| 摘要 |
PROBLEM TO BE SOLVED: To provide negative pressure type geothermal power generating equipment capable of generating high output power even under a shallow depth and in a relative low temperature region, and a negative pressure type geothermal exchanger for use in the negative pressure type geothermal power generating equipment.SOLUTION: A geothermal exchanger 1 has a triple pipe structure comprising a water injection pipe 2 provided in the ground and supplied with water from the ground, a steam taking out pipe 3 arranged inside the water injection pipe 2 and an intermediate pipe 30 provided between the water injection pipe 2 and the steam taking out pipe 3. The steam taking out pipe 3 is provided with a plurality of injection ports 5 at its lower region and the water injection pipe 2 and the steam taking out pipe 3 are kept open through the injection ports 5. Compressed steam descends from an upper part to a lower part of the intermediate pipe 30, and the bottom part of the steam taking out pipe 3 is provided with a compressed steam injection port 31 for injecting compressed steam descended down the intermediate pipe 30 toward the steam taking out pipe 3.SELECTED DRAWING: Figure 1 |
