Question

What hygroscopic property means in practice?

Select one:

a. Material property to bind moisture and release it out.

b. Material property to prevent air flows.

c. Material property to insulate.

What is the main parameter to get the best efficiency out from the heat pump?

Select one:

d. Low input temperature of the heat pump.

e. High output temperature of the heat pump.

f. Low temperature difference between input and output of the heat pump.

Floors can be kept as heat storage. Calculate how much energy (kWh) per one Celsius degree can be stored to a concrete floor if its thickness is 10 cm and area 100 m².

Select one:

g. 50–60 kWh/°C

h. 0.5–0.6 kWh/°C

i. 5–6 kWh/°C

Answer 1

Q.1. What hygroscopic property means in practice?

   Ans: Material property to bind moisture and release it out.

Q.2. What is the main parameter to get the best efficiency out from the heat pump?

Ans: Low temperature difference between input and output of the heat pump.

Q.3. Floors can be kept as heat storage. Calculate how much energy (kWh) per one Celsius degree can be stored to a concrete floor if its thickness is 10 cm and area 100 m2.

Ans: 5-6 kW/C (Calculation steps are attatching as an image)