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+---
+title: Airconditioning
+created_date: 2024-12-05
+updated_date: 2024-12-05
+aliases:
+tags:
+---
+# Airconditioning
+## The Thermodynamic Refrigeration Cycle
+The refrigeration cycle explains how thermodynamically the cooling (or heating) works. 
+![[Pasted image 20241205105435.png]]
+1. In the compressor, a refrigerant gas is compressed and thus increases in pressure and therefore temperature.
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+---
+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
+> 
+