Research Article
Determination and Application of Comprehensive Specific Frictional Resistance in Heating Engineering
Table 3
Comparison table of economic effect evaluation indexes.
| Schemes
Index | Payback Period
(years) | Net Present Value
(10000) | Rate of Return on Investment
(%) | Internal Rate of Return
(%) | Present Value Cost
(10000) | Initial Investment
(10000) |
| Scheme one
(Comprehensive specific frictional resistance) | 11.39 | 40872.73 | 39.13 | 11.7 | 32116.94 | 104463.1 |
| Scheme two
(Economic specific frictional resistance) | 12.04 | 37460.97 | 34.15 | 11.1 | 34477.33 | 109679.8 |
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