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A Study on CFD Analysis to Investigate the Effects of Different Feed Rate into the High Temperature H2SO4 Transferring Pump at Fixed Frequency
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 Title & Authors
A Study on CFD Analysis to Investigate the Effects of Different Feed Rate into the High Temperature H2SO4 Transferring Pump at Fixed Frequency
Choi, Jung-Sik; Choi, Jae-Hyuk;
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 Abstract
In this study, to apply hydrogen energy to ship engine and to generate effective hydrogen production, we investigated the effects of high temperature feed rate and cooling water rate to pump parts with fixed frequency needed to reciprocate motion and a simulation was conducted at each condition. In the fixed frequency and cooling water inlet flow rate of 0.5 Hz and 3.9 kg/s, we changed the high temperature flow rate to 47.46 kg/s (it is 105 % of 45.2 kg/s), 49.72 kg/s (110 %), and 51.98 kg/s (115 %). Also, at 0.5 Hz and 45.2 kg/s of frequency and high temperature flow, the thermal hydraulic analysis was performed at the condition of 95 % (3.705 kg/s), 90 % (3.51 kg/s), and 85 % (3.315 kg/s). In overall simulation cases, the physical properties of materials are more influential to the temperature increase in the pump part rather than the changes on the feed rate of high temperature and cooling water. A continuous operation of pump was also capable even if the excess feed of high temperature of about 15 % or the less feed of cooling water of about 15 % were performed, respectively. When the increasing feed of high temperature of up to 5 %, 10 %, and 15 % were compared with base flow (45.2 kg/s), the deviation of time period rose to a certain temperature and ranged from 0 to 4.5 s in the same position (same material). In case of cooling water, the deviation of time period rose to a certain temperature and ranged from 0 to 5.9 s according to the decreasing feed changes of cooling water at 5 %, 10 %, and 15 % compared to a base flow (3.9 kg/s). Finally, the additional researches related to the two different materials (Teflon and STS for Pitch and End-plate), which are concerned about the effects of temperature changes to the parts contacting different materials, are needed, and we have a plan to conduct a follow-up study.
 Keywords
High efficiency hydrogen production;SI (sulfuric-iodine) Thermochemical cycle;Environmental friendly ship;Transportation pump for high temperature ;Fixed frequency;
 Language
English
 Cited by
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