Energy and temperature performance analysis of geothermal (ground source) heat pumps integrated with permeable pavement systems for urban run-off reuse

Tota-Maharaj, Kiran; Grabowiecki, Piotr; Scholz, Miklas

doi:10.1080/19397030903151296

Cited by 16 publications

(10 citation statements)

References 67 publications

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“…As a result of the strong variability of the chosen pollutants, the standard deviations for suspended solids were 151.3 mg/L and 190.9 mg/L for the inflow water with and without additional pollutants (dog faeces), respectively. Gully pots on the roadside where sampling occurred linked the surface runoff the continuous inflow of solids into roadside gully pots leads to gradual silting and a high varying suspended and total solids content [13,18]. Similar observations were made for biological oxygen demand (especially with the addition of dog faeces, IN + P) and conductivity.…”

Section: Inflow Water Qualitysupporting

confidence: 65%

Sustainable Approaches for Stormwater Quality Improvements with Experimental Geothermal Paving Systems

Tota-Maharaj

Paul

2015

Sustainability

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This research assesses the next generation of permeable pavement systems (PPS) incorporating ground source heat pumps (geothermal paving systems). Twelve experimental pilot-scaled pavement systems were assessed for its stormwater treatability in Edinburgh, UK. The relatively high variability of temperatures during the heating and cooling cycle of a ground source heat pump system embedded into the pavement structure did not allow the ecological risk of pathogenic microbial expansion and survival. Carbon dioxide monitoring indicated relatively high microbial activity on a geotextile layer and within the pavement structure. Anaerobic degradation processes were concentrated around the geotextile zone, where carbon dioxide concentrations reached up to 2000 ppm. The overall water treatment potential was high with up to 99% biochemical oxygen demand removal. The pervious pavement systems reduced the ecological risk of stormwater discharges and provided a low risk of pathogen growth.

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Section: Inflow Water Qualitysupporting

confidence: 65%

Sustainable Approaches for Stormwater Quality Improvements with Experimental Geothermal Paving Systems

Tota-Maharaj

Paul

2015

Sustainability

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“…The COP value was fairly stable at around 3 during the project period, which is higher than for other similar research demonstration projects in which GSHP and SUDS have been combined. For example, Tota-Maharaj et al [34] found COP values between 2.3 and 4.5 for their indoor rigs, and between 1.5 and 4.5 for their outdoor rigs, whereas Charlesworth et al [24] found a mean COP value of 1.8. The predominant reason for the higher COP values in this investigation is most likely the higher capacity of GSHP in the Climate Road, with 800 m of geothermal pipe heat exchangers, the continuous infiltration of water to the pipes and the depth of the GSHP pipes (0.5 and 1.0 m, respectively).…”

Section: Energy Productionmentioning

confidence: 99%

The Climate Road—A Multifunctional Full-Scale Demonstration Road That Prevents Flooding and Produces Green Energy

Andersen¹,

Poulsen²,

Tordrup³

2022

Water

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This paper presents a multifunctional full-scale demonstration road, the Climate Road, which combines climate adaptation and mitigation in a single system. The Climate Road is located at Hedensted, Denmark and is 50 m long and 8 m wide, and the depth of the roadbed is 1 m. Half of the Climate Road, i.e., 25 m, is paved with permeable asphalt and the remaining 25 m with traditional asphalt. All surface water drains into the roadbed, which stores up to 120 m3 of water, either directly through the permeable asphalt or by drain grates. In addition, 800 m of geothermal pipes are embedded in the roadbed, distributed over four 200 m w-loops, two buried 1 m below the asphalt and two similar loops at 0.5 m depth. The Climate Road was tested from May 2019 to May 2021. In the project period, a total precipitation value of 1654 mm was recorded, the mean temperature was 9.3 °C and the most intense rainfall was 40.3 mm/30 min. The long-term infiltration performance of the permeable asphalt shows that the overall infiltration capacity slowly reduces. The reduction can be hindered, but not completely prevented, with annual restorative cleaning. After two years of operation, the Climate Road still, by a large margin, fulfils the recommendations of the infiltration capacity of 97.2 mm/h for the vast majority of the road section. The total volume reduction capacity is estimated to be between 15 and 30%. Based on an analysis of 61 single rain events, the event detention time is found to range between 10 and 130 min, with an average of 35 min. During the project period, the Climate Road produced a total of 98 MWh for a nearby kindergarten, with an average coefficient of performance (COP) of 3.1.

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“…Rainwater harvesting using permeable pavements has enhanced the Sustainable Urban Drainage System techniques with energy applications before rainwater is reused, by introducing GSHP systems . Many researches have demonstrated the potential of integrating permeable pavements with GSHP and underground water storage to reduce runoff peaks, store water, treat pollutants, lower heat island effect, and harvest energy from the heated pavement. Tota‐Maharaj and Scholz presented effective application of ANN for analyzing the performance of combined permeable pavement and GSHP system.…”

Section: Technologies Of Energy Harvesting From Pavements and Roadwaysmentioning

confidence: 99%

Energy harvesting from pavements and roadways: A comprehensive review of technologies, materials, and challenges

2019

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Summary Energy harvesting from pavements has been a topic of extensive research in the recent past. This domain has attracted not only the research community but also the industry and governmental authorities. The various sources exploited for energy harvesting from pavements and roadways are solar radiation, mechanical energy dissipated due to moving vehicles and pedestrians, geothermal energy, rainwater, and wind. This article presents an exhaustive and updated review of all potential means of energy harvesting from these sources. Following the introductory section, the article sequentially covers the energy harvesting methods and their research progress, materials, development of practical systems, commercial status, comparison of technologies, challenges, and concluding remarks. This study reveals that there is wide scope for further research and feasibility studies, which could lead to a wide‐spread implementation of the various technologies for energy harvesting from pavements and roads.

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Energy and temperature performance analysis of geothermal (ground source) heat pumps integrated with permeable pavement systems for urban run-off reuse

Abstract: Who helped me with undergraduate course preparations and discussed various important scholarly issues with me.

Cited by 16 publications

References 67 publications

Sustainable Approaches for Stormwater Quality Improvements with Experimental Geothermal Paving Systems

Sustainable Approaches for Stormwater Quality Improvements with Experimental Geothermal Paving Systems

The Climate Road—A Multifunctional Full-Scale Demonstration Road That Prevents Flooding and Produces Green Energy

Energy harvesting from pavements and roadways: A comprehensive review of technologies, materials, and challenges

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