2025_Symposium/Outline.md

2025 Symposium - Chiller Talk

Introduction : time: 2 minutes

• Who am I
• Why I'm here
• Brief interests

Reason for talk : time 5 minutes

Refrigerant Changes

High odds we'll move to flammable refrigerant (10-15 year speculation)

Get comfortable

• Help get comfortable with the idea of using chillers in residential markets.
• Draw similarities and differences between current equipment.

Pros / Cons

History : time 5 minutes

It would be good to explore a little of the history of hydronic systems here maybe just touch on my companies history, idk ??

Concepts : time 24

An introduction to some of the concepts and similarities. Start building a pros / cons list that we can go through at the end.

What do we do? (audience participation) time: 1-2 minutes

What's the primary objective of HVAC?

• Provide healthy, safe, and comfortable environment.

We move heat from one place to another, generally through refrigerant and air circulation... Water IS a refrigerant. (could perhaps nerd out on specific heat, air = 0.24, water = 1.0, refrigerat=?? [high that's why we use it, gonna depend on the blend])

• Add specific-heat of water to the pro's list here, maybe also to cons when compared to refrigerant ??

House Complexity : time 1-2 minutes

A home is made by harmony between many different mechanical and physics driven systems.

• Shell / envelope
• Ventilation / exhaust
• Electrical
• Plumbing / hot water
• HVAC
• and more...

HVAC covers / is the realm of a lot of these systems.

System Complexity : time 5 minutes

• Show a well designed traditional system here (fresh-air, dehumidification, inverter, etc.).

  • we do not want to get rid of moving air, so these will still apply
  • talk about things like filtration, safety switches, controls / thermostats, inverter boards.

• We have to design the distribution system.

  • Explore the idea of infrastructure vs. the plant here.
  • The infrastructure piece will likely have a longer life expectancy (pro)
  • More upfront cost design / materials (con)
  • glycol in cold climates
  • piping systems are fun / works of art (pro/con)

• Inherent mis-trust for things we don't understand / are used to. (big, con?)

Chiller / Heat Recovery Concepts : time 15 minutes

The meat and potatoes of the talk, most likely

• Show cool things that are unlocked with using water.
  • ability to dump heat into other sources, such as pools
  • ability to incorporate different heat sources (dual fuel, pellets, wood, etc.)
• Introduce the concept of heat-recovery and dhw generation.
  • unlocks dehumidification with a high COP
• Puts more eggs in one basket (con)
  • can be stacked / redundant (pro)
• Over sizing less of a problem (buffer tank concepts)