Long time performance analysis of ground source heat pump for space heating and cooling applications based on thermo-economic optimization criteria

Kayacı, Nurullah; Demir, Hakan

doi:10.1016/j.enbuild.2017.12.034

Cited by 23 publications

(11 citation statements)

References 17 publications

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“…The average temperature of the heat transfer fluid t from the linear HGHE was higher than that of Slinky HGHE and was almost identical to the average fluid temperature of the VGHE. The heat transfer fluid temperatures from the linear HGHE corresponded to the values presented by Kayaci and Demir [16]. The minimum t min , median t, and lower quartile Q 1 values were lower than for VGHE but higher than for Slinky HGHE.…”

Section: Temperatures Of the Heat Transfer Fluids Supplied To The Heasupporting

confidence: 73%

“…Mesaha et al [5] studied the changes of heat transfer fluid temperatures in VGHEs and pipe lengths during extraction and accumulation of heat in rock mass. Kayaci and Demir [16] developed a numerical model of prediction of input and output heat transfer fluid temperatures in HGHEs. The maximum deviations between the numerical and experimentally observed temperatures of the heat transfer fluids were 0.86 and 1.09 K. Ren et al [17] monitored output, extracted heat and heat transfer fluid temperatures in VGHEs with polyethylene and steel pipes.…”

Section: Introductionmentioning

confidence: 99%

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Analysis and Comparison of Some Low-Temperature Heat Sources for Heat Pumps

Neuberger

Adamovský

2019

Energies

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The efficiency of a heat pump energy system is significantly influenced by its low-temperature heat source. This paper presents the results of operational monitoring, analysis and comparison of heat transfer fluid temperatures, outputs and extracted energies at the most widely used low temperature heat sources within 218 days of a heating period. The monitoring involved horizontal ground heat exchangers (HGHEs) of linear and Slinky type, vertical ground heat exchangers (VGHEs) with single and double U-tube exchanger as well as the ambient air. The results of the verification indicated that it was not possible to specify clearly the most advantageous low-temperature heat source that meets the requirements of the efficiency of the heat pump operation. The highest average heat transfer fluid temperatures were achieved at linear HGHE (8.13 ± 4.50 °C) and double U-tube VGHE (8.13 ± 3.12 °C). The highest average specific heat output 59.97 ± 41.80 W/m2 and specific energy extracted from the ground mass 2723.40 ± 1785.58 kJ/m2·day were recorded at single U-tube VGHE. The lowest thermal resistance value of 0.07 K·m2/W, specifying the efficiency of the heat transfer process between the ground mass and the heat transfer fluid, was monitored at linear HGHE. The use of ambient air as a low-temperature heat pump source was considered to be the least advantageous in terms of its temperature parameters.

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Section: Temperatures Of the Heat Transfer Fluids Supplied To The Heasupporting

confidence: 73%

Section: Introductionmentioning

confidence: 99%

Analysis and Comparison of Some Low-Temperature Heat Sources for Heat Pumps

Neuberger

Adamovský

2019

Energies

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“…48 that the cooling/heating demand ratio varies from 0.66 to 3.45, and the cooling/heating ratio can be utilized to forecast the yearly expense. Kayaci and Demir [58] utilized the capital recovery factor (CRF) method to do the economic analysis in Turkey. The annual amount (A) is calculated by using the CRF at a constant interest rate expressed as:…”

Section: Dpp Approachmentioning

confidence: 99%

Techno-economic assessment of the horizontal geothermal heat pump systems: A comprehensive review

Cui

Zhu

Twaha

et al. 2019

Energy Conversion and Management

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Geothermal heat pump has been widely recognized as one of the promising technologies for building applications because of its high energy efficiency and low operating expense, however the high capital investment and installation costs discourage building owners to choose such a system. The horizontal geothermal heat pump system with reduced cost is a viable option that would be utilized widely, the aim of this paper is to catalogue and critique a range of effective approaches for the horizontal geothermal heat pump systems in different regions based on techno-economic assessment data. A ground heat exchanger is a vital component of the horizontal geothermal heat pump. The state-of-the-art analytical and numerical models of the linear-loop, slinky-coil and spiral-coil ground heat exchangers are generalized, in addition to their advantages and disadvantages. A large number of economic evaluation methods for analysing the financial performance of the horizontal geothermal heat pump system are presented. At the end, the standpoints, recommendations and potential future study on the horizontal geothermal heat pump system are deliberated.

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“…Numerical Study Nam et al [6] Development of a numerical model to predict heat exchange rates of a GSHP system Congedo et al [7] CFD simulations of horizontal GHXs, comparison of different configurations Dasare and Saha [8] Numerical study of horizontal GHX for high energy demand applications Oh et al [18] Performance analysis of a low-depth unit-type GHX using numerical simulation Yoon et al [14] Thermal efficiency evaluation and cost analysis of different types of GHXs in energy piles Gabrielli and Bottarelli [19] Financial and economic analysis of ground-coupled HP using shallow GHX Selamat et al [9] Numerical study of horizontal GHXs for design optimization through CFD simulation Habibi and Hakkaki-Fard [20] Evaluation and improvement of thermal performance of different types of horizontal GHXs based on techno-economic analysis Saeidi et al [21] Numerical simulation of a novel spiral type GHX for enhancing heat transfer performance of geothermal HP Kim and Nam [10] Development of performance prediction equation for a modular GHX Experimental Study Shonder et al [22] A new comparison of design methods for vertical GHXs for residential applications Esen et al [11] Energy and exergy analysis of a ground-coupled HP system with two horizontal GHXs Luo et al [12] Thermal performance and economic evaluation of double U-tube borehole heat exchanger with three different borehole diameters Yoon et al [23] Evaluation of thermal efficiency in different types of horizontal GHXs Luo et al [13] Thermo-economic analysis of four different types of GHXs in energy piles Sipio and Bertermann [15] Factors influencing thermal efficiency of horizontal GHXs Kayaci and Demir [24] Long time performance analysis of GSHPs for space heating and cooling applications based on thermo-economic optimization criteria Arif et al [16] GSHP with horizontal GHXs for space cooling in hot tropical climates Kim et al [17] Analysis on the effect of performance factor on GSHP system…”

Section: Year Author(s) Descriptionmentioning

confidence: 99%

Analysis of Heat Exchange Rate for Low-Depth Modular Ground Heat Exchanger through Real-Scale Experiment

Kim

Nam

et al. 2021

Energies

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A ground source heat pump system is a high-performance technology used for maintaining a stable underground temperature all year-round. However, the high costs for installation, such as for boring and drilling, is a drawback that prevents the system to be rapidly introduced into the market. This study proposes a modular ground heat exchanger (GHX) that can compensate for the disadvantages (such as high-boring/drilling costs) of the conventional vertical GHX. Through a real-scale experiment, a modular GHX was manufactured and buried at a depth of 4 m below ground level; the heat exchange rate and the change in underground temperatures during the GHX operation were tracked and calculated. The average heat exchanges rate was 78.98 W/m and 88.83 W/m during heating and cooling periods, respectively; the underground temperature decreased by 1.2 °C during heat extraction and increased by 4.4 °C during heat emission, with the heat pump (HP) working. The study showed that the modular GHX is a cost-effective alternative to the vertical GHX; further research is needed for application to actual small buildings.

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Long time performance analysis of ground source heat pump for space heating and cooling applications based on thermo-economic optimization criteria

Cited by 23 publications

References 17 publications

Analysis and Comparison of Some Low-Temperature Heat Sources for Heat Pumps

Analysis and Comparison of Some Low-Temperature Heat Sources for Heat Pumps

Techno-economic assessment of the horizontal geothermal heat pump systems: A comprehensive review

Analysis of Heat Exchange Rate for Low-Depth Modular Ground Heat Exchanger through Real-Scale Experiment

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