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ECADEMY test

5 - High efficiency hydronic systems

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Correct
01.
Q: When is zoning an advantage?
A: When a building has different requirements to temperature or when the internal load from occupants is different.
Correct
02.
Q: Hydronic systems take up much less space than forced air systems in a building. Why is that?
A: Because hydronic systems use water as the cooling media, and water can carry more energy than air. That means smaller systems are needed to transport the same amount of energy.
Correct
03.
Q: Why is a mixing loop the best way to control a radiant system?
A: Because flow rate and temperature can be adjusted according to the desired performance of the radiant surface
Correct
04.
Q: What influence does the introduction of radiant cooling systems have on other building services?
A: Air volumes, air handlers and air ducts can be reduced in size because radiant cooling systems take care of the sensible heat loads and a dedicated outdoor air systems can be introduced (DOAS).
Correct
05.
Q: How does radiant cooling in a room work?
A: A radiant ceiling or floor is a low temperature surface, which receives more heat radiation than it emits and thereby removes sensible heat loads. A radiant ceiling also absorbs heat by convection.
Correct
06.
Q: What effect does the introduction of radiant cooling systems have on the chilled water production?
A: With radiant cooling systems it is increasingly feasible to utilise sustainable chilled water sources for free cooling because the chilled water temperature is up to approx. 8 - 10 °C higher than with traditional systems.