Determination of the Selected Wells Operational Power with Borehole Heat Exchangers Operating in Real Conditions, Based on Experimental Tests

Piotrowska-Woroniak, J.

doi:10.3390/en14092512

Cited by 8 publications

(14 citation statements)

References 67 publications

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“…[79]. The annual insolation was 1961.9 kWh/m 2 •year [80] and was higher than the insolation from the standard period 1991-2020, which is 1755.3 kWh/m 2 •year (Table 2). In the second zone, at a depth of 5 m to 12 m, ground temperature changes in individual months of the year are less intense than in the first layer.…”

Section: Resultsmentioning

confidence: 99%

“…The maximum well power determined during the tests using the TRT test was 3.54 kW, with the operating time of the compressors up to 2000 h/year. Experimental measurements in 2018 and 2019 showed that the tested BHE wells during their operation did not reach their maximum power of 3.54 kW, determined by the TRT test, and the operating time of heat pump compressors exceeded 2000 h/year [80].…”

Section: Experimental and Measuring Sitementioning

confidence: 99%

“…The borehole selected for analysis with the 100 m deep working BHE placed in it is one of 52 working wells [80]. The GSHP installation based on 52 BHEs is operated solely for heating purposes for the building of the Bialystok University of Technology.…”

Section: Experimental and Measuring Sitementioning

confidence: 99%

“…The land on which the BHE boreholes were drilled is covered with grass. At the design stage, each BHE assumed a flow of 0.852 m 3 /h [81], while the actual flows set on the rotameters during BHE operation are from 0.9 m 3 /h to 1.9 m 3 /h [80]. The maximum well power determined during the tests using the TRT test was 3.54 kW, with the operating time of the compressors up to 2000 h/year.…”

Section: Experimental and Measuring Sitementioning

confidence: 99%

“…The ground thermal conductivity coefficient, in accordance with the ground profile presented in Table 4, is λ = 1.76 W/(m•K) ± 0.03 W/(m•K). This coefficient was determined on the basis of the TRT test performed by an external company [80,81], it covers all ground layers.…”

Section: Ground Profilementioning

confidence: 99%

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Assessment of Ground Regeneration around Borehole Heat Exchangers between Heating Seasons in Cold Climates: A Case Study in Bialystok (NE, Poland)

Piotrowska-Woroniak

2021

Energies

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Based on the experimental studies, the process of ground regeneration around the borehole loaded with brine-water heat pumps working exclusively for heating purposes in the period of four consecutive heating seasons in a cold climate was presented. The research was conducted in north-eastern Poland. The aim of the work is to verify the phenomenon of thermal ground regeneration in the period between heating seasons on the basis of the recorded data and to check whether the ground is able to regenerate itself and at what rate. It was noticed that the ground does not fully regenerate, especially during heating seasons with lower temperatures. In the analyzed period, from 22 September 2016 to 12 October 2020, the ground probably cooled irreversibly by 1.5 °C. In order to illustrate and evaluate the speed of changes in the ground, the one’s profile with an undisturbed temperature field was presented for each month of the year. The presented results can be a very important source of information for the analysis of geothermal conditions occurring in the ground. They can be used to verify mathematical models and conduct long-term simulations that allow us to see the complexity of the processes taking place in the ground.

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Section: Resultsmentioning

confidence: 99%

Section: Experimental and Measuring Sitementioning

confidence: 99%

Section: Experimental and Measuring Sitementioning

confidence: 99%

Section: Experimental and Measuring Sitementioning

confidence: 99%

Section: Ground Profilementioning

confidence: 99%

See 3 more Smart Citations

Assessment of Ground Regeneration around Borehole Heat Exchangers between Heating Seasons in Cold Climates: A Case Study in Bialystok (NE, Poland)

Piotrowska-Woroniak

2021

Energies

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The Geobattery Concept: A Geothermal Circular Heat Network for the Sustainable Development of Near Surface Low Enthalpy Geothermal Energy to Decarbonise Heating

Fraser-Harris¹,

McDermott²,

Receveur³

et al. 2022

Earth Sci. Syst. Soc.

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Decarbonisation of heating represents a major challenge in efforts to reach Net Zero carbon emissions, especially for countries that rely heavily on the combustion of carbon-based fossil fuels to meet heating demand such as the United Kingdom. In this paper we explore the use of near surface low enthalpy geothermal energy accessed via commercial and domestic heat pump technology. These resources may become increasingly important in decarbonisation efforts but, while they are renewable, their sustainability is contingent on appropriate management. Here, we introduce a new geothermal circular heat network concept, known as a “geobattery,” which redistributes recyclable heat from emitters to users via elevated permeability pathways in the subsurface and offers a platform to manage shallow geothermal resources. If successfully implemented the concept has the potential to provide low carbon, resilient, low-cost heating that is sustainable both in terms of heat pump performance and the shallow geothermal resource. We demonstrate the concept based on the cooling requirements of a case study data centre with existing high energy use and the potential to inject the generated heat into elevated permeability pathways in the shallow subsurface. We show that thermal recharge under these conditions has the potential to arrest subsurface temperature declines associated with closely spaced borehole heat exchangers, ensure the long-term sustainability of shallow geothermal resources for generations to come, and play an important role in the decarbonisation of heating.

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The Impact of Thermo-Modernization and Forecast Regulation on the Reduction of Thermal Energy Consumption and Reduction of Pollutant Emissions into the Atmosphere on the Example of Prefabricated Buildings

et al. 2022

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The paper presents an assessment of thermal energy consumption for heating in 10 buildings made in the OWT-67N prefabricated large-panel technology from 1983 to 1986. The work covers the years 2002–2020 in three periods: before and after thermal modernization and after the use of an innovative weather prediction heating system control in buildings. The analysis made it possible to assess the impact of carrying out a deep thermal modernization, and then installing a modern forecast regulation system in terms of reducing heat energy consumption for central heating purposes, as well as reducing greenhouse gas emissions, such as CO2, SOx, NOx, CO and benzo(a)pyrene, into the atmosphere. The implementation of deep thermal modernization in buildings allowed for savings of 19.8–35% of thermal energy consumption for heating. The use of additional regulation based on prediction saved from 4.8 to 23.5%, except for one building BU10, where there was an increase in final energy consumption by 2.1%. Replacing the weather regulation in heating stations with the forecast regulation additionally reduced the emission of pollutants by 11.1%, compared to the reduction of pollutants achieved as a result of the thermal modernization of buildings alone, amounting to an average of 29.7%.

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Determination of the Selected Wells Operational Power with Borehole Heat Exchangers Operating in Real Conditions, Based on Experimental Tests

Cited by 8 publications

References 67 publications

Assessment of Ground Regeneration around Borehole Heat Exchangers between Heating Seasons in Cold Climates: A Case Study in Bialystok (NE, Poland)

Assessment of Ground Regeneration around Borehole Heat Exchangers between Heating Seasons in Cold Climates: A Case Study in Bialystok (NE, Poland)

The Geobattery Concept: A Geothermal Circular Heat Network for the Sustainable Development of Near Surface Low Enthalpy Geothermal Energy to Decarbonise Heating

The Impact of Thermo-Modernization and Forecast Regulation on the Reduction of Thermal Energy Consumption and Reduction of Pollutant Emissions into the Atmosphere on the Example of Prefabricated Buildings

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