define heat exchanger mechanical flow switch

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samet mamat answered 1 year ago

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LMTD of a cross-flow heat exchanger is

A counter-flow double-pipe heat exchanger is to heat water from 20ºC to 80ºC at a rate...

A counter-flow double-pipe heat exchanger is to heat water from 20ºC to 80ºC at a rate of 1.2 kg/s. The heating is to be accomplished by geothermal water available at 160ºC at a mass flow rate of 2 kg/s. The inner tube 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.ºC), determine the length of the heat exchanger required to achieve the desired heating using the effectiveness-NTU...

Which one of the following statements are correct? In a counter-flow heat exchanger, the exit temperature...

Which one of the following statements are correct? In a counter-flow heat exchanger, the exit temperature of the cold fluid can never reach the exit temperature of the hot fluid. In a parallel flow heat exchanger the exit temperature of the cold fluid is always greater than the exit temperature of the hot fluid. In a counter flow heat exchanger the exit temperature of the cold fluid is always greater than the exit temperature of the hot fluid. In a...

A double-pipe heat exchanger is designed as an engine oil cooler. The flow rate of oil...

A double-pipe heat exchanger is designed as an engine oil cooler. The flow rate of oil is 5 kg/s, and it will be cooled from 60°C to 40°C through annulus (ID = 0.10226 m, OD = 0.1143 m). Sea water flows through the tubes (ID = 0.02664 m, OD = 0.03340 m) and is heated from 10°C to 30°C. The number of bare tubes in the annulus is 3, and the length of the hairpin is 3 m. Assume that...

Subject: Heat exchanger Lab Question: 1.1) in heat exchanger analysis, the following quantities are used. Explain...

Subject: Heat exchanger Lab Question: 1.1) in heat exchanger analysis, the following quantities are used. Explain what each means and give a formula for each. Assume the mass flow rates, fluid properties, inlet, temperatures, and length and diameters of the heat exchanger are known. a) Overall heat transfer coefficient. UA. b) A number of transfer units, NTU. c) Effectiveness, e 1.2) what is the hydraulic diameter and why is it useful for double-pipe heat exchanger analysis?

What is called Supertargetting in Heat Exchanger Network Design? How Heat Exchanger Network Design can be...

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In a thermofluids lab, a student is analysing a prototype single-pass cross-flow heat exchanger used to...

In a thermofluids lab, a student is analysing a prototype single-pass cross-flow heat exchanger used to cool water from 90oC to 60oC by transferring its heat to an air stream with an inlet temperature of 30oC without mixing. The water and air flow rates are 42,000 kg/h and 180,000 kg/h respectively. Assume that for the water cp=4.18kJ/kg⋅oC and for the air cp=1.02kJ/kg⋅oC. Calculate the log mean temperature difference for this heat exchanger.

A counter-flow double-pipe heat exchanger is heating water from 20 to 80 C at a rate...

A counter-flow double-pipe heat exchanger is heating water from 20 to 80 C at a rate of 1.2 kg/s. The heating is provided by water at 160 C and a rate of 2 kg/s. The inner tube has a diameter of 1.5 cm, and the U is 640 W/m2 K. Use the effectiveness-NTU method to determine the length of the heat exchanger required.

A shell and tube heat exchanger is to be desined by kern's method to heat Toluene....

A shell and tube heat exchanger is to be desined by kern's method to heat Toluene. Toulene: T(in)=100F, T(out)=257F, flowrate=125000Ib/hr P(in)=90Psia composition:100% Toluene. Styrene: T(in)=300F, T(out)=176F, P(in)=50psia composition:100% Styrene What is the mass flow rate of Styrene? Which fluid should be in the shell side and which should be in the tube side and why?

A heat exchanger purchased by Hot Spot Manufacturing cost $24,000. The exchanger will save $4,500 in...

A heat exchanger purchased by Hot Spot Manufacturing cost $24,000. The exchanger will save $4,500 in each of the next 10 years. Hot Spot will use SOYD depreciation over a six-year depreciable life. The declared salvage value is $3,000. It is expected the exchanger will be sold for the declared value. Hot Spot pays taxes at a combined rate of 42% and has a MARR of 8%. Was the purchased justified?

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