Table 2 Differences between central power plants and wellhead power plants [2, 56]
From: Central versus wellhead power plants in geothermal grid electricity generation
| Parameters | Central power plant | Wellhead power plant | |
|---|---|---|---|
| 1 | Setup period | Takes more than 2 years to set up | Takes between 3 and 6 months |
| 2 | Customization | Not site specific | Customized to specific site conditions |
| 3 | Number of wells | Fed by multiple steam wells | Normally operate on a single well |
| 4 | Capacity factor | Higher capacity factor | Lower capacity factor |
| 5 | Operating efficiency | Higher efficiency | Lower efficiency |
| 6 | Power evacuation | High voltage | Can use low voltage |
| 7 | Non-condensable gases | Well dependent | Well dependent |
| 8 | Flexibility and portability | Not flexible and not portable | Flexible and portable |
| 9 | Specific steam consumption | Low specific steam consumption | High specific steam consumption |