Chapter 6 (Energy & Power)

Front 1

active solar energy collection

Back 1

Systems that use circulating pumps and fans to collect and distribute heat.

Front 2

azimuth path

Back 2

The sun's movement from east to west.

Front 3

closed loop solar collection

Back 3

Systems in which a collection medium is used to collect the heat and transfer it
to water or air for
end use.

Front 4

compound parabolic collector

Back 4

A combination of a flat-plate collector and a parabolic collector, offering advantages of both types.

Front 5

condensing unit

Back 5

In solar cooling operations, the unit where refrigerant is condensed from a gas back
into a liquid and gives up its heat.

Front 6

conduction

Back 6

The transfer of heat from molecule to molecule, straight through a material or group of materials.

Front 7

convective loop

Back 7

The loop created when convection carries heated air from an isolated gain solar collector up to a structure, and cold air return vents allow cooler air to return to the collector.

Front 8

direct gain approach

Back 8

In this type of system, there are no significant architectural provisions made to collect solar energy, other than facing windows in the proper direction.

Front 9

evaporator

Back 9

A freezing unit used in solar cooling operations.

Front 10

flat-plate collector

Back 10

It is typically stationary, mounted on a rooftop, facing south in the northern hemisphere.

Front 11

indirect gain approach

Back 11

A type of passive solar collection that makes use of a storage medium to store heat for later use.

Front 12

isolated gain approach

Back 12

A type of passive solar collection in which the solar collector is isoiated from the structure to be heated.

Front 13

linear-concentrating parabolic collector

Back 13

An active solar collector that tracks the sun's movement, generating temperatures of hundreds of degrees Fahrenheit on a clear day.

Front 14

open loop solar collection

Back 14

Systems in which the heated water or air is directly distributed for use.

Front 15

parabolic dish collector

Back 15

An active solar collector that is point focusing.

Front 16

passive solar energy collection

Back 16

Systems that do not make use of any externally powered, moving parts, such as circulation pumps, to move heated water or air.

Front 17

phase change

Back 17

A change in a substance's state (liquid, solid, or gas).

Front 18

photoelectric effect

Back 18

The emission of free electrons when photons strike certain metals.

Front 19

photovoltaic cell

Back 19

A cell that converts sunlight directly into electricity.

Front 20

trombe wall

Back 20

A common application of the indirect gain approach.

Front 21

zenith path

Back 21

The height of the sun in the sky.