Oil at 500K is to be cooled at a rate of 5000 kg/hr in a counter-current...
Oil at 500K is to be cooled at a rate of 5000 kg/hr in a counter-current exchanger using cold water available at 295K. A temperature approach of 10K is to be maintained at both ends of the exchanger. The specific heats of oil and water are respectively 3.2 and 4.2 KJ/Kg K. Determine the total entropy change of the process.
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Oil at 500K is to be cooled at a rate of 5000 kg/hr in a
counter-current...
(b) Exhaust gases flowing through a tubular heat exchanger at the rate of 0.3 kg/s are cooled from 400 to 120°C by w...
(b) Exhaust gases flowing through a tubular heat exchanger at the rate of 0.3 kg/s are cooled from 400 to 120°C by water initially at 10°C. The specific heat capacity of the exhaust gases and water may be taken as 1.13 and 4.19 kJ/kg°C, respectively, and the overall heat transfer coefficient from gases to water is 140 W/m2°C. Calculate the surface area required when the water flow rate is 0.4 kg/s for (6 marks) (4 marks) (i) (ii) Parallel flow...
Help me!!!! Q2. Heat exchanger-NTU method (34 pt). An orange juice is being cooled from 85...
Help me!!!!
Q2. Heat exchanger-NTU method (34 pt). An orange juice is being cooled from 85 °C at a rate of 2000 kg/h in a counter-current heat exchanger by cold water. The juice has a specific heat of 3090 J/(kg.K). The cold water enters the heat exchanger at 8°C at a rate of 2950 kg/h、The overall heat transfer coefficient U-485 w/mK and the area A 4.2 m2. Assuming steady-state conditions, calculate: (a) the heat transfer rate (J/s), (b) the exit...
1,711 kg/hr of air flows through a counter-current heat exchanger. On the other side of the...
1,711 kg/hr of air flows through a counter-current heat exchanger. On the other side of the 250 kg/hr of milk flows through the heat exchanger from a pasteurization process at 80°C and requires cooling to 30°C for packaging and storage. What will be the temperature of air outlet in the exchanger if it enters at 18°C? Consider that the Cp of milk is 1.05 cal/(g °C).
Hot water flows thorough a parallel flow heat exchanger at a rate of 10 kg/min and...
Hot water flows thorough a parallel flow heat exchanger at a rate of 10 kg/min and is cooled by a cold water stream of flow rate 25 kg/min. The inlet temperatures of hot and cold water streams are 70 oC and 25 oC, respectively. The outlet temperature of the hot water is expected to be 50 oC. The individual convective heat transfer coefficient on both sides of the heat transfer area is 600 W/m2 .K. Take the specific heat for...
please help me ASAP [10 CO3 6. Obtained an expression for the view factor fi Hot...
please help me ASAP
[10 CO3 6. Obtained an expression for the view factor fi Hot oil is cooled by exchanging heat with water in a heat exchanger. The inlet and outlet temperature of oil are 400 K and 350 K, respectively, and oil flows at the rate of 0.5 kg's Water is used at the rate of 0.4 kg/s to cool the hot oil. The inlet temperature of water is 300 K. Calculate the required heat transfer area for...
Heat transfer project - i need help to see what direction you would take this problem in order to...
heat transfer project - i need help to see what direction you
would take this problem in order to make the design.
Design a counter-flow, concentric-tube heat exchanger to use water forc al power station. The mass flow rate of the oil is given as 0.2 kg/s, and its inlet emperature is 90°C. The water is available at 20°C, but its temperature rise is restricted to 12.5°C of environmental concerns. The outer tube diameter must be less than 5 cm,...
2). A hydrocarbon fluid is to be cooled from 90 to 15 C at a rate...
2). A hydrocarbon fluid is to be cooled from 90 to 15 C at a rate of 9.72 ton per hr. pass shell and tube heat exchanger with the following specification is available A single- Number of tubes 250 1.0 m 23.5 mm 25 mm 15 W m- K-I Tube length Internal tube diameter External tube diameter Thermal conductivity of tube wall Chilled water is supplied at 4C and is normally discharged at 10 C. From experience it is assumed...
A metal part is undergoing a heat-treating process, it has a mass of 12 kg and...
A metal part is undergoing a heat-treating process, it has a
mass of 12 kg and is initially at 950∘C. The part is quenched in a
tank containing 225 kg of water, initially at 35∘C. Consider the
heat transfer between the tank and its surroundings to be
negligible. Taking the specific heat of the metal part and water as
constant at 0.5 kJ/kg.K and 4.2 kJ/kg.K respectively, determine :
The final equilibrium temperature after quenching Tf= ∘C The amount
of...
11.20 Heat exchanger of counter flow arrangement with temperatures at inlet of hot and cold fluids...
11.20 Heat exchanger of counter flow arrangement with temperatures at inlet of hot and cold fluids are (200°C) and (60°C) gave outlet temperature of (110°C) for both sides as the surfaces were clean. After long time of use for same the inlet temperatures and flow rate, the hot fluid outlet was (130°C). Find the change in the overall heat transfer coefficient and the heat transfer values by percentage. Ans.: -37.4%, -22.2% 11.21 A liquid with a specific heat of (3200J/kg....
5 kg of water substance at 1 bar, 400 K, contained in a piston-cylinder apparatus, is...
5 kg of water substance at 1 bar, 400 K, contained in a piston-cylinder apparatus, is compressed to 10 bar, with heat transfer to a reservoir maintained at 350 K; the temperature of the water substance remains constant at 400 K. If the initial and final specific entropies of the water substance are: 7.502 kJ/kg-K and 1.600 kJ/kg-K respectively; (a)How much heat is removed? (b)What is the entropy change of the water substance? (c)What is the entropy change of the...
(b) Exhaust gases flowing through a tubular heat exchanger at the rate of 0.3 kg/s are cooled from 400 to 120°C by water initially at 10°C. The specific heat capacity of the exhaust gases and water may be taken as 1.13 and 4.19 kJ/kg°C, respectively, and the overall heat transfer coefficient from gases to water is 140 W/m2°C. Calculate the surface area required when the water flow rate is 0.4 kg/s for (6 marks) (4 marks) (i) (ii) Parallel flow...
Help me!!!!
Q2. Heat exchanger-NTU method (34 pt). An orange juice is being cooled from 85 °C at a rate of 2000 kg/h in a counter-current heat exchanger by cold water. The juice has a specific heat of 3090 J/(kg.K). The cold water enters the heat exchanger at 8°C at a rate of 2950 kg/h、The overall heat transfer coefficient U-485 w/mK and the area A 4.2 m2. Assuming steady-state conditions, calculate: (a) the heat transfer rate (J/s), (b) the exit...
please help me ASAP
[10 CO3 6. Obtained an expression for the view factor fi Hot oil is cooled by exchanging heat with water in a heat exchanger. The inlet and outlet temperature of oil are 400 K and 350 K, respectively, and oil flows at the rate of 0.5 kg's Water is used at the rate of 0.4 kg/s to cool the hot oil. The inlet temperature of water is 300 K. Calculate the required heat transfer area for...
heat transfer project - i need help to see what direction you
would take this problem in order to make the design.
Design a counter-flow, concentric-tube heat exchanger to use water forc al power station. The mass flow rate of the oil is given as 0.2 kg/s, and its inlet emperature is 90°C. The water is available at 20°C, but its temperature rise is restricted to 12.5°C of environmental concerns. The outer tube diameter must be less than 5 cm,...
2). A hydrocarbon fluid is to be cooled from 90 to 15 C at a rate of 9.72 ton per hr. pass shell and tube heat exchanger with the following specification is available A single- Number of tubes 250 1.0 m 23.5 mm 25 mm 15 W m- K-I Tube length Internal tube diameter External tube diameter Thermal conductivity of tube wall Chilled water is supplied at 4C and is normally discharged at 10 C. From experience it is assumed...
A metal part is undergoing a heat-treating process, it has a
mass of 12 kg and is initially at 950∘C. The part is quenched in a
tank containing 225 kg of water, initially at 35∘C. Consider the
heat transfer between the tank and its surroundings to be
negligible. Taking the specific heat of the metal part and water as
constant at 0.5 kJ/kg.K and 4.2 kJ/kg.K respectively, determine :
The final equilibrium temperature after quenching Tf= ∘C The amount
of...
11.20 Heat exchanger of counter flow arrangement with temperatures at inlet of hot and cold fluids are (200°C) and (60°C) gave outlet temperature of (110°C) for both sides as the surfaces were clean. After long time of use for same the inlet temperatures and flow rate, the hot fluid outlet was (130°C). Find the change in the overall heat transfer coefficient and the heat transfer values by percentage. Ans.: -37.4%, -22.2% 11.21 A liquid with a specific heat of (3200J/kg....
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