what is it Absorption Chiller

what is it Absorption Chiller

what is it Absorption Chiller

Outline:

Steam-fired absorption is a good application where there is a low cost of steam such as a cogen or  waste energy plant. Direct-fired natural gas units are used in hybrid and high-cost electricity Outline areas. Absorption chillers do NOT use a CFC or HCFC refrigerant; therefore, some users purchase absorption chillers for this environmental advantage.

Principle and Mechanism:

Principle It seems unreasonable to burn a flame to produce cooling, but that is what happens inside an absorption & chiller. The refrigerant used is actually water, as that is the working medium that experiences a phase Mechanism change that causes the cooling affect. The second fluid that drives the process is a   salt, generally lithium bromide. Heat is used to separate the two fluids; when they are brought back together in a near  vacuumenvironment, the water experiences a phase change to remix with the salt at a very low temperature (at normal atmosphere pressure, water vaporizes at 212F; in an absorber, water vaporizes cold enough
to produce 46F chilled water).

Description Structure explanation, shapes, and/or System diagram:

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Absorption chillers cost more to operate than electric chillers. They also cost about twice as much to purchase. Therefore, a reason other than average electric cost is needed to justify a
base-loaded absorption system. Economics are more favorable for hybrid systems. Hybrid systems combine absorption chillers for use during on-peak electric hours and electric chillers for base load  operation. 

Energy Saving effect :

is expected to be 50 percent more efficient than conventional chillers.

fecteffect effect 

Economics equipmen Cost:

 The cost of the equipment selection depending upon several factors including:
Equitment building type, equipment, climate, utility rate, and scalar ratio. Remark:

 Absorbers have a Coefficient of Performance (COP) that is about 1.0, compared to engine driven
compressors about 1.5 and electric at about 3.0.


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