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68 TRG-TRC011-EN
1 Refrigerant (distilled water) and absorbent (lithium bromide)
2 $ generator, % condenser, & expansion device, ' evaporator, ( absorber,
) heat exchanger
3 Generator and condenser; evaporator and absorber
4 Below atmospheric pressure
5 Condenser and evaporator
6 To preheat the dilute solution returning to the generator, which reduces the
heat energy required to boil the refrigerant, and precool the concentrated
solution returning to the absorber, which reduces the flow rate of cooling
water required to absorb heat in the absorber.
7 High-temperature generator, high-temperature heat exchanger, and
possibly an additional pump (depending on the type of flow cycle used)
8 Direct-fired absorption chiller (with an auxiliary heating bundle)
9 Decrease in vapor pressure
10 The process of lithium bromide leaving the solution as a solid when the
absorbent solution is cooled below its saturation temperature.
11 Air leaking into the chiller, avoided by quality construction and automatic
purging. Cooling water that is too cold or that fluctuates in temperature too
rapidly, avoided by using improved microelectronic controls or a cooling
tower bypass. Electric power failure, avoided by gravity-fed dilution cycles.
12 To determine if corrosion inhibitor and performance additive levels are
within acceptable limits. Air leaking into the chiller can deplete the
corrosion inhibitor.
13 False. Many new chiller and control designs are able to maintain control of
the cycle, even in situations where the cooling-water temperature may be
highly variable.
14 Quantity of combustion air required, venting of combustion exhaust, sizing
of the main gas train, requirements for low NO
x
emissions, and compliance
with ASHRAE Standard 15.
Answers