Closed
System Daemons: Closed Process or Closed Steady
Problems
HOME.
Daemons.
Systems.
Closed
Does
the closed system remain steady or evolve from a begin-state to a finish-state?
Closed
Steady
The snapshot of the system taken with a State-Camera does not change
with time (read the Tutorial>Algorithm
page) when a system is at steady state.
The total mass, energy and entropy of the system do not change with
time as a result. Other than trivial closed systems, heat engine cycle,
refrigeration cycle and heat pump cycle are examples of closed steadey-state
problems. If , however, a problem involves individual strokes of a closed
cycle, one should visit
TEST.System.Daemons. Closed.Process.Specific.Cycles
page.
Closed
Unsteady
Instantaneous
Is the snapshot changing with time? The system is unsteady
in that case. Most of the unsteady problems, however, involves integral
quantities rather than the instantaneous rate of changes. TEST, at present,
does not offer any daemon to calculate instantaneous rates of change.
Closed
Process
Is there an initial or begin-state and a finial or finish-state in
the unsteady problem? That is the hallmark of a process.
Most of the closed, unsteady problems found in textbooks and encountered
in industries are of this type. If the system undergoes a one-time change
from a b-State to a f-State,
the anchors of a process. The process variables are heat transfer, work
transfer and entropy generation.
