trevorjohnson83
Gold Member
- Nov 24, 2015
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So the surface temperature of 90 degrees on a hot day, what would be the temperature at ten feet below the earth? does anyone know how to use two temperature gradients to make electricity?
how deep is the average drill hole for a geothermal plant?
These are usually located in volcanic or tectonically active regions.
These use shallower wells to tap into warm water.
Not the same as geothermal electricity production, but often confused.
Let me know if you're asking about residential geothermal, electric power generation, or something in between.
Let me know your general location if you want a more precise estimate.
ChatGPT said:
On a hot day with a surface temperature of 90°F (32°C), the temperature just 10 feet below the surface is significantly more stable and largely unaffected by daily weather variations.Approximate Temperature at 10 Feet Depth:
- Typically around 50°F to 60°F (10°C to 16°C) in temperate regions.
- The exact temperature depends on your location (latitude and climate), soil type, and seasonal averages rather than the current surface temperature.
Why It Stays Cooler:
- Thermal inertia: Soil and rock conduct heat very slowly.
- Thermal lag: The deeper you go, the longer it takes for surface heat to penetrate.
- At 10 feet, daily and even weekly temperature changes barely register.
how deep is the average drill hole for a geothermal plant?
ChatGPT said:
The depth of a typical drill hole for a geothermal power plant depends heavily on the type of geothermal system being used:
These are usually located in volcanic or tectonically active regions.- Depth:
- Typically 1,500 to 10,000 feet (≈ 500 to 3,000 meters)
- Some wells go as deep as 15,000 feet (≈ 4,500 meters) if needed to reach high-temperature reservoirs.
- Target temperatures: Usually 300°F to 700°F (150°C to 370°C)
These use shallower wells to tap into warm water.- Depth: Often hundreds to 2,000 feet (≈ 100 to 600 meters)
Not the same as geothermal electricity production, but often confused.- Depth:
- Vertical loops: 150 to 500 feet (≈ 45 to 150 meters) per borehole
- Horizontal loops: only 6 to 10 feet deep (≈ 2 to 3 meters)
Let me know if you're asking about residential geothermal, electric power generation, or something in between.
Let me know your general location if you want a more precise estimate.