Tubular heat exchanger design A liquid food (with specific heat 3.9 kJ/[kg °C]) flows in the...
Tubular heat exchanger design
A liquid food (with specific heat 3.9 kJ/[kg °C]) flows in the inner pipe of a double pipe heat exchanger. The liquid food enters the heat exchanger at 72°C and exits at 6°C at a flow rate of 0.5 kg/s. In the annular section, cold water at 2°C enters the heat exchanger and flows concurrently at a flow rate of 12 kg/s. The average specific heat of water is 4.10 kJ/(kg °C). Assuming steady-state conditions. a) Calculate the exit temperature of water. b) Calculate log-mean temperature difference for heat exchanger c) If the length of pipe is 10m and the diameter of the inner pipe carrying liquid food is 10 cm, calculate the average overall heat transfer co-efficient.
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Tubular heat exchanger design
A liquid food (with specific heat 3.9 kJ/[kg °C]) flows in the...
Problem statement: A heat exchanger is required to heat up milk (Specific heat of 3.93 kJ/kg...
Problem statement: A heat exchanger is required to heat up milk (Specific heat of 3.93 kJ/kg K) flowing at 2kg/s from 4 degrees C to 74 degrees C. If water (4.2 kJ/kg K) at 95 C is being used as the hot fluid with flow rate of 8kg/s, determine the length of tubular heat exchanger, if diameter of contact pipe surface between water and milk is 5 cm and overall heat transfer co-efficient is estimated to be 20000 W/m2K. Provide...
(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...
A stream containing ethane gas (C2He) enters the inner pipe of a double-pipe heat exchanger at 40°C and 105 kPa and exits from the pipe at 240*C and the same pressure. Superheated steam at 315 C...
A stream containing ethane gas (C2He) enters the inner pipe of a double-pipe heat exchanger at 40°C and 105 kPa and exits from the pipe at 240*C and the same pressure. Superheated steam at 315 C and 5.0 bars enters the outer (annular) pipe, flowing counter-currently to the ethane, and exits as a saturated vapor at the same pressure. Neglecting the heat losses from the heat exchanger to its surroundings. Draw a diagram of the process. (5) What are the...
Twenty [kw] of heat is to be removed from 375 [k] water flowing at 0.15 [kg/s] into the inner pipe of concentric tube heat exchanger. Cooling water enters the annulus at 290 [k] and leaves at 320...
Twenty [kw] of heat is to be removed from 375 [k] water flowing at 0.15 [kg/s] into the inner pipe of concentric tube heat exchanger. Cooling water enters the annulus at 290 [k] and leaves at 320 [k] with a flow in the opposite direction of the inner flow. The diameter of the thin- walled inner pipe is 2.5 [cm] a) b) c) Calculate the exit temperature of the hot fluid and the mass flow rate of the cold fluid...
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...
Hot and cold water streams exchange heat in a double pipe heat exchanger in counter current...
Hot and cold water streams exchange heat in a double pipe heat exchanger in counter current flow. The pipes are 3 ft long. The inside pipe is a 5/8 inch BWG 12 copper tube. The outside pipe is a 1 inch Sch 40 steel pipe. The outside pipe is insulated to minimize heat loss to the surroundings. The hot water enters the inside tube at 180F with a flow rate such that Re = 10000 The cold water flows through...
A heat exchanger is being investigated as a waste heat recovery device. A heat exchanger is commo...
A heat exchanger is being investigated as a waste heat recovery device. A heat exchanger is common device for using a hot fluid to heat a cold fluid without the fluids mixing. The cold fluid stream of liquid A enters at 294.2 K and leaves the device at a temperature of 330.91 K. Liquid A flows at a rate of 0.006 Kg/s and has a specific heat of 4180 J/(Kg K) and a specific volume of 0.00102 m3/Kg. Liquid B...
An adiabatic heat exchanger is one for which no heat is exchanged with the surroundings. All...
An adiabatic heat exchanger is one for which no heat is exchanged with the surroundings. All of the heat lost by the hot stream is transferred to the cold stream in this adiabatic process. In a proposed process, propane gas enters a continuous adiabatic heat exchanger at 45 °C and 265 kPa and exits at 255 °C. Superheated steam at 300 °C and 7.0 bar enters the exchanger flowing countercurrently to the propane and exits as a saturated liquid at...
[10] Design Problem As shown in the figure below, a double-pipe parallel-flow heat exchanger is used...
[10] Design Problem As shown in the figure below, a double-pipe parallel-flow heat exchanger is used to heat cold fluid which is water (Cp = 4180 J/(kg.K), p = 1000 kg/m) from 20°C to 80°C at a rate of 0.15 kg/s. The heating is to be accomplished by hot fluid, which is geothermal water (Cp = 4310 J/(kg.K), p = 1050 kg/m²) available at 130°C at a mass flow rate of 0.25 kg/s. The inner tube has an inner diameter...
A counter-flow heat exchanger is stated to have an overall heat transfer coefficient of 284 W/m2.K...
A counter-flow heat exchanger is stated to have an overall heat transfer coefficient of 284 W/m2.K when operating at design and clean conditions. Hot fluid enters the tube side at 101°C and exits at 71°C, while cold fluid enters the shell side at 27°C and exits at 42°C. After a period of use, built-up scale in the heat exchanger gives a fouling factor of 0.0004 m2 K/W. The surface area is 93 m². Assume both hot and cold fluids have...
(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...
A stream containing ethane gas (C2He) enters the inner pipe of a double-pipe heat exchanger at 40°C and 105 kPa and exits from the pipe at 240*C and the same pressure. Superheated steam at 315 C and 5.0 bars enters the outer (annular) pipe, flowing counter-currently to the ethane, and exits as a saturated vapor at the same pressure. Neglecting the heat losses from the heat exchanger to its surroundings. Draw a diagram of the process. (5) What are the...
Twenty [kw] of heat is to be removed from 375 [k] water flowing at 0.15 [kg/s] into the inner pipe of concentric tube heat exchanger. Cooling water enters the annulus at 290 [k] and leaves at 320 [k] with a flow in the opposite direction of the inner flow. The diameter of the thin- walled inner pipe is 2.5 [cm] a) b) c) Calculate the exit temperature of the hot fluid and the mass flow rate of the cold fluid...
Hot and cold water streams exchange heat in a double pipe heat exchanger in counter current flow. The pipes are 3 ft long. The inside pipe is a 5/8 inch BWG 12 copper tube. The outside pipe is a 1 inch Sch 40 steel pipe. The outside pipe is insulated to minimize heat loss to the surroundings. The hot water enters the inside tube at 180F with a flow rate such that Re = 10000 The cold water flows through...
[10] Design Problem As shown in the figure below, a double-pipe parallel-flow heat exchanger is used to heat cold fluid which is water (Cp = 4180 J/(kg.K), p = 1000 kg/m) from 20°C to 80°C at a rate of 0.15 kg/s. The heating is to be accomplished by hot fluid, which is geothermal water (Cp = 4310 J/(kg.K), p = 1050 kg/m²) available at 130°C at a mass flow rate of 0.25 kg/s. The inner tube has an inner diameter...
A counter-flow heat exchanger is stated to have an overall heat transfer coefficient of 284 W/m2.K when operating at design and clean conditions. Hot fluid enters the tube side at 101°C and exits at 71°C, while cold fluid enters the shell side at 27°C and exits at 42°C. After a period of use, built-up scale in the heat exchanger gives a fouling factor of 0.0004 m2 K/W. The surface area is 93 m². Assume both hot and cold fluids have...
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