A PCM Thermal Storage for Ground-source Heat Pumps: Simulating the System Performance via CFD Approach

Bonamente, E.; Aquino, Andrea; Cotana, Franco

doi:10.1016/j.egypro.2016.11.147

Cited by 29 publications

(11 citation statements)

References 14 publications

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“…The improved scenario of the present work uses the same electric auxiliary devices of the storage scenario, which is oversized when the cylindrical exchangers are removed and only one BH is used. As reported in a previous analysis [15], an optimal scenario could be foreseen, providing a complete upgrade of the existing prototype by removing the cylindrical exchangers and using a smaller circulating pump. This produces a sensible increase of the system COP: 4.28 for the heating mode and 6.00 for the cooling mode.…”

Section: Resultsmentioning

confidence: 99%

“…During the working period, the prototype switched between the conventional and the alternative mode, allowing for the calculation of the COP related to the storage and baseline scenarios. The COP for the improved scenario was calculated using CFD simulations validated against the measured date [15]. The annual thermal energy required by the building for each scenario was set at the value measured in Table 2.…”

Section: Life-cycle Inventorymentioning

confidence: 99%

“…The system lifetime is conservatively estimated to be 20 years, and impacts from infrastructures and machineries are allocated using this time period. The environmental impact of the GSHP prototype is evaluated for three cases: a baseline scenario was set up considering the conventional layout (three BHs and no TS); a storage scenario included the underground TES coupled with a single BH; an improved scenario was set up considering a potential system upgrade where heat exchangers are removed [15]. A fourth scenario, derived from the same previous work [15], was also used for a comparison of the final results and showing the Energies 2017, 10, 1854 5 of 10 potential of the system.…”

Section: Goal Of the Analysismentioning

confidence: 99%

“…The present LCA, following the methodology regulated by the ISO 14044 [15] and 14040 [17] international standards, is dedicated to the evaluation of the environmental sustainability of the TES GSHP prototype considering impacts from the infrastructure construction and assembly and from energy consumption during the use phase on an annual basis. The system lifetime is conservatively estimated to be 20 years, and impacts from infrastructures and machineries are allocated using this time period.…”

Section: Goal Of the Analysismentioning

confidence: 99%

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Life-Cycle Assessment of an Innovative Ground-Source Heat Pump System with Upstream Thermal Storage

Bonamente

Aquino

2017

Energies

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An innovative space-conditioning system is proposed and a life-cycle assessment (LCA) is presented. The layout is obtained starting from a ground-source heat pump system (GSHP) and includes upstream thermal storage (TS). A prototype of the system, implemented following this new approach, is currently in use for space heating and cooling of an industrial building. As a result of the TS designed to decouple the geothermal side from the heat-pump side, the system is able to provide the required thermal energy to the building with a reduced-size geothermal installation (i.e., shorter/fewer boreholes (BHs)). The performance was monitored for over 2 years, both in cooling and heating modes. A LCA study of this system is performed on the basis of specific data for implementation and operation phases. The results are given in terms of the comprehensive ReCiPe midpoint and endpoint indicator suite and are compared with literature studies of other conventional technologies for space conditioning.

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Section: Resultsmentioning

confidence: 99%

Section: Life-cycle Inventorymentioning

confidence: 99%

Section: Goal Of the Analysismentioning

confidence: 99%

Section: Goal Of the Analysismentioning

confidence: 99%

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Life-Cycle Assessment of an Innovative Ground-Source Heat Pump System with Upstream Thermal Storage

Bonamente

Aquino

2017

Energies

Self Cite

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“…GSHP is considered a renewable technology since it has the potential to reduce the energy consumption needed for heating and cooling and hence reduce emission of greenhouse gases. The production of low‐temperature geothermal energy from GSHPs has shown an increasing trend in the last decade . GSHP is based on the fact that soil temperature undergoes much lesser temperature fluctuations than that experienced by the surrounding air…”

Section: Introductionmentioning

confidence: 99%

Laboratory investigation on the use of thermally enhanced phase change material to improve the performance of borehole heat exchangers for ground source heat pumps

2019

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Summary Ground source heat pumps have high efficiency and high capital cost primarily due to borehole drillings. This research investigates the inclusion of high‐conductivity phase change material (PCM) in the borehole heat exchanger of a ground source heat pump to reduce the borehole length required and improve its coefficient of performance (COP). In the laboratory model, the borehole heat exchanger was represented by a cylindrical electrical heater having a total power of 9.216 W, operating for 1 hour while resting for 3 hours. Surrounding the heater in the annular region, either soil, PCM, or high‐conductivity PCM was used as grouting material. The annular region was surrounded by a large amount of soil enclosed in a large bin as a representation of ground soil. The high‐conductivity graphite was impregnated with the commercial PCM “PureTemp29.” Results from the experiments revealed that the PCM is able to decrease the temperature fluctuations in the annular and soil regions, while graphite increases the thermal conductivity of the annular region and hence increases the rate of heat dissipation from the heater to the soil surrounding it. The maximum COP values of a ground source heat pump calculated assuming ideal reversed Carnot cycle for cooling mode showed an increase of approximately 81% with PCM and by 112% with graphite‐enhanced PCM.

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A review on potentials of coupling PCM storage modules to heat pipes and heat pumps

Rashidi¹,

Shamsabadi²,

Esfahani³

et al. 2019

J Therm Anal Calorim

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A PCM Thermal Storage for Ground-source Heat Pumps: Simulating the System Performance via CFD Approach

Cited by 29 publications

References 14 publications

Life-Cycle Assessment of an Innovative Ground-Source Heat Pump System with Upstream Thermal Storage

Life-Cycle Assessment of an Innovative Ground-Source Heat Pump System with Upstream Thermal Storage

Laboratory investigation on the use of thermally enhanced phase change material to improve the performance of borehole heat exchangers for ground source heat pumps

A review on potentials of coupling PCM storage modules to heat pipes and heat pumps

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