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 a clear hand written solution for the derivation and problem
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Problem statement: A heat exchanger is required to heat up milk
(Specific heat of 3.93 kJ/kg...
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)...
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...
Determine the effectiveness of the concentric tube heat exchanger. The working fluid through the heat exchanger...
Determine the effectiveness of the concentric tube heat exchanger. The working fluid through the heat exchanger is water and is flowing at 1 m/min for both cold and hot pipes. The hot water temperature at the tube inlet is 90°C and the temperature at the tube outlet is 60°C. The cold water temperature at the tube inlet is 50°C and the temperature at the tube outlet is 80°C. Assume the density and the specific heat of water are 988.1 kg/m3...
Required information A shell-and-tube heat exchanger is used for cooling 47 kg/s of a process stream...
Required information A shell-and-tube heat exchanger is used for cooling 47 kg/s of a process stream flowing through the tubes from 160°C to 136°C. This heat exchanger has a total of 100 identical tubes. each with an inside diameter of 2.5 cm and negligible wall thickness. The average properties of the process stream are: p = 950 kg/m”, k = 0.50 W/mK, Cp=3.5 kJ/kg.K, and -20 mPas The coolant stream is water (cp=4.18 kJ/kg K) at a flow rate of...
A double-pipe, parallel-flow heat exchanger uses oil (cp = 1.88 kJ/kg °C) at an initial temperature...
A double-pipe, parallel-flow heat exchanger uses oil (cp = 1.88 kJ/kg °C) at an initial temperature of 175 °C to heat water, flowing at 360 kg/hr, from 20 °C to 65 °C. The oil flow rate is 390 kg/hr. (a) What heat exchanger area is required for an overall heat transfer coefficient of 300 W/m2 °C? (b) Determine the number of transfer units (NTU). (c) Calculate the effectiveness of the heat exchanger.
(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...
[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 concentric-pipe parallel-flow heat exchanger is to heat water (cp = 4.18 kJ/kg.K) from 20°C to...
A concentric-pipe parallel-flow heat exchanger is to heat water (cp = 4.18 kJ/kg.K) from 20°C to 80°C at a rate of 1.2 kg/s. The heating is to be accomplished by geothermal water (Cp =4.31 kJ/kg.K) available at 160°C at a mass flow rate of 2.0 kg/s. The inner pipe is thin-walled and has a diameter of 1.5 cm. If the overall heat transfer coefficient of the heat exchanger is 640 W/m2.K, determine the length of the pipe required to achieve...
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...
Problem X3-5, Heat Transfer, Spring 2018 A single-pass, double-tube counterflow heat exchanger will be used to...
Problem X3-5, Heat Transfer, Spring 2018 A single-pass, double-tube counterflow heat exchanger will be used to heat a 0.14 kg/s stream of water nowing in the 12-mm diameter inside tube. The water in the inside tube enters the heat exchanger at 25 C. The water will be heated with a 0.12 kg/s m of hot water flowing in the annulus between the inside and outside tube that enters the heat exchanger at 80°C. UP the hot and cold streams, and...
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...
Determine the effectiveness of the concentric tube heat exchanger. The working fluid through the heat exchanger is water and is flowing at 1 m/min for both cold and hot pipes. The hot water temperature at the tube inlet is 90°C and the temperature at the tube outlet is 60°C. The cold water temperature at the tube inlet is 50°C and the temperature at the tube outlet is 80°C. Assume the density and the specific heat of water are 988.1 kg/m3...
Required information A shell-and-tube heat exchanger is used for cooling 47 kg/s of a process stream flowing through the tubes from 160°C to 136°C. This heat exchanger has a total of 100 identical tubes. each with an inside diameter of 2.5 cm and negligible wall thickness. The average properties of the process stream are: p = 950 kg/m”, k = 0.50 W/mK, Cp=3.5 kJ/kg.K, and -20 mPas The coolant stream is water (cp=4.18 kJ/kg K) at a flow rate of...
(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...
[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 concentric-pipe parallel-flow heat exchanger is to heat water (cp = 4.18 kJ/kg.K) from 20°C to 80°C at a rate of 1.2 kg/s. The heating is to be accomplished by geothermal water (Cp =4.31 kJ/kg.K) available at 160°C at a mass flow rate of 2.0 kg/s. The inner pipe is thin-walled and has a diameter of 1.5 cm. If the overall heat transfer coefficient of the heat exchanger is 640 W/m2.K, determine the length of the pipe required to achieve...
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...
Problem X3-5, Heat Transfer, Spring 2018 A single-pass, double-tube counterflow heat exchanger will be used to heat a 0.14 kg/s stream of water nowing in the 12-mm diameter inside tube. The water in the inside tube enters the heat exchanger at 25 C. The water will be heated with a 0.12 kg/s m of hot water flowing in the annulus between the inside and outside tube that enters the heat exchanger at 80°C. UP the hot and cold streams, and...
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