Application Theme 3 – Geothermal Heating and Cooling

Groundwater source heat pumps exploit the difference between the ground surface temperature and the nearly constant temperature of shallow groundwater. This project characterizes two areas for geothermal heating and cooling potential, Mason County in central Illinois and the American Bottoms area in southwestern Illinois. Both areas are underlain by thick sand and gravel aquifers and groundwater is readily available. Weather data, including monthly high and low temperatures and heating and cooling degree days, were compiled for both study areas. The heating and cooling requirements for a single-family house were estimated using two independent models that use weather data as input. The groundwater flow rates needed to meet these heating and cooling requirements were calculated using typical heat pump coefficient of performance values. The groundwater in both study areas has fairly high hardness and iron concentrations and is close to saturation with calcium and iron carbonates. Using the groundwater for cooling may induce the deposition of scale containing one or both of these minerals.

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Hybrid Solar and Geothermal Heating and Cooling

Sustainable Energy Technologies ◽

10.1201/9781315269979-9 ◽

2017 ◽

pp. 131-142

Author(s):

Bernd Weber

Keyword(s):

Geothermal Heating ◽

Heating And Cooling

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Power Piping

10.1115/b31.1-2004 ◽

2010 ◽

Keyword(s):

High Temperature ◽

District Heating ◽

Cooling Systems ◽

Heating Systems ◽

Geothermal Heating ◽

Heating And Cooling ◽

Piping Systems ◽

Minimum Requirements ◽

Pressure Water ◽

Temperature Water

ASME B31.1 prescribes minimum requirements for the design, materials, fabrication, erection, test, inspection, operation, and maintenance of piping systems typically found in electric power generating stations, industrial and institutional plants, geothermal heating systems, and central and district heating and cooling systems.It also covers boiler-external piping for power boilers and high-temperature, high pressure water boilers in which steam or vapor is generated at a pressure of more than 15 psig; and high temperature water is generated at pressures exceeding 160 psig and/or temperatures exceeding 250 degrees F.

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Pipe for geothermal heating and cooling systems

Geothermics ◽

10.1016/s0375-6505(97)90050-x ◽

1997 ◽

Vol 26 (5-6) ◽

pp. 726

Keyword(s):

Cooling Systems ◽

Geothermal Heating ◽

Heating And Cooling

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Power Piping

10.1115/b31.1-2012 ◽

2012 ◽

Keyword(s):

High Temperature ◽

District Heating ◽

Cooling Systems ◽

Heating Systems ◽

Geothermal Heating ◽

Heating And Cooling ◽

Piping Systems ◽

Minimum Requirements ◽

Pressure Water ◽

Temperature Water

ASME B31.1 prescribes minimum requirements for the design, materials, fabrication, erection, test, inspection, operation, and maintenance of piping systems typically found in electric power generating stations, industrial and institutional plants, geothermal heating systems, and central and district heating and cooling systems.It also covers boiler-external piping for power boilers and high-temperature, high pressure water boilers in which steam or vapor is generated at a pressure of more than 15 psig; and high temperature water is generated at pressures exceeding 160 psig and/or temperatures exceeding 250 degrees F.

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A comprehensive study of geothermal heating and cooling systems

Sustainable Cities and Society ◽

10.1016/j.scs.2018.09.036 ◽

2019 ◽

Vol 44 ◽

pp. 793-818 ◽

Cited By ~ 39

Author(s):

M. Soltani ◽

Farshad M. Kashkooli ◽

A.R. Dehghani-Sanij ◽

A.R. Kazemi ◽

N. Bordbar ◽

...

Keyword(s):

Cooling Systems ◽

Geothermal Heating ◽

Heating And Cooling ◽

Comprehensive Study

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Gradient Based Soil Thermal Conductivity Optimization for Ground Source Heat Exchangers

ASME 2018 12th International Conference on Energy Sustainability ◽

10.1115/es2018-7418 ◽

2018 ◽

Author(s):

Anthony A. DiCarlo ◽

Rickey A. Caldwell

Keyword(s):

Heat Exchangers ◽

Optimal Distribution ◽

Soil Thermal Conductivity ◽

Geothermal Heating ◽

Heating And Cooling ◽

Ground Source ◽

Gradient Based ◽

Simulated Case ◽

Overall Efficiency ◽

Gradient Approach

In geothermal heating and cooling, there exists an opportunity to improve the efficiency by utilizing non-uniform soil properties of a ground source heat exchanger during installation. This paper presents a gradient approach based upon finite element mathematics to determine an optimal distribution of heterogeneous soils with varying thermal conductivities. The numerically simulated case studies demonstrate the good performance of this algorithm to minimize the cross-talk of heat flux between pipes and maximize the overall efficiency.

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