The human brain is especially sensitive to elevatedtemperatures. The cool blood in the veins leaving theface and neck and returning to the heart may contributeto thermal regulation of the brain by cooling the arterial blood flowing to the brain. Consider a vein andartery running between the chest and the base of the skull for a distance L=250 mm, with mass flow ratesof
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- Q=2000J Tout=? V(m/s) D=0.1m air Air at (2.95x10^2) K is entering in a circular pipe at 101325 Pa as shown in Figure. The velocity of the air at the pipe entrance is (1.000x10^0) m/s. The diameter of the pipe is 0.1m. Specific gas constant of air is 287 J/kg-K. Specific heat of air is 1000 J/kg-K. Find the outlet temperature if 2000 J of heat is added to the pipe. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answerarrow_forwardQ=2000J Tout=? V(m/s) D=0.1m air Air at (2.95x10^2) K is entering in a circular pipe at 101325 Pa as shown in Figure. The velocity of the air at the pipe entrance is (1.5000x10^0) m/s. The diameter of the pipe is 0.1m. Specific gas constant of air is 287 J/kg-K. Specific heat of air is 100O J/kg-K. Find the outlet temperature if 2000 J of heat is added to the pipe. Answer should be in 'K' with three significant figures. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: Activate Windows Go to Settings to activat (? 9°C ENG 2020arrow_forwardQ=2000J Tout=? V(m/s) D=0.1m air Air at (3.050x10^2) K is entering in a circular pipe at 101325 Pa as shown in Figure. The velocity of the air at the pipe entrance is (1.50x10^0) m/s. The diameter of the pipe is 0.1m. Specific gas constant of air is 287 J/kg-K. Specific heat of air is 1000 J/kg-K. Find the outlet temperature if 2000 J of heat is added to the pipe. Answer should be in 'K' with three significant figures. Note: Your answer is assumed to be reduced to the highest power possible. Your Answer: x10 Answer DELLarrow_forward
- An isosceles triangle channel having an apex angle of 60 ° and length of 20 m is being heated uniformly with electric heaters. Water flows through this channel with an inlet temperature of 15 °C and mass flow rate of 1 kg/s and is 10 m being heated to 45 °C at the exit of the tube. Assuming the water flow is fully developed through the channel what is the average convection heat transfer coefficient? Also determine the pumping power. 10 m 16 marrow_forwardThe double pipe 1 m length heat exchanger is essentially a set of concentric pipes. One fluid flows within the smaller pipe and the other in the annulus. For such an exchanger (outer diameter of the inside pipe is 2 cm; inner diameter of the outside pipe is 4 cm), water flows in the annular space at an average velocity of 0.2 m/s. The water, which cools an organic flowing in the central pipe, has a temperature change from 16 to 28 . In this case calculate the heat transfer coefficient for the water assuming that the exchanger is heavily insulated and that the wall temperature on the inside of the annulus (outside of central pipe) is 30 . And heat transfer rate=?, heat transfer flux=?arrow_forwardQ2l Calculate size of each part for the air conditioning ducts system shown in Figure(1) by using equilibrium pressure drop method. The velocity of air in main duct 7 m/s. Tabulate the results (velocity value, rate of pressure drop, circular diameter, and air flow rate) for each part, then convert circular ducts to equivalent rectangle ducts at height 300 mm for all system. 0.5 m³/s E 5m A D 0.5m³/s 3m B Figure (1) 3m 3m 5m C 1 m³/sarrow_forward
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- In a large student house in Sheffield, cold water is supplied by the mains water supply at a pressure of 2 bar, gauge, and at a temperature 10°C. A wash basin cold tap is located 3 meters above the mains supply, connected to the mains pipe with a copper pipe of internal diameter 15 mm and length 12 meters. When the tap is opened the flow rate of water out of the tap is 24 litres per minute, creating a Fanning friction factor in the pipe of 0.008. а) Calculate the Reynolds number of the water in the pipe and determine if it is laminar or turbulent. b) Calculate the pressure loss from friction, change in elevation, and hence the pressure of the water just before entering the tap. c) Name two assumptions that have been made in order to arrive at your answer to part b) and state if these assumptions under or over predict the pressure of the water just before entering the tap. d) If the value were not given, what procedure would be needed to determine the Fanning friction factor?arrow_forwardIn a large student house in Sheffield, cold water is supplied by the mains water supply at a pressure of 2 bar, gauge, and at a temperature 10°C. A wash basin cold tap is located 3 meters above the mains supply, connected to the mains pipe with a copper pipe of internal diameter 15 mm and length 12 meters. When the tap is opened the flow rate of water out of the tap is 24 litres per minute, creating a Fanning friction factor in the pipe of 0.008. a) Calculate the Reynolds number of the water in the pipe and determine if it is laminar or turbulent.arrow_forwardExternal Problem 1: Conservation of mass Two circular pipes are located around a small water container as shown in the figure. Q=0.001 mis D; = 10 cm D; = 5 cm Water Vi = 0.5 m's The flow entering the container in a 5 cm diameter pipe hus 0.5 m's uniform velocity. Water is supplied steadily from the top surface of the container with a volume flow rate 0.001 m/s. Flow exits the container in a 10 cm diameter pipe with a non-uniform velocity distribution, which is: D, where r, man Assume a steady incompressible flow where water level in the container remains the sume. a) Determine the water volume flow rate leaving the container b) Determine the maximum velocity (Vmas)arrow_forward
- Principles of Heat Transfer (Activate Learning wi...Mechanical EngineeringISBN:9781305387102Author:Kreith, Frank; Manglik, Raj M.Publisher:Cengage Learning