Heating Ventilation and Air Conditioning Topics

AC
Abbreviation of Air Conditioning.
Air Changes per Hour
The number of times per hour that the volume of a specific room or building is supplied or removed from that space by mechanical and natural ventilation.
Air Conditioner
An appliance, system, or mechanism designed to dehumidify and extract heat from an area. Usually this term is reserved for smaller self contained units such as a residential system.
Air Conditioning
The process of treating air to simultaneously control its temperature, humidity, cleanliness, and distribution to meet the requirements of the conditioned space.
Air Conditioning Load
The amount of heat per unit time imposed on a refrigeration system or the required rate of heat removal.
Air to Air Heat Exchanger
A method of heat recovery in which the intake and exhaust ducts are brought together at the heat exchanger.
British Thermal Unit
The amount of heat required to raise the temperature of 1 pound of water by 1° Fahrenheit.
CCHP
Abbreviation of Combined Cooling Heat and Power.
Chiller
A device that removes heat from a liquid via a vapour-compression or absorption refrigeration cycle.
Coefficient of Performance
The ratio of cooling or heating to energy consumption.
Coil
An inductive device made by looping turns of wire around a core.
Combined Cooling Heat and Power
Utilises the waste heat from a fuel cell or engine with absorption chillers to provide air conditioning and hot or cold water alongside electricity.
Combined Heat and Power
Electrical power generator set where the waste heat is used to heat water for building heat supply or for industrial processes.
Condenser
An old fashioned name for a capacitor.
Constant Air Volume
A system designed to provide a constant air flow.
Controller
A device that controls the operation of part or all of a system.
Convector Heater
A heat exchange device that uses the heat in steam, hot water, or an electric resistance element to warm the air in a room; often called inaccurately, a radiator.
Cooling Efficiency
The overall efficiency of a cooling system, this may include fans, heat exchangers, pumps etc.
Damper
Device used to reduce unwanted vibrations of a system.
Decipol
An empirical unit of indoor air pollution.
Deep Lake Water Cooling
The heat is rejected to deep lake regions to cool homes and offices, reducing the energy costs.
Degree Day
A unit used in meteorology and engineering to measure the demand for heating or cooling.
Dehumidifier
A machine that removes moisture from the air.
Delta T
A reference to a temperature difference. It is used to describe the difference in temperature of a heating or cooling fluid as it enters and as it leaves a system.
Electric Heating
A system that imparts heat or holds something to be heated, controlled by electric current.
Evaporator
A component in the basic refrigeration cycle that absorbs or adds heat to the system.
Fan Coil Unit
A small terminal unit that is often composed of only a blower and a heating and/or cooling coil, as is often used in hotels, condominiums, or apartments
Fan Design
One of the most important considerations in fan design is that the fan must impart a uniform velocity over it′s entire area.
Fresh Air Intake
An opening through which outside air is drawn into the building.
Fresh Air Make Up
The mixing of fresh air into the recirculated air to keep the air fresh and breathable.
Grille
A facing across a duct opening, often rectangular in shape, containing multiple parallel slots through which air may be delivered or withdrawn from a ventilated space.
Heat Index
A number representing the effect of temperature and humidity on humans by combining the two variables into an apparent temperature.
Heat Load
Terms for the amount of heating (heat loss) or cooling (heat gain) needed to maintain desired temperatures and humidities in controlled air.
Heating Ventilation and Air Conditioning Books
Lists all Heating Ventilation and Air Conditioning Books in the Encyclopaedia
Heating Ventilation and Air Conditioning Calculations
Lists all Heating Ventilation and Air Conditioning Calculations in the Encyclopaedia
Heating Ventilation and Air Conditioning Conversions
Lists all Heating Ventilation and Air Conditioning Conversions in the Encyclopaedia
Heating Ventilation and Air Conditioning Weblinks
Lists all Heating Ventilation and Air Conditioning Weblinks in the Encyclopaedia
Hydronic Heating System
A system that circulates heated water through convectors to heat a building or given space.
Intermediate Fluid
A liquid or gas used to transfer heat between two heat exchangers.
Minimum Outside Air
The lowest amount of fresh air flow that can be allowed into a recirculating system. This limit is set to ensure that the interior air remains safe and comfortable to breathe.
Olf
An empirical unit of indoor odor intensity.
Refrigerant
The working fluid used in refrigerators.
Refrigeration
Controlled transfer of heat from a lower temperature to a higher temperature region.
Refrigeration Oil
Specially prepared oil used in refrigerator mechanism which circulates, to some extent, with refrigerant.
Service Drag
This is drag from air ducted to cooling components.
Smoke Damper
A damper or adjustable louver designed to augment the ventilation of a space during a fire.
Specific Fan Power
The energy efficiency of fan air movement systems.
Steam Condenser
A device for condensing steam from the exhaust of a steam engine or turbine. Also used to condense steam that may be used in industrial processes.
Thermal Insulation
The materials and methods used to reduce heat transfer.
Thermodynamics
The study of energy transfers and transformations.
Ventilation
The controlled exchange of air.
Water Vapour
Water in gaeous form.

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Subjects: Automotive Civil Engineering Thermodynamics