{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

lecture_0118 - 1 st law of thermodynamics Define the system...

Info icon This preview shows pages 1–9. Sign up to view the full content.

View Full Document Right Arrow Icon
Systems and Equilibria EES 103 18 January 2011
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Systems Characteristics Stocks Flows Sources Sinks Residence time
Image of page 2
Materials balance Conservation of mass General formula Steady-state formula Example: convergence of two streams Steady-state with non-conservative pollutants Example: concentration in a smoky bar
Image of page 3

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
System properties Types of equilibrium Static equilibrium Steady-state equilibrium Dynamic equilibrium Characteristic times Residence time Transit time Mixing time Chemical reaction time Exponential times Equilibrium time
Image of page 4
Feedback loops Positive vs. Negative Definitions Human examples Environmental examples Clicker Quiz: What type of feedback loop is human perspiration ? A) positive B) negative C) neither output does not affect input
Image of page 5

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Energy balance
Image of page 6
Image of page 7

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 8
Image of page 9
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1 st law of thermodynamics Define the system Open systems vs. closed systems General formula ◦ Example: water heater Energy balance 2 nd law of thermodynamics Mechanisms of heat transfer General formula ◦ Example: savings from insulation Further concepts Homeostasis Emergent properties Things to think about: ◦ Scale of system / system boundaries ◦ Internal processes ◦ Equilibrium Coming up… Online task before each class Assignment #1 due Tuesday, January 25 th Office hours: ◦ Professor Berger: Tues 2:30-4:00 Wed night ONLINE 9:00-10:00pm Or by appointment – please email ◦ TA Joey Griggs: Mondays 1-3pm in Gleason Library...
View Full Document

{[ snackBarMessage ]}