Thermal investigation of spiral cooled glass reactor
| dc.contributor.advisor | Nagy, Miklós | |
| dc.contributor.author | Arif, Hira | |
| dc.contributor.department | DE--Természettudományi és Technológiai Kar--Kémiai Intézet | hu_HU |
| dc.date.accessioned | 2019-11-21T13:59:04Z | |
| dc.date.available | 2019-11-21T13:59:04Z | |
| dc.date.created | 2019-11-19 | |
| dc.description.abstract | In this thesis,thermal behavior of reactor is investigated and the parameter fitted curve of Chemcad’s results (grey) over the reactor’s cooling (blue) curves shows very good agreement. However, the manual calculations resulted in 0.17 L/min while the Chemcad’s calculations yielded for 0.62 kg/min. This seemingly large difference can be attributed to the heat loss through the reactor wall, with which we did not calculate and Chemcad possibly did. Although most part of reactor was insulated with polyurethane but heat loss most likely to occurred from the uninsulated top part of reactor and long pipe connecting to thermostat. Another fact was obtained for plotting a graph for different values of volumetric flow rates to changing overall heat transfer coefficient values, that the heat transfer would reach a maximum value after that increasing the flowrate would not have any effect on. This point was indicated in figure 12.3. approximately at 0.5 L/min. The same behavior was noticed when the graph for heat transfer rate for inner side of coil was plotted against the volumetric flowrate as the heat transfer rate is proportional to overall heat transfer coefficient according to heat balance. The heat loss can be reduced by better insulation and by choosing more efficient insulating material. The distance could be reduced from thermostat and reactor by using short pipes instead of longer one and thermostat should be placed near the reactor. In manual calculations 100% efficiency was assumed and heat losses from the reactor to environment as well as the disturbances from environment were also ignored. In Chemcad, the calculations included the heat losses and disturbances. Therefore, the Chemcad’s values are different from manual calculations. In mathematical model, the laminar flow was found out as Reynolds’ number is 4 which is quite impossible for a flow to be turbulent in spiral coil. The lower limit of linear velocity for turbulent flow is 1 m/s and whereas the linear velocity was calculated is ~10-2 m/s which justifies this lower limit fact. Hence, the smaller the heat transfer coefficient, the smaller the Overall heat transfer coefficient. It signifies that heat transfer is not efficient with 0.17 L/min flowrate. The flowrate can be increased by installing a better pumping system, thus increasing the Reynolds’ number, using the lower density liquids. | hu_HU |
| dc.description.corrector | gj | |
| dc.description.course | Chemical Engineering | hu_HU |
| dc.description.degree | BSc/BA | hu_HU |
| dc.format.extent | 35 | hu_HU |
| dc.identifier.uri | http://hdl.handle.net/2437/276633 | |
| dc.language.iso | en | hu_HU |
| dc.subject | Glass spiral reactor | hu_HU |
| dc.subject | heat exchange | |
| dc.subject | Chemcad | |
| dc.subject | mathematical model | |
| dc.subject.dspace | DEENK Témalista::Kémia | hu_HU |
| dc.title | Thermal investigation of spiral cooled glass reactor | hu_HU |