A single pass heat exchanger is used to cool milk from 65 C to 20 C...
A single pass heat exchanger is used to cool milk from 65 C to 20 C using water initially at 10 C. The exit water is at 24 C.
(a). Is this a parallel- or counter flow unit?
(b). If U= 2500 W/(m2 K), what is the heat transferred per square meter of the heat exchanger area?
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A single pass heat exchanger is used to cool milk from 65 C to
20 C...
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...
(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 single shell pass, two tube pass heat exchanger is used to heat water entering at...
A single shell pass, two tube pass heat exchanger is used to heat water entering at Tc, in=15°C and mass flow rate 2 kg/s with ethylene glycol entering at Th, in= 85°C with a mass flow rate of 1kg/s. Calculate the rate of heat transfer Q and the outlet temperatures of the water and ethylene glycol if the heat transfer area is 10m2. (10 marks) Data: Specific Heat Capacity of ethylene glycol = 2600J/kg.°C Specific Heat Capacity of water =...
Determine the heat transfer surlace area required for a heat exchanger constructed from a 0.0254 m...
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4. A Cross-Flow Air-to-Water Heat Exchanger with an effectiveness of 0.58 is used to heat water, ...
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2. (35 points) A feedwater heater uses a shell-and-tube type heat exchanger with condensing steam in...
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Problem 4: Heat Exchangers Analysis (25 points) A counterflow plate-type heat exchanger as shown in the...
Problem 4: Heat Exchangers Analysis (25 points) A counterflow plate-type heat exchanger as shown in the figure below is used to cool propane fuel W 50 mm H 25 mm Saturated Vapor propane Thickness t =5 mm H 25 mm Cooling water Length L The flow rate of the cooling water is 0.2 kg/s, while the flow of the propane is 0.1 kg/s. The water enters the heat exchanger at a temperature of 20°C while the propane enters at its...
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...
(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...
Determine the heat transfer surlace area required for a heat exchanger constructed from a 0.0254 m OD tube to cool 6.93 kg/s of a 95% ethyl alcohol solution (Cp-3810 J/kg K) Irom 65.6 °C to 39.4 °C, using 6.30 kg/s of water (CP-4187 J/kg K) available at 10 "C Assuming that the overall coeflicient of heat transfer based on the outer tube area is 568 W/m K and Coc consider each of the following arrange a) Parallel-llow shel and tube...
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...
4. A Cross-Flow Air-to-Water Heat Exchanger with an effectiveness of 0.58 is used to heat water, entering at 20°C at a rate of 4 kg/s, using hot air, entering at 127oC at a rate of 10 kg/s. The Overall Heat Transfer Coefficient for the Heat exchanger is 275 W/m'K. Assuming both fluids are unmixed, determine; (i) The Heat Capacity rates for both the air and the water (ii) The heat transfer surface area. ii) The exit temperature of the water...
2. (35 points) A feedwater heater uses a shell-and-tube type heat exchanger with condensing steam in one shell pass at constant 130 °C. Water enters the tube at 25 °C and make four passes to produce an overall heat transfer coefficient, U value of 1,800 W/m2°C. Calculate the area of the heat exchanger for 2.4 kg/s mass flow of the water, with a water exit temperature of 95 °C. Here, the specific heat at Tm 60 °C is 4185 J/kg.°C.
Problem 4: Heat Exchangers Analysis (25 points) A counterflow plate-type heat exchanger as shown in the figure below is used to cool propane fuel W 50 mm H 25 mm Saturated Vapor propane Thickness t =5 mm H 25 mm Cooling water Length L The flow rate of the cooling water is 0.2 kg/s, while the flow of the propane is 0.1 kg/s. The water enters the heat exchanger at a temperature of 20°C while the propane enters at its...
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