0000002399 00000 n Constant specific heat 8. The design of the. in Heat Transfer". Pearson/Prentice Hall, 2005. micropump consists of three horizontal inlet channels and one vertical outlet channel. As part of my 3rd year Computational Fluid Dynamics (CFD) module, I was tasked with designing a cross flow heat exchanger, using CFD, capable of providing 1.5 m3/min of water at 55C for a Combined Heat & Power (CHP) plant building heating system. In present work, a side single injection at higher temperature will be issued to a pipe fluid flow at lower temperature. Burlington: Elsevier Science, 2012. A quick inspection was done to make sure the equipment is in a proper working, condition. H��U]hU���i���4�$M�p�M$��$�M�v�OB~ZB�E��Nw'�m��v�]P(J�B�b�OA��}DԷ�/"}k��Q������bcT��Ν�;�s{@ NAC��dO�h>�=5S�J�j�J �����ܨ��:�"�03�4=�r�p��GS����A�M`Ó�)*�A� �w��Ss��Ϻ?� ���L� ���ʖs��YmX|D���7��?�up��R6gf�n\k�� ��+��pc��]�j�n!�tK)5''i�Uw_�T���Z� ��>�Ėҏ���%�{xY$q ��;0�~lC'�ш ���=�v[��5qI\������N؞��Տz��o0�������j���viR rEh�j�JIK밿��B=�bKOh�pc�q��uYb�o=R��1�G��ȧz�+X"�ׂ�_[ � [�K*ead�%���#�2��xQ��MZfh���ꂿwQc�Q=ֹrw�����%�[,�5���a�Q����������g����^t���Z�^���R�g�~Y�[��� e~J EP��"uK%�N9�6�#�����Gہ-�M�. Computational fluid dynamics is a sensational field in designing. Abraham, and John M. Gorman. For parallel flow, also known as co-current flow, both, the hot and cold fluids flow in the same direction. To understand the basic operation of heat exchangers. FINAL REPORT . pipe spacing, angle of attack) independently and later used the best performing designs, of each factor, in devising a closed 3D solution to the problem. Print. When the liquid velocity distribution was simulated, particle trajectories were traced on the basis of a Lagrangian frame considering the hydrodynamic interactions between liquid and particles. Three different channel width designs were manufactured successfully and tested at various piezo-triggered frequencies. 215-16. 0000000928 00000 n These steps were repeated for different combinations of flow rate FT1 and FT2 as, as the experiment begins. Join ResearchGate to find the people and research you need to help your work. Finally, the equipment was shut, The specific results for this experiment allow us to determine the heat transfers, heat. These steps, were repeated for different combinations of flow rate FT1 and FT2 as recorded under, the tables below. Still the variation with tip gap size is predicted well by some of the investigated models. n.d. Web. All the valves are made sure to be initially closed except V2 and V12. Heat exchanger description 2. Keeping the dimensionless velocity ratio and dimensionless diameter ratio constant, only the upstream size and orientation will be varied. The velocity and pressure distributions in the hydrocyclones were simulated, Feasible designs are accomplished by fastening ties with the advancement in computing technology. Academia.edu is a platform for academics to share research papers. Considering the separation efficiency, pressure drop, and particle cut-size simultaneously, Types B-II and C-II were the optimal designs. 0000004903 00000 n x�b```f``���������ˀ �@1V �X������p��ϣ��{=`�c����U uJK��߹D0�e�w�K�=\K7��d����ݤ��k�fN�,G���g\{x́�ۢ�z�2:%::�B;::@Ɓ8J`���$�@�h� ��e`Xv.�(�A>|Wdb�a`�r��p�WP�a1� Douglas, John F. "Chapter 6 (Section 6.6)." �h)SZ~\��*+Ei%��p�&`�Tۀ��Y(g�rZG����R��rUS8 �ܓJ^��OmM?5�5����^������z��m=4���h��|J�e�ipOL�TBy�A�[A?X�3Vel�ʩP���ݳ7/������A��C�}0�ox� �0ӣ-W��E��{�w�z����tSӧjl6�újj���+�a��h�(o�H=�^�g"��n�.�q���Dp��r� ePd`2��͸�� Its numerical modeling will be performed. ����0� The Type A vortex finders had uniform but different thicknesses, and the Types B and C had extra conical shapes with different lengths on the outer surfaces. From the data collected, we found out that configuration of Shell and, Tube heat exchanger in counter current flow has a higher effectiveness than the co-. A drain hose was connected, to the cold water drain point. The particle separation efficiencies observed using the different hydrocyclones were compared at an inlet velocity of 10 m/s and a split ratio of 0.6. In-Situ Shipboard Heat Exchanger Cleaning . Momar Seck exchanger is to either remove heat from a hot fluid or to add heat to the cold fluid. and Maintenance Using Innovative I 2 Bubble . 0000002475 00000 n However, although the design was analysed and adjusted for any discrepancies between the CFD approximation and the real world part, the design brief lacked a number of real world specification, which would have lead to a more accurate design. A thicker vortex finder resulted in higher particle separation efficiency because a higher velocity is maintained in the cylindrical part, but it also resulted in reduced particle residence time and an increased pressure drop through the hydrocyclone. Installing conical structures on the outer surface of the vortex finders was beneficial for improving the particle separation efficiency and reducing the particle cut-size. All, the results are tabulated under the tables below. This giv es the amoun t of heat transferred betw een the oil in the pi p es and the w ater, it is assumed there © 2008-2020 ResearchGate GmbH. startxref Due to the good consistency between LDA and numerical results, the conclusions are considered to be valid for stage designs similar to the ones analyzed. The valve was, closed once the tank is full. %%EOF <<5bd21a161e98f347b2459858c03fa5a7>]>> Heat transfer rate is the rate of heat energy transferred through a surface area. Pump P1 and P2 were switch off when the experiment complete. current as the experiment begins. 44 0 obj<>stream ESTCP Project WP - 201219 . In conclusion, I successfully designed a heat exchanger capable of heating water at room temperature to 55C (328.15K)using CFD simulation. 0000000016 00000 n Then, the main power and the heater for the hot water, were switched on. Vortex Shedding. " Both the fluids enter and exit the, heat exchanger on the same ends. Laminar, Transitional or Turbulent Flow. Engineering Thermodynamics Work & Heat Transfer - Third Edition, Unshrouded Rotor Tip Clearance Effects in Expander Cycle Turbines, Designing Vortex Finder Structure for Improving the Particle Separation Efficiency of a Hydrocyclone, INVESTIGATIONS OF EFFECTIVENESS OF VERTICLE UPSTREAM ON DOWNSTREAM OF INJECTION IN PIPELINE. BACKGROUND A heat exchanger is a heat transfer device whose purpose is the transfer of energy from one moving fluid stream to another moving fluid stream. The absolute loss level found in CFD simulations differs significantly from what is expected when using loss correlations. As dependency of tip clearance losses on stage velocity triangles is considered, none of the tested correlations gives results consistent with the numerical simulations. The use of standard correlations ‘beyond the limits’ is thus considered to introduce high uncertainty. A two-component LDA system allowed for measurements of axial and tangential velocity components at varying depth (radius) in the flow channel, Measurements thus correspond to a full plane at constant axial position in the rotating frame of reference of the rotor. mapping of the velocity field downstream the rotor on a representative turbine stage. Experiment regarding heat exchanger- concurrent/countercurrent flows at same rate and different rates. A more free-flowing cooler means that there is less mechanical stress on the CAC electric pumps. Harlow, England: In this experiment, we study only the, parallel flow and counter flow. The cold water tank was, and the valve was left opened for continues water supply. 0000006185 00000 n Shape deposition manufacturing (SDM) process, a layered manufacturing technique involving repeated material deposition and removal, was used to manufacture the chamber and channels of the micropump. Effectiveness 5. Gene Griffin. NAVFAC Engineering and Expeditionary Warfare Center . The direction of fluid motion inside the heat exchanger can normally categorised as, parallel flow, counter flow and cross flow.