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*N*

Nacelle - The cover for the gear box, drive train, generator, and other components of a wind turbine.

Name Plate - A metal tag attached to a machine or appliance that contains information such as brand name, serial number, voltage, power ratings under specified conditions, and other manufacturer supplied data.

National Rural Electric Cooperative Association (NRECA) - This is a national organization dedicated to representing the interests of cooperative electric utilities and the consumers they serve. Members come from the 46 states that have an electric distribution cooperative.

Natural Cooling - Space cooling achieved by shading, natural (unassisted, as opposed to forced) ventilation, conduction control, radiation, and evaporation; also called passive cooling.

Natural Draft - Draft that is caused by temperature differences in the air.

Natural Gas - A hydrocarbon gas obtained from underground sources, often in association with petroleum and coal deposits. It generally contains a high percentage of methane, varying amounts of ethane, and inert gases; used as a heating fuel.

Natural Gas Steam Reforming Production - A two step process where in the first step natural gas is exposed to a high-temperature steam to produce hydrogen, carbon monoxide, and carbon dioxide. The second step is to convert the carbon monoxide with steam to produce additional hydrogen and carbon dioxide.

Natural Ventilation - Ventilation that is created by the differences in the distribution of air pressures around a building. Air moves from areas of high pressure to areas of low pressure with gravity and wind pressure affecting the airflow. The placement and control of doors and windows alters natural ventilation patterns.

Net Energy Production (or Balance) - The amount of useful energy produced by a system less the amount of energy required to produce the fuel.

Net Generation - Equal to gross generation less electricity consumption of a power plant.

Net (Lower) Heating Value (NHV) - The potential energy available in a fuel as received, taking into account the energy loss in evaporating and superheating the water in the fuel. Equal to the higher heating value minus 1050W where W is the weight of the water formed from the hydrogen in the fuel, and 1050 is the latent heat of vaporization of water, in Btu, at 77 degrees Fahrenheit.

Net Metering - The practice of using a single meter to measure consumption and generation of electricity by a small generation facility (such as a house with a wind or solar photovoltaic system). The net energy produced or consumed is purchased from or sold to the generator, respectively, at the same price.

Net Present Value - The value of a personal portfolio, product, or investment after depreciation and interest on debt capital are subtracted from operating income. It can also be thought of as the equivalent worth of all cash flows relative to a base point called the present.

Nitrogen Dioxide - This compound of nitrogen and oxygen is formed by the oxidation of nitric oxide (NO) which is produced by the combustion of solid fuels.

Nitrogen Oxides (NOx) - The products of all combustion processes formed by the combination of nitrogen and oxygen.

Nominal Capacity - The approximate energy producing capacity of a power plant, under specified conditions, usually during periods of highest load.

Nominal Price - The price paid for goods or services at the time of a transaction; a price that has not been adjusted to account for inflation.

Nocturnal Cooling - The effect of cooling by the radiation of heat from a building to the night sky.

Nonrenewable Fuels - Fuels that cannot be easily made or "renewed," such as oil, natural gas, and coal.

Non-Utility Generator/Power Producer - A class of power generator that is not a regulated utility and that has generating plants for the purpose of supplying electric power required in the conduct of their industrial and commercial operations.

Normal Recovery Capacity - A characteristic applied to domestic water heaters that is the amount of gallons raised 100 degrees Fahrenheit per hour (or minute) under a specified thermal efficiency.

N-Type Semiconductor - A semiconductor produced by doping an intrinsic semiconductor with an electron-donor impurity (e.g., phosphorous in silicon).

Nuclear Energy - Energy that comes from splitting atoms of radioactive materials, such as uranium, and which produces radioactive wastes.

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Electro Industries, Inc., 2150 West River Street, PO Box 538, Monticello, MN 55362 (Map)
Phone: 800.922.4138 or 763.295.4138  Fax: 763.295.4434

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