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Table 1 Coefficients of the Eq. (10) for three interval case production side

From: Numerical analysis of downhole heat exchanger designed for geothermal energy production

Node A B C
1 a 1 + Dr1 R perf1 + b 1 F 1(Q tot − Q 3 − Q 2)2 + F 2(Q tot − Q 3)2 + F 3(Q tot)2 + Ac2 Q 2 + Ac3 Q 3 + Dr2 Q 22  + Dr3 Q 23  − 3G − (P e − P well(3))
2 a 2 + Dr2 R perf2 + b 2 + Ac2 F 2(Q tot − Q 3)2 + F 3(Q tot)2 + Ac 3 Q 3 + Dr 3 Q 23  − (P e  − P well(3)) − 2G
3 a 3 + Dr3 R perf3 + b 3 + Ac3 F 3(Q tot)2 − (P e  − P well(3)) − G