An aqua-ammonia solution is utilized as the refrigerant within which category of cooling systems_________________?
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Answer: D. absorption
Explanation
An aqua-ammonia solution is the standard working fluid pair used in vapor absorption refrigeration. Water acts as the absorbent while ammonia serves as the refrigerant in this thermal system. Heat energy drives the separation of ammonia vapor from the liquid solution within the generator. Absorption refrigeration cycles replace mechanical compressors with thermal compressor generator absorber assemblies. Ammonia has a high affinity for water at lower temperatures and pressures in the cycle. Waste heat or solar thermal energy can power these environmentally friendly cooling systems directly.
These systems are widely used in large industrial plants where waste heat is readily available. Absorption chillers provide reliable air conditioning in remote locations lacking stable electrical power grids. Using thermal energy inputs reduces electrical peak load demands for commercial building cooling. Compression systems use mechanical work input and synthetic refrigerants rather than chemical absorption. Direct refrigeration describes evaporator placement relative to cooled spaces, not the fluid pairing. Indirect systems use secondary coolants like chilled water to distribute cooling throughout buildings.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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