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Energy Adventure

with Joules the Cow

View the Energy Summary

Level 2: How We Heat and Cool Campus Buildings

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  2. Engineering
  3. Energy Adventure
  4. Level 2: How We Heat and Cool Campus Buildings
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In this level you will learn:

Central Heating and Cooling Plant
Boilers vs Chillers Uses
How to Measure Energy Use


A Central Campus Energy Supply

The campus encompasses buildings of all shapes and sizes, a central heating and cooling plant, a huge solar farm, and much more. The staff members of the Facilities Management Department work around the clock to keep the whole system running.​​

 

The Central Heating and Cooling Plant (CHCP) of UC Davis is where the real energy action happens. 

 

  • From this plant, our energy supply is distributed to the many buildings across campus. 
  • The CHCP has boilers that take in natural gas to make steam.
  • This steam is piped around the campus and used to heat our buildings. 
  • Chillers at the CHCP use electricity to make chilled water and send it to the buildings via underground pipes, the same as the steam system.

 

The CHCP uses natural gas to make steam and electricity to make chilled water to heat and cool campus buildings.

 

Heating and Cooling in Campus Buildings

In the buildings, an air handler circulates conditioned air that has been heated (using steam) or cooled (using chilled water). This conditioned air is what you feel as heating and cooling in the spaces.

The network of underground heating and cooling pipes
The underground network of campus heating and cooling pipes.

After being used to heat and cool the air, the steam and chilled water return to the Central Heating and Cooling Plant (CHCP) as steam condensate and cold water.

  • This is referred to by campus energy nerds as the campus steam and chilled water loops. By returning back to the Central Heating and Cooling Plant, we're recycling our resources and running a more energy-efficient campus. 

 

Measuring Energy Use
  • There are over 1,200 buildings on the main campus, and 68% of them are currently metered for their energy use. 
  • At UC Davis we primarily measure electricity, steam, and chilled water use in our buildings.
  •  Electricity is used for lighting and plug loads, steam is for heating, and chilled water is needed for cooling purposes. 
  •  On the left is an example of an electricity meter. 

 

Converting metered energy use to analyze energy use.

 

a stacked bar graph of energy usage

 

  • When energy use is metered, it’s measured in specific units depending on the type of energy.
  • For the most common energy meters on campus, electricity is measured in kilowatt-hours, chilled water is measured in tons, and steam is measured in pounds of condensate.
  • To get a picture of the total energy use in a building, we add up the electricity, chilled water and steam measurements. To do this, we need to convert them into the industry standard unit, the kilo-British thermal unit (kBtu). ​This lovely graph shows all of our energy sources stacked on each other in kBtus. 

 

 

 

Your Journey Unfolds With Each Step!

Level 2 Embarked

 

Level 2 Joules

Joules unlocked a Backpack! 

 

Continue to Level 3

Home  |  Level 1  |  Level 2

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