Department of Energy (DOE) reports produced after 1991 and a growing number of pre-1991 documents are available free via www.OSTI.gov.

This report is available at no cost from the National Renewable Energy Laboratory (NREL) at www.nrel.gov/publications. List of AcronymsA ampere: unit of current AC alternating current AHRI The Air Conditioning, Heating, and Refrigeration Institute: a North American trade association of air-conditioning, heating, and commercial refrigeration equipment manufacturers ANSI American National Standards Institute: a private nonprofit organization that oversees consensus standards for products, services, processes, systems, and personnel ASHRAE The American Society of Heating, Refrigerating, and Air-Conditioning Engineers: a professional association seeking to advance HVAC and refrigeration systems design and construction BEDAC Building and Energy Data Acquisition and Control: data acquisition and control system used in NREL laboratory facilities ComEd The Commonwealth Edison Company: the sole electric utility provider for Chicago and Northern Illinois DBT dry-bulb temperature: temperature of air when shielded from radiation and moisture DOE U.S. Department of Energy DPT dew-point temperature: temperature of air to achieve saturation at constant pressure and constant water vapor content EPA U.S. Environmental Protection Agency FDA U.S. Food and Drug Administration, a federal agency that develops and enforces food safety regulations GWP global warming potential: a measure of how much heat a greenhouse gas traps in the atmosphere relative to carbon dioxide HFC hydrofluorocarbon: a type of refrigerant composed of organic compounds that contain fluorine and hydrogen atoms with a GWP thousands of times greater than carbon dioxide HFO hydrofluoroolefin: a type of refrigerant composed of unsaturated organic compounds that contain hydrogen, fluorine, and carbon. They are chemically stable and offer lower GWP than HFC refrigerants HP horsepower: a unit of measurement of power HVAC heating, ventilating, and air conditioning Hz hertz: unit of electrical frequency in inch: a unit of measurement of length kg kilogram: a unit of measurement of mass kW kilowatt: a unit of measurement of power kWh/day kilowatt hours per day: a unit of measurement of energy consumed over one 24-h period LAP Laboratory Assessment Plan LED light-emitting diode: a semiconductor light source mL milliliter: a unit of measurement of volume m/s meters per second: a unit of measurement of velocity

Department of Energy (DOE) reports produced after 1991 and a growing number of pre-1991 documents are available free via www.OSTI.gov.