Solutions to Problems (Übungen) to Lecture-1 of Lecture Series “Heat Transfer – 1” Institut für Energieverfahrenstechnik und Brennstofftechnik‚ TU Clausthal‚ SS 2005 1.1 A heat rate of 5 kW is conducted through a cross section area of 20 m2 and thickness of 3 cm. If the inner (hot) surface temperature is 600ºC and the thermal conductivity of the material is 0.5 W/mK‚ what is the outer surface temperature? Solution: Tout = 585 °C 1.2 The heat flux through a wood slab 50 mm thick‚ whose inner and outer
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In this experiment‚ the Independent Variable was the heat lamp‚ and the dependent variable was the temperature of the soil‚ because the temperature varied based on whether the heat lamp was turned off or on‚ and whether there was extra water added or not. Our hypothesis was proven correct‚ because the dry soil’s temperature was hotter than the damp soil’s temperature when the heat lamp was on‚ but then it decreased when it turned off‚ while the damp soil’s temperature remained the same. This is because
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Beat the heat with aircon repair Summer times can be difficult to manage in the hot regions and this calls for a nice chilled breeze of the air conditioner. While this may be the best prospect at this time‚ the problem comes with the appliance itself. Air conditioners just like any other electronic appliance are prone to problems and malfunctions. The malfunctions in this case can be quite bad considering how complicated the appliance is and this means that it requires professional help and not a
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Conclusions The purpose of this experiment was to find the relationship between a substance’s specific heat and its atomic weight. In the lab‚ the substances with the higher atomic weights had less specific heat. From this‚ we can conclude that specific heat and atomic weight have an inverse relationship‚ meaning as one decreases the other increases. The reason for this is because if atoms are small‚ or light‚ they have the ability to pack tightly together‚ leaving almost no space between them
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Title: Specific Heat Capacities of Metals Experiment Date: 3/28/2012 Report Date: 4/4/2012 Purpose: The purpose of the lab is to measure the specific heat capacities of aluminum‚ steel and brass. Theory: The amount of heat (ΔQ) required to change the temperature of an object is proportional to the mass (m) of the object and the temperature change (ΔT) of the object. ΔQ= cmΔT where c is called as the specific heat capacity of the material. In the calorie units system the unit of quantity
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Heat Transfer Lab report Free & Forced Convection Heat Transfer Mahmood Mohsin AL-Khusaibi 85135 Amur Sultan Al-Habsi 86260 Rashid Nasser Al Shabibi 85362 Aim: The objective of this experiment to investigate the use of extended surface to improve heat transfer through surfaces. In addition‚ another target is to demonstrate the effect of the fluid speed on the heat transfer by convection. Introduction: Heat transfer by convection is one of three heat transfer
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Heat Stress in the Work Place! Eastern Kentucky University Heat Stress is the exposure to extreme heat or working in hot environments. Workers who are exposed to this may be at risk of heat stress. Heat Stress can result in occupational illnesses and injuries. “Heat stress can result in heat stroke‚ heat exhaustion‚ heat cramps‚ or heat rashes. Heat can also increase the risk of injuries in workers as it may result in sweaty palms‚ fogged-up safety glasses‚ and dizziness. Burns may
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main purpose of the experiment is to investigate heat transfer processes using the tubular heat exchanger which is a specific type of heat exchangers. Moreover‚ the primary goals are to compare the two types of flow cases‚ co-current flow and countercurrent flow as well as taking the analyses of their temperature changes through the graphical curves and observing the heat transmission via the operating apparatus. The working principles of the tubular heat exchanger is analyzed and the fluid temperate
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Aim: i) To find the relationship between supplied energy and change in temperature of water. ii) To find the specific heat capacity (SHC) of water. Hypothesis: As time increases so does the temperature since the water is exposed to the heated wire for a longer period of time. Variables: The Dependent Variable is the temperature of the water‚ and since the Energy is calculated using temperature it is a dependent variable as well. The constant variables are the voltage and current. Theory:
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UNIVERSITI TUNKU ABDUL RAHMAN Faculty Course : Engineering and Science Unit Code : : Bachelor of Engineering (Hons) Chemical / Mechanical Engineering Unit Title : Academic : Year Session : Lecturer 2014/2015 : UEME 3213 Heat and Mass Transfer Dr. Mah Shee Keat/ Mr. Chong Kok Chung 201501 Tutorial 2 1) A one dimensional plane wall of thickness 2L = 80 mm experiences uniform thermal energy generation of ?̇ = 1000 W/m3 and is convectively cooled at ? = ±40 mm by an ambient fluid characterized
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