Mechanical Engineering - Steam Boilers and Engines - Discussion
Discussion Forum : Steam Boilers and Engines - Section 4 (Q.No. 17)
17.
All steam engines work on
Discussion:
21 comments Page 1 of 3.
AMAL said:
10 years ago
Second law:
1) No cycle has 100% efficiency.
2) Fluid cannot flow from low temp to high temperature by itself.
1) No cycle has 100% efficiency.
2) Fluid cannot flow from low temp to high temperature by itself.
Mohd amir khan said:
10 years ago
Why not in First law?
Anurup said:
9 years ago
First law is not applicable here because as per first law we know that whole of the energy used in a system is never wasted anywhere. But in the steam engine more of the energy supplied to it is wasted as a loss of friction due to various no of moving parts present in the steam engine.
Nayan said:
8 years ago
The Answer should be First Law which says Heat and Work are mutually convertible.
Siddu said:
8 years ago
Please tell me correct answer with the explanation.
Ashoka cm said:
8 years ago
Please explain the right answer?
ARUN KUMAR said:
8 years ago
Steam engine work on first law of thermodynamic because heat is converted in to work and total energy remains constant.
Manoj said:
8 years ago
@Nayan & @Arun said these are drawbacks of the first law.
So how any engine can made by using these drawbacks?
So how any engine can made by using these drawbacks?
Srilakshmi said:
8 years ago
STEAM engines work on 1st law only because heat and work are mutually convertible.
In a reciprocating steam engine, as the heat energy in the steam is converted into mechanical work by the reciprocating (to and fro) motion of the piston.
How, can 2 law possible?
In a reciprocating steam engine, as the heat energy in the steam is converted into mechanical work by the reciprocating (to and fro) motion of the piston.
How, can 2 law possible?
Md Asif said:
8 years ago
Option b ie 1st law is correct.
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