We have a heat exchanger tube whose speed is doubled. How will the α-value and the...

We have a heat exchanger tube whose speed is doubled. How will the α-value and the pressure drop be affected by this, ie how much will their value increase as a percentage? What circumstances (factors) decides the choice of optimum speed?

Expert Solution

Amanda K answered 1 year ago

A shell-and-tube heat exchanger is to used to heat water (in the tube side) from 30...

A shell-and-tube heat exchanger is to used to heat water (in the tube side) from 30 deg C to 40 deg C at a mass flow rate of 4 kg/s. The fluid used for heating (shell side) is water entering at 90 deg C with a mass flow rate of 2 kg/s. A 1-2 STHE is used and the overall heat transfer coefficient based on the inside area is 1390 W/m2-K. The tubes are 1.875 in diameter (inside) and require...

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 production engineer bought a heat exchanger whose value is $ 18500 with a useful life...

A production engineer bought a heat exchanger whose value is $ 18500 with a useful life period of 10 years, this equipment is expected to produce income from year 1 for $ 3000, increasing by $ 800 per year. It is also known that annual operating costs are $ 350 from year 3. In year 5, maintenance must be done for $ 1500. If the rate of return is 12%, determine the present value of the investment.

HEAT TRANSFER QUESTION A shell-and-tube heat exchanger with one shell pass and four tube passes, that...

HEAT TRANSFER QUESTION A shell-and-tube heat exchanger with one shell pass and four tube passes, that contains 190 pipes (thin walled, 4m long, 2.6 cm diameter), will be used to heat the air. Water enters the pipes at 350 K with 8kg/s mass flow rate while the air enters the shell at 15 C with 18kg/s mass flow rate. In time there will be a fouling factor of 0.0026m2K/W on the inside of pipes. Inside heat transfer coefficient is 450...

Heat transfer question A shell-and-tube heat exchanger is used to heat a liquid that flows in...

Heat transfer question A shell-and-tube heat exchanger is used to heat a liquid that flows in tubes of inside and outside diameters Di=10 mm and Do=11 mm. You have been asked to choose the most cost-efficient material for the tubes. Material A has a density ρA=8900 kg/m3 and a thermal conductivity kA= 10 W/m·K. Material B has a density ρB=1780 kg/m3 and a thermal conductivity kB=0.17 W/m·K. The cost of material A per unit mass is three times the cost...

Heat transfer In a test in a double tube heat exchanger the following data are obtained...

Heat transfer In a test in a double tube heat exchanger the following data are obtained For hot fluid Flow = 11.6 gal / sec Outlet temperature = 30.1 ° C Inlet temperature = 32 ° C For cold fluid Flow 11gal / min Outlet temperature 25.1 ° C Inlet temperature 24.2 ° C For the fluid consider k = 0.49 w / mK cp = 3729.95 J / kgK Prandtl number = 14.29 Density = 1035.02kg / m3 Get:...

Heat transfer in a test in a double tube heat exchanger the following data are obtained...

Heat transfer in a test in a double tube heat exchanger the following data are obtained For hot fluid Flow = 11.6 gal / sec Outlet temperature = 30.1 ° C Inlet temperature = 32 ° C For cold fluid Flow 11gal / min Outlet temperature 25.1 ° C Inlet temperature 24.2 ° C For the fluid consider k = 0.49 w / mK cp = 3729.95 J / kgK Prandtl number = 14.29 Density = 1035.02kg / m3 Get:...

The condenser of a thermoelectric plant is a shell and tube heat exchanger consisting of a...

The condenser of a thermoelectric plant is a shell and tube heat exchanger consisting of a shell and 30,000 tubes, each of which executes two steps. The tubes are thin- walled with D = 25 mm, and the steam condenses on its outer surface with a convection coefficient of ho = 11 kW/m2 K. The heat transfer that the exchanger must perform is 2,000 MW, and this is carried out by passing cooling water through the pipes at the rate...

liquid oil is used in the tube side of a shell-and-tube heat exchanger with two shell...

liquid oil is used in the tube side of a shell-and-tube heat exchanger with two shell passes and four tube passes. water is heated in the shell side from 10°C to 50°C while the oil is cooled from 90°C to 60°C. the overall heat transfer coefficient is 53 W/m^2*K. the specific heat of the oil is 2.0 kJ/kg*K. Using the NTU - effectiveness method, calculate the area of the heat exchanger for a total energy transfer of 500 kW. what...

A shell and tube type of heat exchanger with one shell pass and two tube passes...

A shell and tube type of heat exchanger with one shell pass and two tube passes will be designed to provide the given heat transfer rate Q(kW) to cool hot water by using cold river water . The hot water flows through the shell and the cold water flows through the tubes. The inlet and outlet temperatures of the hot water and the cold water are given as Thi, The and Tci, Tce in degrees Celcius. Design the shell and...

Question