determine the amount of energy that will used for space heating in the United States
provide comparisons between hot water and HDR energy sources in United States
revise the estimates on the extent of remaining coal resources in the United States
estimate the total HDR resource base in the United States
24. It can be inferred from the passage that the availability of temperature-depth records for any specific area in the United States depends primarily on the
possibility that HDR s may be found in that area
existence of previous attempts to obtain oil or gas in that area
history of successful hot water or steam recovery efforts in that area
failure of inhabitants to conserve oil gas reserves in that area
use of coal as a substitute for oil or gas in that area
25. According to the passage, in all HDR recovery systems fluid will be necessary in order to allow
sufficient permeability
artificial stimulation
drilling of holes
construction of reservoirs
transfer of heat
26. According to the passage, if the average geothermal gradient in an area is 22℃ per kilometer of depth, which of the following can be reliably predicted?
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