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Test 1 Env Tech
Heat transfer, Sustainability
41
Architecture
Undergraduate 3
08/30/2011

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Cards

Term
Thermal processes of a building are analogous to those of the human body.The building ______ keeps heat in or out –the building’s various ___ ____ regulate temperature.
Definition
skin, circulation systems
Term
the 3 Forms of heat are:
Definition
1.Sensible Heat
2.Latent Heat
3.Radiant Heat
Term
sensible heat:
Definition
The increase in heat or when heat is removed from an object and its temperature falls, the heat removed is also.
Term
Heat that causes a change in temperature in an object is called _______.
Definition
sensible heat
Term
__ heat is quantifiable through the senses.
Definition
sensible
Term
The heat flow mechanism within the object is called _______. Molecules must be close to each other to collide & transfer heat energy.
Definition
conduction
Term
The heat required to break bonds between the molecules of a substance to change the state from a solid to a liquid.
Definition
Latent heat
Term
Heat that causes a change of state with no change in temperature is called ____ heat.
Definition
latent
Term
T/F: Latent heat does not affect the temperature of a substance -for example, water remains at 100°C while boiling. The heat added to keep the water boiling is latent heat.
Definition
true
Term
Latent heat of fusion=
Definition
melt a solid into a liquid
Term
Latent heat of vaporization=
Definition
change a liquid into a gas
Term
Latent heat of condensation=
Definition
change a gas into a liquid
Term
Latent heat is the ...
Definition
large amount of energy required to break the bonds of molecules and induce a change in the state of a material (phase change).
Term
The heat transferred by electromagnetic waves
Definition
radiant
Term
The___/___ of the radiation emitted is a function of the temperature of the object.
Definition
wavelength / frequency
Term
_____is not affected by gravity.
Definition
Radiation
Term
Solar radiation is _____ wave.
Definition
short
Term
Thermal radiation is ___ wave.
Definition
long
Term
Four (4) possible interactions include:
Definition
. Transmittance
. Absorptance
. Reflectance
. Emittance
Term
in Transmittance the wave__ ___ a material.
Definition
(passes through)
Term
in Absorptance the wave ___.
Definition
is converted to sensible heat within the material.
Term
in Reflectance the wave is
Definition
reflected off of the surface
Term
in Emittance the wave is __.
Definition
given from the surface, reducing sensible heat
Term
the second law of thermodynamics:
Definition
energy (heat)transfer takes place in one direction, from a higher grade to a lower grade state…seeking an even distribution of heat energy wherein all objects will end up at the same temperature.
Term
Convection:heat is
Definition
exchanged between a fluid (typically air) and a solid.
Term
Conduction:heat is
Definition
transferred directly from molecule to molecule.
Term
Radiation:heat
Definition
flows via electromagnetic waves from hotter surfaces to detached colder ones –across an empty space.
Term
The rate of radiant heat exchange between two surfaces depends on:
Definition
•the relative temperature of the surfaces,
•their releasing and absorptive qualities
Term
______is a “middleweight” material with highest heat capacity.It takes only 1/3 as much ______ to hold the same amount of heat as concrete.
Definition
water, water
Term
Water is a “middleweight” material with highest heat capacity.It takes only ___as much water to hold the same amount of heat as concrete.
Definition
1/3
Term
The Thermal resistance of wood is twelve times as great as that of concrete, but the heat capacity of concrete is much greater. Therefore conductivity through the concrete wall will be __________.
Definition
longer (time lag).
Term
Time lag results in :
Definition
the delay in heat conduction/flow.
Term
____ joules = 1 Btu
Definition
1,000
Term
Btu means
Definition
British Thermal Units
Term
U-factor measures
Definition
the rate of heat loss, or how well a material or assembly prevents heat from escaping.
Term
R-factor measures
Definition
the effective insulating value of that material or assembly
Term
Spill-light or waste light is ...
Definition
one area of waste related to the built environment.
Term
Solar
Wind
Biomass
Hydroelectric
Geothermal
these are examples of ___.
Definition
RENEWABLE resources
Term
Fossil Fuels
Oil
Natural Gas
Coal
Nuclear Fission
Definition
NON-RENEWABLE resources
Term
__% of our energy used is from non-renewable resources.
Definition
92
Term
This program seeks carbon neutrality by a certain year reducing dependence on fossil fuels by 10% every 10 years.
Definition
Architecture 2030
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