An electric heater is immersed in a well-stirred tank. Solvent at 19°C, which has a heat capacity of 2.1 kJ/(kg°C), is fed at a speed of 11 kg/h. The hot solvent is discharged at the same rate. The tank initially contains 180 kg of cold solvent at 10°C. The heat flow of the electric heater is 884 W.
Write the differential equation along with its initial condition.
An electric heater is immersed in a well-stirred tank. Solvent at 19°C, which has a heat...
An electric heater is immersed in a well-stirred tank. Solvent at 19°C, which has a heat capacity of 2.1 kJ/(kg°C), is fed at a speed of 11 kg/h. The hot solvent is discharged at the same rate. The tank initially contains 180 kg of cold solvent at 10°C. The heat flow of the electric heater is 884 W. Do the following: a) Draw the system with all its variables. b) Write the differential equation along with its initial condition. c)...
An electric heater is immersed in a well-stirred tank. Solvent at 19°C, which has a heat capacity of 2.1 kJ/(kg°C), is fed at a speed of 11 kg/h. The hot solvent is discharged at the same rate. The tank initially contains 180 kg of cold solvent at 10°C. The heat flow of the electric heater is 884 W. Calculate the time for the temperature of the solvent being discharged to be 63°C (write the answer in hours and with two...
An electric heater is immersed in a well-stirred tank. Solvent at 17 ° C, which has a heat capacity of 2.1 kJ / (kg ° C), is fed at a rate of 15 kg / h. The hot solvent is discharged at the same rate. The tank initially contains 120 kg of cold solvent at 6 ° C. The heat flow of the electric heater is 886 W. Do the following: Draw the system with all its variables Write the...
2. In the constant volume, stirred-tank heater shown in the figure below, the flow rates and material properties are held constant. The tank contains a heating element, which is initially off and the tank is the same temperature as the inlet stream. When t=0, the heater is turned on to a constant heating rate Q. For this material, assume C = C = Cp = Cy. m,Ti P,V,C, T(t) ń, r(t) o a. Write a transient thermal energy balance to...
A tank initially contains 3 m3 of water at 15 ° C, which is heated by a coil that supplies 1,250 kcal / min. Water is fed to the tank at a rate of 300 L / min at 65 ° C and is discharged at 400 L / min. It considers a density of 1.0 kg / L for water and a Ĉp of 1.0 kcal / kg K. The agitator in the tank has a 5 HP motor....
(3 points) Consider the two tank apparatus shown in the figure. Each tank has capacity 950950 liters and initially contains 100100 liters of fresh water. At time t=0t=0, the well-stirred mixing process begins. Suppose that the concentration of brine flowing into Tank 1 via the top tube is 11 kilograms per liter, and that the flow rates are r1=r3=4r1=r3=4 liters per minute, and r2=r4=13r2=r4=13 liters per minute. (a) Determine the volume of solution in each tank as a function of...
(1 point) Consider the two tank apparatus shown in the figure. Each tank has capacity 750 liters and initially contains 150 liters of fresh water. At time t = 0, the well-stirred mixing process begins. Suppose that the concentration of brine flowing into Tank 1 via the top tube is 0.75 kilograms per liter, and that the flow rates are r = 13 = 3 liters per minute, and r2 = 14 = 10 liters per minute. (a) Determine the...
A bituminous coal is burned with air in a boiler furnace. The coal is fed at a rate of 40000 kg/h and has an ultimate analysis of 76wt% C, 5wt% H, 8wt% O, negligible amounts of N and S, and 11wt% non-combustible ash. Air enters a preheater at 30 °C and 1 atm with a relative humidity of 30%, exchanges heat with the hot flue gas leaving the furnace and air enters the furnace at temperature Ta (°C). The flue...
1. 1. The primary energy savings in tep (1 MWh -0.086 tep) and diesel, which involves the direct use of heat from a geothermal resource to cover a heat demand of 100 kW for 3,500 h / year, assuming that this demand will be covered with diesel boiler of average yield 0.8 (for diesel 1.12 tep/ton gas oil), they are: a) 30.1 tep/year, 26.9 ton/year b) 37.6 tep/year, 33.6 ton/year c)41.2 tep/year, 36.8 ton /year 1. 2. A hydraulic pump...
Two large parallel plates with surface conditions approximating those of a blackbody are maintained at 800°C and 100°C, respectively. Determine the rate of heal transfer by radiation between the plates in Wim and the radiative heat transfer coefficient in W/m K ) 12 Write down the one-dimensional sent heal conduction equation for a plane wall with constant thermal conductivity and heat generation in its simplest form, and indicate what each variable represents 13 Write down the one-dimensional transient heat conduction...