How would you reduce fouling in a compact heat exchanger?
What will be an ideal response?
Fouling in compact heat exchangers can be reduced as with all heat exchangers:
keeping them clean with periodic checks, good, controlled filtration of fluids,
and possible use of chemicals to control contaminations that could cause
fouling.
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Water (density = 1 × 10^3 kg/m3) flows at 10 m/s through a pipe with radius 0.040 m. The pipe goes up to the second floor of the building, 2.0 m higher, and the pressure remains unchanged. What is the radius of the pipe on the second floor?
a. 0.045 m c. 0.015 m b. 0.034 m d. 0.012 m
Secondary waves can travel through all areas of Earth except the
A) surface. B) outer core. C) inner core. D) mantle.
A 1.15-kg grinding wheel 22.0 cm in diameter is spinning counterclockwise at a rate of 20.0 revolutions per second. When the power to the grinder is turned off,
the grinding wheel slows with constant angular acceleration and takes 80.0 s to come to a rest. (a) What was the angular acceleration (in rad/s2 ) of the grinding wheel as it came to rest if we take a counterclockwise rotation as positive? (b) How many revolutions did the wheel make during the time it was coming to rest?
What is parallax?
A. the apparent shift in position of an object caused by a change in the observer's position B. the shift in angular position of an object as the object actually moves in space C. the distance to an object, measured in parsecs D. the difference between the apparent and absolute magnitude