In a geothermal power plant, the used geothermal water at 80°C enters a 15-cm-diameter and 400-m-long uninsulated pipe at a rate of 8.5 kg/s and leaves at 70°C before being reinjected back to the ground. Windy air at 15°C flows normal to the pipe. Disregarding radiation, determine the average wind velocity in km/h.

Q: Air at 20°C enters a heated circular tube with a diameter of 50 mm and a length of 3 m. The mass…

A: for answers apply heat balance equation.for solution refer below images.

Q: A 5 kg/s air enters a device with an initial pressure of 750 kPa, initial velocity of 65 m/s and…

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Q: In a condenser, saturated water vapour flows through cool water pipes, condenses on the surface of…

A: Copper tube diameter, d=4 cm =0.04 mAverage velocity of water through the tube, V=3 m/sWater inlet…

Q: A 6-m-tall chimney is to bedesigned to discharge hot gases from a fireplace at 1808C at aconstant…

A: Given data: Height of the chimney, h =6m Discharge Q =0.15 m3/sec Chimney entrance loss coefficient,…

Q: 90 W of energy is dissipated in 2-m-long horizontal pipe whose diameter is 16 cm. The pipe is cooled…

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Q: an adiabatic circular section nozzle

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Q: The average convection heat transfer coefficient during this cooling process is ____ W/m2·°C

A: Given DataThe steel ballDensity ρ = 8055 kg/m3Specific heat cp = 480 J/kg·KThe diameter  D =0.15…

Q: The velocity profile in fully developed laminar flow in a circular pipe, in m/s, is given by u(r) =…

A: Given data  velocity profile of the flow in pipe as  To determine  Radius of the pipe Average…

Q: Air at 10oC enters a 10-cm-diameter and 4-m-long pipe at a rate of 0.035 kg/s. The inner surface of…

A: Given:Air inlet temperature, Tin = 10°CPipe diameter, D = 10 cm = 0.1 mPipe length, L = 4 mMass flow…

Q: An array of power transistors, dissipating 6W of power each, are to be cooled by mounting them on a…

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Q: Heat transfers   Air is to be heated from 15 C to 270 C, as it flows through a tube 25mm diameter…

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Q: Let's practice how to use energy conservation in conjunction with Nusselt number correlations. A…

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Q: Cold air enters the mixing chamber at 85°C and 105 kPa at a rate of 0.55 m /s, while warm air enters…

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Q: Consider water is flowing through a pipe with a 10 cm diameter at a flow rate of 0.2 kg/s. The inlet…

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Q: Hot air at atmospheric pressure and 85°C enters a 10-m-long uninsulated square duct of cross section…

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Q: Liquid water flows in a circular tube at a mass flow rate of 0.006 kg/s. The water enters the tube…

A: A mass flow rate of = 0.006 kg/s.The water enters the tube at The average convection heat transfer…

Q: Air at 60°C leaves a furnace and passes through a 12-m long, 20-cm × 20-cm square duct at an average…

A: Given data as per the question The temperature of air = 60°C  Length of duct =12 m Area =20 × 20 cm2…

Q: An insulated pipe, D=26-cm-in diameter and L=15-m-long, is used to transport cold air at…

A: y6

Q: A 5m copper tube is heated externally to 100degC. Air is heated by passing it through the 40mm…

A: Given Temperature, T1 = 100oC Inlet temperature, Ti = 20 oC Exit temperature, Te = 88 oC Diameter, d…

Q: A steam condenser is supplied with steam, which has a specific enthalpy (calculated above 0 C) of…

A: Given, At inlet condition of condenser,h1=2.2MJ/kgv1=70m/smass flow rate, m˙=2200kg/hAt outlet…

Q: Water at 15°C is to be heated to 65°C by passing it over a bank of resistance heating rods 4 m long…

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Q: A 25-cm-diameter stainless steel ball (r = 8055 kg/m3, cp 480 J/kg·°C) is removed from the oven at a…

A: Given data Diameter of the steel ball = 25 cm = 0.25m Density of the ball = 8055kg/m3 Specific heat…

Q: Carbon dioxide flows steadily through a varying cross-sectional area duct such as a nozzle shown in…

A: Given data m=3 kg/secP1=1400 kPaP2=200 kPaT1=200 °cCp=0.846 kJ/kgKR=0.1889 kJ/kgKγ=1.289

Q: One house owner with a pond on his property has decided to use the pond water to cool his house. His…

A: Given: Diameter of copper tube = 10 cm Temperature of pond water (Tp) = 15°C Temperature of air…

Q: Water from an industrial process flows through a long pipe of diameter 0.2m at a mass flow of 1.25…

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Q: In a food processing plant, hot liquid water is being transported in a pipe (k = 15 W/m .K, D₁ = 2.5…

A: kpipe = 15 W/m.kDi = 2.5cm=0.025mDo= 3cm = 0.03mL = 10 mTi = 100oCTe = 60oCTe 45oCThe properties of…

Q: Air enters a compressor at a temperature of 100 kPa and 25°C and leaves the compressor at a…

A: Given data: The pressure at the entry of the compressor is P1=100 kPa The temperature at the entry…

Q: 8.62, 8-62 Consider a 10-m-long smooth rectangular tube, with a = 50 mm and b = 25 mm, that is…

A: Write the given information.Write the expression of the mean temperature.Write the properties of…

Q: QUESTION 2 (a) Air enters a 10-m-long section of a rectangular duct as showed in Figure 3 of…

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Q: The velocity profile in a fully developed laminar flow of water at 40°F in a 250-ft-long horizontal…

A: Solution : The equation of the velocity profile in a fully developed laminar flow is given as : The…

Q: Liquid water enters a 10-m-long smooth rectangular tube with a -50 mm and b = 25 mm. The surface…

A: Given: The length of tube, L = 10 m The width of tube, a = 50 m The height of tube, b = 25 mm The…

Q: Determine the fuel (in kg) consumed during a 30 minute flight. Assume that changes in air mass flow

A: for solution refer below images.

Q: Determine the length of the pipe required to cool the pasteurized orange juice from 65 to 22 °C at a…

A: Given:For hot fluid:Thi=65 CThe=22 Cmh=1500 Kg/hrd=3 cm =0.03 mTci=4 CTce=20 CU=900 J/m2sC=3890…

Q: Hot air at 1 bar and 80 degree Celcius enters a 8 m long uninsulated square duct of cross-section 20…

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Q: Consider an adiabatic duct of diameter 12 cm with inlet conditions of the velocity, temperature,…

A: at inlet  Mach number  = 0.4 Pressure = 200 kPa Temperature  = 550 K friction factor = 0.021

Q: Liquid water flows in a thin-walled circular tube at a mass flow rate of 11 g/s. The water enters…

A: To obtain the solution to the given question, we need to calculate the heat transfer coefficient…

Q: In an oil cooler, 216 kg/h of hot oil enters a thin metal pipe of diameter 25 mm. An equal mass of…

A: Given Mass flow = 216 kg/h Diameter of the pipe = 25mm Inlet temperature = 420 K Maintained…

Q: Liquid water flows in a thin-walled circular tube at a mass flow rate of 11 g/s. The water enters…

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Q: a rectangular duct made of commercial steel is used to channel air at 1 atm and 35°C at an avergae…

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Q: Water is to be heated from 15 C to 65 C as it flows through a 3 cm internal diameter 5 m long tube.…

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Q: In a heating system, liquid water flows in a circular tube at a mass flow rate of 3.5 g/s. The water…

A: Given Datam˙=3.5×10-3 kg/sTi=5°CCP=4.179kJ/kg.Kh=20W/m2KQ=1025W

Q: Air flows through an uninsulated circular duct of 5 cm diameter at a mass flow rate of 0.03 kg/s.…

A: The convective heat transfer coefficient, h = 55.73 W/m2-K.

Q: There is a washer consisting of a hose connected to a nozzle in the end. The water in it is supplied…

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Q: The compressed air requirements of a textile factory are met by a large compressor that draws in 0.6…

A: Properties of air at 60 degrees Celsius are: The roughness of the galvanized steel pipe is Given…