A building structural element that is built onto a building's exterior along the inner edges of all the windows, and extending from the ground to the eaves. Wingwalls help ventilate rooms that have only one exterior wall which leads to poor cross ventilat ...

Consist of three main layers. The top layer is near ambient and has low salt content. The bottom layer is hot, typically 160 F to 212 F (71 C to 100 C), and is very salty. The important gradient zone separates these zones. The gradient zone acts as a tran ...

The amount of heat required to raise the temperature of one pound of water one degree Fahrenheit; equal to 252 calories.

A holding pond for livestock manure that is designed to anaerobically stabilize manure, and may be designed to capture biogas, with the use of an impermeable, floating cover.

Those elements of building used to control the interior climate.

A large number of thermocouples connected in series.

An electricity supplier rate structure in which the per unit price of electricity decreases as the amount of energy increases. Normally only available to very large consumers.

A material used to seal areas of potential air leakage into or out of a building envelope.

Draft that is caused by temperature differences in the air.

Ratio of useful energy output of a device to the energy input, averaged over an entire heating season.

A type of impulse hydropower turbine where water passes through nozzles and strikes cups arranged on the periphery of a runner, or wheel, which causes the runner to rotate, producing mechanical energy. The runner is fixed on a shaft, and the rotational mo ...

A component of a hydropower plant; a pipe that delivers water to the turbine.

A power line for supplying electricity within a specified area.

The cutting of a grid pattern of grooves in a semiconductor material, generally for the purpose of making interconnections.

A mound of dirt next to exterior walls to provide wind protection and insulation.

An agency of the U.S. Dept. of Agriculture that makes loans to states and territories in the U.S. for rural electrification and the furnishing of electric energy to persons in rural areas who do not receive central station service. It also furnishes and i ...

Energy produced by the internal heat of the earth; geothermal heat sources include: hydrothermal convective systems; pressurized water reservoirs; hot dry rocks; manual gradients; and magma. Geothermal energy can be used directly for heating or to produce ...

Generation of energy at the location where all or most of it will be used.

The unit of magnetic field intensity equal to 1 dyne per unit pole.

These are separate and distinct organizational agencies within the U.S. DOE that market power at federal multipurpose water projects at lowest possible rates to consumers consistent with sound business principles. There are five PMA's: Alaska Power Admini ...