heat transfer
Let an agent explain the modes of heat transfer and their laws, relay analysis methods and equipment from thermal engineering references, describe applications from insulation to heat pumps and waste heat recovery, and distinguish heat transfer from thermodynamics and heat itself.
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 explain the modes of heat transfer and their laws, relay analysis methods and equipment from thermal engineering references, describe applications from insulation to heat pumps and waste heat recovery, and distinguish heat transfer from thermodynamics and heat itself.
The movement of thermal energy from one body or region to another because of a temperature difference, by conduction through matter, convection in moving fluids including natural convection driven by buoyancy, and thermal radiation, together with phase change processes such as boiling and condensation; heat transfer is the basis of heat exchangers, insulation, heat pumps and refrigeration cycles, waste heat recovery and thermal management of electronics, and is analysed with coefficients, resistances and dimensionless numbers.
What it is for: Not applicable; a physical process.
It can be explain the modes; relay analysis methods; describe applications; distinguish from thermodynamics.
Distinguishing features
Three modes
Driven by temperature difference
Rate process
Engineering coefficients
What it looks like
Not a visible object; temperature changes and flows.
Physical character
copper thermal conductivity: about 400 W/(m K)
Stefan-Boltzmann constant: 5.67e-8 W/(m^2 K^4)
key dimensionless numbers: Nusselt, Reynolds, Prandtl, Grashof list
How it is recognised
Movement of thermal energy
Conduction, convection including natural convection, radiation, phase change; heat pumps, waste heat recovery
Thermodynamics deals with energy and equilibrium; heat is the energy transferred
Related models
is a kind of - in registry terms
is governed by - for conduction
is applied in - design
underlies - and refrigeration cycles
In practice
Families and kinds
conduction
forced and natural convection
thermal radiation
boiling and condensation
heat exchangers and heat pumps
waste heat recovery and thermal management
Standards and regulation
Building insulation standards and U-value rules
Heat exchanger design codes such as TEMA
Energy efficiency rules for heat pumps
Failure modes and hazards
Confusing heat with temperature
Overheating from poor thermal management
Misapplying correlations outside their range
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.
Understand What heat transfer is.
Science.
Modes
Modes.
Modes
Modes.
- How do conduction, convection, radiation and phase change transfer heat? definition
- Is the question about heat transfer, thermodynamics or temperature? boundary
Laws
Laws and coefficients.
Laws
Laws.
- What are the Fourier law, Newton law of cooling and Stefan-Boltzmann law, and what are heat transfer coefficients? definition
- Which entry fits the specific law? action
Analyse Analysis.
Practice.
Methods
Methods.
Methods
Methods.
- How are thermal resistances, dimensionless numbers and numerical methods used to analyse heat transfer? action
- Which references are standard? provenance
Natural
Natural convection.
Natural
Natural.
- How does natural convection arise, and how is it modelled with the Grashof and Rayleigh numbers? provenance
- Which sources are cited? provenance
Apply Applications.
Application.
Equipment
Equipment.
Equipment
Equipment.
- How do heat exchangers, heat pumps, refrigeration cycles and waste heat recovery use heat transfer? provenance
- Which entry fits the specific equipment? action
Buildings
Buildings and electronics.
Buildings
Buildings.
- How do insulation and thermal management of electronics apply heat transfer? provenance
- Which entry fits thermal insulation? action
Context Nature and history.
Context.
Nature
Nature.
Nature
Nature.
- How does heat transfer shape weather, oceans and living bodies? provenance
- Which entry fits atmospheric convection? action
History
History.
History
History.
- How did Fourier, Newton and Stefan develop the theory of heat transfer? provenance
- Which entry fits the history of thermodynamics? action
What the second pass must settle
- Should conduction, convection and radiation be separate primary entries?
- How should engineering references be linked?
- The registry entry has merged aliases including a nuclear test effect; should it be split off?