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Question 1 - C1 (4 marks) 150 kg/s of sea water with a salt content of...
10 000 kg/hr of a 5% salt in water solution is fed to a desalination unit...
10 000 kg/hr of a 5% salt in water solution is fed to a desalination unit where the salt is removed from the water to produce fresh water and brine. The desalinated water is to contain no more than 500 ppm salt. The brine (salt solution) waste from the process contains 7.25% salt. To optimize the process, some of the brine waste is recycled to the process. After mixing the process input contains 6% salt. 6.1 Draw a flow diagram...
Membrane Separation II Reverse Osmosis (a) Derive van't Hoff's equation (osmotic pressure π-CRT). (b) A feed solution containing 5g NaCl/L (ρ-1001kg/m3) is purified using a reverse osmosis sy...
Membrane Separation II Reverse Osmosis (a) Derive van't Hoff's equation (osmotic pressure π-CRT). (b) A feed solution containing 5g NaCl/L (ρ-1001kg/m3) is purified using a reverse osmosis system. Water permeability constant (Aw) and a solute (NaCI) permeability constant (As) are 5 x 10 kg/m2s atm, and 4 x 10-7m/s, respectively. AP 30 atm. Assume that the fraction recovered of the solvent water is 0.15. The flow rate q2 of the permeate water solution is 50 L/min. Calculate ci and c2...
QUESTION 4 (25 marks) Water (Cr 4.208 kJ/kg.K) at flow rate of 5.11 kg/s s heated from 78°C to 98°C in an economize...
QUESTION 4 (25 marks) Water (Cr 4.208 kJ/kg.K) at flow rate of 5.11 kg/s s heated from 78°C to 98°C in an economizer inside a boiler. The boiler is a cross flow heat exchanger with single pass, shell fluid mixed and other fluid unmixed. The average water velocity in the 1.5 cm diameter (D) tube is 1.27 m/s. On the shell side, hot air (C,-1.0341 kJ/kgK) was used as the heating fluid with 7.3 kg/s of it entering the exchanger...
Question 4:(15 Marks) On a construction Site, the soil Bulk density and water Content have been...
Question 4:(15 Marks) On a construction Site, the soil Bulk density and water Content have been measured as P-1800 kg/m' and w-20 %. G,- 2.65. Yw- 9.81 kN/m Determine: 4. S (degree of Saturation) .p( dry density) 3. n (porosity) e (void ratio) 2.
Question 4 Liquid water enters a feedwater heater at inlet 1 with inlet conditions 15 MPa,...
Question 4 Liquid water enters a feedwater heater at inlet 1 with inlet conditions 15 MPa, 40°C at 60 kg/s. Another stream of water in saturated mixture enters the heater at inlet 2 at temperature of 175 °C. The heater operates at steady state and heat transfer to surrounding can be neglected. At exit 3, saturated liquid flows out at 275 kPa. Select two (2) different values of mixture quality at inlet 2 between 0.5 and 0.8, and subsequently plot...
Water entering a wet cooling tower at 35°C at a rate of 100 kg/s is cooled to 22°C in the cooling tower by air that enters the tower at 1 atm, 20°C, and 60% relative humidity and leaves saturated at 3...
Water entering a wet cooling tower at 35°C at a rate of 100 kg/s
is cooled to 22°C in the cooling tower by air that enters the tower
at 1 atm, 20°C, and 60% relative humidity and leaves saturated at
30°C. The makeup water of 22°C is supplied to the outlet to make
the mass flow rate of the cool water the same as that at the inlet,
see Figure Q5.
Q.5Water entering a wet cooling tower at 35°C at...
Question 3 (40 marks) (a) Air enters a horizontal nozzle with a velocity of 1 m/s,...
Question 3 (40 marks) (a) Air enters a horizontal nozzle with a velocity of 1 m/s, a pressure of 2 bar and a temperature of 350 K. At exit from nozzle, the air temperature is 450 K. The combined rate of specific heat transfers, and specific work transfers, w to the air as it passes through the nozzle is 150 kJ/kg. Assume that the air flow is steady and air can be treated as perfect gas with = 1005 J/(kg.K)....
7) (7 marks) Water (p = 1000 kg/m?, v = 1 x 10-6 m²/s) for an...
7) (7 marks) Water (p = 1000 kg/m?, v = 1 x 10-6 m²/s) for an irrigation system is to be pumped through a pipe from a reservoir to crop fields that are a distance along the ground of 1.1 km from the reservoir. The fields are at an elevation that is 20 m above the reservoir. The diameter of the pipe is 0.2 m. The required volume flow rate is 0.2 m/s. The steel pipe has an average roughness...
Can you please answer the following question 0. (CLO6 - 4 Marks) A counter-flow double-pipe heat...
Can
you please answer the following question
0. (CLO6 - 4 Marks) A counter-flow double-pipe heat exchanger is to heat water from 20°C to 80°C at mass flow rate of 1.5 kg's. The heating is to be accomplished by hot oil available at 150C at a mass flow rate of 2.5 kg/s. The inner tube is thin-walled and has a diameter of 1.5 cm with the length of 60 m. Fluid property: Fluid Type Mass flow rate, The Specific heat,...
Question 3 A counter flow single pass double pipe heat exchanger is supplied with hot water...
Question 3 A counter flow single pass double pipe heat exchanger is supplied with hot water at 120°C that is to be cooled by water entering at 20°C. The mass flow rate of the hot stream is 5 kg/s, and that of the cold stream is 6 kg/s. The specific heat capacity of both fluids may be taken as 4180 J/kg.K. The overall U value is 1500W/m2.K, and the surface area for heat transfer is 20 m2 a) Determine the...
10 000 kg/hr of a 5% salt in water solution is fed to a desalination unit where the salt is removed from the water to produce fresh water and brine. The desalinated water is to contain no more than 500 ppm salt. The brine (salt solution) waste from the process contains 7.25% salt. To optimize the process, some of the brine waste is recycled to the process. After mixing the process input contains 6% salt. 6.1 Draw a flow diagram...
Membrane Separation II Reverse Osmosis (a) Derive van't Hoff's equation (osmotic pressure π-CRT). (b) A feed solution containing 5g NaCl/L (ρ-1001kg/m3) is purified using a reverse osmosis system. Water permeability constant (Aw) and a solute (NaCI) permeability constant (As) are 5 x 10 kg/m2s atm, and 4 x 10-7m/s, respectively. AP 30 atm. Assume that the fraction recovered of the solvent water is 0.15. The flow rate q2 of the permeate water solution is 50 L/min. Calculate ci and c2...
QUESTION 4 (25 marks) Water (Cr 4.208 kJ/kg.K) at flow rate of 5.11 kg/s s heated from 78°C to 98°C in an economizer inside a boiler. The boiler is a cross flow heat exchanger with single pass, shell fluid mixed and other fluid unmixed. The average water velocity in the 1.5 cm diameter (D) tube is 1.27 m/s. On the shell side, hot air (C,-1.0341 kJ/kgK) was used as the heating fluid with 7.3 kg/s of it entering the exchanger...
Question 4:(15 Marks) On a construction Site, the soil Bulk density and water Content have been measured as P-1800 kg/m' and w-20 %. G,- 2.65. Yw- 9.81 kN/m Determine: 4. S (degree of Saturation) .p( dry density) 3. n (porosity) e (void ratio) 2.
Question 4 Liquid water enters a feedwater heater at inlet 1 with inlet conditions 15 MPa, 40°C at 60 kg/s. Another stream of water in saturated mixture enters the heater at inlet 2 at temperature of 175 °C. The heater operates at steady state and heat transfer to surrounding can be neglected. At exit 3, saturated liquid flows out at 275 kPa. Select two (2) different values of mixture quality at inlet 2 between 0.5 and 0.8, and subsequently plot...
Water entering a wet cooling tower at 35°C at a rate of 100 kg/s
is cooled to 22°C in the cooling tower by air that enters the tower
at 1 atm, 20°C, and 60% relative humidity and leaves saturated at
30°C. The makeup water of 22°C is supplied to the outlet to make
the mass flow rate of the cool water the same as that at the inlet,
see Figure Q5.
Q.5Water entering a wet cooling tower at 35°C at...
Question 3 (40 marks) (a) Air enters a horizontal nozzle with a velocity of 1 m/s, a pressure of 2 bar and a temperature of 350 K. At exit from nozzle, the air temperature is 450 K. The combined rate of specific heat transfers, and specific work transfers, w to the air as it passes through the nozzle is 150 kJ/kg. Assume that the air flow is steady and air can be treated as perfect gas with = 1005 J/(kg.K)....
7) (7 marks) Water (p = 1000 kg/m?, v = 1 x 10-6 m²/s) for an irrigation system is to be pumped through a pipe from a reservoir to crop fields that are a distance along the ground of 1.1 km from the reservoir. The fields are at an elevation that is 20 m above the reservoir. The diameter of the pipe is 0.2 m. The required volume flow rate is 0.2 m/s. The steel pipe has an average roughness...
Can
you please answer the following question
0. (CLO6 - 4 Marks) A counter-flow double-pipe heat exchanger is to heat water from 20°C to 80°C at mass flow rate of 1.5 kg's. The heating is to be accomplished by hot oil available at 150C at a mass flow rate of 2.5 kg/s. The inner tube is thin-walled and has a diameter of 1.5 cm with the length of 60 m. Fluid property: Fluid Type Mass flow rate, The Specific heat,...
Question 3 A counter flow single pass double pipe heat exchanger is supplied with hot water at 120°C that is to be cooled by water entering at 20°C. The mass flow rate of the hot stream is 5 kg/s, and that of the cold stream is 6 kg/s. The specific heat capacity of both fluids may be taken as 4180 J/kg.K. The overall U value is 1500W/m2.K, and the surface area for heat transfer is 20 m2 a) Determine the...
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