thermodynamic process
Let an agent handle thermodynamic processes by type, variables, energy transfer and applications.
Research draft, second pass
A second pass drafted this model: the structure a model of this thing needs, and what is known about it in the world. The line under this one says how the second half was obtained - researched against sources, or recalled without web access, in which case nothing here was read anywhere and every claim is a lead to verify. Unreviewed either way.
written by Claude from model knowledge without web access - no source was read, every claim is a lead to verify
Researched by: Claude
Purpose and description
Let an agent handle thermodynamic processes by type, variables, energy transfer and applications.
A change in the state of a thermodynamic system, described by paths such as isothermal, adiabatic, isobaric and isochoric processes, involving transfers of energy as heat and work.
What it is for: Analysing engines, refrigeration, chemistry and energy systems.
It can be classify a process; compute work and heat; plot processes on diagrams; analyse cycles.
Distinguishing features
Change of thermodynamic state
Defined by what is held constant
Reversible or irreversible
Obeys the laws of thermodynamics
What it looks like
Represented by paths on pressure-volume or temperature-entropy diagrams.
How it is recognised
Process names such as adiabatic
P-V and T-S diagrams
Energy transfer processes
Related models
is a kind of - category
is governed by - laws
involves - energy transfers
is used in - applications
In practice
Families and kinds
isothermal processes
adiabatic processes
isobaric processes
isochoric processes
cyclic processes
Standards and regulation
ISO 80000-5 thermodynamic quantities
Failure modes and hazards
Sign convention errors
Assuming reversibility
Pressure hazards in real systems
Also called
Where this came from
wikidata · CC0 1.0
Drafted structure
Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.
Type Which process.
Constraints define type.
Constraint
What is constant.
Constraint
Process type.
- Which variable is held constant? definition
- Is the process reversible? boundary
System
Open or closed.
System
System.
- Is the system open, closed or isolated? definition
- What is the working substance? definition
Energy Heat and work.
First law applies.
Work
Computation.
Work
Work.
- How much work is done, and by or on the system? measurement
- Which sign convention is used? definition
Heat
Transfer.
Heat
Heat.
- How much heat is transferred? measurement
- How does internal energy change? measurement
Entropy Second law.
Entropy limits processes.
Change
Entropy change.
Change
Entropy change.
- What is the entropy change? measurement
- Is the process possible under the second law? boundary
Efficiency
Limits.
Efficiency
Efficiency.
- What efficiency limit applies? measurement
- How close is the real system? measurement
Applications Uses.
Processes build cycles.
Cycles
Engines and refrigeration.
Cycles
Cycles.
- Which cycle uses this process? definition
- How is it plotted? action
Safety
Pressure systems.
Safety
Pressure safety.
- Are pressure and temperature limits respected in the real system? boundary
- Which standard applies? provenance
What the second pass must settle
- Should process types be separate entries?
- How should sign conventions be recorded?
- How should cycles be linked?