new energy-efficient building concepts affecting human thermal
... As core temperature of the human body rises above its neutral value, vasodilation occurs and cardial output increases dramatically. Nearly 100% of this increase goes to the skin tissue. For this development, a state of maximum vasodilation is achieved when core temperature reaches 37.2°C. At this st ...
... As core temperature of the human body rises above its neutral value, vasodilation occurs and cardial output increases dramatically. Nearly 100% of this increase goes to the skin tissue. For this development, a state of maximum vasodilation is achieved when core temperature reaches 37.2°C. At this st ...
Specific Heat and Phase Change - CK
... • Specific heat is similar to heat capacitance, but is a specific number. The specific heat tells you how much energy one must put in per unit mass in order to raise the temperature 1◦C. • Phase changes: it takes energy to changes phases from a solid to a liquid and from a liquid to a gas. The subst ...
... • Specific heat is similar to heat capacitance, but is a specific number. The specific heat tells you how much energy one must put in per unit mass in order to raise the temperature 1◦C. • Phase changes: it takes energy to changes phases from a solid to a liquid and from a liquid to a gas. The subst ...
Thermal Analysis of Heat Transfer Enhancement
... Figure 3(a). Highest heat transfer coefficient is at Re 150 for 0.5% vol % with 7.3% higher as compared to base fluid. The heat transfer coefficient increases as both the volume concentration and Re number are increased for all Al2O3 nanofluids. The addition of nano particles have enhanced the therm ...
... Figure 3(a). Highest heat transfer coefficient is at Re 150 for 0.5% vol % with 7.3% higher as compared to base fluid. The heat transfer coefficient increases as both the volume concentration and Re number are increased for all Al2O3 nanofluids. The addition of nano particles have enhanced the therm ...
INTERCOMPANY MEMORANDUM CAL CHEM CORPORATION To
... f is called the fin effectiveness. For the fin to be cost effective, the fin effectiveness should be greater than 2. The temperature profile along the fin must be determined before the fin effectiveness can be calculated. Consider the cylindrical extended surface with diameter D shown in Figure 2. ...
... f is called the fin effectiveness. For the fin to be cost effective, the fin effectiveness should be greater than 2. The temperature profile along the fin must be determined before the fin effectiveness can be calculated. Consider the cylindrical extended surface with diameter D shown in Figure 2. ...
Modulated Temperature DSC and the DSC 8500: A Step Up in
... the identical method would have to be subtracted, thus doubling the time required for this analysis. (When only changes in the specific heat were of interest this step was not required.) Now with the DSC 8500 or DSC 8000, running an empty pan baseline may not be required for kinetic analysis if the ...
... the identical method would have to be subtracted, thus doubling the time required for this analysis. (When only changes in the specific heat were of interest this step was not required.) Now with the DSC 8500 or DSC 8000, running an empty pan baseline may not be required for kinetic analysis if the ...
Dynamic insulation
Dynamic insulation is a form of insulation where cool outside air flowing through the thermal insulation in the envelope of a building will pick up heat from the insulation fibres. Buildings can be designed to exploit this to reduce the transmission heat loss (U-value) and to provide pre-warmed, draft free air to interior spaces. This is known as dynamic insulation since the U-value is no longer constant for a given wall or roof construction but varies with the speed of the air flowing through the insulation (climate adaptive building shell). Dynamic insulation is different from breathing walls. The positive aspects of dynamic insulation need to be weighed against the more conventional approach to building design which is to create an airtight envelope and provide appropriate ventilation using either natural ventilation or mechanical ventilation with heat recovery. The air-tight approach to building envelope design, unlike dynamic insulation, results in a building envelope that provides a consistent performance in terms of heat loss and risk of interstitial condensation that is independent of wind speed and direction. Under certain wind conditions a dynamically insulated building can have a higher heat transmission loss than an air-tight building with the same thickness of insulation.