Question

In: Mechanical Engineering

Air, at p = 1 atm and a temperature of 60 ° C enters a thin-walled...

Air, at p = 1 atm and a temperature of 60 ° C enters a thin-walled (d = 5.0 mm) and long (l = 3 m) tube. A constant thermal flow is applied to the air from the tube walls. The mass air flow is 1.5x10^(-04) kg / s. If the temperature on the surface of the tube at its outlet is 120 ° C, determine the rate of heat transfer entering the tube. Use the air properties for 400 K.

Solutions

Expert Solution

samet mamat answered 1 year ago
Next > < Previous

Related Solutions

Air enters a thin-walled, 5-mm diameter, 2-m-long tube at a uniform inlet temperature of 100°C. A...
Air enters a thin-walled, 5-mm diameter, 2-m-long tube at a uniform inlet temperature of 100°C. A constant heat flux is applied to the air from the tube surface. The mean temperature of air at halfway along the tube (at 1 m length) is reported as 126°C. If the tube surface temperature at the exit is 160°C and the local heat transfer coefficient at the exit is 29.5 W/m^2K, determine a) the applied heat flux, b) the rate of energy increase...
A thin plate is suspended in air at 1 atm. with T_infinite= 15°C. Air flows on...
A thin plate is suspended in air at 1 atm. with T_infinite= 15°C. Air flows on both sides of the plate where the bottom side absorbs a uniform radiative heat flux of 1542 W/m2. The plate is oriented parallel to the flow and the length along the flow direction is 60 cm. Consider the plate is negligibly thin and the width of the plate (perpendicular to the flow) is large, so that the problem can be considered as a 2D...
Air enters a 30-cm-diameter cooling section at 1 atm, 35 C, and 60 percent relative humidity...
Air enters a 30-cm-diameter cooling section at 1 atm, 35 C, and 60 percent relative humidity at 120 m/min. The air is cooled by passing it over a cooling coil through which cold water flows. The water experiences a temperature rise of 8 C. The air leaves the cooling section saturated at 20 C. (a) Determine the rate of heat transfer. Round your answer to the nearest tenth.      Qout = _____ kJ/min (b) Determine the mass flow rate of...
Air at a pressure of 1 atm and a temperature of 50°C is in parallel flow...
Air at a pressure of 1 atm and a temperature of 50°C is in parallel flow over the top surface of a flat plate that is heated to a uniform temperature of 100°C. The plate has a length of 0.24 m (in the flow direction) and a width of 0.12 m. The Reynolds number based on the plate length is 30,000. (a) What is the rate of heat transfer from the plate to the air? (b) If the free stream...
Forced convection A thin plate is suspended in air at 1 atm. with T? = 15°C....
Forced convection A thin plate is suspended in air at 1 atm. with T? = 15°C. Air flows on both sides of the plate where the bottom side absorbs a uniform radiative heat flux of 1542 W/m2. The plate is oriented parallel to the flow and the length along the flow direction is 60 cm. Consider the plate is negligibly thin and the width of the plate (perpendicular to the flow) is large, so that the problem can be considered...
Moist air enters an adiabatic humidifier system at 1 atm, 15 °C, with a relative humidity...
Moist air enters an adiabatic humidifier system at 1 atm, 15 °C, with a relative humidity of 20%. The volumetric flow rate of the incoming moist air is 150 m3/min. Saturated water vapor at 1 atm is injected into the flow such that the outlet temperature is 30 °C and the outlet relative humidity is 40%. The pressure is constant in the humidifier system. Determine the mass flow rate of the saturated water vapor entering the humidifier at state 3,...
The air in a room has a pressure of 1 atm, a dry-bulb temperature of 24°C,...
The air in a room has a pressure of 1 atm, a dry-bulb temperature of 24°C, and a wetbulb temperature of 17°C. Using the psychrometric chart, determine (a) The specific humidity, (b) The enthalpy, in kJ/kg dry air, (c) The relative humidity, (d) The dew-point temperature, and (e) The specific volume of the air, in m3/kg dry air.
Air enters a counter-flow drier at 70˚C dry bulb temperature and 20˚C dew point temperature. Air...
Air enters a counter-flow drier at 70˚C dry bulb temperature and 20˚C dew point temperature. Air leaves the drier at 40˚C and 60% relative humidity. The initial moisture content of the product is 82% (wet basis). The amount of air moving through the drier is 2000kg of dry air per hour. The mass flow rate of the product is 10kg dry solid per hour. What is the final moisture content of the dried product in wet basis?
Air enters a counter-flow drier at 70˚C dry bulb temperature and 20˚C dew point temperature. Air...
Air enters a counter-flow drier at 70˚C dry bulb temperature and 20˚C dew point temperature. Air leaves the drier at 40˚C and 60% relative humidity. The initial moisture content of the product is 82% (wet basis). The amount of air moving through the drier is 2000kg of dry air per hour. The mass flow rate of the product is 10kg dry solid per hour. What is the final moisture content of the dried product in wet basis?
Air enters a window air conditioner at 1 atm, 36oC and 75% relative humidity (??) at...
Air enters a window air conditioner at 1 atm, 36oC and 75% relative humidity (??) at a rate of 12m3/min and it leaves as saturated air at 18oC. Part of the moisture in the air which condenses during the process is also removed at 18oC. Determine (a) the rate of heat (Q?) and (b) moisture removal from the air. (c) What-if Scenario: What would the rate of heat removal be if moist air entered the dehumidifier at 95 kPa instead...
ADVERTISEMENT
Subjects
ADVERTISEMENT
Latest Questions
ADVERTISEMENT