Heating Demand

Question 1

How is the heat supplied to rooms controlled in a conventional Swedish building
heating system (like Undervisningshuset)? Multiple options may be correct.
o By modulating the hot water supply temperature based on the room
temperature.
o By modulating the hot water supply temperature based on the outdoor air
temperature.
o By modulating the hot water supply temperature based on the solar radiation.
o By modulating the supply water flow rate based on the room temperature.
o By modulating the supply water flow rate based on the outdoor air
temperature.
o By modulating the supply water flow rate based on the solar radiation

Answer 1

By modulating the hot water supply temperature based on the outdoor air temperature.

By modulating the supply water flow rate based on the room temperature.

Question 2

What building component is responsible for a major part of the heat transmission
losses in a modern Swedish building?

Answer 2

Windows, due to thermal bridging, large surface area, low insulation values and air leakage.

Question 3

What is an “Unmet load hour”?

Answer 3

The hours in a year that the HVAC system serving a space cannot maintain space set point values.

Question 4

In larger Swedish buildings district heat is supplied even during the summer. What is
the reason?

Answer 4

The continuous supply of district heat during summer in larger Swedish buildings is driven by the need for domestic hot water, occasional space heating in specific areas, support for industrial and commercial processes, the efficiency and stability of the district heating system, and the integration of renewable energy sources