Read the passage: 'District heating networks in Nordic cities capture surplus thermal energy from data centers and industrial plants, piping hot water through insulated subterranean pipes to heat residential blocks.' What principle underpins this system?
Answer and explanation
Correct answer: B. Utilising industrial waste heat to heat urban homes
- Step 1: The text explains that waste thermal energy from industrial sources is captured and redistributed for residential heating. Step 2. Select the option highlighting the utilization of industrial waste heat. Answer: Utilising industrial waste heat to heat urban homes. Why not the others: The network avoids relying purely on individual fossil boilers; geothermal geysers are not used in typical Nordic district systems; electrical conversion to steam is not the stated mechanism.
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