Homework Answers
> The 200 should be 120 at tg2
Tom Mannion Mon, Feb 14, 2022 8:09 AM
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(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...
please do 11.33 11.32 A single-pass, cross-flow heat exchanger uses hot exhaust gases (mixed) to heat...
please do 11.33
11.32 A single-pass, cross-flow heat exchanger uses hot exhaust gases (mixed) to heat water (unmixed) from 30 to 80°C at a rate of 3 kg/s. The exhaust gases, hav- ing thermophysical properties similar to air, enter and exit the exchanger at 225 and 100°C, respectively. If the overall heat transfer coefficient is 200 W/m2.K, estimate the required surface area. 11.33 Consider the fluid conditions and overall heat transfer coefficient of Problem 11.32 for a concentric tube heat...
An oil engine develops 300 kW and the specific fuel consumption is 0.21 kg/kWh. The exhaust...
An oil engine develops 300 kW and the specific fuel consumption is 0.21 kg/kWh. The exhaust from the engine is used in a tubular water heater, flowing through 25 mm diameter tubes, entering with a velocity of 12 m/s, at 340 °C and leaving at 90 °C. The water enters the heater at 10 °C and leaves at 90 °C, flowing in counter-flow to the hot gases. The air-fuel ratio of the engine is 20, and the exhaust pressure is...
Question 1- Exhaust gases from a power plant are used to preheat air in a cross-flow...
Question 1- Exhaust gases from a power plant are used to preheat air in a cross-flow heat exchanger. The exhaust gases enter the heat exchanger at 450°C and leave at 200°C. The air enters the heat exchanger at 70°C, leaves at 250°C, and has a mass flow rate of 10 kg/s. Assume the properties of the exhaust gases can be approximated by those of air. The overall heat transfer coefficient of the heat exchanger is 154 W/m2 K. Calculate the...
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...
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...
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...
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 small workboat is fitted with a diesel engine that develops its maximum power of 300...
A small workboat is fitted with a diesel engine that develops its maximum power of 300 kW with a corresponding specific fuel consumption of 0.21 kg/kW h. At maximum power, the air-fuel ratio of the engine is 20 and the exhaust pressure is 1.01 bar. It is proposed to provide hot water for the vessel by using a shell and tube heat exchanger to extract waste heat from the engine exhaust gases. Calculate the: (i) tube length required. The following...
I. A finned-tube, cross-flow heat exchanger (F 0.96) is to use the exhaust of a gas...
I. A finned-tube, cross-flow heat exchanger (F 0.96) is to use the exhaust of a gas turbine to heat pressurized water. Laboratory measurement are performed on a prototype version of the exchanger, which has a surface area of 8 m2, to determine the overall heat transfer coefficient as a function of operating conditions. Measurements made under particular conditions, for which in-5 kgs. Thi-350 ℃, m.-0.5 kg/s, and Tu-25℃, reveal a water outlet temperature of Tso-150℃. What is the overall heat...
العداله که درجات A processfuld having a specific heat of 3500 kg and flowing at 2...
العداله که درجات A processfuld having a specific heat of 3500 kg and flowing at 2 kgs is to be cooled from 80°C to 50°C with chiled water, which is supplied at a temperature of 18 and a flow rate of 25 kes. Assuming an overall heat transfer coefficient of 2000 W/m2 K by using the NTU method calculate the required heat transfer areas for persel flow exchanger configurations 387 العلوم الانتقال اسی اصول آمار با هدا الورد
please do 11.33
11.32 A single-pass, cross-flow heat exchanger uses hot exhaust gases (mixed) to heat water (unmixed) from 30 to 80°C at a rate of 3 kg/s. The exhaust gases, hav- ing thermophysical properties similar to air, enter and exit the exchanger at 225 and 100°C, respectively. If the overall heat transfer coefficient is 200 W/m2.K, estimate the required surface area. 11.33 Consider the fluid conditions and overall heat transfer coefficient of Problem 11.32 for a concentric tube heat...
An oil engine develops 300 kW and the specific fuel consumption is 0.21 kg/kWh. The exhaust from the engine is used in a tubular water heater, flowing through 25 mm diameter tubes, entering with a velocity of 12 m/s, at 340 °C and leaving at 90 °C. The water enters the heater at 10 °C and leaves at 90 °C, flowing in counter-flow to the hot gases. The air-fuel ratio of the engine is 20, and the exhaust pressure is...
Question 1- Exhaust gases from a power plant are used to preheat air in a cross-flow heat exchanger. The exhaust gases enter the heat exchanger at 450°C and leave at 200°C. The air enters the heat exchanger at 70°C, leaves at 250°C, and has a mass flow rate of 10 kg/s. Assume the properties of the exhaust gases can be approximated by those of air. The overall heat transfer coefficient of the heat exchanger is 154 W/m2 K. Calculate the...
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...
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...
I. A finned-tube, cross-flow heat exchanger (F 0.96) is to use the exhaust of a gas turbine to heat pressurized water. Laboratory measurement are performed on a prototype version of the exchanger, which has a surface area of 8 m2, to determine the overall heat transfer coefficient as a function of operating conditions. Measurements made under particular conditions, for which in-5 kgs. Thi-350 ℃, m.-0.5 kg/s, and Tu-25℃, reveal a water outlet temperature of Tso-150℃. What is the overall heat...
العداله که درجات A processfuld having a specific heat of 3500 kg and flowing at 2 kgs is to be cooled from 80°C to 50°C with chiled water, which is supplied at a temperature of 18 and a flow rate of 25 kes. Assuming an overall heat transfer coefficient of 2000 W/m2 K by using the NTU method calculate the required heat transfer areas for persel flow exchanger configurations 387 العلوم الانتقال اسی اصول آمار با هدا الورد
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> how that tg2 become 200
sam25 Fri, Apr 23, 2021 5:46 AM