Why the second year has higher fluid temperature and generated more power? #223
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I have run some test, and found that some time the second year has higher fluid temperature and generated more power, could you please give some guidance about this phenomenon? |
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@HuihuiYangshell Could you give an example input file that demonstrates this? |
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@HuihuiYangshell, yes this situation can occur if your wellbore heat loses are initially significant but then decrease over time while your reservoir output temperature stays constant or only slightly declines. The higher electricity output is a direct result of the higher production temperature. The production temperature is calculated as reservoir output - wellbore temperature decline. The reservoir temperature in this example is calculated with the Gringarten model for an EGS type reservoir and it looks like you have a very large heat transfer area resulting is negligible reservoir temperature decline. On the other hand, your wellbore loses are calculated with Ramey's model estimating several degrees of temperature decline initially, slowly diminishing over time. The net effect is a slowly increasing wellhead temperature. If you want a scenario without this effect, you can either decrease your reservoir heat transfer area to enforce a larger reservoir temperature decline or remove Ramey's wellbore model and specify a constant wellbore temperature drop. |
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@HuihuiYangshell, yes this situation can occur if your wellbore heat loses are initially significant but then decrease over time while your reservoir output temperature stays constant or only slightly declines.
The higher electricity output is a direct result of the higher production temperature. The production temperature is calculated as reservoir output - wellbore temperature decline. The reservoir temperature in this example is calculated with the Gringarten model for an EGS type reservoir and it looks like you have a very large heat transfer area resulting is negligible reservoir temperature decline. On the other hand, your wellbore loses are calculated with Ramey's model estimating …