Effect of direct evaporative cooling during the charging process of phase change material based storage system for building free cooling application—A real time experimental investigation

2017 ◽  
Vol 152 ◽  
pp. 250-263 ◽  
Author(s):  
Karthik Panchabikesan ◽  
Antony Aroul Raj V. ◽  
Sujatha Abaranji ◽  
Pandiyarajan Vellaichamy ◽  
Velraj Ramalingam
Keyword(s):  
Experimental Investigation ◽  
Phase Change ◽  
Real Time ◽  
Phase Change Material ◽  
Storage System ◽  
Evaporative Cooling ◽  
Direct Evaporative Cooling ◽  
Free Cooling ◽  
Change Material

Experimental investigation of free cooling using phase change material-filled air heat exchanger for energy efficiency in buildings

2016 ◽  
Vol 12 (2) ◽  
pp. 139-149 ◽  
Author(s):  
Thambidurai Muthuvelan ◽  
Karthik Panchabikesan ◽  
Rajagopal Munisamy ◽  
Krishna Mohan Nibhanupudi ◽  
Velraj Ramalingam
Keyword(s):  
Energy Efficiency ◽  
Experimental Investigation ◽  
Heat Exchanger ◽  
Phase Change ◽  
Phase Change Material ◽  
Free Cooling ◽  
Change Material

EXPERIMENTAL INVESTIGATION OF PERFORMANCE IMPROVEMENT OF HOUSEHOLD REFRIGERATOR USING PHASE CHANGE MATERIAL

2013 ◽  
Vol 21 (04) ◽  
pp. 1350029 ◽  
Author(s):  
MD. IMRAN HOSSEN KHAN ◽  
HASAN M. M. AFROZ
Keyword(s):  
Heat Transfer ◽  
Experimental Investigation ◽  
Melting Point ◽  
Phase Change ◽  
Phase Change Material ◽  
Performance Improvement ◽  
Thermal Load ◽  
Storage System ◽  
Refrigeration Cycle ◽  
Change Material

An experimental investigation has been carried out to know about the performance improvement of a household refrigerator using phase change material (PCM). PCMs are used as latent heat thermal storage system to enhance the heat transfer of the evaporator. PCM is located behind the five sides of the evaporator cabinet in which the evaporator coil is immersed. Water (melting point 0°C) and Eutectic solutions (melting point −5°C) are used as PCMs for this experiment at different thermal loads. Depending on the types of PCM and thermal load, around 20–27% COP improvement of the refrigeration cycle has been observed with PCM with respect to without PCM. With the increase of the quantity of PCM (0.003 to 0.00425 m3) COP increases about 6%. Between two different PCMs the COP improvement for Eutectic solution is higher than Water. The experimental results with PCM confirm that, depending on the thermal load and the types of PCM average compressor running time per cycle is reduced significantly and it is found about 2–36% as compared to without PCM.

Experimental investigation on phase change material based thermal storage system for solar air heating applications

Solar Energy ◽  
2013 ◽  
Vol 88 ◽  
pp. 144-153 ◽  
Author(s):  
S. Esakkimuthu ◽  
Abdel Hakim Hassabou ◽  
C. Palaniappan ◽  
Markus Spinnler ◽  
Jurgen Blumenberg ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Phase Change ◽  
Phase Change Material ◽  
Storage System ◽  
Thermal Storage ◽  
Air Heating ◽  
Change Material

Thermal Energy Storage Through Melting of a Commercial Phase Change Material in an Annulus with Radially Divergent Longitudinal Fins

2020 ◽  
Vol 7 (1) ◽  
Author(s):  
Tonny Tabassum Mainul Hasan ◽  
Latifa Begum
Keyword(s):  
Energy Storage ◽  
Phase Change ◽  
Phase Change Material ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Storage System ◽  
Operating Conditions ◽  
Melting Time ◽  
Bottom Part ◽  
Change Material

This study reports on the unsteady two-dimensional numerical investigations of melting of a paraffin wax (phase change material, PCM) which melts over a temperature range of 8.7oC. The PCM is placed inside a circular concentric horizontal-finned annulus for the storage of thermal energy. The inner tube is fitted with three radially diverging longitudinal fins strategically placed near the bottom part of the annulus to accelerate the melting process there. The developed CFD code used in Tabassum et al., 2018 is extended to incorporate the presence of fins. The numerical results show that the average Nusselt number over the inner tube surface, the total melt fraction, the total stored energy all increased at every time instant in the finned annulus compared to the annulus without fins. This is due to the fact that in the finned annulus, the fins at the lower part of the annulus promotes buoyancy-driven convection as opposed to the slow conduction melting that prevails at the bottom part of the plain annulus. Fins with two different heights have been considered. It is found that by extending the height of the fin to 50% of the annular gap about 33.05% more energy could be stored compared to the bare annulus at the melting time of 82.37 min for the identical operating conditions. The effects of fins with different heights on the temperature and streamfunction distributions are found to be different. The present study can provide some useful guidelines for achieving a better thermal energy storage system.

scholarly journals Intensifying the Charging Response of a Phase-Change Material with Twisted Fin Arrays in a Shell-And-Tube Storage System

Energies ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1619
Author(s):  
Mohammad Ghalambaz ◽  
Hayder I. Mohammed ◽  
Jasim M. Mahdi ◽  
Amir Hossein Eisapour ◽  
Obai Younis ◽  
...  
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Storage System ◽  
Heating Surface ◽  
Superior Performance ◽  
Three Dimensional Model ◽  
Reference Case ◽  
Storage Rate ◽  
Shell And Tube ◽  
Change Material

A twisted-fin array as an innovative structure for intensifying the charging response of a phase-change material (PCM) within a shell-and-tube storage system is introduced in this work. A three-dimensional model describing the thermal management with charging phase change process in PCM was developed and numerically analyzed by the enthalpy-porosity method using commercial CFD software. Efficacy of the proposed structure of fins for performing better heat communication between the active heating surface and the adjacent layers of PCM was verified via comparing with conventional longitudinal fins within the same design limitations of fin material and volume usage. Optimization of the fin geometric parameters including the pitch, number, thickness, and the height of the twisted fins for superior performance of the proposed fin structure, was also introduced via the Taguchi method. The results show that a faster charging rate, higher storage rate, and better uniformity in temperature distribution could be achieved in the PCMs with Twisted fins. Based on the design of twisted fins, it was found that the energy charging time could be reduced by up to 42%, and the energy storage rate could be enhanced up to 63% compared to the reference case of straight longitudinal fins within the same PCM mass limitations.

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