Question
In: Mechanical Engineering
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.
Solutions
samet mamat answered 8 months agoRelated Solutions
LMTD of a cross-flow heat exchanger is
LMTD of a cross-flow heat exchanger is
A shell-and-tube heat exchanger with two tube passes and baffled single shell pass is used as...
A shell-and-tube heat exchanger with two tube passes and baffled
single shell pass is used as oil cooler. Cooling water at 20°C
flows through the tubes at a flow rate of 4.082 kg/s.
Engine oil enters the shell side at a flow rate of 10
kg/s. The inlet and outlet temperatures of oil are 90°C
and 60°C, respectively. The overall heat transfer coefficient based
on the outside tube area (Uo) is 262
W/m2⋅K. The specific heats of water and oil...
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?
define heat exchanger mechanical flow switch
define heat exchanger mechanical flow switch
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...
We are designing a double pass heat exchanger to heat ethanol from 25 C to 75...
We are designing a double pass heat exchanger to heat ethanol
from 25 C to 75 C using steam. The flowrate of ethanol is 175 gpm =
0.011 m3 /s. We will start by using tubes with OD = 0.625”, ID =
0.50”. The ethanol is heated by low pressure saturated steam with
Tin,s = 150 C, and Tout,s = 140 F. We eventually (Problem 8) want
to calculate the heat needed to raise the temperature of the
ethanol, and...
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...
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...
A heat exchanger is used to transfer heat from a steam stream to a chlorine gas...
A heat exchanger is used to transfer heat from a steam stream to
a chlorine gas stream. 100 kg of steam at 1 bar and 250°C enters
the heat exchanger and leaves the exchanger as saturated steam at 1
bar. Chlorine gas enters the exchanger at 1 bar and 33.0°C and
leaves the exchanger at 132.0°C. Assume the heat exchanger is
adiabatic.
A)What is the specific enthalpy of the inlet steam stream? (Use
liquid water at 0.01°C as a reference...
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...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- What kind of batteries are least expensive? Are there new developments in batteries that will bring...
- Provide 3 types of construction permits may be required in a construction project and elaborate on...
- Provide five (5) reasons why product prices are sticky in the short run.
- Suppose that you deposit $391 in a savings account at Prosperity Bank at the end of...
- A cylindrical steel tank is coated with a thick layer of zinc on the inside. The...
- Exemplars are people who serve as excellent examples of the virtuous life. Make a list of...
- Speedy Pty Ltd operates a suburban delivery business. It is considering the replacement of a 2-ton...
ADVERTISEMENT