Engine oil supplied through a 2-cm-diameter thin walled copper pipe (k = 385 W/kg·ºC) is to...
Engine oil supplied through a 2-cm-diameter thin walled copper pipe (k = 385 W/kg·ºC) is to be heated from 20ºC to 60ºC at a rate of 0.3 kg/s in a double-pipe heat exchanger by condensing steam at a temperature of 130ºC, which is supplied through an outer pipe with a diameter of 4 cm. If the heat exchanger is well insulated, determine the length of the heat exchanger required
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Engine oil supplied through a 2-cm-diameter thin walled copper
pipe (k = 385 W/kg·ºC) is to...
Engine oil supplied through a 2cm diameter thin walled copper pipe. k-385w/kg,c is to be heated...
Engine oil supplied through a 2cm diameter thin walled copper pipe. k-385w/kg,c is to be heated from 20C to 60C at a rate of 0.3kg/s in a double-pipe heat exchanger by condensing steam at a temperature of 130C, which is supplied through an outer pope with a diameter of 2 cm. if the heat exchager is well insulated determine the length of the heat exchanger
1. Engine oil (c-2100 J/kg- C) is to be heated from 20 °C to 60 °C...
1. Engine oil (c-2100 J/kg- C) is to be heated from 20 °C to 60 °C at a rate of 0.3 kg/s in a 2-cm diameter thin-walled copper tube by condensing steam outside at a temperature of 130 °C (hfs 2174 kJ/kg) a. For an overall heat transfer coefficient of 650 W/m2-°C, determine the rate of heat transfer and the length of tube required to achieve it. Determine also the rate of steam condensation, in kgsteam/sec. (Ans: 25.2 kW; 7.0...
Pressurized steam at 400 K flows through a long, thin-walled pipe of 0.6-m diameter. The pipe...
Pressurized steam at 400 K flows through a long, thin-walled pipe of 0.6-m diameter. The pipe is enclosed in a concrete (stone mix) casing that is of square cross section and 1.75 m on a side. The axis of the pipe is centered in the casing, and the outer surfaces of the casing are maintained at 300 K. What is the rate of heat loss per unit length of pipe, in W/m? q' = i W/m
A thin-walled double-pipe counter-flow heat exchanger is to be used to cool oil (cp-2200 /kg K)...
A thin-walled double-pipe counter-flow heat exchanger is to be used to cool oil (cp-2200 /kg K) from 150 C to 40°C at a rate of 2 kg/s by water (c 4180J/kg.K) that enters at 22°C at a rate of 1.5 kg/s. The diameter of the tube is 2.5 cm, O and its length is 6 m. Let the water inlet temperature vary from 5°C to 25°C. Identify the graph that depicts the overall heat transfer coefficient as a function of...
a 0.4 m diameter, thin walled steel pipe is used to transport saturated steam Problem 3.049...
a 0.4 m diameter, thin walled steel pipe is used to transport
saturated steam
Problem 3.049 A 0.4-m-diameter, thin-walled steel pipe is used to transport saturated steam at a pressure of 20 bars in a room for which the air temperature is 25°C and the convection heat transfer coefficient at the outer surface of the pipe is 20 W/m2-K. (a) What is the heat loss per unit length from the bare pipe (no insulation)? (b) Estimate the heat loss per...
Problem 1. (30 points) A double-pipe heat exchanger is used to condense steam at 7370 N/m2....
Problem 1. (30 points) A double-pipe heat exchanger is used to condense steam at 7370 N/m2. Water at an average bulk temperature of 10°C flows at 2.50 m/s through the inner pipe. which is made of copper and has a 2.54-cm ID and a 3.05-cm OD. Steam at its saturation temperature flows in the annulus formed between the outer surface of the inner pipe and an outer pipe of 5.08-cm-ID. The average heat transfer coefficient of the condensing steam is...
Two-pipe concentric concentric) for cooling the engine oil with the help of a water stream in...
Two-pipe concentric concentric) for cooling the engine oil with the help of a water stream in a large diesel engine a reverse (opposite) flow heat exchanger is used. Water at a flow rate of 0.3 kg/h from inside pipe with an inside diameter of 56 mm It flows. The inner pipe is made of stainless steel with a heat transmission coefficient of 16 W/mc and is meat (wall its thickness is 3 mm. Apart from this there is another pipe...
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 at 80°C flows through pipe is enclosed by a thin shell with a 120...
Hot water at 80°C flows through pipe is enclosed by a thin shell with a 120 mm diameter that is maintained at a temperature of 35°C. The space between the pipe and shell is completely filled with an insulative material (kins 0.05 W/m-K). Determine a.) the rate of heat loss per unit length (W/m) if the pipe and shell are concentric and b.) the rate of heat loss per unit length (W/m) if the pipe and shell centers are offset...
A concentric tube heat exchanger for cooling lubricating oil consists of a thin-walled inner tube of...
A concentric tube heat exchanger for cooling lubricating oil
consists of a thin-walled inner tube of 25 mm diameter carrying
water and an outer tube of 45 mm diameter carrying the oil. The
exchanger operates in countercurrent flow with an overall heat
transfer coefficient of 55 W/m2 K and the tabulated average
properties given below. Mass flow rates of oil and water are both
0.1 kg/s, oil enters the exchanger at 100°C, and water enters the
exchanger at 30°C. (a)...
1. Engine oil (c-2100 J/kg- C) is to be heated from 20 °C to 60 °C at a rate of 0.3 kg/s in a 2-cm diameter thin-walled copper tube by condensing steam outside at a temperature of 130 °C (hfs 2174 kJ/kg) a. For an overall heat transfer coefficient of 650 W/m2-°C, determine the rate of heat transfer and the length of tube required to achieve it. Determine also the rate of steam condensation, in kgsteam/sec. (Ans: 25.2 kW; 7.0...
Pressurized steam at 400 K flows through a long, thin-walled pipe of 0.6-m diameter. The pipe is enclosed in a concrete (stone mix) casing that is of square cross section and 1.75 m on a side. The axis of the pipe is centered in the casing, and the outer surfaces of the casing are maintained at 300 K. What is the rate of heat loss per unit length of pipe, in W/m? q' = i W/m
A thin-walled double-pipe counter-flow heat exchanger is to be used to cool oil (cp-2200 /kg K) from 150 C to 40°C at a rate of 2 kg/s by water (c 4180J/kg.K) that enters at 22°C at a rate of 1.5 kg/s. The diameter of the tube is 2.5 cm, O and its length is 6 m. Let the water inlet temperature vary from 5°C to 25°C. Identify the graph that depicts the overall heat transfer coefficient as a function of...
a 0.4 m diameter, thin walled steel pipe is used to transport
saturated steam
Problem 3.049 A 0.4-m-diameter, thin-walled steel pipe is used to transport saturated steam at a pressure of 20 bars in a room for which the air temperature is 25°C and the convection heat transfer coefficient at the outer surface of the pipe is 20 W/m2-K. (a) What is the heat loss per unit length from the bare pipe (no insulation)? (b) Estimate the heat loss per...
Problem 1. (30 points) A double-pipe heat exchanger is used to condense steam at 7370 N/m2. Water at an average bulk temperature of 10°C flows at 2.50 m/s through the inner pipe. which is made of copper and has a 2.54-cm ID and a 3.05-cm OD. Steam at its saturation temperature flows in the annulus formed between the outer surface of the inner pipe and an outer pipe of 5.08-cm-ID. The average heat transfer coefficient of the condensing steam is...
Two-pipe concentric concentric) for cooling the engine oil with the help of a water stream in a large diesel engine a reverse (opposite) flow heat exchanger is used. Water at a flow rate of 0.3 kg/h from inside pipe with an inside diameter of 56 mm It flows. The inner pipe is made of stainless steel with a heat transmission coefficient of 16 W/mc and is meat (wall its thickness is 3 mm. Apart from this there is another pipe...
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 at 80°C flows through pipe is enclosed by a thin shell with a 120 mm diameter that is maintained at a temperature of 35°C. The space between the pipe and shell is completely filled with an insulative material (kins 0.05 W/m-K). Determine a.) the rate of heat loss per unit length (W/m) if the pipe and shell are concentric and b.) the rate of heat loss per unit length (W/m) if the pipe and shell centers are offset...
A concentric tube heat exchanger for cooling lubricating oil
consists of a thin-walled inner tube of 25 mm diameter carrying
water and an outer tube of 45 mm diameter carrying the oil. The
exchanger operates in countercurrent flow with an overall heat
transfer coefficient of 55 W/m2 K and the tabulated average
properties given below. Mass flow rates of oil and water are both
0.1 kg/s, oil enters the exchanger at 100°C, and water enters the
exchanger at 30°C. (a)...
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