Question

In: Mechanical Engineering

Hot exhaust gases, which enter a tube heat exchanger with cross-flow fins (both unmixed fluids) at...

Hot exhaust gases, which enter a tube heat exchanger with cross-flow fins (both
unmixed fluids) at 1.5 kg/s and 250 oC, are used to heat pressurized water at a speed
of 1.0 kg/s and 35 oC. The specific heat of the exhaust gas is 1.0 kJ/kg K, and the
overall heat transfer coefficient based on the surface area of the gas side is Uh = 100
22
W/m K and Ah = 40 m . Calculate heat transfer for heat exchanger and gas and
water outlet temperatures.

Solutions

Expert Solution

A thumbs up, pls !!


Related Solutions

LMTD of a cross-flow heat exchanger is
LMTD of a cross-flow heat exchanger is
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?
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.
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:...
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?
Air (Cp = 1.005 kJ/kg · K) is to be preheated by hot exhaust gases in...
Air (Cp = 1.005 kJ/kg · K) is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. Air enters the heat exchanger at 95 kPa and 20◦C at a rate of 0.90 kg/s. The combustion gases (Cp = 1.1 kJ/kg · K) enter at a rate of 1.1 kg/s and 150◦C. The product of the overall heat transfer coefficient and the heat transfer surface area is U A = 1200 W/K. Assuming...
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...
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT