1 - AgEcon Search
... within the object under consideration. There isa limiting boundary conclition (surface heat transfer capability) that results in a negli gible temperature gradient within an object being heated or cooled. For example, a small copper sphere being cooled in relatively still air will have an :impere;e ...
... within the object under consideration. There isa limiting boundary conclition (surface heat transfer capability) that results in a negli gible temperature gradient within an object being heated or cooled. For example, a small copper sphere being cooled in relatively still air will have an :impere;e ...
Cooling&Heating load-rev
... • Most of the times, the power input to the fan is not known a priori as the amount of supply air required is not known at this stage. To take this factor into account, initially it is assumed that the supply fan adds about 5% of the room sensible cooling load and cooling loads are then estimated. ...
... • Most of the times, the power input to the fan is not known a priori as the amount of supply air required is not known at this stage. To take this factor into account, initially it is assumed that the supply fan adds about 5% of the room sensible cooling load and cooling loads are then estimated. ...
Review on thermal management systems using phase change
... power conversion temperature 25 1C [17,18]. As the temperature-sensitive devices including electronic equipment, Li-ion batteries and photovoltaic modules are getting highly integrated and more compact, good thermal management systems are becoming crucial for providing good performance and long serv ...
... power conversion temperature 25 1C [17,18]. As the temperature-sensitive devices including electronic equipment, Li-ion batteries and photovoltaic modules are getting highly integrated and more compact, good thermal management systems are becoming crucial for providing good performance and long serv ...
Thermal Dynamics of Radiant Floor Heating with Wooden Flooring
... These bounds of the ideal heating curve are not met with conventional heating systems (Figure 2). A natural action to expect from heated liquids and gases is that the warmed particles will rise causing the cooler particles to fall. By this thermodynamic understanding of particle behavior, a hea ...
... These bounds of the ideal heating curve are not met with conventional heating systems (Figure 2). A natural action to expect from heated liquids and gases is that the warmed particles will rise causing the cooler particles to fall. By this thermodynamic understanding of particle behavior, a hea ...
Process Heat Transfer Lec 1: Basic Concepts of Heat Transfer
... electronic configurations of the atoms or molecules. ...
... electronic configurations of the atoms or molecules. ...
Thermal Simulation for a Room with Solid and One
... etc.). To assess the amount of energy consumed by the various structural components, buildings have been analysed by many researchers from thermal point of view. As mentioned in reference 2, Wheel has carried out experimental work and found out that about one-third of the energy loss occurs through ...
... etc.). To assess the amount of energy consumed by the various structural components, buildings have been analysed by many researchers from thermal point of view. As mentioned in reference 2, Wheel has carried out experimental work and found out that about one-third of the energy loss occurs through ...
Mechanistic Modeling of CHF In Forced-Convection
... 18 mm i.d. The resultant hydraulic diameter was 10 mm. The fluid used in the experiment was Freon R-113 at a fixed pressure of 0.147 MPa (the corresponding saturation temperature was 332 K). The present model was incorporated into the overall model of a boiling channel and numerically implemented us ...
... 18 mm i.d. The resultant hydraulic diameter was 10 mm. The fluid used in the experiment was Freon R-113 at a fixed pressure of 0.147 MPa (the corresponding saturation temperature was 332 K). The present model was incorporated into the overall model of a boiling channel and numerically implemented us ...
Temperature Field and Thermal Stress Analyses of
... overheating, which reduces braking efficiency or even system failure. Attempt in this paper is to perform optimal design of the pad structure by focusing on the temperature filed and disc thermal stress. The approach of this study is to compare the disc and the pad's temperature fields under differe ...
... overheating, which reduces braking efficiency or even system failure. Attempt in this paper is to perform optimal design of the pad structure by focusing on the temperature filed and disc thermal stress. The approach of this study is to compare the disc and the pad's temperature fields under differe ...
Performance evaluation of a natural convective
... In our present study, we have evaluated the performance of an STEG that uses a commercial Bi2Te3 thermoelectric module coupled with a high temperature spectrally selective absorber coating. In the first part of the paper, we have determined the thermal performance of our coating under different opti ...
... In our present study, we have evaluated the performance of an STEG that uses a commercial Bi2Te3 thermoelectric module coupled with a high temperature spectrally selective absorber coating. In the first part of the paper, we have determined the thermal performance of our coating under different opti ...
A Simple Approach for Building Cooling Load Estimation
... deals with the development and authentication of computer software for estimating building cooling load. The software is simpler to use, needs fewer input data and is more versatile compared to any other commercially available, exorbitantly costly and extensively used software. The effects of signif ...
... deals with the development and authentication of computer software for estimating building cooling load. The software is simpler to use, needs fewer input data and is more versatile compared to any other commercially available, exorbitantly costly and extensively used software. The effects of signif ...
Heat-Strengthened and Tempered Glass brochure
... With tempered glass, spontaneous breakage can occur occasionally resulting from inclusion of materials such as nickel sulfide. These inclusions are inherent to in the production process. When the window breaks, the tempered glass splinters into numerous pieces, which can fall out of the opening eith ...
... With tempered glass, spontaneous breakage can occur occasionally resulting from inclusion of materials such as nickel sulfide. These inclusions are inherent to in the production process. When the window breaks, the tempered glass splinters into numerous pieces, which can fall out of the opening eith ...
Thermal properties of rocks at the investigation sites
... specific heat capacity was determined with a calorimetric method, and diffusivity was measured with a transient heat conduction instrument. Thermal conductivity was calculated from quantitative mineral composition data detennined petrographically using thin sections. Diffusivity was also determined ...
... specific heat capacity was determined with a calorimetric method, and diffusivity was measured with a transient heat conduction instrument. Thermal conductivity was calculated from quantitative mineral composition data detennined petrographically using thin sections. Diffusivity was also determined ...
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 ...
... 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 ...
thermal-mass-report
... The four (4) log homes chosen for the Montana region (approximately 8000 HDD) are located in Frenchtown, Hamilton, and Livingston, Montana, and in Wapiti, Wyoming. The four (4) log homes chosen for the New York region (approximately 7000 HDD) are located in Evans Mills and Milton, New York and in Hu ...
... The four (4) log homes chosen for the Montana region (approximately 8000 HDD) are located in Frenchtown, Hamilton, and Livingston, Montana, and in Wapiti, Wyoming. The four (4) log homes chosen for the New York region (approximately 7000 HDD) are located in Evans Mills and Milton, New York and in Hu ...
Active Cooling Of A Mobile Phone Handset
... consumption of a phone of the type investigated here. Measurements of acoustic noise were not performed in this investigation, however Walsh et al 2009[12] measured equivalent sound levels of 27 and 35 dBA for a fan of similar design and diameter at speeds of 4000 and 7500 RPM respectively at five c ...
... consumption of a phone of the type investigated here. Measurements of acoustic noise were not performed in this investigation, however Walsh et al 2009[12] measured equivalent sound levels of 27 and 35 dBA for a fan of similar design and diameter at speeds of 4000 and 7500 RPM respectively at five c ...
Performance and testing of thermal interface materials
... power is expected. By 2003, the CPU power should be approaching 120 W, which will further increase the interface heat flux. Because of this, significant work has been done to develop new higher performance thermal interface materials. In addition, the desire for increased yield and reliability requi ...
... power is expected. By 2003, the CPU power should be approaching 120 W, which will further increase the interface heat flux. Because of this, significant work has been done to develop new higher performance thermal interface materials. In addition, the desire for increased yield and reliability requi ...
Multilayer Insulation Testing at Varible Boundary Temperatures
... temperature, and h is known as the convective heat transfer coefficient. Due to its complexity and dependence on numerous variables, the heat transfer coefficient is usually determined experimentally. There exists two types of convection: forced and natural. Forced convection occurs when an external ...
... temperature, and h is known as the convective heat transfer coefficient. Due to its complexity and dependence on numerous variables, the heat transfer coefficient is usually determined experimentally. There exists two types of convection: forced and natural. Forced convection occurs when an external ...
Cryostat Design - CERN Accelerator School
... diagnostics instrumentation, safety devices, etc.) The basic technical competencies for a cryostat design engineer are mechanical engineering and heat transfer. But their application at cryogenic temperatures calls for specific competencies on thermal and mechanical properties of materials at low te ...
... diagnostics instrumentation, safety devices, etc.) The basic technical competencies for a cryostat design engineer are mechanical engineering and heat transfer. But their application at cryogenic temperatures calls for specific competencies on thermal and mechanical properties of materials at low te ...
1 Thermal Energy
... and convection, both of which need matter to transfer energy. Radiation is the only way of transferring thermal energy that doesn’t require matter. ...
... and convection, both of which need matter to transfer energy. Radiation is the only way of transferring thermal energy that doesn’t require matter. ...
experimental comparison of four borehole heat exchangers
... meter by the secondary fluid is calculated for the down and up going channel of each collector using equation 1. The latter is immediately used in order to calculate the borehole thermal resistance Rb for each of the collector channels as well, assuming a temperature value for the borehole wall. Cho ...
... meter by the secondary fluid is calculated for the down and up going channel of each collector using equation 1. The latter is immediately used in order to calculate the borehole thermal resistance Rb for each of the collector channels as well, assuming a temperature value for the borehole wall. Cho ...
Prediction of Effective Thermal Conductivity of Refractory Materials
... (RRSB) distribution. In addition, the grain shapes of different components were observed from the scanning electron microscopy (SEM) images and are approximated by basic polyhedral shapes during the geometry generation process. The discrete phase distribution is created in the computational domain, ...
... (RRSB) distribution. In addition, the grain shapes of different components were observed from the scanning electron microscopy (SEM) images and are approximated by basic polyhedral shapes during the geometry generation process. The discrete phase distribution is created in the computational domain, ...
Thermal Effect on the Automobile Piston
... intermetallic compound which leads to reduce the coating wear resistance if it performed at 4500C and above temperture14. By increasing the temperature of AlSiCuMg piston alloy from 1800C to 1900C, the eutectic silicon particles cause to improve tensile strength and thermal diffusivity of the piston ...
... intermetallic compound which leads to reduce the coating wear resistance if it performed at 4500C and above temperture14. By increasing the temperature of AlSiCuMg piston alloy from 1800C to 1900C, the eutectic silicon particles cause to improve tensile strength and thermal diffusivity of the piston ...
Slide 1
... standards as you can see in this overhead of a thermal conductivity measurements on board Leg ODP 150 New Jersey Margin in the summer of 1993. People are (L toR) Bryce Hoppie and Craig Fulthorpe. These needles contain heaters and temperature sensors. These needles measure the speed at which the temp ...
... standards as you can see in this overhead of a thermal conductivity measurements on board Leg ODP 150 New Jersey Margin in the summer of 1993. People are (L toR) Bryce Hoppie and Craig Fulthorpe. These needles contain heaters and temperature sensors. These needles measure the speed at which the temp ...
Convective heat transfer for fluids passing through
... which temperature measurements could be taken at a stabilized temperature profile. According to the information reported elsewhere, the temperature profile for the horizontal flow through metal foams becomes stabilized at the distance which is equal to 3–4 times the duct transverse size (the length ...
... which temperature measurements could be taken at a stabilized temperature profile. According to the information reported elsewhere, the temperature profile for the horizontal flow through metal foams becomes stabilized at the distance which is equal to 3–4 times the duct transverse size (the length ...
Passive solar building design
In passive solar building design, windows, walls, and floors are made to collect, store, and distribute solar energy in the form of heat in the winter and reject solar heat in the summer. This is called passive solar design because, unlike active solar heating systems, it does not involve the use of mechanical and electrical devices.The key to design a passive solar building is to best take advantage of the local climate performing an accurate site analysis. Elements to be considered include window placement and size, and glazing type, thermal insulation, thermal mass, and shading. Passive solar design techniques can be applied most easily to new buildings, but existing buildings can be adapted or ""retrofitted"".