A review of the current status and development of 5GDHC and characterization of a novel shared energy system

Lindhe, Jonas; Javed, Saqib; Johansson, Dennis; Bagge, Hans

doi:10.1080/23744731.2022.2057111

Cited by 21 publications

(15 citation statements)

References 49 publications

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“…On the other hand, the current state of the literature focuses on the youth of the 5GDHC technology. Reviews on this topic emphasize the need for further development of design and simulation tools based on their application to real-case studies (Abugabbara et al, 2020;Lindhe et al, 2022).…”

Section: Heat Pump Performance Simulationmentioning

confidence: 99%

Seawater Opportunities to Increase Heating, Ventilation, and Air Conditioning System Efficiency in Buildings and Urban Resilience

Schibuola

Tambani²,

Buggin³

2022

Front. Energy Res.

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In coastal cities, seawater heat pumps (SWHPs) can combine heat pump technology with the availability of seawater to produce the heat and the cold necessary for heating, ventilation, and air conditioning (HVAC) systems installed in buildings. In heating mode, the seawater is used as a cold source and provides the low-temperature heat needed for the operation of the machine. In cooling mode, the seawater removes the heat dissipated by the condenser of the heat pump working for air conditioning. This seawater application seems to be very promising since the temperature trend of the seawater appears to be more favorable than the alternative use of outdoor air, both in winter and in summer. In a case study in Trieste, the performance of a district heating/cooling network supplied with seawater and based on decentralized heat pumps is investigated. For this purpose, annual dynamic simulations were performed, modeling an urban area, the heat pumps, and the network. The energy efficiency evaluation shows a clear superiority of the SWHP solution compared to boilers and airsource heat pumps and thus the possibility to provide a significant contribution to the decarbonization of buildings. Moreover, the results highlight the ability of this GWHP network to reduce the urban heat island (UHI) phenomenon since the heat dissipated by the heat pumps during summer air conditioning is removed from the urban area. Therefore, SWHPs in coastal cities can be among the mitigation measures for UHI to increase outdoor comfort and heat wave resilience in urban areas.

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Section: Heat Pump Performance Simulationmentioning

confidence: 99%

Seawater Opportunities to Increase Heating, Ventilation, and Air Conditioning System Efficiency in Buildings and Urban Resilience

Schibuola

Tambani²,

Buggin³

2022

Front. Energy Res.

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“…Consequently, distributing hundreds of thousands of individual ASHPs in Denmark to areas where DH is not possible could have serious ramifications for the magnitude of the investments in the power grid necessary for supplying these future peak loads. A novel alternative to individual heat pumps has been introduced in recent years with the emergence of 5th-generation district heating and cooling (5GDHC) grids, where distributed GSHPs connect to a network of uninsulated pipes and extract and store energy in the shallow subsurface, typically between 0 and 200 m depth [14][15][16]. The introduction of 5GDHC exemplifies successful integration in the energy sector by advancing direct electrification of prosumer-based circular, efficient, and renewable heating and cooling grids, and constitutes one of several promising strategies to address the pressing issue of climate change [16].…”

Section: Introductionmentioning

confidence: 99%

“…A novel alternative to individual heat pumps has been introduced in recent years with the emergence of 5th-generation district heating and cooling (5GDHC) grids, where distributed GSHPs connect to a network of uninsulated pipes and extract and store energy in the shallow subsurface, typically between 0 and 200 m depth [14][15][16]. The introduction of 5GDHC exemplifies successful integration in the energy sector by advancing direct electrification of prosumer-based circular, efficient, and renewable heating and cooling grids, and constitutes one of several promising strategies to address the pressing issue of climate change [16]. Integration across different sectors such as groundwater, heating and cooling, electricity, wastewater, etc., by means of multifunctional supply and utility systems potentially holds additional efficiency gains and decarbonization possibilities [17,18].…”

Section: Introductionmentioning

confidence: 99%

Full-Scale Demonstration of Combined Ground Source Heating and Sustainable Urban Drainage in Roadbeds

Poulsen¹,

Andersen²,

Tordrup³

2022

Energies

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This paper proposes and demonstrates, in full scale, a novel type of energy geostructure (“the Climate Road”) that combines a ground-source heat pump (GSHP) with a sustainable urban drainage system (SUDS) by utilizing the gravel roadbed simultaneously as an energy source and a rainwater retarding basin. The Climate Road measures 50 m × 8 m × 1 m (length, width, depth, respectively) and has 800 m of geothermal piping embedded in the roadbed, serving as the heat collector for a GSHP that supplies a nearby kindergarten with domestic hot water and space heating. Model analysis of operational data from 2018–2021 indicates sustainable annual heat production levels of around 0.6 MWh per meter road, with a COP of 2.9–3.1. The continued infiltration of rainwater into the roadbed increases the amount of extractable heat by an estimated 17% compared to the case of zero infiltration. Using the developed model for scenario analysis, we find that draining rainwater from three single-family houses and storing 30% of the annual heating consumption in the roadbed increases the predicted extractable energy by 56% compared to zero infiltration with no seasonal energy storage. The Climate Road is capable of supplying three new single-family houses with heating, cooling, and rainwater management year-round.

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“…Ground source heat pumps (GSHP) are efficient relative to air source heat pumps (ASHP) and are also able to supply direct/passive cooling due to the constant and low temperature of the ground [5][6][7][8]. The utilization of shallow geothermal energy has gained further interest with the emergence of 5th generation district heating and cooling (5GDHC) grids with distributed ground source heat pumps that extract and store energy in the shallow subsurface typically between 0 and 200 m depth [9][10][11]. The introduction of 5GDHC exemplifies successful integration in the energy sector, by advancing direct electrification of prosumer-based circular, efficient and renewable heating and cooling grids, and constitutes one of several promising strategies to address the pressing issue of climate change [11].…”

Section: Introductionmentioning

confidence: 99%

“…The utilization of shallow geothermal energy has gained further interest with the emergence of 5th generation district heating and cooling (5GDHC) grids with distributed ground source heat pumps that extract and store energy in the shallow subsurface typically between 0 and 200 m depth [9][10][11]. The introduction of 5GDHC exemplifies successful integration in the energy sector, by advancing direct electrification of prosumer-based circular, efficient and renewable heating and cooling grids, and constitutes one of several promising strategies to address the pressing issue of climate change [11]. Integration across different sectors such as groundwater, heating and cooling, electricity, wastewater etc.…”

Section: Introductionmentioning

confidence: 99%

Full-Scale Demonstration of Combined Ground Source Heating and Sustainable Urban Drainage in Roadbeds

Poulsen¹,

Andersen²,

Tordrup³

2022

Preprint

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This paper proposes and demonstrates, in full scale, a novel type of energy geostructure (“the Climate Road”) that combines a ground source heat pump (GSHP) with a sustainable urban drainage system (SUDS) by utilizing the gravel roadbed simultaneously as energy source and rainwater retarding basin. The Climate Road measures 50m x 8m x 1m (length, width, depth) and has 800 m of geothermal piping embedded in the roadbed, serving as the heat collector for a GSHP that supplies a nearby kindergarten with domestic hot water and space heating. Model analysis of operational data from 2018-2021 indicates sustainable annual heat production levels around 0.6 MWh per meter road, with a COP of 2.9-3.1. The continued infiltration of rainwater to the roadbed increases the amount of extractable heat by an estimated 17% compared to the case of zero infiltration. Using the developed model for scenario analysis we find that draining rainwater from three single family houses and storing 30% of the annual heating consumption in the roadbed, increases the predicted extractable energy by 56% compared to zero infiltration with no seasonal energy storage. The Climate Road is capable of supplying three single family houses with heating, cooling and rainwater management year-round.

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A review of the current status and development of 5GDHC and characterization of a novel shared energy system

Cited by 21 publications

References 49 publications

Seawater Opportunities to Increase Heating, Ventilation, and Air Conditioning System Efficiency in Buildings and Urban Resilience

Seawater Opportunities to Increase Heating, Ventilation, and Air Conditioning System Efficiency in Buildings and Urban Resilience

Full-Scale Demonstration of Combined Ground Source Heating and Sustainable Urban Drainage in Roadbeds

Full-Scale Demonstration of Combined Ground Source Heating and Sustainable Urban Drainage in Roadbeds

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