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Research draft

thermodynamic cycle

vr.tr.thermodynamic-cycle · ACT.PRC

Let an agent handle thermodynamic cycles by type, processes, efficiency and applications in engines, power plants and heat pumps.

Thing Registry Activities and processes

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 cycles by type, processes, efficiency and applications in engines, power plants and heat pumps.

A sequence of thermodynamic processes that returns a working fluid to its initial state, converting heat to work or moving heat, such as the Carnot, Otto, Diesel, Rankine, Brayton and refrigeration cycles.

What it is for: Understanding engines, power generation and refrigeration.

It can be identify cycle types and processes; calculate ideal efficiencies; compare real and ideal performance; relate cycles to machines.

Distinguishing features

Returns to initial state

Net work or heat transfer

Efficiency limited by Carnot

Basis of engines and heat pumps

What it looks like

Represented on pressure-volume and temperature-entropy diagrams.

How it is recognised

Closed loops on PV or TS diagrams

Named cycles such as Otto or Rankine

Business or life cycles are different senses

Related models

is a kind of - category

thermodynamic process

is used in - applications

engine and power station

is limited by - principle

second law of thermodynamics

is related to - goal

efficient energy use

In practice

Families and kinds

Carnot cycle

Otto and Diesel cycles

Rankine cycle

Brayton and combined cycles

refrigeration and heat pump cycles

Standards and regulation

ISO performance test codes for turbines

Engineering thermodynamics conventions

Failure modes and hazards

Assuming ideal efficiency in real machines

Unit errors in calculations

Also called

integrated gasification combined cyclereversed Carnot cycleDiesel cycleHampson–Linde cycleOtto cycleRankine cycleexpander cyclecombustion tap-off cyclegas-generator cycleHumphrey cycleEricsson cycleAtkinson cycleBordwell thermodynamic cyclestaged combustion cycleHigh-efficiency hybrid cycleKleemenko cycleMiller cycleLenoir cyclePseudo Stirling cycleScuderi cycleBrayton cycleSolar–hydrogen energy cycleSiemens cycleMixed/dual cycleKalina cycleStirling cycleThermogravitational cycleFickett–Jacobs cycleRankine-Hirn cycle

Where this came from

wikidata · CC0 1.0

Source repository Registry entry point

Drafted structure

Bundle to layer to finding to question, as the second pass will find it: 4 bundles · 8 layers · 8 findings · 16 questions.

Cycle Which cycle.

Cycles differ.

Type

Named cycle.

Type

Cycle type.

  1. Which thermodynamic cycle is used here? definition
  2. What processes make it up? definition

Diagram

PV and TS.

Diagram

Diagrams.

  1. How does the cycle appear on a PV or TS diagram? definition
  2. What does the enclosed area mean? definition
Performance Efficiency.

Limits apply.

Efficiency

Ideal efficiency.

Efficiency

Efficiency.

  1. What is the ideal efficiency for these conditions? measurement
  2. How does it compare with the Carnot limit? measurement

Real

Losses.

Real

Real performance.

  1. What losses reduce real-world efficiency? definition
  2. What is typical measured efficiency? provenance
Applications Machines.

Cycles power machines.

Engines

Cars and turbines.

Engines

Engines.

  1. Which machine uses this cycle? definition
  2. How is it improved in practice? provenance

Heat pumps

Refrigeration.

Heat pumps

Heat pumps.

  1. How does a heat pump cycle move heat? definition
  2. What is its coefficient of performance? measurement
Learning Teaching.

Clear steps help.

Calculate

Worked examples.

Calculate

Calculations.

  1. How can the cycle be analysed step by step? action
  2. Which property data are needed? provenance

Senses

Disambiguation.

Senses

Other senses.

  1. Is another kind of cycle, such as a business cycle, meant? boundary
  2. Which entry fits? action

What the second pass must settle

  • Should each cycle be a separate entry?
  • How should property tables be linked?
  • How should real-cycle losses be described?
Draft as JSON