Earth & Environmental Sciences
combined heat and power
100%
hot water
77%
fuel cell
77%
heater
60%
oxide
51%
economics
40%
economic analysis
39%
gas
35%
combustion
26%
water demand
17%
gas production
17%
savings
17%
census
16%
stack
15%
replacement
14%
heating
12%
oxidation
11%
water
10%
cost
9%
energy
8%
effect
4%
Engineering & Materials Science
Solid oxide fuel cells (SOFC)
74%
Water heaters
55%
Economics
44%
Gases
39%
Water
37%
Hot Temperature
33%
Economic analysis
30%
Synthesis gas
17%
Reforming reactions
15%
Thermal energy
13%
Hybrid systems
13%
Oxidation
12%
Characterization (materials science)
12%
Heating
9%
Electric potential
7%
Costs
5%
Social Sciences
heat
77%
water
54%
economics
29%
efficiency
19%
heat pump
17%
equivalence
14%
savings
14%
census
11%
utilization
11%
demand
9%
energy
9%
costs
7%