Mechanical Engineering - Heat Transfer, Refrigeration and Air Conditioning - Discussion
Discussion Forum : Heat Transfer, Refrigeration and Air Conditioning - Section 7 (Q.No. 4)
4.
In counter-current flow heat exchangers
Discussion:
24 comments Page 1 of 3.
Kedar said:
7 years ago
@Yasin consider the following.
1. Hot fluid enters from left.
2. Cold fluid enters from the right.
(since it is counter flow HE both fluids will enter in opposite direction i.e. left and right respectively.
3. Hot fluid will become cold and leaves from the outlet.
4. Cold fluid gets hotter and leaves from left.
Now consider 1 & 4, both fluids at the inlet are hot.
1. Hot fluid enters from left.
2. Cold fluid enters from the right.
(since it is counter flow HE both fluids will enter in opposite direction i.e. left and right respectively.
3. Hot fluid will become cold and leaves from the outlet.
4. Cold fluid gets hotter and leaves from left.
Now consider 1 & 4, both fluids at the inlet are hot.
Sanosh said:
1 decade ago
No, the answer is D. If both the fluids at inlet are in their hottest state, then what is the use of heat exchanger. In counterflow, 1 fluid enters in coldest state and leaves hotter while another fluid enters hottest and leaves colder after transferring heat to the counter fluid.
Nikky said:
8 years ago
No answer is right. The main concept of the given question was, inlet means at the inlet of the heat exchanger. Not separate inlets of hot and cold fluids. Hot fluid is flowing from left to right and cold fluid is flowing from right to left. Then the given answer should be right.
Ravi said:
7 years ago
Both the hot and cold fluid has separate inlet then why we just count the inlet of the hot fluid side?
Harshal Bajaj said:
3 years ago
Option D is for Parallel flow Heat exchanger.
Option A is correct for counter flow.
Option A is correct for counter flow.
(1)
Yasin said:
8 years ago
What do mean the inlet of heat exchanger? inlet of fluid is called inlet.
Kkh said:
6 years ago
@Kedar it's an outlet for the cold we can't consider inlet for both.
Gopal Dey said:
9 years ago
This answer is definitely wrong. The correct one is D.
Vinay said:
5 years ago
Both the fluids at inlet are in their hottest state.
NITHIN JOHN SIMON said:
9 years ago
D is the correct answer. How option A is possible?
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