Dalhousie Repository

NUMERICAL STUDY OF THE EFFECTS OF FINS AND THERMAL FLUID VELOCITIES ON THE STORAGE CHARACTERISTICS OF A CYLINDRICAL LATENT HEAT ENERGY STORAGE SYSTEM

DalSpace/Manakin Repository

Show simple item record

dc.contributor.author Ogoh, Wilson
dc.date.accessioned 2010-09-15T15:51:02Z
dc.date.available 2010-09-15T15:51:02Z
dc.date.issued 2010-09-15
dc.identifier.uri http://hdl.handle.net/10222/13076
dc.description.abstract This thesis work presents a numerical study of the effects of fins and thermal fluid velocities on the storage characteristics of a cylindrical latent heat energy storage system (LHESS). The work consists of two main components: 1. The development of a numerical method to study and solve the phase change heat transfer problems encountered in a LHESS during charging of the system, which results in melting of the phase change material (PCM). The numerical model is based on the finite element method. The commercial software COMSOL Multiphysics was used to implement it. The effective heat capacity method was applied in order to account for the large amount of latent energy stored during melting of a PCM, and the moving interface between the solid and liquid phases. The fluid flow, heat transfer and phase change processes were all validated using known analytical solutions or correlations. 2. Due to the low thermal conductivity of PCMs, the heat transfer characteristics of an enhanced LHESS was studied numerically. The effects of fins and the thermal fluid velocity on the melting rate of the PCM in the LHESS were analyzed. Results obtained for configurations having between 0 and 27 fins show that the heat transfer rate increases with addition of fins and thermal fluid velocity. The effect of the HTF velocity was observed to be small with few fin configurations since the thermal resistance offered by the LHESS system, mostly PCM, is vastly more important under these conditions; while its effect becomes more pronounced with addition of fins, since the overall thermal resistance decreases greatly with the addition of fins. The total energy stored after 12 hours for 0 and 27 fins configurations range between 3.6 MJ and 39.7 MJ for a thermal fluid velocity of 0.05 m/s and between 3.7 MJ and 57 MJ for a thermal fluid velocity of 0.5 m/s. The highest system efficiencies for the 0.05 m/s and 0.5 m/s, obtained with 27 fins configuration are 68.9% and 97.9% respectively. en_US
dc.language.iso en en_US
dc.subject Finite Element, Phase Change Material, Latent Heat Energy Storage and Heat Transfer Fluid en_US
dc.title NUMERICAL STUDY OF THE EFFECTS OF FINS AND THERMAL FLUID VELOCITIES ON THE STORAGE CHARACTERISTICS OF A CYLINDRICAL LATENT HEAT ENERGY STORAGE SYSTEM en_US
dc.date.defence 2010-07-27
dc.contributor.department Department of Mechanical Engineering en_US
dc.contributor.degree Master of Applied Science en_US
dc.contributor.external-examiner Dr. Noureddine Ben-Abdallah en_US
dc.contributor.graduate-coordinator Dr. Alex Kalamkarov en_US
dc.contributor.thesis-reader Dr. Peter Allen and Dr. Noureddine Ben-Abdallah en_US
dc.contributor.thesis-supervisor Dr. Dominic Groulx en_US
dc.contributor.ethics-approval Not Applicable en_US
dc.contributor.manuscripts Not Applicable en_US
dc.contributor.copyright-release Not Applicable en_US


Files in this item

This item appears in the following Collection(s)

Show simple item record