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Heat RecoveryDistribution of the heat produced by a compressor
1. Air filter
2. Automatic intake valve
3. Oil chamber
4. Compression chamber
5. Oil filter
6. Rotor |
7. Blades
8. Coalescing separator
9. Air oil cooler (radiator)
10. Condensate drain
11. Heat recovery
12. Valve |
| Thermal equivalent |
1 lt heating diesel oil 10,6 kWh |
1 m³ of heating methane 9,59 kWh |
| Boiler efficiency |
85% |
85% |
| Fuel price |
€ 0,56 |
€ 0,435 |
| Cost of each kWh in heat |
€ 0,062 |
€ 0,053 |
| 2000 hours for year |
€ 9,263 |
€ 7,918 |
| 4000 hours for year |
€ 18,526 |
€ 15,836 |
| 6000 hours for year |
€ 27,788 |
€ 23,755 |
Evaluation of plant with a 45 kW Compressor and 2000 operating hours for 5 years
Pay back calculated on 2000 operating hours for year
| Compressor absorbed power (kW) |
Heat recovery system/investiment € |
Heat recovery 2000 hours for year |
Pay Back Anni Years |
| 15 |
2.051 |
1.320 |
1,55 |
| 15,5 |
2.051 |
1.628 |
1,26 |
| 22 |
2.051 |
1.936 |
1,06 |
| 30 |
4.308 |
2.639 |
1,63 |
| 37 |
4.308 |
3.255 |
1,32 |
| 45 |
4.308 |
3.959 |
1,09 |
| 55 |
7.179 |
4.839 |
1,48 |
| 75 |
7.179 |
6.599 |
1,09 |
| 90 |
7.179 |
7.918 |
0,91 |
| 110 |
8.974 |
9.678 |
0,93 |
Pay back calculated on 4000 operating hours for year
| Compressor absorbed power (kW) |
Heat recovery system/investiment € |
Heat recovery 4000 hours for year |
Pay Back Anni Years |
| 15 | 2.051 | 2.639 | 0,78 |
| 15,5 | 2.051 | 3.255 | 0,63 |
| 22 | 2.051 | 3.871 | 0,53 |
| 30 | 4.308 | 5.279 | 0,82 |
| 37 | 4.308 | 6.511 | 0,66 |
| 45 | 4.308 | 7.918 | 0,54 |
| 55 | 7.179 | 9.678 | 0,74 |
| 75 | 7.179 | 13.197 | 0,54 |
| 90 | 7.179 | 15.836 | 0,45 |
| 110 | 8.974 | 19.356 | 0,46 |
Pay back calculated on 6000 operating hours for year
| Compressor absorbed power (kW) |
Heat recovery system/investiment € |
Heat recovery 6000 hours for year |
Pay Back Anni Years |
| 15 | 2.051 | 3.959 | 0,52 |
| 15,5 | 2.051 | 4.883 | 0,42 |
| 22 | 2.051 | 5.807 | 0,35 |
| 30 | 4.308 | 7.918 | 0,54 |
| 37 | 4.308 | 9.766 | 0,44 |
| 45 | 4.308 | 11.877 | 0,36 |
| 55 | 7.179 | 14.517 | 0,49 |
| 75 | 7.179 | 19.796 | 0,36 |
| 90 | 7.179 | 23.755 | 0,30 |
| 110 | 8.974 | 29.033 | 0,31 |
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