Computational and experimental performance analysis of a novel method for heating of domestic hot water with a ground source heat pump system

Tuomo Niemelä, Mika Manner, Ari Laitinen, Timo Mikael Sivula, Juha Jokisalo, Risto Kosonen

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

The paper presents a novel method developed for energy efficient heating of domestic hot water (DHW) with a ground source heat pump (GSHP) system. The method is based on step-based heating of DHW, where the DHW is gradually heated from the inlet temperature of domestic cold water to the target temperature of DHW using a specifically designed GSHP system concept. The developed method was tested and validated using experimental and computational performance analyses and the energy efficiency, operation and potential limitations of the developed application were also studied in existing apartment buildings. To demonstrate the efficiency of the developed application, the performance of the new concept was compared to the performance of a conventionally used GSHP system. The results demonstrated that the developed GSHP concept delivered up to 45–50% improvement in energy efficiency of the DHW heating process over the conventional GSHP application. The measured Seasonal Performance Factors were 2.5–2.6 for the conventional application and as high as 3.7–3.8 for the developed application, when DHW was heated from 7.5 °C to 55 °C. The case study demonstrated that the developed concept is also well applicable in existing buildings, but there is still room for improvement.

Original languageEnglish
Pages (from-to)22-40
Number of pages19
JournalEnergy and Buildings
Volume161
DOIs
Publication statusPublished - 15 Feb 2018
MoE publication typeA1 Journal article-refereed

Fingerprint

Geothermal heat pumps
Heat pump systems
Heating
Water
Energy efficiency
Hot water heating
Temperature

Keywords

  • Apartment building
  • Domestic hot water
  • Energy efficiency
  • Geothermal energy
  • Ground source heat pump
  • Renewable energy source
  • Smart control

Cite this

Niemelä, Tuomo ; Manner, Mika ; Laitinen, Ari ; Sivula, Timo Mikael ; Jokisalo, Juha ; Kosonen, Risto. / Computational and experimental performance analysis of a novel method for heating of domestic hot water with a ground source heat pump system. In: Energy and Buildings. 2018 ; Vol. 161. pp. 22-40.
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abstract = "The paper presents a novel method developed for energy efficient heating of domestic hot water (DHW) with a ground source heat pump (GSHP) system. The method is based on step-based heating of DHW, where the DHW is gradually heated from the inlet temperature of domestic cold water to the target temperature of DHW using a specifically designed GSHP system concept. The developed method was tested and validated using experimental and computational performance analyses and the energy efficiency, operation and potential limitations of the developed application were also studied in existing apartment buildings. To demonstrate the efficiency of the developed application, the performance of the new concept was compared to the performance of a conventionally used GSHP system. The results demonstrated that the developed GSHP concept delivered up to 45–50{\%} improvement in energy efficiency of the DHW heating process over the conventional GSHP application. The measured Seasonal Performance Factors were 2.5–2.6 for the conventional application and as high as 3.7–3.8 for the developed application, when DHW was heated from 7.5 °C to 55 °C. The case study demonstrated that the developed concept is also well applicable in existing buildings, but there is still room for improvement.",
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Computational and experimental performance analysis of a novel method for heating of domestic hot water with a ground source heat pump system. / Niemelä, Tuomo; Manner, Mika; Laitinen, Ari; Sivula, Timo Mikael; Jokisalo, Juha; Kosonen, Risto.

In: Energy and Buildings, Vol. 161, 15.02.2018, p. 22-40.

Research output: Contribution to journalArticleScientificpeer-review

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