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## Energy Terms

### Building Overall Energy Loss Coefficient-Area Prod

The factor, when multiplied by the monthly degree-days, that yields the monthly space heating load.

### Building Overall Heat Loss Rate

The overall rate of heat loss from a building by means of transmission plus infiltration, expressed in Btu per hour, per degree temperature difference between the inside and outside.

### Bulb

The transparent or opaque sphere in an electric light that the electric light transmits through.

### Bulb Turbine

A type of hydroturbine in which the entire generator is mounted inside the water passageway as an integral unit with the turbine. These installations can offer significant reductions in the size of the powerhouse.

### Bulk Density

The weight of a material per unit of volume compared to the weight of the same volume of water.

### Burner Capacity

The maximum heat output (in Btu per hour) released by a burner with a stable flame and satisfactory combustion.

### Burning Point

The temperature at which a material ignites.

### Bus (electrical)

An electrical conductor that serves as a common connection for two or more electrical circuits; may be in the form of rigid bars or stranded conductors or cables.

### Busbar

The power conduit of an electric power plant; the starting point of the electric transmission system.

### Busbar Cost

The cost of producing electricity up to the point of the powerplant busbar.

### Bypass

An alternative path. In a heating duct or pipe, an alternative path for the flow of the heat transfer fluid from one point to another, as determined by the opening or closing of control valves both in the primary line and the bypass line.

### Cage

The component of an electric motor composed of solid bars (of usually copper or aluminum) arranged in a circle and connected to continuous rings at each end. This cage fits inside the stator in an induction motor in channels between laminations, thin flat ...

### Calorie

The amount of heat required to raise the temperature of a unit of water, at or near the temperature of maximum density, one degree Celsius (or Centigrade [C]); expressed as a "small calorie" (the amount of heat required to raise the temperature of 1 gram ...

### Calorific Value

The heat liberated by the combustion of a unit quantity of a fuel under specific conditions; measured in calories.

### Candela

A unit of luminous intensity; the magnitude to the candela is such that the luminance of the total radiator, at the temperature of solidification of platinum, is 60 candelas per square centimeter.

### Candle Power

The illuminating power of a standard candle employed as a unit for determining the illuminating quality of an illuminant.

### Capability

The maximum load that a generating unit, power plant, or other electrical apparatus can carry under specified conditions for a given period of time, without exceeding its approved limits of temperature and stress.

### Capability Margin

The difference between net electrical system capability and system maximum load requirements (peak load); the margin of capability available to provide for scheduled maintenance, emergency outages, system operating requirements and unforeseen loads.

### Capacitance

A measure of the electrical charge of a capacitor consisting of two plates separated by an insulating material.

### Capacitor

An electrical device that adjusts the leading current of an applied alternating current to balance the lag of the circuit to provide a high power factor.