Read the passage excerpt:
'District cooling systems (DCS) represent an energy-efficient alternative to decentralized air-conditioning units in arid metropolitan environments. A centralized central chiller plant produces chilled water, which is subsequently circulated through insulated subterranean piping networks to supply thermal comfort to multiple commercial and residential complexes. Due to economies of scale and thermal energy storage (TES) capabilities, DCS can reduce cooling electricity consumption by up to 50% compared to conventional split systems.'
How does a district cooling system distribute cooling across an urban neighborhood?
Answer and explanation
Correct answer: A. Circulating chilled water through insulated underground pipe networks from a central plant
- Step 1: The passage details that 'A centralized central chiller plant produces chilled water, which is subsequently circulated through insulated subterranean piping networks to supply thermal comfort...'
- Step 2: Chilled water transported through insulated pipes is the physical transmission mechanism.
Answer
Circulating chilled water through insulated underground pipe networks from a central plant.
Why not the others: 'Pumping compressed ammonia gas directly into individual residential wall units' is a dangerous industrial safety violation not used in district cooling; 'Vaporizing sea mist into open street corridors...' describes outdoor misting, not district cooling; 'Transmitting electromagnetic cooling frequencies...' is scientifically absurd.
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