90 lines
2.5 KiB
Markdown
90 lines
2.5 KiB
Markdown
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---
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author: Akbar Rahman
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date: \today
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title: MMME2047 // Thermodynamics
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tags: [ mmme2047, uni, thermodynamics ]
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uuid: d2b36b74-0661-47d2-8c1f-0bf7747ba7eb
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---
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As this module builds on MMME1048, content covered in pages tagged [mmme1048](/.tags/mmme1048.html)
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may not be covered in these pages.
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# Data and Formula Sheet
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## International Association for the Properties of Water and Steam (IAPWS)
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- <http://iapws.org/relguide/IF97-Rev.html>
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- [backup of IF97-Rev.pdf](./data_and_formulae_sheets/IF97-Rev.pdf)
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## Thermodynamic Tables to Accompany Modern Engineering Thermodynamics (Robert Balmer)
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- [Thermodynamic Tables to Accompany Modern Engineering Thermodynamics](https://ebookcentral.proquest.com/lib/nottingham/reader.action?docID=625295) (paywall)
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- [Pages 1-16](./data_and_formulae_sheets/thermodynamic_tables_robert_balmer.pdf)
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# Terminology
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- State --- condition of a fluid in a particular region, defined by properties
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- Property --- a measurable variable characteristic of a fluid
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- System --- a region of a fluid contained by real and/or imaginary boundaries
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-
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# Lecture 1 (W03/40)
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## Graphical Representation of Properties
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### When is a Graph a Chart?
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Graphs plot the relationship between two component characteristics.
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A chart has the relationship between the two component characteristics but also plots lines of other
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variables on top of them, allowing them to represent more 'dimensions' of the system.
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### Temperature vs Specific Entropy
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The orange line is liquid, the flat blue bit is wet steam, the steep blue bit is superheated steam.
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### Specific Enthalpy vs Specific Entropy
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### Pressure vs Specific Enthalpy
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## Transport Properties
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Transport properties are of use for working out the flow behaviour.
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These are:
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- density
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Density is affected by temperature and pressure. We know perfect gases have equation of
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state but we need to use tables for steam an R134a as they are not perfect gases.
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- viscosity
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Viscosity in all fluids varies with temperature.
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On page 10 of the tables there is viscosity of steam and water liquid stated in dynamic form.
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$$\nu = \frac\mu\rho$$
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(kinematic viscosity = dynamic viscosity / density)
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- Prandtl number
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- thermal conductivity
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# Lecture 2 (W04/41)
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1. Throttle
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2. Evaporator
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3. Compressor
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4. Condenser
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