An Experiment to Prove the Concept of the Downhole Coaxial Heat Exchanger (DCHE) in Hawaii
- Key words
- Hawaii; Moderate Temperature; Coaxial; PICHTR; ENAA; In Situ Heat Transfer; Thermal Conductivity; Downhole Heat Exchanger
- Location
- Puna, Hawaii
- Conference
- Geothermal Resources Council Transactions
- Year
- 1992
- Session
- Direct use; Downhole heat exchangers; Equipment design
- Language
- English
Abstract
The first experiment for the Downhole Coaxial Heat Exchanger (DCHE) was carried out successfully at the HGP-A well on the island of Hawaii using an interval from the surface down to a depth of 876.5m. The temperature at the bottom of the DCHE before the onset of the experiment was 110°C. The observed highest hot water temperature during the experiment was 98°C and the maximum gross and net thermal outputs were 540 kW and 370 kW, respectively. The experiment proceeded smoothly and excellent agreement between measured values and computed values was obtained in the analysis (Morita et al, 1992). Thus, the concept of DCHE was proved to be sound.
Copyright 1992, Geothermal Resources Council. Readers who download papers from this site should honour the copyright of the original authors, and may not copy or distribute the work further without the permission of the original publisher.