A numerical study into effects of soil compaction and heat storage on thermal performance of a Horizontal Ground Heat Exchanger

2021 ◽  
Author(s):  
F. Tang ◽  
M. Lahoori ◽  
H. Nowamooz ◽  
S. Rosin-Paumier ◽  
F. Masrouri
Keyword(s):  
Heat Exchanger ◽  
Thermal Performance ◽  
Soil Compaction ◽  
Heat Storage ◽  
Numerical Study ◽  
Ground Heat Exchanger

scholarly journals Small-scale lab analysis of the ground freezing effect on the thermal performance of a Flat-Panel ground heat exchanger

Geothermics ◽  
2018 ◽  
Vol 74 ◽  
pp. 247-254 ◽  
Author(s):  
Jingyu Cao ◽  
Michele Bottarelli ◽  
Marco Bortoloni ◽  
Gang Pei
Keyword(s):  
Heat Exchanger ◽  
Thermal Performance ◽  
Small Scale ◽  
Ground Heat Exchanger ◽  
Flat Panel ◽  
Ground Freezing

Numerical study of a crossflow heat exchanger to investigate thermal performance using nanofluids

2019 ◽  
Author(s):  
Jaed Al Nahian ◽  
Partha Pratim Pandit ◽  
Mohammad Arif Hasan Mamun
Keyword(s):  
Heat Exchanger ◽  
Thermal Performance ◽  
Numerical Study

scholarly journals NUMERICAL STUDY OF THE GEOMETRIC INFLUENCE OF A FIN IN A CYLINDRICAL HEAT EXCHANGER FOR MELTING OF PCM

2019 ◽  
Vol 18 (1) ◽  
pp. 78
Author(s):  
F. C. Spengler ◽  
B. Oliveira ◽  
R. C. Oliveski ◽  
L. A. O. Rocha
Keyword(s):  
Heat Exchanger ◽  
Aspect Ratio ◽  
Phase Change ◽  
Latent Heat ◽  
Heat Storage ◽  
Numerical Study ◽  
Melting Process ◽  
High Energy ◽  
High Energy Density ◽  
Melting Time

The thermal heat storage it’s an effective way to suit the energy availability with the demand schedule. It can be stored in the means of sensible or latent heat, the latter applying a material denominated Phase Change Material (PCM), which is provided as organic compounds, hydrated salts, paraffins, among others. The latent heat storage systems offer several advantages, like the practically isothermal process of loading and unloading and the high energy density. However, the low thermal conductivity makes the cycle prolonged on these systems, restricting its applicability. Applying computational fluid dynamics, the behavior of the PCM melting process was studied in cylindrical cavities with horizontal and vertical fins, aiming the optimization of the fin geometry. In this way the fin area was kept constant, varying its aspect ratio. The numerical model was validated with results from the literature and it’s composed of the continuity, momentum and energy equations increased by the phase change model. Qualitative and quantitative results are presented, referring to mesh independence, contours of velocity, net fraction and temperature at different moments of the process. The results of the study indicate that the position of the fin in the heat exchanger influences the melting process, although the vertical fins have a faster total melting process, horizontal fins can reach larger partial liquid fractions in less time in the heat exchanger. Such as the position of the fin, the increase of its length propitiates the reduction of the melting time, evidencing the optimal aspect ratio.

An Experimental Study on the Thermal Performance Evaluation of SCW Ground Heat Exchanger

2017 ◽  
Vol 25 (01) ◽  
pp. 1750006 ◽  
Author(s):  
Keun Sun Chang ◽  
Min Jun Kim ◽  
Young Jae Kim
Keyword(s):  
Thermal Conductivity ◽  
Performance Evaluation ◽  
Heat Exchanger ◽  
Effective Thermal Conductivity ◽  
Thermal Performance ◽  
Thermal Response ◽  
High Heat ◽  
Injection Rate ◽  
Operating Parameters ◽  
Ground Heat Exchanger

In recent years, application of the standing column well (SCW) ground heat exchanger (GHX) has been noticeably increased as a heat transfer mechanism of ground source heat pump (GSHP) systems with its high heat capacity and efficiency. Determination of the ground thermal properties is an important task for sizing and estimating cost of the GHX. In this study, an in situ thermal response test (TRT) is applied to the thermal performance evaluation of SCW. Two SCWs with different design configurations are installed in sequence to evaluate their effects on the thermal performance of SCW using a single borehole. A line source method is used to derive the effective thermal conductivity and borehole thermal resistance. Effects of operating parameters are also investigated including bleed, heat injection rate, flow rate and filler height. Results show that the effective thermal conductivity of top drawn SCW (Type A) is 11.7% higher than that of bottom drawn SCW (Type B) and of operating parameters tested bleed is the most significant one for the improvement of the thermal performance (40.4% enhanced in thermal conductivity with 10.9% bleed).

Thermal Performance Enhancement of an Industrial Shell and Tube Heat Exchanger

2015 ◽  
Author(s):  
Fadi A. Ghaith ◽  
Ahmed S. Izhar
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Coefficient ◽  
Heat Exchanger ◽  
Transfer Coefficient ◽  
Thermal Performance ◽  
Numerical Study ◽  
Thermal Design ◽  
Shell Side ◽  
Tube Heat Exchanger ◽  
Shell And Tube

This paper aims to enhance the thermal performance of an industrial shell-and-tube heat exchanger utilized for the purpose of cooling raw natural gas by means of mixture of Sales gas. The main objective of this work is to provide an optimum and reliable thermal design of a single-shelled finned tubes heat exchanger to replace the existing two- shell and tube heat exchanger due to the space limitations in the plant. A comprehensive thermal model was developed using the effectiveness-NTU method. The shell-side and tube-side overall heat transfer coefficient were determined using Bell-Delaware method and Dittus-Boelter correlation, respectively. The obtained results showed that the required area to provide a thermal duty of 1.4 MW is about 1132 m2 with tube-side and shell-side heat transfer coefficients of 950 W/m2K and 495 W/m2K, respectively. In order to verify the obtained results generated from the mathematical model, a numerical study was carried out using HTRI software which showed a good match in terms of the heat transfer area and the tube-side heat transfer coefficient.

Thermal performance of a single U-tube ground heat exchanger: A parametric study

2021 ◽  
Vol 28 (11) ◽  
pp. 3580-3598
Author(s):  
Seyed Soheil Mousavi Ajarostaghi ◽  
Hossein Javadi ◽  
Seyed Sina Mousavi ◽  
Sébastien Poncet ◽  
Mohsen Pourfallah
Keyword(s):  
Heat Exchanger ◽  
Thermal Performance ◽  
Parametric Study ◽  
Ground Heat Exchanger

scholarly journals Thermal performance of shallow spiral-tube ground heat exchanger for ground-source cooling system

2019 ◽  
Vol 619 ◽  
pp. 012012
Author(s):  
Jalaluddin ◽  
Akio Miyara ◽  
Rustan Tarakka ◽  
Andi Amijoyo Mochtar ◽  
IR Muhammad Anis
Keyword(s):  
Heat Exchanger ◽  
Thermal Performance ◽  
Cooling System ◽  
Ground Heat Exchanger ◽  
Spiral Tube ◽  
Ground Source
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