Shared Flashcard Set

Details

HVAC
Final
62
Architecture
Undergraduate 3
12/12/2010

Additional Architecture Flashcards

 


 

Cards

Term
Sustainability
Definition
The concept of ______ is roughly equivalent to meeting the needs of today's generation without detracting from the ability of future generations to meet their needs.
Term
Global Warming
Definition
_______ is the term commonly used to describe the general rise in average annual temperature experienced on Earth.
Term
Radiation
Definition
 The transfer of thermal energy via electromagnetic waves
Term
Convection
Definition
The transfer of thermal energy from moving fluid to a solid surface
Term
Conservation equation
Definition
_______ the balance of flows and exchange in amount stored of something within fixed "control volume"
Term
Conservation of mass
Definition
______ means that mass is neither destroyed or created
Term
Latent heat transfer
Definition
________ is the transfer of heat related to moisture change
Term
sensible heat transfer
Definition
________ is the transfer of heat related to temperature change
Term
Conduction
Definition
________ is the transfer of thermal energy through a solid
Term
Density and/or specific
Definition
________ is one of the physical material properties that determine the amount of thermal mass in a given volume of a substance
Term
sensible
Definition
________ heat transfer is related to changes in temperature
Term
latent
Definition
________ heat transfer is related to changes in moisture level
Term
psychrometrics
Definition
________ is the study of mixtures of air and water vapor
Term
evaporative cooling
Definition
________ is a process which increases the amount of moisture in an air stream in order to reduce its temperature
Term
solar power
Definition
________ is an example of renewable energy source
Term
 stack ;cross
Definition

________ and ________ are two types of natural ventilation that are used to cool a building naturally

 

Term
window
Definition

a ________ is a building element that is common to all direct gain heating strategies

 

Term
trombe wall and/or water wall
Definition

a/an ________ is a technology that is an example of a type of indirect gain heating strategy

 

Term
skylight
Definition

a/an ________ is an example of a device/technology that brings in more natural light from above and thus tends to admit in more daylight per unit area

 

Term

temperature, humidity, and movement

Definition
name three examples of air factors influencing thermal comfort
Term
temperature and proximity
Definition
name two examples of surface factors that influence thermal comfort
Term
metabolic rates and clothing
Definition
name two examples of human factors influencing thermal comfort
Term
low emmittance (low e)
Definition

a/an ________ coating on a window glass reduces radiation exchange between panes and can lower the overall u-value significantly, sometimes between 30-40%

 

Term
awning
Definition

a/an ________ is an example of a constructed shading device that is attached to the exterior of a building

 

Term
true
Definition

True/False

mass will naturally flow from an area of higher to lower pressure provided that no external forces are acting on the system

Term
false
Definition

True/False

coal mined from sites within illinois is considered a renewal resource

Term

true

buildings consume 33-40% of energy in the US

Definition

True/False

Currently, energy consumed within buildings exceeds the energy consumed nationally in the USA in either the industrial or the transportation sector

Term

False

80% is required

Definition

True/False

ASHRAE Standard 55 states that 100% of all building occupants must be comfortable in order to achieve compliance

Term
false
Definition

True/False

concrete is a good insulating material because it has relatively low thermal conductivity and thus does not need to be combined with layers of insulation

Term
dry bulb temperature
Definition
___________ is the temperature of air as measured by a standard thermometer
Term
wet bulb temperature
Definition
___________ is the temperature of air as measured by a wetted thermometer
Term
relative humidity (RH)
Definition
___________ is the measure of saturation; the fraction of how much water vapor is in the air to how much could be in the air
Term
dewpoint temperature
Definition
___________ is the temperature at which moisture from air begins to condense on surface
Term
insolation
Definition
___________ is solar radiation that reaches the surface of the earth
Term
altitude
Definition
___________ angle between horizon and sun's position above horizon
Term
azimuth
Definition
___________ is the angle along horizon between projected position of sun and true (solar) south
Term
solar time
Definition
___________ is the time at a location determined by the sun's position
Term
overhang/wing/louver/eggcrate
Definition
name an example of fixed shading device
Term
fresh air
Definition

according to ASHRAE Standard 62, designers should specify high performance filters/electrostatic devices inside the ductwork of a system and/or introduce ___________ in the system in order to maintain indoor air quality

 

Term
sick building syndrome
Definition
___________ is the term used to describe conditions within a structure when 20% of the occupants complain of acute discomfort for 2 weeks or longer and the discomfort ends when they exit the building
Term
dual duct
Definition

a/an ___________ is an example of an all air space-conditioning system

 

Term
fan coil
Definition

a/an ___________ is an example of an air-water space-conditioning system

 

Term
fan
Definition

the prime mover of air (that is, the device that causes the air to move) in a force air system is called a/an ___________

 

Term
pump
Definition

the prime mover of water in a hydronic system is called a/an ___________

 

Term
diffuser
Definition

the endpoint of the supply duct in an all-air system or the component that delivers air from the duct into the space is called a/an ___________

 

Term
coefficient of performance
Definition

the efficiency of a chiller can be measured by taking the ratio of the usable refrigeration to the heat or work input required. the ___________ is one such efficiency measure

 

Term
refrigerant
Definition

a/an ___________ is the generic term for a working fluid used in an HVAC system that absorbs heat/energy in one area and transfers it to another area

 

Term
redundancy
Definition

selecting several smaller pieces of equipment rather than one very large device to maintain continuity of building operation and to improve overall operating efficiency of the primary system is called ___________

 

Term
true
Definition

True/False

For chillers, the higher the evaporative environment temperature the more efficiently the chiller will operate

Term
true
Definition

True/False

condensing boilers are more efficient than non-condensing boilers because the presence of water in the system is a result of an increase in the amount of heat transfer to the water that is being heated

Term
true
Definition

True/False

supplying air into spaces from the ceiling will result in better mixing of air within the space than supplying air into spaces from the side wall

Term
false
Definition

True/False

fresh outside air should be taken into the mechanical system near the loading dock of a building because the constant movement of vehicles will improve the quality of air drawn into the system

Term
true
Definition

True/False

in general, air should be exhausted from the building at as high a point as possible to take advantage of wind and buoyancy  effects to take the "dirty" air away from the building

Term
Thermal; solar
Definition

the greenhouse effect can occur when sunlight passes through a material with high ___________ absorptivity and low ___________ absorptivity 

 

 

Term
Daylighting factor
Definition
___________ is the percent of outside light under overcast skies that is available indoors
Term
rock bed
Definition
a/an is an example of active solar heating
Term
evaporative cooling/ cool tower/ roof pond/ earth tube/ green roof
Definition

 ___________ is an example of a passive design strategy for cooling

 

Term
Building related illiness
Definition

 

___________ is any disease caused by exposure to indoor contaminants and that is felt long after exiting the building

Term
chiller
Definition

a/an ___________ is a collection of equipment that provides chilled water or refrigerant for secondary system

 

Term
true
Definition

True/False

heat pumps can provide cooling or heating

Term
boilers
Definition

a/an ___________ is a piece of equipment that provides hot water or steam for various uses

 

Term
hydraulic/traction elevator
Definition

a/an ___________ is a type of elevator

 

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