Fundamental Stuff Flashcards
Energy Resource
basic source of primary energy
examples: coal, oil, wind
Energy Currency
energy has been processed.
in a format to provide a service
examples: electricity, gasoline
Energy Service
final end-use purpose of energy
the work that energy gets done
examples: lighting, heating, transportation
Energy Systems
primary energy –> energy conversion –> energy currency –> end-use tech –> useful energy –> service rendered
examples: coal–>powerstation–>electricity–>lamp–>radiant energy–>illumination
Resource Base
best estimate of all resource in existence
not concerned with tech/econ feasibility
Reserves
Estimate of amount feasible to extract on a tech and econ basis
Proved Reserves
known-to-exist. also feasible at todays prices and w/technology
some drilling/production data
Power vs Energy
Power is energy/time. Energy is energy
kW, J/s versus kWh, J
Capacity Factor
measure of utilization; 100% * (energy produced/maximum producible)
Heat Rate
ratio of useful energy in to useful energy out
usually in Btu/kWh
Efficiency
reciprocal of heat rate, unitless;
(3412 Btu/kWh)/(heat rate) * 100%
Load Factor
demand side equivalent of capacity factor;
energy consumed/ energy at peak demand;
avg power demand/ peak power demand
World energy supply
Oil (33), Coal (30), NG (24), Hydro (6.4), Nuke (4.9), Renew (1.6)
World electricity
Coal (41), NG(22), Hydro (16), Nuke (12), Renew (3), Oil (5)
US Energy Consumption
Oil (36), NG (26), Coal (20), Nuke (9), Renew (6), Hydro (3)
