Guidelines and the design approach for vertical geothermal heat pump systems: Current status and perspective

Canadian Geotechnical Journal

Volumn 51, Issue 6, 2014, Pages 647-662

  Dehkordi, S E ^a   Schincariol, R A ^a  

^a UNIVERSITY OF WESTERN ONTARIO   (Canada)

Author keywords

Earth energy systems; Groundwater; Legislation; Regulation; Standard

Indexed keywords

ENERGY EFFICIENCY; GEOTHERMAL FIELDS; GEOTHERMAL HEAT PUMPS; GROUNDWATER; LAWS AND LEGISLATION; STANDARDS; SUSTAINABLE DEVELOPMENT;

DESIGN CONSIDERATIONS; ENERGY SYSTEMS; GEOTHERMAL SYSTEMS; GROUNDWATER ADVECTIONS; REGULATION; REGULATORY ENVIRONMENT; REGULATORY FRAMEWORKS; SUSTAINABLE GROWTH;

DESIGN;

DESIGN; ENERGY EFFICIENCY; GEOTHERMAL ENERGY; GEOTHERMAL SYSTEM; GROUNDWATER; PUMP; REGULATORY FRAMEWORK; SUSTAINABILITY;

CANADA;

EID: 84901811694     PISSN: 00083674     EISSN: 12086010     Source Type: Journal    
DOI: 10.1139/cgj-2012-0205     Document Type: Review

References (152)

1. Acuña, J., and Palm, B. 2009. Local conduction heat transfer in U-pipe borehole heat exchangers. In Proceedings of the COMSOL Conference, Milan, Italy, 14-16 October 2009.
2. AFNOR. 2007a. FD X10-980: Forage d'eau et de géothermie-Réalisation, suivi et abandon d'ouvrage de captage ou de surveillance des eaux souterraines réalisés par forages-Démarches administrative [Drilling of water and geothermal-Design, monitoring and abandonment of abstraction and groundwater monitoring by drilling-Administrative procedures]. Association Française de Normalisation (AFNOR). Available from http://www.boutique.afnor.org/ norme/fd-x10-980/forage-d-eau-et-de-geothermie-realisation-suivi-etabandon-d-ouvrage-de-captage-ou-de-surveillance-des-eaux-souterrainesreal/ article/624217/fa152391 [cited 20 February 2013].
3. AFNOR. 2007b. NF X10-999: Forage d'eau et de géothermie-Réalisation, suivi et abandon d'ouvrage de captage ou de surveillance des eaux souterraines réalisés par forages [Drilling of water and geothermal-Design, monitoring and abandonment of abstraction and ground water monitoring by drilling]. Association Française de Normalisation (AFNOR). Available from http:// www.boutique.afnor.org/norme/nf-x10-999/forage-d-eau-et-de-geothermierealisation-suivi-et-abandon-d-ouvrage-de-captage-ou-de-surveillance-deseaux-souterraines-real/article/767164/fa142540 [cited 29 March 2013].
4. AFNOR. 2011. NF X10-970: Forage d'eau et de géothermie-Sonde géothermique verticale (échangeur géothermique vertical en U avec liquide caloporteur en circuit fermé)-Réalisation, mise en oeuvre, entretien, abandon [Drilling of water and geothermal-Geothermal probe vertically (vertical ground heat exchanger with U-shaped coolant in a closed circuit)-Design, implementation, maintenance, abandonment]. Association Française de Normalisation (AFNOR). Available from http://www.boutique.afnor.org/norme/nf-x10-970/ forage-d-eau-et-de-geothermie-sonde-geothermique-verticale-echangeur-geothermique-vertical-en-u-avec-liquide-caloporteur-en-c/article/707827/ fa170147 [cited 29 March 2013].
5. Al-Khoury, R., Bonnier, P.G., and Brinkgreve, R.B.J. 2005. Efficient finite element formulation for geothermal heating systems. Part I: Steady state. International Journal for Numerical Methods in Engineering, 63(7): 988-1013. doi: 10.1002/nme.1313.
6. Allen, J.R. 1920. Heat losses from direct radiation. ASHVE Transactions, 26(11): 455-469, 588-596.
7. Anderson, M.P. 2005. Heat as a ground water tracer. Ground Water, 43(6): 951-968. doi:10.1111/j.1745-6584.2005.00052.x. PMID:16324018.
8. Andersson, O. 2007. Aquifer Thermal Energy Storage (ATES). In Thermal energy storage for sustainable energy consumption fundamentals, case studies and design. Edited by H. Ö. Paksoy. Springer, the Netherlands. pp. 155-176. doi:10. 1007/978-1-4020-5290-3_8.
9. Andrews, C.B. 1978. The impact of the use of heat pumps on ground-water temperatures. Ground Water, 16(6): 437-443. doi:10.1111/j.1745-6584.1978. tb03259.x.
10. ASHRAE. 2007. HVAC applications. Chapter A32. Geothermal energy. In ASHRAE handbook. American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE).
11. ASI. 1998. ÖNORM M 7755-1:2000-09 Elektrisch angetriebene Wärmepumpen; Allgemeine Anforderungen bei Planung und Errich-tung von Wärmepumpen-Heizungsanlagen (Electrically driven heat pumps; General requirements for planning and installation of heating systems with heat pumps). Austrian Standards Institute (ASI) [formerly Österreichisches Normungsinstitut]. Available from http://www.bdb.at/Service/NormenDetail? id=61843 [cited 20 February 2013].
12. ASI. 2000. ÖNORM M 7755-2:2000-09 Elektrisch angetriebene Wärmepumpen; Besondere Anforderungen an Wärmepumpenanlagen bei Nutzung von Grundwasser, Oberflächenwasser oder Erdreich (Electrically driven heat pumps; Special requirements for heat pump systems using groundwater, surface water or soil). Austrian Standards Institute (ASI) [formerly Österreichisches Normungsinstitut]. Available from http://www.bdb.at/Service/ NormenDetail?id=81251 [cited 20 February 2013].
13. Austin, W.A., Yavuzturk, C., and Spitler, J.D. 2000. Development of an in-situ system for measuring ground thermal properties. ASHRAE Transactions, 106(1): 365-379.
14. AWP. 2007a. AWP T1: Wärmepumpenheizungsanlagen mit Erdwärmesonden [Heat pump heating system with geothermal energy sampling probe]. Arbeitsgemeinschaft
15. Wärmepumpen, 2007. Available from http://www.pac.ch/ dateien/T1_Warmepumpenheizungsanlage_mit_Erdwarmesonden.pdf [cited 20 February 2013].
16. AWP. 2007b. AWP T2: Wärmepumpenheizungsanlage mit horizontalen Erdkollektoren, Erdwärmekörben und Kompaktkollektoren [Heat pump heating system with horizontal ground collectors, geothermal baskets and compact collectors]. Arbeitsgemeinschaft Wärmepumpen (AWP). Available from http://www.pac.ch/dateien/T2_Warmepumpenheizungsanlage_mit_ horizontalen.pdf [cited 20 February 2013].
17. AWP. 2007c. AWP T3: Wärmequellennutzung Grundwasser [Use of groundwater source heat]. Arbeitsgemeinschaft Wärmepumpen (AWP). Available from http://www.pac.ch/dateien/T3_Warmequellennutzung_Grundwasser.pdf [cited 20 February 2013].
18. AWP. 2007d. AWP T4: Wärmequellennutzung Oberflächenwasser [Using surface water heat source]. Arbeitsgemeinschaft Wärmepumpen (AWP). Available from http://www.pac.ch/dateien/T4_Warmequellennutzung_ Oberflachenwasser.pdf [cited 20 February 2013].
19. AWP. 2007e. AWP T5: Füllen von Erdwärmesondenanlagen [Filling of geothermal probe systems]. Arbeitsgemeinschaft Wärmepumpen (AWP). Available from http://www.pac.ch/dateien/T5_Fullen_von_Erdwarmesondenanlagen.pdf [cited 20 February 2013].
20. AWP. 2007f. AWP T9: Kühlen mit Wärmepumpen [Cooling with heat pumps]. Arbeitsgemeinschaft Wärmepumpen (AWP). Available from http:// www.pac.ch/dateien/T9_Kuhlen_mit_Warmepumpen.pdf [cited 20 February 2013].
21. Banks, D. 2008. An Introduction to Thermogeology: Ground Source Heating and Cooling. Wiley-Blackwell Publishing, Ltd., Oxford, UK.
22. Bauer, D., Heidemann, W., Müller-Steinhagen, H., and Diersch, H.J. 2009. Modelling and simulation of groundwater influence on borehole thermal energy stores. In Proceedings of Effstock 11th International Conference on Energy Storage, Stockholm, Sweden.
23. Bertani, R. 2005. World geothermal power generation in the period 2001-2005. Geothermics, 34(6): 651-690. doi:10.1016/j.geothermics.2005.09.005.
24. Blomberg, T. 1996. Heat conduction in two and three dimensions-computer modelling of building physics applications. Doctorate thesis, Department of Building Physics, Lund University, Lund, Sweden.
25. Brielmann, H., Griebler, C., Schmidt, S.I., Michel, R., and Lueders, T. 2009. Effects of thermal energy discharge on shallow groundwater ecosystems. FEMS Microbiology Ecology, 68(3): 273-286. doi:10.1111/j.1574-6941.2009.00674.x. PMID:19416351.
26. Brodie-Brown, H. 2010. Earth energy systems in Ontario-types, regulations and potential implications for source protection. Presentation at South Georgian Bay Lake Simcoe-Source Protection Meeting, Ontario Ministry of the Environment, 27 May 2010. [Online.] Available from http://www.ourwatershed.ca/ assets/downloads/spc/presentation_2010_may27_geothermal.pdf [cited 24 May 2012].
27. BSI. 2007. Heating systems in buildings-design of heat pump heating systems.
28. EN 15450. British Standards Institution (BSI). Available from http:// shop.bsigroup.com/ProductDetail/?pid=000000000030144934 [cited 20 February 2013].
29. Canadian Department of Justice. 1985. Canadian Fisheries Act (R.S.C. 1985, c. F-14). [Online]. Available from http://laws-lois.justice.gc.ca/eng/acts/F-14/ [cited 24 May 2012].
30. Canadian Department of Justice. 1992. Canadian Constitution Acts (1867 to 1982, 92A). [Online.] Available from http://laws-lois.justice.gc.ca/eng/Const/page-4.html [cited 25 March 2013].
31. Canadian Department of Justice. 2002. Canadian Species at Risk Act (S.C. 2002, c. 29). [Online.] Available from http://laws-lois.justice.gc.ca/eng/acts/S-15.3/ [cited 25 May 2012].
32. Cappetti, G., Passaleva, G., and Sabatelli, F. 2000. Italy country update report 1995-1999. In Proceedings World Geothermal Congress, Kyushu-Tohoku, 10. Japan, 28 May-10 June 2000. pp. 109-116.
33. Carslaw, H.S., and Jaeger, J.C. 1959. Conduction of heat in solids. Claremore Press, Oxford, UK.
34. CGC. 2010a. The state of the Canadian geothermal heat pump industry 2010-industry survey and market analysis-including provincial highlights and analyses. Canadian GeoExchange Coalition (CGC).
35. CGC. 2010b. Design and installation of residential ground source heat pump systems. Canadian GeoExchange Coalition (CGC).
36. CGC. 2011. The state of the Canadian geothermal heat pump industry 2010-industry survey and market analysis-including provincial highlights and analyses. Canadian GeoExchange Coalition (CGC).
37. CGC. 2012. GeoAnalyser Webware. [Online.] Canadian GeoExchange Coalition (CGC). Available from http://www.geoanalyser.com/ [cited 24 May 2012].
38. Chiasson, A. 1999. Advances in modelling of ground-source heat pump systems. Master's thesis, Faculty of the Graduate College, Oklahoma State University, Okla.
39. Claesson, J., and Eskilson, P. 1988. Conductive heat extraction to a deep borehole. Thermal analysis and dimensioning rules. Energy, 13(6): 509-527. doi: 10.1016/0360-5442(88)90005-9.
40. ClimateMaster. 2012. GeoDesigner Software. [Online.] Available from http:// www.climatemaster.com/geothermal-dealer/geothermal-sales-tools/ geodesigner/ [cited 24 May 2012].
41. Collins, P.A., Orio, C.D., and Smiriglio, S. 2002. Geothermal heat pump manual. New York City Department of Design and Construction, New York.
42. CSA. 2007. Design and installation of earth energy systems. CAN/CSA-C448 series-02 (R2007) consolidated. Canadian Standards Association (CSA).
43. Curtis, R.H., Lund, J., Sanner, B., Rybach, L., and Hellström, G. 2005. Ground Source heat pumps-geothermal energy for anyone, anywhere: current worldwide activity. In Proceedings of World Geothermal Congress 2005, Turkey. International Geothermal Association.
44. Danish Department of Civil Affairs. 2006. Bekendtgørelse om varmeindvindingsanlæg og grundvandskøleanlæg. [Order on heat recovery systems and groundwater cooling system.] BEK nr 1206 af 24/11/2006. Danish Ministry of Justice, Department of Civil Affairs. [Online.] Available from https:// www.retsinformation.dk/forms/R0710.aspx?id=127761 [cited 24 May 2012].
45. Danish Department of Civil Affairs. 2009. Bekendtgørelse om jordvarmeanlæg. [Order on the geothermal system.] BEK nr 1019 af 25/10/2009. Danish Ministry of Justice, Department of Civil Affairs. [Online.] Available from https:// www.retsinformation.dk/Forms/R0710.aspx?id=12964 [cited 24 May 2012].
46. Dehkordi, S.E. 2009. Ground water resources in coastal hard rock terrains: geostatistical and GIS approach. Master's thesis, Department of Land and Water Resources Engineering, Royal Institute of Technology (KTH), Stockholm, Sweden.
47. Dehkordi, S.E., and Schincariol, R.A. 2014. Effect of thermal-hydrogeological and borehole heat exchanger properties on performance and impact of vertical closed loop geothermal heat pump systems. (Theme issue: Hydrogeology of shallow thermal systems). Hydrogeology Journal, 22(1): 189-203. doi:10.1007/ s10040-013-1060-6.
48. Den Braven, K. 1998. Survey of geothermal heat pump regulations in the United States. In Proceedings of the Second Stockton International Geothermal Conference, 16-17 March 1998.
49. Denicer, I., and Rosen, M.A. 2007. A unique borehole thermal storage systems at University of Ontario Institute of Technology. In Thermal energy storage for sustainable energy consumption fundamentals, case studies and design. Edited by H. Ö. Paksoy. Springer, the Netherlands. pp. 221-228. doi:10.1007/978-1-4020-5290-3_12.
50. Diao, N., Li, Q., and Fang, Z. 2004. Heat transfer in ground heat exchangers with groundwater advection. International Journal of Thermal Sciences, 43: 1203-1211. doi:10.1016/j.ijthermalsci.2004.04.009.
51. Diersch, H.-J.G., Bauer, D., Heidemann, W., Rühaak, W., and Schätzl, P. 2011a. Finite element modeling of borehole heat exchanger systems: Part 1. Fundamentals. Computers & Geosciences, 37(8): 1122-1135. doi:10.1016/j.cageo.2010. 08.003.
52. Diersch, H.-J.G., Bauer, D., Heidemann, W., Rühaak, W., and Schätzl, P. 2011b. Finite element modeling of borehole heat exchanger systems: Part 2. Numerical simulation. Computers & Geosciences, 37(8): 1136-1147. doi:10.1016/j. cageo.2010.08.002.
53. DOV. 2013a. Databank Ondergron Vlaanderen (DOV). [Online.] Available from: https://dov.vlaanderen.be/dovweb/html/themaviewerr55.html [cited 31 March 2013].
54. DOV. 2013b. Bepalen van de klasse van een verticale boring (rubriek 55.1-VLAREM). [Determining the class of a vertical bore (section 55.1-VLAREM).] Databank Ondergron Vlaanderen (DOV). [Online.] Available from: https:// www.dov.vlaanderen.be/rubriek55/ [cited 31 March 2013].
55. EGEC. 2008. Geothermal Heat pumps-Ground source Heat pumps. [Online.] European Geothermal Energy Council (EGEC). Available from http:// egec.info/wp-content/uploads/2011/01/Brochure-Innovative-Geothermalapplications. pdf [cited 24 May 2012].
56. Energy Saving Trust. 2007. Domestic ground source heat pumps: design and installation of closed-loop systems-a guide for specifiers, their advisors and potential users. [Online.] Energy Saving Trust. Available from http:// www.energysavingtrust.org.uk/content/download/71571/858743/version/1/ file/CE82+-+Domestic+Ground+Source+Heat+Pumps.pdf [cited 24 May 2012].
57. EU Commission SAVE Programme and Nordic Energy Research. 2005. Soil Cool/ Rykel project-ground source cooling-Working paper on usable tools and methods. Edited by Thomas Schmidt and Göran Hellström. [Online.] EU Commission SAVE Programme and Nordic Energy Research. Available from http:// www.cowiprojects.com/SoilCool/pdf/Usable_Tools_Methods.PDF [cited 24 May 2012].
58. European Parliament and Council. 2000. European Water Framework Directive. Directive 2000/60/EC of the European Parliament and of the Council of 23 October 2000 establishing a framework for Community action in the field of water policy. [Online.] Available from http://eur-lex.europa.eu/LexUriServ/ LexUriServ.do?uri=CELEX:32000L0060:EN:NOT [cited 24 May 2012].
59. Ferguson, G., and Woodbury, A.D. 2005. Thermal sustainability of groundwatersource cooling in Winnipeg, Manitoba. Canadian Geotechnical Journal, 42(5): 1290-1301. doi:10.1139/t05-057.
60. Ferguson, G., and Woodbury, A.D. 2006. Observed thermal pollution and postdevelopment simulations of low-temperature geothermal systems in Winnipeg, Canada. Hydrogeology Journal, 14(7): 1206-1215. doi:10.1007/s10040-006-0047-y.
61. Ferguson, G., and Woodbury, A.D. 2007. The Urban Heat Island in the Subsurface. Geophysical Research Letters, 34, L23713. doi:10.1029/2007GL032324.
62. Florides, G., and Kalogirou, S.S. 2007. Ground heat exchangers-A review of systems, models and applications. Renewable Energy, 32(15): 2461-2478. doi:10. 1016/j.renene.2006.12.014.
63. Freeston, D.H. 1995. Direct uses of geothermal energy 1995 (preliminary review). In Proceedings of the World Geothermal Congress 1995, International Geothermal Association, Florence. pp. 15-25.
64. Fujii, H., Itoi, R., Fujii, J., and Uchida, Y. 2005. Optimizing the design of largescale ground-coupled heat pump systems using groundwater and heat transport modeling. Geothermics, 34(3): 347-364. doi:10.1016/j.geothermics.2005. 04.001.
65. Gehlin, S. 2002. Thermal response test-method development and evaluation. Doctoral thesis, Luleå University of Technology, Lund, Sweden.
66. Gordon, C., and Toze, S. 2003. Influence of groundwater characteristics on the survival of enteric viruses. Journal of Applied Microbiology, 95(3): 536-544. doi:10.1046/j.1365-2672.2003.02010.x. PMID:12911702.
67. Government of British Columbia. 2004. British Columbia Ground Water Protection Regulation. B.C. Reg. 299/2004. Available from http://www.bclaws.ca/ EPLibraries/bclaws_new/document/ID/freeside/11_299_2004 [cited 13 September 2013].
68. Government of Manitoba. 2012. Manitoba Groundwater and Water Well Act. [Online.] Available from http://web2.gov.mb.ca/laws/statutes/2012/ c02712e.php [cited 30 March 2013].
69. Government of New Brunswick. 2000. New Brunswick Regulation 2000-47 under the Clean Water Act O.C. 2000-451. Available from: http://laws.gnb.ca/en/ showdoc/cr/2000-47 [cited 13 September 2013].
70. Government of Nova Scotia. 1990. Nova Scotia Mineral Resources Act. Chapter 18 of the Acts of 1990. Available from http://nslegislature.ca/legc/statutes/ mineralr.htm [cited 13 September 2013].
71. Government of Ontario. 1990a. Ontario Water Resources Act, R.S.O. Chapter O.40. [Online.] Available from http://www.e-laws.gov.on.ca/html/statutes/ english/elaws_statutes_90o40_e.htm [cited 25 May 2012].
72. Government of Ontario. 1990b. Regulation 903: Wells. Ontario Water Resources Act, R.R.O. [Online.] Available from http://www.e-laws.gov.on.ca/html/regs/ english/elaws_regs_900903_e.htm.
73. Government of Ontario. 1990c. Ontario Environmental Protection Act, R.S.O. 1990. Chapter E.19. [Online.] Available from http://www.e-laws.gov.on.ca/ html/statutes/english/elaws_statutes_90e19_e.htm [cited 25 May 2012].
74. Government of Ontario. 1992. Ontario Building Code. Ontario Regulation 350/ 06, under the Ontario Building Code Act. Government of Ontario. [Online.] Available from http://www.e-laws.gov.on.ca/html/regs/english/ elaws_regs_120332_e.htm [cited 6 May 2014].
75. Government of Ontario. 2012. Ontario Regulation 98/12: Ground source heat pumps. Ontario Environmental Protection Act. [Online.] Available from http://www.e-laws.gov.on.ca/html/regs/english/elaws_regs_120098_e.htm.
76. Ground-Reach. 2008. Inventory of EU Legislation on ground coupled heat pumps (GCHPS). [Online.] Available from http://groundreach.fiz-karlsruhe.de/script/ tool/forg/doc822/D9InventoryEUlegislationGCHPs.pdf [cited 24 May 2012].
77. Haehnlein, S., Bayer, P., and Blum, P. 2010. International legal status of the use of shallow geothermal energy Renew. Sustainable Energy Reviews, 14(2010): 2611-2625.
78. Hecht-Méndez, J., Molina-Giraldo, N., Blum, P., and Bayer, P. 2010. Evaluating MT3DMS for heat transport simulation of closed geothermal systems. Ground Water, 48(5): 741-756. doi:10.1111/j.1745-6584.2010.00678.x. PMID: 20132325.
79. Heinonen, E.W., Wildin, M.W., Beall, A.N., and Tapscott, R.E. 1997. Assessment of antifreeze solutions for ground-source heat pump systems. ASHRAE Transactions, 103(2): 747-756.
80. Heinonen, E.W., Wildin, M.W., Beall, A.N., and Tapscott, R.E. 1998. Anti-freeze fluid environmental and health evaluation-an update. In Proceedings of the Second Stockton International Geothermal Conference, 16-17 March 1998.
81. Hellström, G. 1991. Ground heat storage: Thermal analyses of duct storage systems. Doctoral thesis, Department of Mathematical Physics, University of Lund, Lund, Sweden.
82. Hellström, G. 1998. Thermal performance of borehole heat exchangers. In Proceedings of the Second Stockton International Geothermal Conference, 16-17 March 1998.
83. Hellström, G., and Sanner, B. 2001. PC-Programs and Modelling for Borehole Heat Exchanger Design. In Proceedings of IGD 2001, Bad Urach, Germany. [Online.] Available from www.buildingphysics.com/eed-iss.pdf [cited 24 May 2012].
84. IGSHPA. 2010. Closed-loop/Geothermal heat pump systems-Design and installation standards. 2010 edition. Edited by A. Skouby. International Ground Source Heat Pump Association (IGSHPA), Oklahoma State University, Stillwater, Okla., USA. [Online.] Available from http://www.igshpa.okstate.edu/ pdf_files/publications/Standards2010s.pdf [cited 2 May 2012].
85. Ingersoll, L.R., Adler, F.T., Plass, H.J., and Ingersoll, A.C. 1950. Theory of heat exchangers for heat pump. ASHRAE Transactions, 56: 167-188.
86. Ingersoll, L.R., Zobel, O.J., and Ingersoll, A.C. 1954. Heat conduction with engineering, geological, and other applications. McGraw-Hill, New York.
87. Joint Committee on Administrative Rules. 2013. Illinois Administrative Code, Title 77: Public Health, Chapter I: Department of Public Health, Subchapter r: Water and Sewage, Part 920 Illinois Water Well Construction Code. Illinois General Assembly. [Online.] Available from http://www.ilga.gov/commission/ jcar/admincode/077/07700920sections.html [cited 24 May 2012].
88. Kavanaugh, S.P. 1992. Simulation of ground-coupled heat pumps with an analytical solution. In Proceedings of the ASME International Solar Energy Conference, Solar Engineering, New York.
89. Kavanaugh, S.P., and Calvert, T.H. 1995. Performance of ground source heat pumps in North Alabama. Final Report, Alabama Universities and Tennessee Valley Authority Research Consortium. University of Alabama, Tuscaloosa.
90. Kavanaugh, S.P., and Rafferty, K. 1997. Ground-source heat pumps-Design of geothermal systems for commercial and institutional buildings. ASHRAE, Atlanta, Ga.
91. Kolditz, O., Ratke, R., Diersch, H.-J.G., and Zielke, W. 1998. Coupled ground water flow and transport: 1. Verification of variable density flow and transport models. Advances in Water Resources, 21(1): 27-46. doi:10.1016/S0309-1708(96)00034-6.
92. Lazzari, S., Priarone, A., and Zanchini, E. 2010. Long-term performance of borehole heat exchanger fields with groundwater movement. In Proceedings of the COMSOL Conference 2010, Paris.
93. Lee, C.K., and Lam, H.N. 2008. Computer simulation of borehole ground heat exchangers for geothermal heat pump systems. Renewable Energy, 33(6): 1286-1296. doi:10.1016/j.renene.2007.07.006.
94. Lee, C.K., and Lam, H.N. 2009. Determination of groundwater velocity in thermal response test analysis. In Proceedings of the Effstock 2009 Conference, Stockholm, Sweden, 14-17 June. Paper 17.
95. Li, Z., and Zheng, M. 2009. Development of a numerical model for the simulation of vertical U-tube ground heat exchangers. Applied Thermal Engineering, 29(5-6): 920-924. doi:10.1016/j.applthermaleng.2008.04.024.
96. Lund, J.W., and Bertani, R. 2010. Worldwide geothermal utilization 2010. Newsletter of the International Geothermal Association, IGA News, 80: 7-11.
97. Lund, J.W., and Freeston, D.H. 2000. World-wide direct uses of geothermal energy 2000. In Proceedings of the World Geothermal Congress, Japan, 2000. pp. 1-21.
98. Lund, J., Sanner, B., Rybach, L., Curtis, R., and Hellström, G. 2004. Geothermal (ground-source) heat pumps: a world overview. Geo-Heat Center (GHC) Bulletin, September 2004, pp. 1-10.
99. Lund, J.W., Freeston, D.H., and Boyd, T.L. 2005. Direct application of geothermal energy: 2005 worldwide review. Geothermics, 34(6): 691-727. doi:10.1016/j. geothermics.2005.09.003.
100. Lyons, K. 2009. A Regulatory Guide to Low Temperature Geothermal Development in Washington. Washington State University Extension Energy Program, Wash., USA. [Online.] Available from http://www.energy.wsu.edu/ Documents/WA_Regulatory%C2%ADGuide%C2%AD_for_Low_Temp_ Geothermal.pdf [cited 25 May 2012].
101. Markle, J.M., and Schincariol, R.A. 2007. Thermal plume transport from sand and gravel pits-Potential thermal impacts on cool water streams. Journal of Hydrology, 338(3-4): 174-195. doi:10.1016/j.jhydrol.2007.02.031.
102. Markusson, N., Monsen, K., and Russell, S. 2009. Project-Promotion of efficient heat pumps for heating (ProHeatPump) EIE/06/072 / S12.444283-Supplementary report: Heat pumps in Norway-Work Package 4: Policy context and measures. Intelligent Energy Europe, University of Edinburgh, Edinburgh, Scotland. [On-line.] Available from http://www.geos.ed.ac.uk/homes/nmarkuss/HPNorway.pdf [cited 25 May 2012].
103. Massachusetts Department of Environmental Protection. 2012. Massachusetts
104. Guidelines for Ground Source Heat Pump Wells. 2012. Massachusetts Department of Environmental Protection. [Online.] Available from http:// www.mass.gov/dep/water/laws/gshpguid.pdf [cited 25 May 2012].
105. Midttømme, K. 2005. Norway's geothermal energy situation. In Proceedings of the World Geothermal Congress 2005, Antalya, Turkey, 24-29 April 2005.
106. Midttømme, K., Banks, D., Ramstad, R.K., Sæther, O.M., and Skarphagen, H. 2008. Ground-source heat pumps and underground thermal energy storage-energy for the future. Edited by T. Slagstad. In Geology for Society, Geological Survey of Norway Special Publication, Vol. 11, pp. 93-98.
107. Ministry of Foreign Affairs of Denmark. 2012. The official website of Denmark. [Online.] Available from http://www.denmark.dk [cited 25 May 2012].
108. Mississippi Department of Environmental Quality. 2009. Mississippi Commission on Environmental Quality Regulation, Part 7, Chapter 2: Licensing of water well contractors. Mississippi Department of Environmental Quality. [Online.] Available from http://www.deq.state.ms.us/mdeq.nsf/pdf/ legal_11Miss.Admin.CodePt.7Ch.2./$File/11 Miss. Admin. Code Pt. 7 Ch. 2.pdf? OpenElement [cited 25 May 2012].
109. Missouri Secretary of State. 2010. Missouri Code of State Regulations, Title 10-Department of Natural Resources, Division 23-Division of Geology and Land Survey, Chapter 3-Well Construction Code, and Chapter 5-Heat Pump Construction Code. Missouri Secretary of State. [Online.] Available from http://www.sos.mo.gov/adrules/csr/current/10csr/10csr.asp [cited 25 May 2012].
110. MVV-Consulting. 2007. Technical assistance on the standards and codes applied to heating and cooling from renewable energies sector, p. 72.
111. Nam, Y., Ooka, R., and Hwang, S. 2008. Development of a numerical model to predict heat exchange rates for a ground-source heat pump system. Energy and Buildings, 40(12): 2133-2140. doi:10.1016/j.enbuild.2008.06.004.
112. NGWA. 2010a. 2009/2010 geothermal heating and cooling systems state regulatory oversight survey. National Ground Water Association (NGWA), USA.
113. NGWA. 2010b. Guidelines for the construction of loop wells for vertical closed loop ground source heat pump systems. Edited by J.T. Jenkins. National Ground Water Association (NGWA), USA. Available from https://info.ngwa.org/ servicecenter/shopper/ProductDetail.cfm?ProdCompanyPassed=ngw&ProdCd Passed=ngw-t1074 [cite 20 February 2013].
114. Ochsner, K. 2007. Geothermal heat pumps: a guide for planning and installing, Earthscan, London, UK, and Sterling, Va.
115. Oriol, L. 2010. Ground source heat pumps: development prospect in France. Degree Project. Department of Land and Water Resources, Royal Institute of Technology (KTH), Stockholm, Sweden.
116. ÖWAV. 2009. ÖWAV-RB 207: Thermische Nutzung des Grundwassers und des Untergrundes zum Heizen und Kühlen. (Thermal use of the groundwater and underground for heating and cooling.) Österreichischer Wasser-und Abfallwirtschaftsverband (ÖWAV). Available from http://www.oewav.at/Page.aspx? target=65710&mode=form&app=134598&edit=0¤t=67517&view= 134599&predefQuery=-1 [cite 20 February 2013].
117. Popiel, C., Wojtkowiak, J., and Biernacka, B. 2001. Measurements of temperature distribution in ground. Experimental Thermal and Fluid Science, 25(5): 301-309. doi:10.1016/S0894-1777(01)00078-4.
118. Priarone, A., Lazzari, S., and Zanchini, E. 2009. Numerical evaluation of longterm performance of borehole heat exchanger fields. In Proceedings of the COMSOL Conference, Milan, Italy. 14-16 October 2009.
119. Renac, C., Gal, F., Ménot, R.-P., Squarcioni, P., and Perrache, Ch. 2009. Mean recharge times and chemical modelling transfers from shallow groundwater to mineralized thermal waters at Montrond-les-Bains, Eastern Massif Central, France. Journal of Hydrology, 376(1-2): 1-15. doi:10.1016/j.jhydrol.2009.07.011.
120. Reuss, M., E. Konstantinidou, and B. Sanner. 2006. 10 Years VDI 4640-German guidelines for ground coupled heat pumps, UTES and direct thermal use of the underground. [Online.] Available from http://intraweb.stockton.edu/ eyos/energy_studies/content/docs/final_papers/5a-3.pdf
121. Rosén, B., Gabrielsson, A., Fallsvik, J., Hellström, G., and Nilson, G. 2001. System för värme och kyla ur mark-En nulägesbeskrivning. [Systems for ground source heating and cooling-a status report.] Varia 511, Statens Geotekniska Institut [Swedish Geotechnical Institute], Linköping, Sweden. [In Swedish.]
122. Rosén, B., Gabrielsson, A., Hellström, G., and Nilsson, G. 2006. System för värme och kyla ur mark-Demonstrationsobjekt över jordvärmeanläggningar [Systems for heating and cooling of the land-Demonstration object of geothermal plants]. Varia 556, Statens Geotekniska Institut [Swedish Geotechnical Institute], Linköping, Sweden.
123. Rybach, L., and W.J. Eugster, 2002. Sustainability aspects of geothermal heat pumps. In Proceedings of the 27th Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, California, pp. 50-64.
124. Sanner, B. 2008. Guidelines, standards, certification and legal permits for ground source heat pumps in the European Union. In Proceedings of the 9th International IEA Heat Pump Conference, Zürich, Switzerland, 20-22 May 2008.
125. Sanner, B., and Boissavy, C. 2007. Geothermal Energy for heating and cooling-a roadmap to 2020 (EU-project K4RES-H), In Proceedings of European Geothermal Congress 2007, Unterhaching, Germany, 30 May-1 June 2007.
126. Sanner, B., Karytsas, C., Mendrinos, D., and Rybach, L. 2003. Current status of ground source heat pumps and underground thermal energy storage in Europe. Geothermics, 32(4-6): 579-588. doi:10.1016/S0375-6505(03)00060-9.
127. Schellschmidt, R., Sanner, B., Pester, S., and Schulz, R. 2010. Geothermal energy use in Germany. In Proceedings of World Geothermal Congress 2010, Bali, Indonesia.
128. Schincariol, R.A., and Schwartz, F.W. 1990. An experimental investigation of variable density flow and mixing in homogeneous and heterogeneous media. Water Resources Research, 26(10): 2317-2329. doi:10.1029/WR026i010p02317.
129. SGU. 2007. Normbrunn-07: Att borra brunn för energy och vatten-en vägledning, Normförfarande vid utförande av vatten-och energibrunnar. [To drill wells for energy and water-a guide, Standard Procedure for the provision of water and energy wells.] Sveriges Geologiska Undersökning (SGU) [Geological Survey of Sweden]. [Online.] Available from http://www.sgu.se/dokument/ service_sgu_publ/normbrunn-07.pdf [cited 20 February 2013].
130. Signorelli, S., Kohl, T., and Rybach, L. 2004. Sustainability of production from borehole heat exchanger fields. In Proceedings of the 29th Workshop on Geothermal Reservoir Engineering, Stanford University, Calif. pp. 356-361.
131. Signorelli, S., Kohl, T., and Rybach, L. 2005. Sustainability of production from borehole heat exchanger fields. In Proceedings of World Geothermal Congress 2005, Antalya, Turkey, 24-29 April 2005.
132. Snijders, A.L. 2005. aquifer thermal energy storage in Netherlands: status beginning of 2005. IFTech international B.V. [Online.] Available from www.iftec.es/ file.cgi?id=6 [cited 25 May 2012].
133. Sowers, L., York, K.P., and Stiles, L. 2006. Impact of thermal buildup on groundwater chemistry and aquifer microbes. In Proceedings of Stockton Conference 2006.
134. Spitler, J.D., Marshall, C., Delahoussaye, R., and Manicham. M. 1996. Users Guide of GLHEPRO, School of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, Okla. [Online.] Available from http://www. hvac.okstate.edu/glhepro/Manualv4.pdf [cited 25 May 2012].
135. Therin, F. 2010. Vent de folie sur la géothermie allemande. Les Echos Newspaper, 17 May 2010, pp. 10-13.
136. Toneby, R. 2010. Värmepumpen-en del av Sverige [The heat pump-a part of Sweden], Svenska Värmepumpföreningen (SVEP) [Swedish Heat Pump Association], 10. Presentation in Halland October 2010. [Online.] Available from http://www.svepinfo.se/usr/svep/resources/filearchive/9/varmepumpen_ en_del_av_sverige.pdf [cited 25 May 2012].
137. Törnros, T. 2007. Interpolation and visualisation of groundwater exploitation potential: reliability and probability maps. Master's thesis, Department of Land and Water Resources Engineering, Royal Institute of Technology (KTH), Stockholm, Sweden.
138. Utah Department of Administrative Services. 1992. Utah Administrative Code, Rule R655-1: Wells Used for the Discovery and Production of Geothermal Energy in the State of Utah. Utah Department of Administrative Services. [Online.] Available from http://www.rules.utah.gov/publicat/code/r655/r655-001.htm [cited 25 May 2012].
139. Utah State Legislature. 2012. Utah Code-Title 73-Chapter 22-Utah Geothermal Resource Conservation Act. Utah State Legislature. [Online.] Available from http://le.utah.gov/UtahCode/section.jsp?code=73-22 [cited 30 March 2013].
140. van Heekeren, E.V., and Koenders, M. 2010. The Netherlands country update on geothermal energy. In Proceedings of the World Geothermal Congress 2010, Bali, Indonesia.
141. VDI. 2001a. VDI 4640, Blatt 2: Thermische Nutzung des Untergrundes-Erdgekoppelte Wärmepumpen [VDI 4640 Part 2 Thermal use of the underground-Ground source heat pump systems]. Verein Deutscher Ingenieur (VDI). Available from http://www.vdi.de/technik/fachthemen/energieund-umwelt/fachbereiche/energiewandlung-und-anwendung/richtlinien/ richtliniendetails/rili/91422/ [cited 20 February 2013].
142. VDI. 2001b. VDI 4640, Blatt 3: Thermische Nutzung des Untergrundes-Unterirdische Thermische Energiespeicher [VDI 4640 Part 3 Utilization of the subsurface for thermal purposes-Underground thermal energy storage]. Verein Deutscher Ingenieur (VDI). Available from http://www.vdi.de/technik/ fachthemen/energie-und-umwelt/fachbereiche/energiewandlung-undanwendung/ richtlinien/richtliniendetails/rili/91423/ [cited 20 February 2013].
143. VDI. 2004. VDI 4640, Blatt 4: Thermische Nutzung des Untergrundes-Direkte Nutzungen [VDI 4640 Part 4 Thermal use of the underground-Direct uses]. Verein Deutscher Ingenieur (VDI). Available from http://www.vdi.de/technik/ fachthemen/energie-und-umwelt/fachbereiche/energiewandlung-undanwendung/ richtlinien/richtliniendetails/rili/91424/ [cited 20 February 2013].
144. VDI. 2010. VDI 4640, Blatt 1: Thermische Nutzung des Untergrundes-Grundlagen, Genehmigungen, Umweltaspekte.[VDI 4640 Part 1 Thermal use of the underground-Fundamentals, approvals, environmental aspects]. Verein Deutscher Ingenieur (VDI). Available from http://www.vdi.de/technik/ fachthemen/energie-und-umwelt/fachbereiche/energiewandlung-undanwendung/ richtlinien/richtliniendetails/rili/93182/ [cited 20 February 2013].
145. VITO. 2013. Navigator Wetgeving Leefmilieu, Natuur en Energie [Navigator Legislation Environment, Nature and Energy]. [Online.] Flemish Institute for Technological Research (VITO). Available from: http://navigator.emis.vito.be/milnav-consult/ consultatieLink?wettekstId=34194&appLang=nl&wettekstLang=nl [cited 31 March 2013].
146. Wagner, V., Blum, P., Kübert, M., and Bayer, P. 2013. Analytical approach to groundwater-influenced thermal response tests of grouted borehole heat exchangers. Geothermics, 46(0): 22-31. doi:10.1016/j.geothermics.2012.10.005.
147. Wang, H., Yang, B., Xie, J., and Qi, C. 2013. Thermal performance of borehole heat exchangers in different aquifers: a case study from Shouguang. International Journal of Low-Carbon Technologies, 8(4): 253-259. doi:10.1093/ijlct/ cts043.
148. Washington's Secretary of State. 2008. Washington State University Extension Energy Program by Kim Lyons. A regulatory guide to geothermal direct use development-UTAH. Washington's Secretary of State. [Online.] Available from http://wsldocs.sos.wa.gov/library/docs/wsu/utah_2008_005018.pdf [cited 25 May 2012].
149. Yang, H., Cui, P., and Fang, Z. 2010. Vertical-borehole ground-coupled heat pumps: A review of models and systems. Applied Energy, 87(1): 16-27. doi:10. 1016/j.apenergy.2009.04.038.
150. York, K.P., Jahangir, Z.M.G.S., Solomon, T., and Stafford, L. 1998. Effects of a large scale geothermal heat pump installation on aquifer microbiota. In Proceedings of the Second Stockton International Geothermal Conference, 16-17 March, 1998.
151. Zeng, H.Y., Diao, N.R., and Fang, Z. 2002. A finite line-source model for boreholes in geothermal heat exchangers. Heat Transfer Asian Research, 31(7): 558-567. doi:10.1002/htj.10057.
152. Zhang, T. 2005. Influence of the seasonal snow cover on the ground thermal regime: an overview. Reviews of Geophysics, 43(4): 1-23. doi:10.1029/ 2004RG000157.