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Water enters a tube at 27°C with a flow rate of 450 kg/h. The heat transfer from the tube wall to the fluid is given as q's (W/m) = ax
What is the pressure drop associated with water at 27°C flowing with a mean velocity of 0.2 m/s through a 600-m-long cast iron pipe of 0.15-m inside diameter
What is the critical heat flux for boiling water at 1 atm on a large horizontal surface on the surface of the moon, where the gravitational acceleration
What is the convection mass transfer coefficient associated with fully developed atmospheric airflow at 27°C and 0.04 kg/s through a 50-mm-diameter
We wish to determine the effect of adding a layer of magnesia insulation to the steam pipe of the foregoing problem
Two long copper rods of diameter D = 10 mm are soldered together end to end, with solder having a melting point of 650°e.
Two parallel pipelines spaced 0.5 m apart are buried in soil having a thermal conductivity of 0.5 W/m · K. The pipes have outer diameters of 100 and 75 mm
Two stainless steel plates (p = 8000 kg/m3, c = 500 J/kg · K, k = 15 W/m · K), each 20 mm thick and insulated on one surface, are initially at 400 and 300 K
Use a flux plot to estimate the rate of heat flow through the object shown in the sketch. The thermal conductivity of the material is 15 W/(m K).
Unique characteristics of biologically active materials such as fruits, vegetables, and other products require special care in handling.
Two stainless steel plates 10 mm thick are subjected to a contact pressure of I bar under vacuum conditions for which there is an overall temperature drop
Velocity and temperature profiles for laminar flow in a tube of radius ro = 10 mm have the form u (r) = 0.1 [1 - (r/ro)2] T(r) = 344.8 + 75.0(r/ro)2
Using the naphthalene sublimation technique, the radial distribution of the local convection mass transfer coefficient for uniform flow normal to a circular
Water at 27°C flows with a mean velocity of 1 m/s through a l-km-long pipe of 0.25-m inside diameter.
Water at 20°C and a flow rate of 0.1 kg/s enters a heated, thin-walled tube with a diameter of 15 mm and length of 2 m.
Thermal stress testing is a common procedure used to assess the reliability of an electronic package. Typically, thermal stresses are induced in soldered
To cool a summer home without using a vapor-compression refrigeration cycle, air is routed through a plastic pipe (k = 0.15 W/m · K, Di = 0.15 m, Do = 0.17 m)
To cool electronic components that are mounted to a printed circuit board and hermetically sealed
Turbine blades mounted to a rotating disc in a gas turbine engine are exposed to a gas stream that is at T8 = 1200°C and maintains a convection coefficient
Thin film coatings characterized by high resistance to abrasion and fracture may be formed by using micro-scale composite particles in a plasma spraying process
Thin-walled aluminum tubes of diameter D = 10 mm are used in the condenser of an air conditioner. Under normal operating conditions, a convection coefficient
To assess the efficacy of different liquids for cooling an object of given size and shape by forced convection it is convenient to introduce figure of merit
To assess the efficacy of different liquids for cooling by natural convection it is convenient to introduce a figure of merit. F N, which combines
The tip of a soldering iron consists of a 0.6-cm-OD copper rod, 7.6 cm long. If the tip must be 204°C, what is the required minimum temperature of the base
The top surface (0.5 m x 0.5 m) of an oven is 60°C for a particular operating condition when the room air is 23°C.