Bundle: Refrigeration and Air Conditioning Technology, 8th + MindTap HVAC, 2 terms (12 months) Printed Access Card
8th Edition
ISBN: 9781337190336
Author: TOMCZYK
Publisher: CENGAGE L
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Chapter 6, Problem 15RQ
To determine
Two kinds of tapping screws.
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14.10. A liquor containing 15 per cent
solids is concentrated to 55 per cent
solids in a double-effect evaporator.
operating at a pressure in the second
effect of 18 kN/m². No crystals are
formed. The flowrate of feed is 2.5 kg/
s at 375 K with a specific heat capacity
of 3.75 kJ/kg K. The boiling-point rise of
the concentrated liquor is 6 deg K and the
steam fed to the first effect is at 240 kN/
m². The overall heat transfer coefficients
in the first and second effects are 1.8 and
0.63 kW/m²K. respectively. If the heat
transfer area is to be the same in each
effect, what areas should be specified?
D
A
14.9. A forward feed double-effect vertical
evaporator, with equal heating areas in
each effect, is fed with 5 kg/s of a liquor
of specific heat capacity of 4.18 kJ/kg K.
and with no boiling point rise, so that 50
per cent of the feed liquor is evaporated.
The overall heat transfer coefficient in the
second effect is 75 per cent of that in the
first effect. Steam is fed at 395 K and the
boiling point in the second effect is 373 K.
The feed is heated by an external heater to
the boiling point in the first effect.
It is decided to bleed off 0.25 kg/s of
vapour from the vapour line to the second
effect for use in another process. If the
feed is still heated to the boiling point of
the first effect by external means, what
will be the change in steam consumption
of the evaporator unit? For the purpose of
calculation, the latent heat of the vapours
and of the steam may both be taken as
2230 kJ/kg
Ад
O
correct the shaft misalignment in a cars transmission system, determine the offset distance required to correct the shaft misalignment of 4 degrees in a rotating system. shaft diameter is 4cm.
Chapter 6 Solutions
Bundle: Refrigeration and Air Conditioning Technology, 8th + MindTap HVAC, 2 terms (12 months) Printed Access Card
Ch. 6 - Three types of nails are _______, ________, and...Ch. 6 - The term _________is used to indicate the size of...Ch. 6 - What is the abbreviation for the answer to...Ch. 6 - An outward clinch tacker is used to A. bend wire...Ch. 6 - Wood screws generally have A. a flat head. B. a...Ch. 6 - List and describe three methods of securing an...Ch. 6 - Prob. 7RQCh. 6 - Prob. 8RQCh. 6 - Prob. 9RQCh. 6 - Write a typical dimension for a tapping screw....
Ch. 6 - Prob. 11RQCh. 6 - Prob. 12RQCh. 6 - Describe the procedure for fastening two pieces of...Ch. 6 - Hollow rivets are assembled in a pin that is often...Ch. 6 - Prob. 15RQCh. 6 - Prob. 16RQCh. 6 - Prob. 17RQCh. 6 - Prob. 18RQCh. 6 - Explain the purpose of external and internal...Ch. 6 - Prob. 20RQ
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