Fundamentals of Heat and Mass Transfer – Problem 2.8

A blood warmer is to be used during the transfusion of blood to a patient. This device is to heat blood taken from the Blood Bank at 10°C to 37°C at a flow rate of 200 mL/min. The blood passes through tubing of length 2 m, with a rectangular cross-section of 6.4 mm x 1.6…

The temperature distribution across a wall 0.3 m thick at a certain instant of time is T(x) = a + bx + cx2, where T is in degrees Celsius and x is in meters, a = 200 °C, b = -200 °C /m, and c = 30 °C /m2, The wall has a thermal conductivity…

Heat transfer is a branch of thermal engineering that deals with the production, utilization, transformation, and interchange of thermal energy caused by variations in temperature, leading to changes in temperature distribution. The field of transport phenomena explores the transfer of momentum, energy, and mass through conduction, convection, and radiation. Heat Transfer Background In the early…

Abstract: The purpose of this lab was to determine the effect of stirring and the hot water flow rate on the overall heat transfer coefficient. Based on the law of thermodynamics heat always travels from hot to cold but the rate of heat transfer is expected to be enhanced by the introduction of stirring. During…

The heat flux through a wood slab 50 mm thick, whose inner and outer surface temperatures are 40 and 20 degree C. respectively, has been determined to be 40 W/m2. What is the thermal conductivity of the wood? All sample problems and notes are based on the following textbook: Fundamentals of Heat and Mass Transfer…

An electric resistance heater is embedded in a long cylinder of diameter 30mm. When water with a temperature of 25degree C and velocity of 1 m/s flows crosswise over the cylinder, the power per unit length required to maintain the surface at a uniform temperature of 90degreeC is 28kW/m. When air is also at 25…