An ammonia-absorption refrigeration cycle requires an external input of__________________?
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Answer: A. very little work input
Explanation
Ammonia absorption systems require very little mechanical work input from a pump. Thermal energy input replaces the large mechanical compressor in vapor compression cycles. Pumping liquid solution requires minimal electrical power compared to vapor compression. Ammonia absorption refrigeration utilizes heat energy from steam, gas, or solar sources. Ammonia acts as the refrigerant while water serves as the absorbent liquid. The generator uses thermal heat to drive ammonia vapor out of the strong solution.
Industrial facilities with waste heat sources use absorption refrigeration to save electricity. Large commercial buildings apply absorption chillers to reduce peak electrical demand charges. Off-grid refrigeration systems utilize thermal heat sources where electricity is unavailable. Maximum work input describes vapor compression systems using large mechanical compressors. Nearly same work input is false because absorption cycles use thermal energy instead. Zero work input is incorrect because solution pumps require a small amount of work.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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