Enter 1000 lb / h of oil at 100 ° F in a 1-inch copper tube, the length of the tube is 12 ft. If the tube surface is maintained at 220 ° F, determine the oil outlet temperature.
Homework Answers
1.17 A thin, 0.5 inch diameter copper (k = 220 Btu / hr-ft-F) rod spans the...
1.17 A thin, 0.5 inch diameter copper (k = 220 Btu / hr-ft-F) rod spans the distance between two parallel plates 6 inches apart. Air flows in the space between the plates, providing a heat transfer coefficient of 40 Btu / hr-ft2-F at the surface of the rod. The surface temperature of the plates exceeds that of the air by 100 F. By how much does the temperature at the midpoint of the rod exceed the temperature of the air...
Cooling water available at 680F is flowing through 1 in diameter tube at a rate of...
Cooling water available at 680F is flowing through 1 in diameter tube at a rate of 62000 lb/hr to cool 7000 lb/hr of a lube oil from 200 to 1000F. The specific heat of the lube is 0.62 Btu/lbm oF and viscosity is 5 cp, thermal conductivity is 0.067 Btu/ft-hr °F. The overall heat transfer coefficient is 35 Btu/ft? hr of. It is considered for a single pass exchanger with 44 tubes are requires. a. Draw a schematic diagram of...
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)...
Engine oil is heated by flowing through a circular tube of diameter D = 50 mm...
Engine oil is heated by flowing through a circular tube of diameter D = 50 mm and length L = 25 m and whose surface is maintained at 150 oC. The flow rate and inlet temperature of the oil are 0.5 kg/s and 20 oC. a. Estimate the outlet temperature Tm,o. B. Average Nusselt number C. Estimate the total heat transfer rate q for the tube.
1. A ¾ inch (nominal), Schedule 40, mild steel pipe carries 40 psia steam through a...
1. A ¾ inch (nominal), Schedule 40, mild steel pipe carries 40 psia steam through a room having an air temperature of 80°F. The pipe is covered with a 0.125 ft thick layer of fiberglass insulation having a thermal conductivity of 0.037 Btu/(h ft ‘F). The hi value on the steam side of the pipe is 1000 Btu/h ft2 °F. The ho value on the outside of the insulation is 2.0 Btu/(h ft2 ’F). For the mild steel, k=26Btu/(ft H...
A water heater consists of a copper tube that carries water through hot gas in a...
A water heater consists of a copper tube that carries water through hot gas in a furnace, as shown in Fig. 1. hot gas at T, = 500° th=0.033 inch h, = 25 W/m2K Poytube = 0.25 inch water at Tv = 30° h = 500 W/m2K kube= 300 W/m-K Figure 1: Copper tube in a water heater. The copper tube has an outer radius, ro,tube = 0.25 inch and a tube wall thickness of th=0.033 inch. The conductivity of...
please show all steps and do both. if you dont do both problems please do problem...
please show all steps and do both. if you dont do both
problems please do problem 2 is more important .
Problem 2. (45 Points) Cooling water available at 680F is flowing through 1 in diameter tube at a rate of 62000 lb/hr to cool 7000 lb/hr of a lube oil from 200 to 1000F. The specific heat of the lube is 0.62 Btu/lbm oF and viscosity is 5 cp, thermal conductivity is 0.067 Btu/ft-hr °F. The overall heat transfer...
(3.14) An organic liquid at 185 F is to be cooled with water that is available...
(3.14) An organic liquid at 185 F is to be cooled with water that is available at 80°E. A double-pipe beat exchanger consisting of six hairpins connected in series will be used. The heat exchanger pipes are schedule 40. Bach hairpin is 20 ft long and is made with 2- and 1-in. stainless steel (k 9.4 Btu/h ft F) pipes. Flow rates and fuid properties, which may be assumed constant, are given below. The organic liquid will flow through the...
Liquid water flows in an ASTM B75 copper tube at a mass flow rate of 3.6...
Liquid water flows in an ASTM B75 copper tube at a mass flow rate of 3.6 g/s. The water enters the tube at 40°C, and the tube surface is subjected to a constant heat flux at a rate of 1.8 kW. The tube is circular with an inner diameter of 25 mm and a length of 3 m. The maximum use temperature for ASTM B75 copper tube is 204°C. Would the surface temperature of the tube exceed the maximum use...
Oil of unknown properties is heated in a shell-and-tube heat exchanger with one shell pass and...
Oil of unknown properties is heated in a shell-and-tube heat exchanger with one shell pass and 20 tube passes. The oil flows through the shell, and hot water flows inside the single copper tube that has an inner diameter of 20 mm, a wall thickness of 2 mm, and a length of 3 m per pass. The water enters at 360 K at a mass flow rate of 0.2 kg/s and leaves at 300 K. The inlet and outlet temperatures...
Cooling water available at 680F is flowing through 1 in diameter tube at a rate of 62000 lb/hr to cool 7000 lb/hr of a lube oil from 200 to 1000F. The specific heat of the lube is 0.62 Btu/lbm oF and viscosity is 5 cp, thermal conductivity is 0.067 Btu/ft-hr °F. The overall heat transfer coefficient is 35 Btu/ft? hr of. It is considered for a single pass exchanger with 44 tubes are requires. a. Draw a schematic diagram 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)...
A water heater consists of a copper tube that carries water through hot gas in a furnace, as shown in Fig. 1. hot gas at T, = 500° th=0.033 inch h, = 25 W/m2K Poytube = 0.25 inch water at Tv = 30° h = 500 W/m2K kube= 300 W/m-K Figure 1: Copper tube in a water heater. The copper tube has an outer radius, ro,tube = 0.25 inch and a tube wall thickness of th=0.033 inch. The conductivity of...
please show all steps and do both. if you dont do both
problems please do problem 2 is more important .
Problem 2. (45 Points) Cooling water available at 680F is flowing through 1 in diameter tube at a rate of 62000 lb/hr to cool 7000 lb/hr of a lube oil from 200 to 1000F. The specific heat of the lube is 0.62 Btu/lbm oF and viscosity is 5 cp, thermal conductivity is 0.067 Btu/ft-hr °F. The overall heat transfer...
(3.14) An organic liquid at 185 F is to be cooled with water that is available at 80°E. A double-pipe beat exchanger consisting of six hairpins connected in series will be used. The heat exchanger pipes are schedule 40. Bach hairpin is 20 ft long and is made with 2- and 1-in. stainless steel (k 9.4 Btu/h ft F) pipes. Flow rates and fuid properties, which may be assumed constant, are given below. The organic liquid will flow through the...
Liquid water flows in an ASTM B75 copper tube at a mass flow rate of 3.6 g/s. The water enters the tube at 40°C, and the tube surface is subjected to a constant heat flux at a rate of 1.8 kW. The tube is circular with an inner diameter of 25 mm and a length of 3 m. The maximum use temperature for ASTM B75 copper tube is 204°C. Would the surface temperature of the tube exceed the maximum use...
Oil of unknown properties is heated in a shell-and-tube heat exchanger with one shell pass and 20 tube passes. The oil flows through the shell, and hot water flows inside the single copper tube that has an inner diameter of 20 mm, a wall thickness of 2 mm, and a length of 3 m per pass. The water enters at 360 K at a mass flow rate of 0.2 kg/s and leaves at 300 K. The inlet and outlet temperatures...
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