収録問題のプレビュー

Low-Temperature District Heating District heating distributes thermal energy from a central source to several buildings through insulated pipes. Traditional systems often use very hot water, which loses heat as it travels. Newer low-temperature networks operate with cooler water. They can draw on sources that would otherwise be wasted, such as heat from industrial processes or large data centres. However, older buildings may need better insulation or larger radiators to maintain indoor comfort with cooler water. Supporters

What is the main advantage of cooler-water heating networks mentioned in the passage?

• A. They guarantee lower upfront installation costs.
• B. They never require insulation.
• C. They can use some sources of otherwise wasted heat.
• D. They eliminate all heat loss during transport.