ENERGY MANAGEMENT HANDBOOK
Utility Company Info -
Energy Audit - Techniques -
Energy Audit Case Studies
Energy Audit - Tools -
Portable Data Logger
Thermography and Infrared Light
Infrared light or thermography is the use of an infrared imaging and measurement camera to "see" and "measure" thermal energy emitted from an object. Thermal, or infrared energy, is light that is not visible because its wavelength is too long to be detected by the human eye; it's the part of the electromagnetic spectrum that we perceive as heat. Unlike visible light, in the infrared world, everything with a temperature above absolute zero emits heat. Even very cold objects, like ice cubes, emit infrared.
The higher the object's temperature, the greater the IR radiation emitted. Infrared allows us to see what our eyes cannot. Infrared thermography cameras produce images of invisible infrared or "heat" radiation and provide precise non-contact temperature measurement capabilities. Nearly everything gets hot before it fails, making infrared cameras extremely cost-effective, valuable diagnostic tools in many diverse applications. And as industry strives to improve manufacturing efficiencies, manage energy, improve product quality, and enhance worker safety, new applications for infrared cameras continually emerge.
Energy Usage Reports / Comparison
Utility Bill Analysis
- Utility Bill Metrics
- Electric Powers Factor - See Electrical Systems
- Electric Bill - Load Factor -
- LF = Total [kWh]/month / ( days / month * 24 hrs / day * maximum demand [kW]
Low Load Factors are a prompt to level the load - spacing out equipment use to avoid setting peaks.
- Load Factors too high, may also not be good. Above 70% is considered good.
- Fraction of Electric Bill that is demand := if demand charges is > 1/2 of the bill, its worth-while looking at spacing out equipment use to avoid setting peaks. Additional Reading
- Energy Use Intensity Comparison
Excellent*: ~10 kWh/ft^2-yr: NREL's RSF
Excellent: ~14 kWh/ft^2-yr: Energy* Mid-High 90s
Good: ~17 kWh/ft^2-yr: Energy* 75
Average: ~20 kWh/ft^2-yr: Energy* 50
Medical Center / Hospitals
Excellent: ~ 33 kWh/ft^2-yr: Swedish Medical Center - Issaquah (ASHRAE Journal)
Average: ~ 73 kWh/ft^2-yr
- Night Walk Check List
- BB NightWalk
Ultra-Sonic Detector -