Table 6 Results of cost–benefit analysis for different carbon tax scenarios.

From: Analytical study of integrating downhole thermoelectric power generation with a coaxial borehole heat exchanger in geothermal wells

Parameters

Carbon Tax(RMB/t CO2)

0

20

200

Annual net income(104RMB)

121.53

123.57

141.81

Rate of return(%)

16.07

16.34

18.75

Static payback period(Year)

6.22

6.12

5.33

Dynamic payback period (Year)

8.02

7.85

6.62

Net present value(104RMB)

559.66

581.67

779.24

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