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Shallow ground water temperature map |
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 Coon's Cave Monroe County |
Cave
temperature = shallow ground water temperature Casual proof: As former caver or spelunker, I observed year-round underground temps. Once past the entrance, caves remain same temp year-round. Caves get temperature from average underground temperature in region. For example, limestone caves in Indiana are 54°F year-round, summer or winter. Southern caves are warmer. The map shows same temps I saw inside caves. For cave info: http://en.wikipedia.org/wiki/Caving see links at bottom For research: Use 'google alert' in e-mail: http://www.google.com/alerts For data, search US Geological Survey: http://www.usgs.gov/ |
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Four
ways to look at underground temperature. 1) All underground water pipes are geothermally heated. Each house receives some measure of geothermally heated water. Incoming cold water causes water heater to run more. See chart 2) Shallow temps start at 8-12 feet deep. 3) Deep underground, up to 5 miles in some diamond mines. read1 read2 4) Geothermal hot spots from volcanic activity cause extremely high temps near surface. Geothermal ideas 1 2 3 4 5 6 7 Geothermal self-help forum |
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Underground water pipes are geothermally heated Water arriving at home is geothermally heated. Water pipes are buried underground to prevent frozen pipes. Passively pre-heat cold water using staging tank or tempering tank located in naturally warm area See illustrations |
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Geothermal
heat forum Forum on fireplaces, stoves & chimneys |
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Indirect water
heater stores geothermal heat See new water heater ideas |
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Family chart for setting water heater timer based on incoming water temperature | ||
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Do-it-yourself
water heater repairs and timer |
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