The Basics: Energy Audit Q: What is an Energy Audit? Ans: Simply, an Accounting of energy use Q: Audit Necessary to Obtain Energy Savings? Ans: No, but... Q: Then why do it? Ans: Help identify best opportunities
More Basics: What Uses Energy? - Building- People - Building Guts
Before a (Physical) Audit Dont guess about opportunities & act Do this instead: l Get a (better) sense for whats important l Sense what you can control l Focus approach/efforts accordingly How?
Energy Audit Approach Step 1: Obtain Historical Energy Consumption Step 2: Get Idea of how Total Energy breaks into Use Categories Step 3: Verify (Assumptions) in Step 2 with (More) Research Step 4: Visit Site: Verify Research & Look for Opportunities
Step One: Energy History
Step Two: Energy Breakdown
Natural Gas Subgroups at Dorm
Electricity Subgroups at Dorm
Bottom Line: Limitations Natural Gas Electrical
Step Three: (In-Depth) Research Research Assumptions on Energy Use Categories: l Building plans/blueprints/specifications l Talk to Building Experts
Step Four: Verify Building Walkthrough l Look at the Building/Equipment l Talk to the Occupants
What are We Looking For? §Verify what learned from Plans/Experts l Equipment* Size l Equipment Efficiency l Equipment Location l Equipment Condition §Why do this? l The Plans/Experts arent always right * Equipment = Furnaces, Air Conditioners, Lighting, Kitchen Equipment, Fans, Etc., Etc.
Building Walkthrough What am I looking for?
Summarize Data Example: Natural Gas
Problem §Students dont have a budget to replace equipment
Auditing for Other Opportunities §Waste §Excess Consumption §Comfort
Best Opportunities? Natural Gas Electrical
Best Electric Opportunities? Natural GasElectrical
Plug Load Opportunities?
Random Sample §Room X: 3500 watts of appliances §Room Y: 500 watts of appliances §Room Z: 350 watts of appliances
Which Room Uses More Energy? §Room X: 3500 watts of appliances §Room Y: 500 watts of appliances §Room Z: 350 watts of appliances §Room X: 3500w? * ?? hour/day = ?? kWh/day §Room Y: 500w? * ?? hours/day = ?? kWh/day §Room Z: 350w? * ?? hours/day = ?? kWh/day ?? = People Behavior/Lifestyle