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

Piotrowska-Woroniak, J.

doi:10.3390/en14164793

Cited by 8 publications

(9 citation statements)

References 81 publications

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“…The calculation assumes a constant ground temperature equal to the annual average outside air temperature for Warsaw 7.6°C. 16…”

Section: Analysis Of the Energy Consumption Of A Heat Source In A Sur...mentioning

confidence: 99%

“…The calculation assumes a constant ground temperature equal to the annual average outside air temperature for Warsaw 7.6°C. 16 The absence of radiant panels results in a lower heat output of the floor heating, which in turn requires a higher supply temperature in the heating system to cover the required heat output. On the basis of equations ( 4)-( 9), the required supply water temperature was calculated if the required floor heating output was 60 W/m 2 (Table 2).…”

Section: Analysis Of the Thermal Performance Of Low-height Floor Heat...mentioning

confidence: 99%

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Assessment of the validity of using a radiant panel in the low-height floor heating

Werner-Juszczuk,

Siuta-Olcha

2024

Building Services Engineering Research and Technology

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This paper examines the viability of using a radiant panel in lightweight low-height floor heating. In this structure, a dry screed with high thermal resistance is replaced by a low-resistance adhesive layer with reinforcement mesh. The absence of the radiant panel results in a reduction in heat output of 5%–17% for floor finishes with a thermal resistance of 0.001 m2K/W, 50%–54% for 0.05 m2K/W and 60%–62% for 0.1 m2K/W. A structure with a panel is characterised by a lower surface temperature amplitude (maximum 2.4 K) compared to a structure without it (8.8 K), which improves the comfort of floor users. The annual heating cost in a building equipped with the analysed structures was determined. The absence of the panel resulted in a cost increase of 13%, 37% and 79% for floor finish resistances of 0.001, 0.05 and 0.1 m2K/W, respectively. The SPBT for the purchase of radiant panels is 40 years for a floor resistance of 0.001 m2K/W, demonstrating the unprofitability of this solution. For resistances of 0.05 and 0.1 m2K/W, SPBT was 14 and 6 years, respectively. The choice of floor heating system should take into account the required heat output, thermal comfort and economic aspects. Practical application This paper assesses the validity of using radiant panels in a low-height floor heating structure, where the dry screed layer is replaced by an adhesive layer with reinforcement mesh. This structure is gaining popularity due to its quick installation and low height but has the disadvantage of the high panel cost. The paper evaluates the effect of panels on heat output and identifies the conditions under which their use is economically justified. Recipients of results are designers and contractors of heating systems. The recommendations can be the basis for selecting the optimum design solution for a lightweight floor heating system.

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“…The calculation assumes a constant ground temperature equal to the annual average outside air temperature for Warsaw 7.6°C. 16…”

Section: Analysis Of the Energy Consumption Of A Heat Source In A Sur...mentioning

confidence: 99%

Section: Analysis Of the Thermal Performance Of Low-height Floor Heat...mentioning

confidence: 99%

Assessment of the validity of using a radiant panel in the low-height floor heating

Werner-Juszczuk,

Siuta-Olcha

2024

Building Services Engineering Research and Technology

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“…On the other hand, in building B, a second individual source was designed. A single-function heat substation was foreseen, cooperating with brine-water heat pumps and vertical ground heat exchangers [45,46].…”

Section: Nomentioning

confidence: 99%

Energy and Economic Efficiency of the Thermomodernization of an Educational Building and Reduction of Pollutant Emissions—A Case Study

et al. 2022

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The study presents an investigation of thermal energy consumption for heating in an educational building located in the north-eastern part of Poland in 2017–2020, after deep thermomodernization. An evaluation of the actual energy effects was made based on measurements carried out over a 4-year operational period. They were compared with the results of theoretical calculations included in the energy audit and an attempt was made to describe the reasons for the discrepancies. The planned and achieved economic efficiency indicators were assessed and the amount of reduction of pollutant emissions was determined. The performed analysis allowed for an assessment of the impact of deep thermomodernization in terms of reducing heat energy consumption for central heating purposes, as well as reducing greenhouse gas emissions such as CO2, SOx, NOx and benzo(a)pyrene to the atmosphere. The implementation of thermomodernization in buildings led to savings of about 43% in terms of heat energy consumption for heating and a reduction in pollutant emissions. The theoretical savings based on the audit were 50.4%. The obtained results show that deep thermomodernization contributes to the improvement of energy and ecological efficiency in educational buildings, however, without the possibility of using subsidies, the investment is unprofitable. All the obtained results were discussed with the available literature sources and have been summarized with appropriate conclusions.

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“…The implementation of advanced thermal modernization contributes to substantial reductions in greenhouse gas emissions [51] and, combined with the use of advanced control systems in heating systems [52], leads to possible can-do use of renewable energy sources for building heating [53]. However, caution should be exercised if key operating parameters of the system are not well defined (such as the thermal conductivity of the ground) [54]. It leads to worse plant operating conditions, longer electric motor operating hours, and increased pollutant emissions, especially in a country like Poland that burns coal to generate electricity.…”

Section: Introductionmentioning

confidence: 99%

Analysis of the Hybrid Power-Heating System in a Single-Family Building, along with Ecological Aspects of the Operation

Woroniak,

Piotrowska-Woroniak,

Woroniak

et al. 2024

Energies

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This study evaluates a hybrid heating system in a single-family building in northeastern Poland, which has a temperate continental climate. The analysis covers two heating seasons in 2021/2022 and 2022/2023. The hybrid heating system includes an air heat pump HPA–08 CS Plus with a heating power of 8.2 kW (AHP), a condensing gas boiler VC146/5–5 with a power of 14 kW (GB–Condens.), and a solid fuel boiler with a power of 11 kW for central heating. Additionally, hot water is heated by a Basic 270 (DHW’s AHP) air–water heat pump with a power of 2 kW, utilizing a tank with a capacity of 270 dm3 equipped with two heating coils. The building’s average electricity consumption is around 5400 kWh/year. A 4.96 kWp photovoltaic installation is installed on the building’s roof at a 40° angle towards the south to supplement the hybrid system. The study aims to assess whether the PV installation can adequately cover the energy needs of the hybrid heat source for heating and hot water. Furthermore, the study calculates the emission of pollutants (CO2, SOx, NOx, CO, and PM10) into the atmosphere. The total annual electricity production from PV installations was 5444.9 kWh in 2021/2022 and 5684.8 kWh in 2022/2023. The excess electricity was stored in the PGE power grid as per the Prosumer settlement rules. The installed PV installation is sufficient to power the following devices annually: AHP, DHW’s AHP, and GB–Condens. However, the daily electricity production from the PV installation is not enough to cover the energy needs of the heat pump for heating during the cold months in Poland (I–III, XI–XII). It can meet the power needs of a PC all year round and can also be stored during the summer months, for example, in energy warehouses or by directly storing it in the PGE power grid. The use of the PV installation resulted in an average reduction in pollutant emissions into the atmosphere: CO2—94.1%, SOx—91.8%, NOx—95.6%, CO—9.7%, and PM10—32.1%.

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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)

Cited by 8 publications

References 81 publications

Assessment of the validity of using a radiant panel in the low-height floor heating

Assessment of the validity of using a radiant panel in the low-height floor heating

Energy and Economic Efficiency of the Thermomodernization of an Educational Building and Reduction of Pollutant Emissions—A Case Study

Analysis of the Hybrid Power-Heating System in a Single-Family Building, along with Ecological Aspects of the Operation

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