). The units in this equation are all ...
Overheating in new homes
... communal heating systems have the potential to overheat throughout the year, not just in the summer months or in heatwaves. In rural and suburban locations it may be easy to use natural ventilation (eg window opening) to help cool dwellings, but in urban and deep-urban locations it is often not poss ...
... communal heating systems have the potential to overheat throughout the year, not just in the summer months or in heatwaves. In rural and suburban locations it may be easy to use natural ventilation (eg window opening) to help cool dwellings, but in urban and deep-urban locations it is often not poss ...
Thermochemistry
... in both cases, the resultant unit is kg m2 s -2. This corresponds to the SI unit of energy called the joule (J). That is, 1 joule (J) = 1 kg m2 s -2. The bouncing ball in Figure 7-2 suggests something about the nature of energy and work. First, to lift the ball to the starting position, we have to a ...
... in both cases, the resultant unit is kg m2 s -2. This corresponds to the SI unit of energy called the joule (J). That is, 1 joule (J) = 1 kg m2 s -2. The bouncing ball in Figure 7-2 suggests something about the nature of energy and work. First, to lift the ball to the starting position, we have to a ...
Heat exchanger
A heat exchanger is a device used to transfer heat between one or more fluids. The fluids may be separated by a solid wall to prevent mixing or they may be in direct contact. They are widely used in space heating, refrigeration, air conditioning, power stations, chemical plants, petrochemical plants, petroleum refineries, natural-gas processing, and sewage treatment. The classic example of a heat exchanger is found in an internal combustion engine in which a circulating fluid known as engine coolant flows through radiator coils and air flows past the coils, which cools the coolant and heats the incoming air.