---
title: Thermodynamics
created_date: 2024-12-05
updated_date: 2024-12-05
aliases:
tags:
---
# Thermodynamics
## Course Recap
- Different primary energy forms (chemical, nuclear, solar, kinetic) need to be converted into useful energy (mechanical, electrical). 
- Applications are engines, aircraft/rocket propulsions, wind turbines, fuel cells, steam and gas turbines, combustion, compressors, pumps
- Thermodynamics provides us with tools for design, performance assessment, improvements and optimization.
- Thermal efficiency:
	- $$ \eta_{thermal} = \frac{Useful work/energy}{energy provided}$$
	- Combustion: gasoline ~35%, diesel ~42%
	- fossil power production: ~35-48%
	- solar thermal power production: ~18-22%

### Laws of Thermodynamics


> [!important] 0th law: Equilibrium
> If two systems are both in thermal equilibrium with a third system, then they are in equilibrium with each other.

This law establishes the concept of temperature, which is a fundamental and measurable prop

> [!important] 1st law: Energy Conversation
>