Research Output 1983 2019

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Conference article
2007
2 Citations (Scopus)

Interpretation of thermal response tests in the presence of groundwater flow

Fujii, H., Okubo, H. & Itoi, R., Dec 1 2007, In : Transactions - Geothermal Resources Council. 31, p. 465-470 6 p.

Research output: Contribution to journalConference article

Groundwater flow
ground water
groundwater flow
thermal conductivity
Groundwater
2005

Field experiment of pH adjustment for acid geothermal fluids in Miravalles, Costa Rica

Iwanaga, T., Watanabe, E., Hirowatari, K., Yamauchi, M., Itoi, R., Eddy, S. R. & Alejandro, R. B., Dec 1 2005, In : Transactions - Geothermal Resources Council. 29, p. 693-695 3 p.

Research output: Contribution to journalConference article

Costa Rica
Deposition rates
Corrosion rate
adjusting
acids
2004
16 Citations (Scopus)

Improvements on analytical modeling for vertical U-tube ground heat exchangers

Fujii, H., Itoi, R. & Ishikami, T., Dec 1 2004, In : Transactions - Geothermal Resources Council. 28, p. 73-77 5 p.

Research output: Contribution to journalConference article

Heat exchangers
Heat pump systems
Thermal load
prediction
modeling
1 Citation (Scopus)

Numerical simulation of large-scale GCHP systems in the presence of groundwater flow

Fuji, H., Itoi, R., Fujii, J., Uchida, Y. & Ishikami, T., Dec 1 2004, In : Transactions - Geothermal Resources Council. 28, p. 79-84 6 p.

Research output: Contribution to journalConference article

heat pumps
Heat pump systems
Groundwater flow
ground water
groundwater flow
2003
1 Citation (Scopus)

Lumped parameter model analysis for estimating fractions of reinjected water return to produced fluid at Sumikawa, Japan

Itoi, R., Matsuzaki, R., Tanaka, T. & Kamei, J., Dec 1 2003, In : Transactions - Geothermal Resources Council. 27, p. 387-391 5 p.

Research output: Contribution to journalConference article

Fluids
fluid
Water
well
water
1992

Interference test analysis method using the Kalman filtering and its application to the takigami geothermal field, Japan

Itoi, R., Fukuda, M., Jinno, K. & Gotoh, H., Dec 1 1992, In : Transactions - Geothermal Resources Council. 16, p. 657-662 6 p.

Research output: Contribution to journalConference article

Geothermal fields
transmissivity
Kalman filter
Kalman filters
Parameter estimation
1988
2 Citations (Scopus)

Geothermal reservoir simulation for a complex model

Fukuda, M., Itoi, R. & Koga, A., Dec 1 1988, In : Transactions - Geothermal Resources Council. 12, p. 457-460 4 p.

Research output: Contribution to journalConference article

Aquifers
simulation
Water
Compressibility
Pressure drop