Solvent Extraction: Calculation of the Number of Stages Required

Problem: 60 tons per day of oil-sand (25 mass % oil and 75 mass % sand) is to be extracted with 40 tons per day of naphtha in a counter-current extraction battery. The final extract from the battery is to contain 40 mass % oil and 60 mass % naphtha and the underflow from each unit is expected to consist of 35 mass % solution and 65 mass % sand. If the overall efficiency of the battery is 50%, how many stages will be required?

Fourier's Law of Conduction Problems

Please see the attached files for the fully formatted problem(s). Problem 1.1 A perfectly insulated having dimension 12 ft*12 ft*12 ft Heater having power = 10KW Heater starts at time t = 0 Now using energy conservation law Heat given by the heater = heat taken The limit of following integration will be For left hand side 0 to tf And for right hand side 303K to T ∫ 10000 dt = n ∫ Cp*dT ------ (1) Problem 1.2 In this problem we will use the formula of Fourier’s law of conduction in which we will equal it for both cases... Problem 1.3 This is the question which tells us about the thermal conductivity changes with temperature as follows given in the question k =... click for more

Newton's Law of Cooling Problem: Rate of Ice Melting

Please see the attached file for the fully formatted problem(s). Cubical capacity width = 0.5m Thickness = 3 cm In a cube there will be of 6 faces so for determining surface area for heat transfer we will have to multiplied by 6 with area So surface area for heat transfer = 6*(width) 2 =6*(0.5)2 A =1.5 m2 It can be calculated by Newton’s law of cooling...

basic concepts -- conduction, convection, radiation

I'm having trouble in my Heat Transfer class and need a better overall understanding of Heat concepts. Please help me grasp the following four things about this assignment: 1) Basic concept this assignment is related to 2) Key equation/formula needed for this assignment 3) Any other basic fundamental concept(s) needed for this assignment 4) Anything to watch out for

Unit Length Heat Loss and Describing a Thermal Circuit

Please see the attached file for the fully formatted problem(s). Find unit length heat lost and describe the thermal circuit. Copper pipe inside radius r1 = 1cm And thickness of pipe = 0.3 cm So pipe outside radius r2 =1.3cm Thickness of insulated material = 1cm Radius of pipe with insulation r3 =2.3cm Thermal conductivity of insulated material k2 = 0.024 W/mK Inside pipe temperature T1 = 1000C Surrounding temperature T2 = 200C Heat transfer coefficient h2 = 50W/m2K Radiation coefficient hr = 30W/m2K