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A cylindrical storage tank for the collector in Problem 2 is located in the basement of the dwelling it serves. If the basement temperature is 16°C and the storage tank is 70°C, what is the heat-loss rate from the tank? The tank is a cylinder with diameter equal to its height; it is insulated with a 15-cm-thick fiberglass batt.
Problem 2
A packed bed storage system consists of a bed of crushed rock. The average diameter of the particles is 35 mm, and the sphericity was determined to be 0.75. Air is used as the heat-transfer fluid and flows through the system with a superficial bed velocity of 0.90 m/s. Calculate the pressure drop per unit length, assuming the air density is 1.15 kg/m3 and the air viscosity is 1.903 × 10-5 kg/m·s. How does this compare to the pressure drop when the particle diameter is 50 mm?
The rate of heat addition to an air-standard Brayton cycle is 5.2 × 108 Btu/ h. The pressure ratio for the cycle is 12 and the minimum and maximum temperatures are 520°R and 2800°R, respectively. Determine the thermal efficiency of the cycle.
The gutter is designed for a sudden rainstorm of up to 5 inches per hour. For this condition, what is the maximum roof area that can be drained successfully?
For the preferred paint of part (a), determine the steady-state value of the outer surface temperature Ts,o. The boundary layer is tripped at the leading edge of the roof, and turbulent flow may be assumed to exist over the entire roof. Properties..
two parallel opposing forces are located 6 meters apart. the force on the left is directed downward and is 4 kn. the
you have an electrical heater to heat-treat polymers. according to the manufacturers manual the heat flux at the
Water flows from the bottom of a large tank where the pressure is 120 psia to a turbine located 65 ft below the bottom of the tank that produces 40 hp. The pressure at the turbine exit is 42 psia and the water velocity is 36 ft/sec. The flow rate of ..
The temperature outside a house is -20-C and inside it is 20-C. What is the ratio of the density of the outside air to the density of the inside air? Would in?ltration, which results from cracks around the windows, doors, and siding, etc., occur e..
2 kg of saturated liquid water at 1bar is compressed to 25bar and 100C in a water pump. Determine the change in internal energy (kJ) and enthalpy (kJ) of water in two ways. Using the compressed liquid tables
a gate is 0.5 m wide and 0.6 m tall and is hinged at the bottom. on one side the gate holds back a 0.5 m deep body of
Consider the mass and pulley system shown. Mass m1 = 33kg and mass m2 = 13kg . The angle of the inclined plane is given, and the coefficient of kinetic friction between mass m2 and the inclined plane is μk=0.19.
rigid beam abc is supported as shown in figure p4.10. the pin connections at b c and d are each double shear
A rocket of mass 2000 Kg is accelerating at 4m/sec2 here on planet earth, what is the weight of the rocket
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