Chp 5 Cooling load computations Question and answers rated A+ 2024/2025
For large building floor areas, a minimum of ---- per floor (one zone for each exposure: north, south, east, west, and an interior zone) is recommended. - correct answer five zones
Before the recent technological advance...
Chp 5 Cooling load computations
For large building floor areas, a minimum of ---- per floor (one zone for each
exposure: north, south, east, west, and an interior zone) is recommended. -
correct answer ✔five zones
Before the recent technological advancements that led to high-performance
glazings (i.e., use of tints, films, and coatings), a typical window with one or
two layers of glass allowed about ___to _____ of the solar energy to enter a
building. - correct answer ✔75%/85%
The cooling load - correct answer ✔is the heat the HVAC equip must remove
to maintain the building interior at inside design conditions
What are three basic methods that are used to estimate heating energy
consumption and operating costs? - correct answer ✔hour-by-hour
simulation
degree-day energy estimation
Bin energy estimation
cooling load temperature difference/ solar cooling load factor/ cooling load
factor (CLTD/SCLF/CLF) - correct answer ✔derived from the transfer
function method and uses tabulated data to to simplify the calculation process
Oversizing a cooling system adversely influences efficiency and performance.
true/false - correct answer ✔True
In performing cooling load calculations for commercial buildings, the spaces
need to be divided into ____ that have _____ load parameters - correct
answer ✔zones/similar
, Heat gain - correct answer ✔the amount of heat that a building space
accumulates from external sources (high outside temp and solar radiation)
and internal sources ( occupants, lights, appliances)
convective and latent heat flows are instantaneous; gain _____ loads - correct
answer ✔equal
quantity of heat gaines - correct answer ✔expressed in btu or w-hr
what is the most basic and least accurate method in computing the cooling
load of a building? - correct answer ✔rule of thumb method
heat balance method - correct answer ✔indicates the balance of all heat
transfer in a room to determine the cooling load
radiant time series - correct answer ✔uses an array of repetitive equations to
reproduce accurate results and is less dependent on approximated data
transfer function method - correct answer ✔is a derivative of the heat
balance method
total equivalent differential/ time averaging - correct answer ✔was the
preferred method for hand or simple spreed sheet calculation b4 the
introduction of the CLTD/SLF/CLF method
admittance method - correct answer ✔allows calculation of overheating
temperature of the room, or peak cooling load calculation for a constant
environmental temperature
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