Energy and exergy analysis of a ground source heat pump system with a slinky ground heat exchanger supported by nanofluid

Kapıcıoğlu, Abdullah

doi:10.1007/s10973-020-10498-0

Cited by 18 publications

(7 citation statements)

References 42 publications

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“…The mass flow rate of the fluid circulating in the system was kept at 0,450kg/s with the help of an inverter circulation pump. Heating experiments of the related experimental setup were previously carried out by Kapıcıoğlu [20]. The schematic view of the system is given in Figure 1.…”

Section: Methodsmentioning

confidence: 99%

Experimental Thermal Performance Analysis of Nanofluid Assisted Slinky Ground Heat Exchanger in Space Cooling Application

KAPICIOĞLU,

YÜKSEL

2023

Journal of Scientific Reports-A

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Ground source heat pump has made a severe breakthrough in space conditioning applications due to their high energy efficiency, and expectations for these systems have increased due to using renewable energy. Concerning the increasing expectation, researchers and engineers have increased their research on these systems and focused on cost and efficiency. The efficiency of the ground source heat pump system is directly related to the ground heat exchanger loop, which provides the thermal connection between the heat pump and the ground, and increasing the effectiveness of the ground heat exchanger can be achieved with a nanofluid-based heat transfer fluid. On the other hand, as a ground source heat pump system component, ground heat exchangers have very different design configurations. Among the various configurations, slinky ground heat exchangers are of great interest due to their higher heat transfer efficiency and reduced installation space requirements compared to traditional straight pipe configurations. In this study, the effect of nanofluids on increasing the effectiveness of slinky ground heat exchangers was experimentally investigated and compared with the results obtained using conventional heat transfer fluids. The results obtained from the experimental study determined that using nanofluid at a rate of 0.1% as a heat transfer fluid in slinky ground heat exchangers in cooling applications increased the average effectiveness by about 20%.

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Section: Methodsmentioning

confidence: 99%

Experimental Thermal Performance Analysis of Nanofluid Assisted Slinky Ground Heat Exchanger in Space Cooling Application

KAPICIOĞLU,

YÜKSEL

2023

Journal of Scientific Reports-A

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“…The data used in the study were obtained from a GSHP system installed in a region in the terrestrial climate zone of Turkey [47,48]. Energy parameters at the temperature points were calculated with reference to the data in the experimental study.…”

Section: Methodsmentioning

confidence: 99%

Toprak Kaynaklı Bir Isı Pompasında R410A’ya Alternatif Soğutucu Akışkanların ASHRAE Sınıflandırmasına Göre Teorik Olarak İncelenmesi

Kapıcıoğlu

2022

Adıyaman Üniversitesi Mühendislik Bilimleri Dergisi

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Today, environmental pollution and global warming have become global threats. The use of renewable energy sources is a rational approach to overcome this problem, and ground source heat pumps also play an important role in this approach. However, the refrigerants used in these systems often have global warming potential values above the specified norms. In this study, using the Engineering Equation Solver package program, the performance values and environmental effects of R410A alternative refrigerants were analyzed theoretically according to ASHRAE safety groups with the help of the data obtained from the experimental study. The results showed that the R32 increases the COP value by 3.1% and reduces the mass flow rate by nearly 35%. It has been calculated that R152a provides the most successful results in the study. R152a provided an 8.5% increase in COP compared to R410A. It has been observed that the operating costs of R452B, R454B and R454C, which are specified as alternative refrigerants by environmental protection agency, are higher than R410A. In the study, it was determined that the R454C has the lowest values in all respects. It has been calculated that using R32 instead of R410A reduces the CO2 equivalent emissions by approximately 2.54%.

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“…Exergy analysis relies on the irreversibility associated with heat transmission. The computation of exergy loss for a steady-state open system is conducted as outlined below [23,24]:…”

Section: Exergy Efficiencymentioning

confidence: 99%

Review of passive methods of heat transfer enhancement in helical tube heat exchanger

Marzouk,

Abou Al-Sood,

El-Said

et al. 2023

Journal of Contemporary Technology and Applied Engineering

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In contemporary times, Helical tube heat exchangers (HTHXs) have gained significant prominence in energy-related sectors, frequently finding application in industrial and technical settings. Their impact on overall system efficiency and size is substantial. A comprehensive review addressing passive methods of heat transfer enhancement in HTHXs is notably absent. This paper justifies its significance by providing a recent and systematic review of available passive methods. The passive approach offers advantages such as the absence of external power requirements and lower operational costs compared to active methods. Studies collectively indicate a noteworthy progression in heat transfer enhancement in HTHXs. The paper meticulously evaluates passive methods like fins, inserts, geometry modifications, and baffles, which collectively represent 18.7%, 22.3%, 42.2%, and 16.8% of research efforts, respectively. Both experimental and numerical studies focus on improving heat transfer in HTHXs. However, further exploration is necessary to understand the negative effects of pressure drop in tube-side flow. Future research should also prioritize the development of geometric designs for HTHX surfaces, potentially incorporating materials coatings to further enhance heat transfer. The authors present insightful issues and ideas that they estimate deserving of additional investigation in subsequent research endeavors.

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Energy and exergy analysis of a ground source heat pump system with a slinky ground heat exchanger supported by nanofluid

Cited by 18 publications

References 42 publications

Experimental Thermal Performance Analysis of Nanofluid Assisted Slinky Ground Heat Exchanger in Space Cooling Application

Experimental Thermal Performance Analysis of Nanofluid Assisted Slinky Ground Heat Exchanger in Space Cooling Application

Toprak Kaynaklı Bir Isı Pompasında R410A’ya Alternatif Soğutucu Akışkanların ASHRAE Sınıflandırmasına Göre Teorik Olarak İncelenmesi

Review of passive methods of heat transfer enhancement in helical tube heat exchanger

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