Direct geothermal energy: harnessing an emerging technology

Grant number: FT140100227 | Funding period: 2015 - 2019

Completed

Abstract

To mitigate the impacts of climate change, the demand for renewable energy technologies with low greenhouse gas (GHG) emissions is rapidly becoming a global priority. Direct geothermal systems use shallow ground as a heat source and sink for heating and cooling buildings, using ground heat exchangers (GHEs) and heat pumps. Substituting common heating and cooling systems with geothermal ones can reduce energy consumption by up to 75 per cent and thus greenhouse gas emissions, since 91 per cent of electricity comes from fossil fuels in Australia. This project aims to develop new full scale physical and numerical models which will allow studying the effects of GHE configuration and intermittent..

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Related publications (16)

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Ground-Source Heat Pump Systems: The Effects of Variable Trench Separations and Pipe Configurations in Horizontal Ground Heat Exchangers

Yu Zhou, Asal Bidarmaghz, Nikolas Makasis, Guillermo Narsilio

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Ground-source heat pump systems are renewable and highly efficient HVAC systems that utilise the ground to exchange heat via groun..

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Comparative costs of ground source heat pump systems against other forms of heating and cooling for different climatic conditions

GR Aditya, O Mikhaylova, GA Narsilio, IW Johnston

2020-12-01

Ground source heat pump (GSHP) systems can provide cost effective and sustainable heating and cooling for buildings while using co..

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Energy diaphragm wall thermal design: The effects of pipe configuration and spacing

N Makasis, GA Narsilio

2020-07-01

Energy geo-structures utilise underground structures primarily designed for structural and geo-mechanical stability to also provid..

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Energy geostructures: A review of analysis approaches, in situ testing and model scale experiments

F Loveridge, JS McCartney, GA Narsilio, M Sanchez

2020-05-01

This position paper was developed by members of the task force on “Energy Geostructures” of the International Society of Soil Mech..

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The importance of boundary conditions on the modelling of energy retaining walls

N Makasis, GA Narsilio, A Bidarmaghz, IW Johnston, Y Zhong

2020-04-01

Shallow geothermal technologies have proven to efficiently provide renewable energy for space heating and cooling. Recently, signi..

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Cost Effectiveness of Energy Piles in Residential Dwellings in Australia

Qi Lu, Guillermo A Narsilio

2019-07-31

The cost effectiveness of energy piles used as part of Ground Source Heat Pump (GSHP) systems in residential buildings is presente..

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A robust prediction model approach to energy geo-structure design

Nikolas Makasis, Guillermo A Narsilio, Asal Bidarmaghz

2018-12-01

Energy geo-structures, such as piles or retaining walls, provide geothermal space heating and cooling, in addition to their struct..

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Heat exchange mechanisms in energy tunnel systems

Asal Bidarmaghz, Guillermo A Narsilio

2018-12-01

Ground Source Heat Pump (GSHP) systems are known for their efficiency in space heating and cooling, using the ground as a source o..

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Investigation of the effect of seasonal variation in ground temperature on thermal response tests

Linden Jensen-Page, Guillermo A Narsilio, Asal Bidarmaghz, Ian W Johnston

2018-09-01

Economical design of Ground Heat Exchangers (GHEs) relies significantly on accurate estimations of ground thermal properties, incl..

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Ground-source heat pump systems: The effect of variable pipe separation in ground heat exchangers

Nikolas Makasis, Guillermo A Narsilio, Asal Bidarmaghz, Ian W Johnston

2018-08-01

Closed loop ground-source heat pump (GSHP) systems use ground heat exchangers (GHEs) to transfer heat to and from the ground and e..

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Model predictive control for a solar assisted ground source heat pump system

Hansani Weeratunge, Guillermo Narsilio, Julian de Hoog, Simon Dunstall, Saman Halgamuge

2018-06-01

There has been an increased interest in cost and energy efficiency for heating, ventilation, and air conditioning systems for buil..

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A computational geometry approach to pore network construction for granular packings

Joost H van der Linden, Adnan Sufian, Guillermo A Narsilio, Adrian R Russell, Antoinette Tordesillas

2018-03-01

Pore network construction provides the ability to characterize and study the pore space of inhomogeneous and geometrically complex..

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Cost and performance data for residential buildings fitted with GSHP systems in Melbourne Australia

Qi Lu, Guillermo A Narsilio, Gregorius Riyan Aditya, Ian W Johnston

2017-06-01

The data reported in this article presents actual installation costs and performance data for a selection of residential Ground So..

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Thermal interaction between tunnel ground heat exchangers and borehole heat exchangers

Asal Bidarmaghz, Guillermo A Narsilio, Patrik Buhmann, Christian Moormann, Bernhard Westrich

2017-06-01

Renewable geothermal energy is an energy source that can be used for heating and cooling purposes. One common method of harvesting..

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Economic analysis of vertical ground source heat pump systems in Melbourne

Qi Lu, Guillermo A Narsilio, Gregorius Riyan Aditya, Ian W Johnston

2017-04-15

This study assesses some economic indicators for residential vertical Ground Source Heat Pump (GSHP) systems in Melbourne, Austral..

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Shallow geothermal energy: emerging convective phenomena in permeable saturated soils

A Bidarmaghz, GA Narsilio

2016-06-01

Ground source heat pump (GSHP) systems efficiently heat and cool buildings using sustainable geothermal energy accessed by way of ..