Engineering & Materials Science
Boreholes
100%
Thermal energy
86%
Rocks
38%
Crystalline rocks
38%
Solar energy
35%
Heat exchangers
26%
Granite
21%
Numerical models
20%
Tunnels
20%
Energy storage
18%
Heating
17%
Hot Temperature
17%
Tubes (components)
16%
Experiments
15%
Solar heating
12%
Incident solar radiation
12%
Heat storage
11%
Thermal conductivity
10%
Soils
10%
Gas emissions
9%
Greenhouse gases
9%
Temperature distribution
7%
Water
6%
Hydrology
6%
Geology
5%
Sun
5%
Pipe
5%
Space heating
5%
Earth & Environmental Sciences
energy storage
81%
borehole
52%
heat storage
44%
solar energy
33%
energy
33%
heating
28%
hard rock
24%
winter
21%
tunnel
19%
modeling
17%
insolation
17%
rock
16%
aquifer
15%
demand
15%
solar heating
14%
greenhouse gas emissions
11%
prediction
10%
ground conditions
10%
district heating plant
9%
fracture mechanics
8%
experiment
8%
rock mechanics
8%
in situ
7%
summer
7%
surplus
7%
method
7%
speed
6%
bedrock
6%
sensitivity analysis
6%
calculation
5%
code
5%
Physics & Astronomy
boreholes
53%
heat storage
46%
solar energy
30%
polar regions
24%
energy storage
23%
thermal energy
22%
rocks
20%
winter
20%
tunnels
20%
tube heat exchangers
16%
manometers
15%
predictions
11%
heating
10%
climate change
8%
solar heating
8%
insolation
8%
Finland
7%
greenhouses
7%
heat
7%
summer
6%
heat exchangers
6%
layouts
5%
conductive heat transfer
5%