- #1
Hammad
- 22
- 1
hello,
im in bachelors mechanical engineering programme and my thermodynamics papers are in few days
one question is related to heat exchangers or forced convection, but our professor has hinted that in the exam the question regarding heat exchanger, forced convection will be a case study of a power cycle where a heat exchanger will be attached to it, forced convection will be part of it. issue is we have been taught powercycles and heat exchangers/forced convection independently and we have not done any questions on powercycles and heat exchangers/forced convection together.
mainly we have done shell tube heat exchangers using both LMTD and NTU methods and not other heat exchangers like regenerator, power collectors, cooling towers etc.In forced convection, we have simply used reynold's analogy, mcadams equaion, prandtl, nusselt, reynolds number to calculate the rate of heat transfer.
our professor has told us that we won't have to calculate enthalpies, entropies but the question will be mainly about input and output for the heat exchanger (i think he is talking about Qin and Qout). he says that it will be case study about a power cycle where they will zoom into heat exchanger.
i have asked our professor to give us any example, so that we can have some idea regarding the data given, the questions asked and how the calculations for heat exchanger and power cycle can be relatable, but so far he has not given us anything.
so can you guys help me understand how to relate the powercycles and heat exchangers and any example to show what questions can be asked and what things to know to answer the questions.
an example question i found from internet is this one:
i also don't know if there will be one or more than one heat exchanger.
im in bachelors mechanical engineering programme and my thermodynamics papers are in few days
one question is related to heat exchangers or forced convection, but our professor has hinted that in the exam the question regarding heat exchanger, forced convection will be a case study of a power cycle where a heat exchanger will be attached to it, forced convection will be part of it. issue is we have been taught powercycles and heat exchangers/forced convection independently and we have not done any questions on powercycles and heat exchangers/forced convection together.
mainly we have done shell tube heat exchangers using both LMTD and NTU methods and not other heat exchangers like regenerator, power collectors, cooling towers etc.In forced convection, we have simply used reynold's analogy, mcadams equaion, prandtl, nusselt, reynolds number to calculate the rate of heat transfer.
our professor has told us that we won't have to calculate enthalpies, entropies but the question will be mainly about input and output for the heat exchanger (i think he is talking about Qin and Qout). he says that it will be case study about a power cycle where they will zoom into heat exchanger.
i have asked our professor to give us any example, so that we can have some idea regarding the data given, the questions asked and how the calculations for heat exchanger and power cycle can be relatable, but so far he has not given us anything.
so can you guys help me understand how to relate the powercycles and heat exchangers and any example to show what questions can be asked and what things to know to answer the questions.
an example question i found from internet is this one:
i also don't know if there will be one or more than one heat exchanger.
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