Chapter 12 Flashcards
Efficient Heating systemes for buildings
Peter needs a boier that is durable, compact and efficient to replace the heater in the small commercial building he manages. So he chooses a:
Cast-iron sectional boiler
John monitors his building’s hot water heating system regularly, remembering that the maximum desirble temperature for water systems with direct space heat transfer equipment is __________
220 degrees fehrenheit
Christine recently began working as a facilities manager in an older building that has ________steam heating system. This system operates below atmospheric pressure, but does not use a vacuum pump
Vapor
Because she knows a buildup of 1/8 inch can reduce heat transfer by 15 percent, Chloe helps prevent _________ buildup in her building’s boiler by adding sodium phospate compounds to the boiler water.
a. contaminants
b. sludge
c. corrosion
d. scale
Scale
Even though electric heating is less efficient than fossil fuel systems, the owner of the building Louis manages prefers electric heating because it is cleaner and its _______ costs are lower
maintenance
While Robin prefers the higher level of control afforded by rectifiers to control the electric duct heaters in her building she makes use of step controllers, which ______ temperature fluctuations.
Minimize
The bricks on the north wall of the sun room in Brian’s newly renovated suite are warmed by sun rays passing through he south glass wall. Observing the raised temperature of the bricks, Brian realizes this is the result of:
passive solar heating
Relatively cheap installation prices help Ivan convince the owner of the small commercial building he manages in the temperate region of North Carolina to install a __________ heat pump system.
a. air to air
b. air to water
c. water to water
d. water to air
air to air
Sam would like to heat a parking garage wating area. A good heating choice would be a _________, because it can heat a small area within a larger open space.
a. heat pump
b. infrared heating system
c. Steam heating system
d. hot water heating system
b. infrared heating system
A recently installed _______ at an office building was put in place to heat outside supply air with waste heat from exhaust, but has not been operating as anticipated. The facilities manager suspects that even though the liquid refrigerant in the system’s tubes effectively absorbs heat by evaporation at the warm air stream end of the tube, there is not proper slope from the cold end don to the warm end.
a. heat wheel system
b. runaround coil system
c. heat storage tank system
d. heat pipe system
d. heat pipe system.
