Analysis of a Vertical Ground Heat Exchanger Operation Cooperating with a Heat Pump

Joanna Beata Piotrowska-Woroniak

Abstract

The article presents the results of the changes measurements in the temperature distribution of the lower heat source during operation of the brine-to-water type heat pump. The lower source for heat pumps with a heating capacity of 234.4 kW and cooling power of 191.8 kW installed in the building of the Bialystok University of Technology, Faculty of Civil and Environmental Engineering is a vertical ground heat exchanger with a total length of 5.200 m (52 wells of 100 m each). The results of tests carried out in the coldest months of the ground heat exchanger operation in north-eastern Poland in two heating seasons 2015–2016 are presented. Obtained measurements results in openings with working vertical probes in individual years of work were compared with the base profile of the soil to a depth of 100 m with unloaded operation of vertical ground heat probes of the same length. It also presents the amount of heat generated in this period by heat pumps and the amount of electricity consumed by it along with the heat pump performance factor (PF) in the next weeks of its operation. The average annual heat pump efficiency coefficient was also determined in two heating seasons. Due to the high costs of drilling wells and their measurement, this type of research is unique. There are practically no measurements of the temperature distribution in 100 m vertical ground probes loaded with heat pump operation in buildings in continuous operation. Computer simulations or smaller research stands are made more often
Author Joanna Beata Piotrowska-Woroniak (FCEE / HVAC)
Joanna Beata Piotrowska-Woroniak,,
- Heating, Ventilation, Air Conditioning Department (HVAC Department)
Pages587-601
Publication size in sheets0.7
Book Wróbel Marek, Jewiarz Marcin, Szlek Andrzej (eds.): Renewable Energy Sources: Engineering, Technology, Innovation , 2020, Springer, ISBN 978-3-030-13887-5, [978-3-030-13888-2], 1094 p., DOI:10.1007/978-3-030-13888-2
Keywords in EnglishVertical ground probes Heat pump Ground temperature distribution profile Brine temperature Coefficient of Performance (COP) Performance Factor (PF)
Internal identifierROC 19-20
Languageen angielski
Score (nominal)20
Score sourcepublisherList
ScoreMinisterial score = 20.0, 23-01-2020, ChapterFromConference
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