Reduction of thermal resistance of ground heat exchangers using large grain size materials

Transactions - Geothermal Resources Council

Volumn 35 2, Issue , 2011, Pages 1095-1100

  Fujii, Hikari ^a   Komaniwa, Yoshihito ^a   Nomoto, Takuya ^a   Chou, Naokatsu ^b  

^a KYUSHU UNIVERSITY   (Japan)

^b KYUSHU ELECTRIC POWER CO INC   (Japan)

Author keywords

Geothermal; Ground heat exchanger; Ground source heat pump; Grouting material; Natural convection; Thermal resistance

Indexed keywords

ANNULAR SPACE; FILLING MATERIALS; GEOTHERMAL; GRAIN SIZE; GROUND HEAT EXCHANGERS; GROUTING MATERIALS; LABORATORY EXPERIMENTS; LABORATORY TEST; LARGE-GRAIN; RAYLEIGH NUMBER; SAND LAYER; SMALL GRAIN SIZE; THERMAL RESPONSE TEST;

CONCRETE CONSTRUCTION; EXPERIMENTS; FILLING; GEOTHERMAL FIELDS; GEOTHERMAL HEAT PUMPS; GEOTHERMAL PROSPECTING; GRAIN SIZE AND SHAPE; GROUNDWATER; HEAT PUMP SYSTEMS; HEAT RESISTANCE; MORTAR; NATURAL CONVECTION; SILICA SAND; TUBES (COMPONENTS);

GRAVEL;

EID: 84860848172     PISSN: 01935933     EISSN: None     Source Type: Conference Proceeding    
DOI: None     Document Type: Conference Paper

References (4)

1. Allan, M. L. and S.P. Kavanaugh, 1999, "Thermal Conductivity of cementitious grouts and impact on heat exchangers length design for ground source heat pumps", HVAC&R Research, vol. 5, pp. 85-96.
2. Fujii, H., T. Ishikami and K. Ohshima, 2004, "Improvement of thermal properties in grouting materials of heat exchange wells in ground-couples heat pump systems", J. Mining and Materials Processing Institute of Japan (in Japanese with English abstract), vol. 119, pp. 403-409.
3. Okubo, H., H. Fujii and R. Itoi, 2006, "Experimental study on thermal resistance of vertical ground heat exchangers", GRC Transactions, vol. 30, pp. 559-563.
4. Vukovis, M. and Sore, A., 1992, "Determination of hydraulic conductivity of porous media from grain-size composition", Water Resources Publications, 83p.