Estimating low-enthalpy geothermal energy potential for district heating in Santiago basin–Chile (33.5 °S)

Muñoz, Mauricio; Garat, Pablo; Flores‐Aqueveque, Valentina; Vargas, Gabriel; Rebolledo, Sofía; Mora, Sergio Basilio Sepúlveda; Daniele, Linda; Morata, Diego; Parada, Miguel A.

doi:10.1016/j.renene.2014.11.019

Cited by 36 publications

(11 citation statements)

References 14 publications

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“…The methods vary from simulation [15], analytical [9,[16][17][18]and empirical models [15,19] to assess the GEP at relatively smaller city scales [9,20,21] as well as larger regional scales [16][17][18]. The purpose of these studies varies from large scale mapping [18,19,21], techno-economic decision support [16,22], CO 2 emissions mitigation [9,23], to building specific applications [9,20].…”

Section: Previous Workmentioning

confidence: 99%

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A methodology to calculate long-term shallow geothermal energy potential for an urban neighbourhood

Miglani

Orehounig

Carmeliet

2018

Energy and Buildings

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Ground source heat pumps typically use Borehole Heat Exchangers (BHEs) which are drilled vertically into the ground to extract heat. Space limitations in urban areas can limit the total length of BHEs. Continuous heat extraction over long period from BHEs especially with limited length results in cooling of the ground. Furthermore, the presence of neighbouring BHEs adds to the cooling effect thereby reducing the overall geothermal energy potential. Therefore, it is important to consider spatial constraints and the thermal interference from neighbouring BHEs when evaluating the geothermal energy potential of urban areas. In this paper, a methodology to calculate the long-term geothermal energy potential for an urban neighbourhood is developed. A GIS based workflow is used to design the BHEs for multiple buildings, in order to satisfy their total heating/cooling demand considering spatial constraints. A model that accounts for thermal interference between neighbouring BHEs is developed to simulate their operation and the long-term geothermal energy potential is calculated. The method is applied to an urban neighbourhood in Zurich, Switzerland with 170 buildings. Results show that the geothermal energy potential is overestimated if thermal interference between BHEs are not accounted for. A long-term declining trend is observed in the geothermal energy potential due to ground cooling.

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Section: Previous Workmentioning

confidence: 99%

“…They use measured COP values of GSHPs for each building. The sHE method is used in other studies such as Munoz et al [18] to calculate the shallow geothermal potential for the large Santiago basin in Chile. They focus on BHEs as well as ground water heat exchangers (GWHEs) with depth ranging from 10-400m.…”

Section: Previous Workmentioning

confidence: 99%

A methodology to calculate long-term shallow geothermal energy potential for an urban neighbourhood

Miglani

Orehounig

Carmeliet

2018

Energy and Buildings

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“…For these reasons, numerous district heating plants supplied by the mentioned energy were implemented in many countries during the last decade [9]. Most of them were installed in Europe, being France and Iceland in the lead [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Economic and Environmental Analysis of Different District Heating Systems Aided by Geothermal Energy

et al. 2018

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Abstract:As a renewable energy source, geothermal energy can provide base-load power supply both for electricity and direct uses, such as space heating. Regarding this last use, in the present study, district heating systems aided by geothermal energy, the so-called geothermal district heating systems, are studied. Thus, three different options of a geothermal district heating system are evaluated and compared in terms of environmental and economic aspects with a traditional fossil installation. Calculations were carried out from a particular study case, a set of buildings located Province of León in the north of Spain. From real data of each of the assumptions considered, an exhaustive comparison among the different scenarios studied, was thoroughly made. Results revealed the most suitable option from an economic point of view but always considering the environmental impacts of each one. In this regard, the assumption of a district heating system totally supplied by geothermal energy clearly stands out from the rest of options. Thus, the manuscript main objective is to emphasise the advantages of these systems as they constitute the ideal solution from both the economic and environmental parameters analysed.

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“…One benefit is its large heat storage capacity [2], which can store much more heat than individual storage solutions. Another benefit is the ability to utilize heat from a variety of sources, such as solar thermal, geothermal, and excess production from industrial processes as well as heat from combined heat and power plants [3][4][5][6]. A recent Chinse study shows the benefits of combing the heat and electricity sectors in terms of wind curtailment [7].…”

Section: Introductionmentioning

confidence: 99%

District Heating Expansion Potential with Low-Temperature and End-Use Heat Savings

Nielsen

Grundahl

2018

Energies

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District heating has the potential to play a key role in the transition towards a renewable energy system. However, the development towards reduced heat demands threatens the feasibility of district heating. Despite this challenge, opportunity exists in the form of fourth generation district heating, which operates at lower temperatures and enables better renewable integration. This article investigates this challenge by examining the district heating potential within three scenarios: The first is a reference scenario with current heat demand and temperatures, the second includes heat demand savings and the third includes reduced grid temperatures in addition to heat savings. To examine the scenarios, two models are developed. The first is a heat atlas model, in which heat demands are mapped on an address level. The second model assesses district heating expansion potentials based on economic costs. The models are applied using an example case of The Northern Region of Denmark. The article concludes that the district heating potential is highest in the reference scenario. When heat savings are introduced, district heating expansions, in most cases, will not be feasible. Introducing low-temperature district heating modestly increases the feasible expansion potential. This general conclusion is highly dependent on the specific system examined.

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Estimating low-enthalpy geothermal energy potential for district heating in Santiago basin–Chile (33.5 °S)

Cited by 36 publications

References 14 publications

A methodology to calculate long-term shallow geothermal energy potential for an urban neighbourhood

A methodology to calculate long-term shallow geothermal energy potential for an urban neighbourhood

Economic and Environmental Analysis of Different District Heating Systems Aided by Geothermal Energy

District Heating Expansion Potential with Low-Temperature and End-Use Heat Savings

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