To take in and hold, not just on the serface, but deep into the material, usually forming a mixture out of two or more substances.

A regenerative desiccant.

Drying without gain or loss of heat.

To take in and hold liquid and gas on the serface of a solid but porous material without cusing a change in the basic structure of the material.

A filter that usually follows a dryer for protection of down stream equipment.

A device used to cool air temperature and removed moisture from compressed air. They can be water cooled or air cooled.

Temperature of air surrounding the equipment.

Decomposition process where no oxygen is present and methane gas is produced.

Dew point at atmospheric pressure.

A device that automatically discharges condesate.

A metric unit of pressure equal to 105N/m2 (newtons per square meter). One bar approxinately equals 14.5 PSIG.

Gas recovered from animal waste.

Waste material from animal or vegetable sources.

British Thermal Unit, a measure of heat or enery. One BTU is the amount of heat needed raise temperature of one pound of water by one degree fahrenheit.

A device that controls flow of refrigerant.

Air/Gas flow term, Cubic feet per minute, see also ACFM and SCFM.

Gas released from the beds as coal is recovered.

A material used for drying purposes.

The emperature at which moisture begins to condense.

1. Atmospheric Dew Point – Dew point at atmospheric pressure.
2. Pressure Dew Point – Dew point at pressure.

NOTE: In sellecting an air dryer system only pressure dew point is importent because the compressed air is normally used at pressure.

The reduction in dew point.

Wasted gas produced naturally by the waste collected in a wastewater treatment facility.

The temperature of the air as indicated by an ordinary thermometer.

Dryer that use two desiccant towers. One tower dries the incoming air while the other regenerates the desiccant.

Dryers that use a desiccant tower to dry the air. Typically the desiccant is not regenerated and it is consumed in the dryer process.

Dryers that use a refrigeration system to cool and condense moisture.

The process of adsorption in moving or flowing air. The dynamic capacity of the desiccant to absorb moisture is a function of the temperature and pressure to which it is subjected.

Realease discharged of a substance into the enviroment generally refer to the release of gases or particulate in the air.

A heat exchanger where refrigerant absorbs heat and changes from liquid to gas (evaporation).

A valve that controls the flow of refrigerant.

A device designed to remove solid and liquid particles.

Any naturally occurring organic fuel formed in the earth's crust such as petroleum, coal or natural gas.

Air at ambient temperature, pressure and relative humidity (or atmospheric air at natural conditions).

Typically, a device that removes Hydrogen sulfide (H₂S) from gases.

A New type of energy that produces electricity from a clean renewable energy source. All methods of generating electricity affect the enviroment. This type of energy is more environment friendly.

A device capable of transferring heat from one place or medium to another.

A valve that by-passes hot refrigerant gas from high pressure to the low pressure side of a refrgeration system. The valve is generally used to reduce refrigeration capacity to maintain a desired refrigerant temperature.

Mass of water vaper in per unit volume of air, usually measured as grains/cu. ft. or lbs/cu. ft. or grams/cu. ft.

Mass of water vapor in Mols per Mole of air. The Molal composition of a mixture is proportinal to its partial pressure.

Ratio of the quantity of moisture persent to the quantity that will saturate the air at a givin temperature.

An organic chemical compound of hydrogen and carbon in either gaseous, liquid or solid phase.

Natural waste gas produced by the landfills by the decomposition of the waste in the landfill.

Methane (CH₄) is colorless, oderless and flammable gas which burns in air/oxygen (O₂) with a blue flame and it is also the main hydrocarbon which makes up natural gas. Methane is a reliable and renewable fuel source the if not collected, goes to waste.

One millionth of one meter or 1 meter = 1,000,000 microns.

A device that separates condensate from an air stream.

Amount of substance in elementary entities as atoms.

A regenerative desiccant.

It is 80% – 99% methane with the other hydrocarbons (methane, propane, butane, ect) as well as some nitrogen, oxygen, water, CO2, sulfer and various contaminants.

The pressure that a gas will have if it occupies the total volume of the gas mixture. The total pressure (P) of the mixture is the sum of the partial pressuers i.e. P = P1 + P2 + P3 + …

A heat exchanger that lowers the temperature of the inlet air with the help of the outgoing cold air. In the process the outgoing air is reheated by the incoming air.

Dew point at pressure.

Sum of the atmosheric pressure and the gauge pressure.

Pounds per square inch of pressure as measured by a gauge.

Usually refers to the removal of unwanted air or gas.

A fluid used for heat transfer in a refrigeration unit. Freon 12,22, and 502 are commonly used refrigerants.

A tank-like device used in a refrigeration system that holds liquid refrigerant and allows flow of gas refrigerant.

A heat exchanger that converts gas refrigerant into liquid refrigerant in a refrigeration system.

A storage tank for liquid refrigerant in a refrigeration system.

One ton of refrigeration capacity equals 12,000 BTU/HR.

Reactivation of desiccant.

Air at 100% relative humidity. It takes 7.8 cu. ft. of free air to saturate compressed air at 100 PSIG. Therefore, as log as the atmospheric relative humidity is over 12.9% (7.8 x 12.9 = 100%), whitch it always is, the compressed air from an air compressor is saturated. (This also explains why an air dryer is a must for compressed air system).

"Standard" Cubic Feet per Minute. "Standard" air is defined at 68ºF (20ºC), 14.7 PSIA (1.1 Bar) and 36% relative humidity (density, 0.0750 lbs./cu. ft.).

A regenerative desiccant.

Undesirable trace gases often found in landfill and digester gases. It derives from silicon + oxtgen + methane found in down-the-drain products such as shampoo & cosmetics. They also derived from lubricants, hydaulic fluids, inks, paper, polishes and waterproofing agents.

The process of adsorption in static or still air.

The difference between the actual refrigerant temperature at the evaporator outlet and the theoretical evaporation temperature for the refrigerant pressure at the oulet.

The maximum difference in temperature between any two points within the specified test volume at a given instant.

PIONEER deliquescent desiccant.