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Please answer all parts of the question and show all work! Thanks!
5. A hot plate...
please show all work, thanks 2. A hot surface at 100 °C needs to be cooled...
please show all work, thanks
2. A hot surface at 100 °C needs to be cooled by attaching one 3-cm long, 0.25-cm-diameter pin (circular cross-section) fins with k =237 W/mK. The ambient air at a temperature of 30 °C, and there is a cross flow to the pins, of 1 m/s (air velocity). The fin is INSULATED at the end. a (15%). What is the heat transfer rate for one fin? b (15%). What is the temperature at the tip?
Please answer the problem below for all parts . Please show all work and write clearly. Thanks.
Please answer the problem below for all parts . Please show all
work and write clearly. Thanks.
(a) (0) What is the difference between an autotransformer and a conventional transformer? 2. (ii) Why are high-impedance transformer used in electric toys? (b) Three single-phase transformers each rated at 150 kVA, 7200 V/600 V, 60 Hz, are connected in wye-delta on a 12470 V, 3-phase line. If the load is 450 kVA, calculate the followings: (i) The current flowing in the incoming...
(2 pts) Heat is transferred from a hot fluid (temperature T1 and heat transfer coefficient h2)...
(2 pts) Heat is transferred from a hot fluid (temperature T1 and heat transfer coefficient h2) through a plane wall of thickness 8, surface area A and the thermal conductivity k. The thermal resistance for the set up is + (a) AC ) (b) A (i + + ) (c) 2 (na + + n2) (d) A (na + b +h2) (2 pts) An increase in convective heat transfer coefficient over a fin will (a) increase effectiveness (b) decrease effectiveness...
Please solve and show all work thanks #4 A copper ball with a diameter of 10...
Please solve and show all work
thanks
#4 A copper ball with a diameter of 10 cm is at 70 °C throughout and then is suddenly inserted into flowing air at 20 °C. The surface temperature of the ball is measured by a thermocouple to be 55 ° C one minute after the ball is inserted into the flowing air. Assuming that the temperature of the ball is uniform throughout as it cools, determine the heat transfer coefficient (h, W/m'K)...
please show me the steps and the equations. I been failing this class and will award...
please show me the steps and the equations. I been
failing this class and will award points to best answer
(Extra) Water enters a smooth 2.66 cm diameter thin-walled pipe at a mean velocity of 1.8 m/s and a temperature of 20°C and is to heated by a hot fluid flowing past the outside of the pipe. The hot fluid is at a temperature of 50°C and the corresponding heat transfer coefficient on the outside surface of the pipe is...
can I please to have a clear handwritten answer of the above question, your help is...
can I please to have a clear handwritten answer of the
above question, your help is appreciated, thanks.
QUESTION 10- CONDENSERS AND EVAPORATORS 10.1 Explain how relative humidity in a cold room is effected and controlled by evaporator selection 10.2 An air-cooled condenser is to reject 70 kW of heat from the condensing refrigerant to air The condenser has an air-side area of 210 m2 and an overall heat transfer coefficient based on this area of 0,037 kW/m2K. It is...
Please make the hand writing legible. Thanks Consider the situation depicted below, in which an incompressible...
Please make the hand writing legible. Thanks
Consider the situation depicted below, in which an incompressible fluid flows over a flat surface of solid. Upstream of the surface, the fluid has velocity U and uniform temperature To. As the fluid is viscous, both a momentum boundary layer, and a thermal boundary layer form, and heat is transferred to the solid surface. A convective coefficient h can be used to describe the dimensional heat transfer rate to the solid, and is...
Please answer clearly and neatly so I can read your work. I will give a good...
Please answer clearly and neatly so
I can read your work. I will give a good rating! Thank you (:
Consider a concentric tube heat exchanger with hot and cold water inlet temperatures of 202 and 35°C respectively. The flow rates of the hot and cold fluids are 42 and 84 kg/h, respectively. Assume the overall heat transfer coefficient is 178 W/m2k. cc = 4186 J/kgk, ch = 4302 J/kgK What is the maximum heat transfer rate that could be...
Could you be concise with the work and equations used? Please and thanks! An aluminum plate...
Could you be concise with the work and equations used? Please and thanks! An aluminum plate has length of .12 m and a width of .10 m at 25 degree celcius. The plate is uniformly heated to 225 degrees celcius. If the linear expansion coefficient for aluminum is 2.3*10^-5 /C degree, what is the change in the area of the plate as a result of the increase in temperature?
Please show all work Turbine blade k-17 WIm-K p=11 cm, L = 53 cm Ac-5.13 cm...
Please show all work
Turbine blade k-17 WIm-K p=11 cm, L = 53 cm Ac-5.13 cm -T 450°C . A plane wall with surface temperature of 350°Cis at- tached with straight rectangular fins (k = 235 win-K). The fins are exposed to an ambient air condition of 25°C and the convection heat transfer coefficient is 154 W/m2-K. Each fin has a length of 50 mm, a base of 5 mm thick and a width of 100 mm. Determine the efficiency,...
please show all work, thanks
2. A hot surface at 100 °C needs to be cooled by attaching one 3-cm long, 0.25-cm-diameter pin (circular cross-section) fins with k =237 W/mK. The ambient air at a temperature of 30 °C, and there is a cross flow to the pins, of 1 m/s (air velocity). The fin is INSULATED at the end. a (15%). What is the heat transfer rate for one fin? b (15%). What is the temperature at the tip?
Please answer the problem below for all parts . Please show all
work and write clearly. Thanks.
(a) (0) What is the difference between an autotransformer and a conventional transformer? 2. (ii) Why are high-impedance transformer used in electric toys? (b) Three single-phase transformers each rated at 150 kVA, 7200 V/600 V, 60 Hz, are connected in wye-delta on a 12470 V, 3-phase line. If the load is 450 kVA, calculate the followings: (i) The current flowing in the incoming...
(2 pts) Heat is transferred from a hot fluid (temperature T1 and heat transfer coefficient h2) through a plane wall of thickness 8, surface area A and the thermal conductivity k. The thermal resistance for the set up is + (a) AC ) (b) A (i + + ) (c) 2 (na + + n2) (d) A (na + b +h2) (2 pts) An increase in convective heat transfer coefficient over a fin will (a) increase effectiveness (b) decrease effectiveness...
Please solve and show all work
thanks
#4 A copper ball with a diameter of 10 cm is at 70 °C throughout and then is suddenly inserted into flowing air at 20 °C. The surface temperature of the ball is measured by a thermocouple to be 55 ° C one minute after the ball is inserted into the flowing air. Assuming that the temperature of the ball is uniform throughout as it cools, determine the heat transfer coefficient (h, W/m'K)...
please show me the steps and the equations. I been
failing this class and will award points to best answer
(Extra) Water enters a smooth 2.66 cm diameter thin-walled pipe at a mean velocity of 1.8 m/s and a temperature of 20°C and is to heated by a hot fluid flowing past the outside of the pipe. The hot fluid is at a temperature of 50°C and the corresponding heat transfer coefficient on the outside surface of the pipe is...
can I please to have a clear handwritten answer of the
above question, your help is appreciated, thanks.
QUESTION 10- CONDENSERS AND EVAPORATORS 10.1 Explain how relative humidity in a cold room is effected and controlled by evaporator selection 10.2 An air-cooled condenser is to reject 70 kW of heat from the condensing refrigerant to air The condenser has an air-side area of 210 m2 and an overall heat transfer coefficient based on this area of 0,037 kW/m2K. It is...
Please make the hand writing legible. Thanks
Consider the situation depicted below, in which an incompressible fluid flows over a flat surface of solid. Upstream of the surface, the fluid has velocity U and uniform temperature To. As the fluid is viscous, both a momentum boundary layer, and a thermal boundary layer form, and heat is transferred to the solid surface. A convective coefficient h can be used to describe the dimensional heat transfer rate to the solid, and is...
Please answer clearly and neatly so
I can read your work. I will give a good rating! Thank you (:
Consider a concentric tube heat exchanger with hot and cold water inlet temperatures of 202 and 35°C respectively. The flow rates of the hot and cold fluids are 42 and 84 kg/h, respectively. Assume the overall heat transfer coefficient is 178 W/m2k. cc = 4186 J/kgk, ch = 4302 J/kgK What is the maximum heat transfer rate that could be...
Please show all work
Turbine blade k-17 WIm-K p=11 cm, L = 53 cm Ac-5.13 cm -T 450°C . A plane wall with surface temperature of 350°Cis at- tached with straight rectangular fins (k = 235 win-K). The fins are exposed to an ambient air condition of 25°C and the convection heat transfer coefficient is 154 W/m2-K. Each fin has a length of 50 mm, a base of 5 mm thick and a width of 100 mm. Determine the efficiency,...
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