Process Controls

Y max = 250

dt

J

N

Q

K

K3

K4

K7

K8

TC

TC = Critical Time
The time when humanity develops the knowledge to use fosil fuel. If TC is above 320 it means fossil fuels are not used.

Two sources mini-model simulation

Se seu navegador não suportar HTML5 você verá esta mensagem.

Quick Test: after TC consider a time of starting chaos (DT)

New Parameters

Dt

K7

K8

Make your choice

tank

Description

A system of this type uses two energy sources, one renewable, the other nonrenewable. When the nonrenewable source is used up, the growth declines back to a steady state based on the renewable source.

Variables

  • N = nonrenewable energy source
  • J = steady inflow of energy
  • Q = stored biomass
  • K*JR*Q = part of J that goes into the system
  • K3 = increasing factor of Q
  • K7 = increasing factor of Q
  • K8 = decreasing factor of Q

Equations

  • DN = -K4*N*Q
  • JR = J/(1 + K*Q)
  • DQ = K7*N*Q + K3*JR*Q - K8*Q

Simunlation

The graph shows the changes of N (red) and Q (green) over a time period.

Examples

  • A population of microbes which decompose a pile of leaves and the leaves falling from the trees.
  • The world economy growing up on both fossil fuels and renewable sources.

"What if" Experiments

  • Think about the renewable and nonrenewable sources of our economy:
  • If we find more fuels (N), will our industrial society peak higher or last longer?
  • If pollution increases giving us less available clear sun and rain (J), how will this affect the growth and future of the economy?