Effects of using PCM and non‐Newtonian power law nanofluid on different sides of a double pipe heat exchanger for phase change dynamics and energy performance improvements

2021 ◽  
Author(s):  
Fatih Selimefendigil ◽  
Hakan F. Öztop
Keyword(s):  
Heat Exchanger ◽  
Phase Change ◽  
Power Law ◽  
Energy Performance ◽  
Performance Improvements ◽  
Change Dynamics ◽  
Double Pipe ◽  
Power Law Nanofluid ◽  
Pipe Heat

Numerical Simulation of Phase Change Thermal Storage in Finned Double-Pipe Heat Exchanger

2012 ◽  
Vol 232 ◽  
pp. 742-746 ◽  
Author(s):  
H. Shokouhmand ◽  
B. Kamkari
Keyword(s):  
Numerical Simulation ◽  
Natural Convection ◽  
Heat Exchanger ◽  
Phase Change ◽  
Phase Change Material ◽  
Numerical Investigations ◽  
Double Pipe ◽  
Change Material ◽  
Pipe Heat ◽  
Bare Tube

This paper presents numerical investigations on melting of phase change material using paraffin wax inside a double pipe heat exchanger. Numerical simulations are performed for melting of phase change material (PCM) in annulus while the inner pipe has two or four longitudinal fins and the results compared with inner bare tube. The aim of this study is to understand the PCM melting behaviors by observing the natural convection currents movement and melting fronts formation. It is concluded that melting performance of PCM can be significantly improved by applying longitudinal fins on the inner tube.

scholarly journals Experimental Investigation of the Horizontal Double Pipe Heat Exchanger Utilized Phase Change Material

2020 ◽  
Vol 671 ◽  
pp. 012148
Author(s):  
Wisam A. Dukhan ◽  
Nabeel S. Dhaidan ◽  
Tahseen A. Al-Hattab
Keyword(s):  
Experimental Investigation ◽  
Heat Exchanger ◽  
Phase Change ◽  
Phase Change Material ◽  
Double Pipe ◽  
Change Material ◽  
Pipe Heat

Numerical study of nanoencapsulated phase change material inside double pipe heat exchanger

2019 ◽  
Vol 48 (8) ◽  
pp. 3466-3476 ◽  
Author(s):  
Armin Iranfar ◽  
Alireza Saraei
Keyword(s):  
Heat Exchanger ◽  
Phase Change ◽  
Phase Change Material ◽  
Numerical Study ◽  
Double Pipe ◽  
Change Material ◽  
Pipe Heat

scholarly journals Solid-liquid phase change investigation through a double pipe heat exchanger dealing with time-dependent boundary conditions

2018 ◽  
Vol 128 ◽  
pp. 725-736 ◽  
Author(s):  
Mohammad Taghilou ◽  
Ali M. Sefidan ◽  
Atta Sojoudi ◽  
Suvash C. Saha
Keyword(s):  
Heat Exchanger ◽  
Liquid Phase ◽  
Boundary Conditions ◽  
Phase Change ◽  
Time Dependent ◽  
Double Pipe ◽  
Solid Liquid ◽  
Pipe Heat

Performance of Phase Change Materials in a Horizontal Annulus of a Double-Pipe Heat Exchanger in a Water-Circulating Loop

2006 ◽  
Vol 129 (3) ◽  
pp. 265-272 ◽  
Author(s):  
J. R. Balikowski ◽  
J. C. Mollendorf
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Heat Exchanger ◽  
Phase Change ◽  
Heat Transfer Rate ◽  
Transfer Rate ◽  
Phase Change Materials ◽  
Water Flows ◽  
Double Pipe ◽  
Pipe Heat

Phase change materials (PCMs) are used in applications where temperature regulation is important because they absorb and release a large amount of energy at a fixed temperature. In the experimental part of this investigation, PCM was placed in the annular region of a double-pipe heat exchanger with water circulated in the inside pipe. Experiments were performed in which the PCM would absorb (charge) and then release (discharge) energy at various temperatures and water flows. Two materials, Climsel 28 (C28) by Climator and microencapsulated Thermasorb 83 (TY83) by Outlast Technologies, were each tested in smooth and spined annuli to observe which configuration facilitated heat transfer. The latent heats and thermal conductivities of C28 and TY83 are 126kJ∕kg and 186kJ∕kg and 0.6W∕m∕°C and 0.15W∕m∕°C, respectively. The experimental data were analyzed to verify which PCM transferred more heat. The effect of different water flow rates on the heat transfer rate was also examined. In the theoretical part of this investigation, heat transfer theory was applied to C28 in the smooth-piped heat exchanger in order to better understand the phase change process. The presence of spined fins in the phase change material accelerated charging and discharging due to increased fin contact with the outer layers of the PCM. The spined heat exchanger charged and discharged in 180min and 120min, respectively, whereas the temperature in the smooth heat exchanger remained below the fully charged/fully discharged asymptote by about 3°C and thus failed to fully charge or fully discharge. Also, higher water flows increased heat transfer between the PCM and water. TY83 in the spined heat exchanger transferred more heat and did it faster than C28 in the spined heat exchanger. The heat transfer rate from the water to TY83 while charging was 25% greater during the transient period than in C28. While discharging, the heat transfer from TY83 to the water was about 20% greater than in C28. There was generally good agreement (±1.5°C) between theory and experimental data of C28 in the smooth-piped heat exchanger in terms of the trends of the temperature responses. The differences are expected to be a result of approximations in boundary conditions and uncertainties in how the temperature variation of the specific heat is formulated.

Experimental Investigation of Relative Performance of Water Based TiO2 and ZnO Nanofluids in a Double Pipe Heat Exchanger

2015 ◽  
Vol 5 (1) ◽  
pp. 6-11
Author(s):  
Ramaraju Ramgopal Varma ◽  
◽  
Veeredhi Vasudeva Rao ◽  
Keyword(s):  
Experimental Investigation ◽  
Heat Exchanger ◽  
Relative Performance ◽  
Water Based ◽  
Double Pipe ◽  
Zno Nanofluids ◽  
Pipe Heat
Sign in / Sign up

Export Citation Format

Share Document