1
When is zoning an advantage?
2
Hydronic systems take up much less space than forced air systems in a building. Why is that?
3
Why is a mixing loop the best way to control a radiant system?
4
What influence does the introduction of radiant cooling systems have on other building services?
5
How does radiant cooling in a room work?
6
What effect does the introduction of radiant cooling systems have on the chilled water production?
Test results
Congratulations. You have passed the test and completed the 5 - High efficiency hydronic systems
Achieved badges:
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.
01.
Q: When is zoning an advantage?
A: When a building is more than 1000 m2
01.
Q: When is zoning an advantage?
A: When a building has more than three floors
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.
02.
Q: Hydronic systems take up much less space than forced air systems in a building. Why is that?
A: Because the water velocity in hydronic systems are higher than the velocity in ducts with air and hence much smaller pipes are used.
02.
Q: Hydronic systems take up much less space than forced air systems in a building. Why is that?
A: Because when using hydronic systems such as chilled ceilings and floors, there is no need for ventilation.
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
03.
Q: Why is a mixing loop the best way to control a radiant system?
A: Mixing loops allow for constant flow on both the primary and secondary side, which ensures reduced pumping costs
03.
Q: Why is a mixing loop the best way to control a radiant system?
A: Because temperature is quickly and accurately adjusted in the radiant surface
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).
04.
Q: What influence does the introduction of radiant cooling systems have on other building services?
A: Air handlers will still need the usual air recirculation functionality because the need for outdoor air is left unaffected.
04.
Q: What influence does the introduction of radiant cooling systems have on other building services?
A: Since the radiant system takes care of the total cooling load, cooling coils in air handlers can be left out.
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.
05.
Q: How does radiant cooling in a room work?
A: A radiant ceiling or floor takes care of sensible and latent heat loads by absorbing heat in form of radiation as well as convection.
05.
Q: How does radiant cooling in a room work?
A: Radiant ceilings or floors works both by radiation and convection and they take care of sensible as well as latent heat loads
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.
06.
Q: What effect does the introduction of radiant cooling systems have on the chilled water production?
A: Radiant cooling systems require more or less the same chilled water temperature as traditional systems, which means the use of sustainable sources are at the same level.
06.
Q: What effect does the introduction of radiant cooling systems have on the chilled water production?
A: Production of chilled water from sustainable sources such as cold ground water or water from rivers and lakes is not feasible due to high initial investment and long distribution pipes.