| dc.contributor.author | Muhunzi, Amour | |
| dc.date.accessioned | 2021-09-22T12:23:52Z | |
| dc.date.available | 2021-09-22T12:23:52Z | |
| dc.date.issued | 2021-02 | |
| dc.identifier.uri | https://doi.org/10.58694/20.500.12479/1298 | |
| dc.description | A Dissertation Submitted in Partial Fulfillment of the Requirements for the Degree of
Master’s in Sustainable Energy Science and Engineering of the Nelson Mandela African
Institution of Science and Technology | en_US |
| dc.description.abstract | Numerical analysis for heat exchanger for spray-assisted low-temperature desalination system
is presented for an existing low-temperature desalination unit at Arusha Technical College
(ATC). The current desalination unit at ATC has two suction fans and a water pump in the
condensation unit where significant amount of energy is consumed. So, it will be impractical
to implement such a type of desalination system in remote areas where there is limited access
to electricity. The study aims to come up with a suitable model for the replacement of the
current condensation unit due to high energy consumption. The heat transfer phenomena have
been analyzed to understand the effect of mass flow rate, tube length and diameter in a shelland-tube
heat exchanger (STHX). A Math CAD model was developed using the Delaware
method to obtain the mentioned parameters. The results show that the pressure drop is very
low from all STHX configurations, while the heat transfer coefficient seems to be maximum
in the smallest diameter within the largest tube length heat exchanger. The maximum possible
energy will be extracted by the STHX from the steam while it condenses. According to the
results, as long as over-design is considered the proposed system can be implemented with the
minimum effect of 5.968 to 10.688 kWh energy consumption. The energy-saving of the
proposed system is about 8.856 kWh as the replacement of the STHX from the existing
condensation unit. While the current system energy is consumed about 14.824 to 19.544 kWh
in a single day of operation. Also, the proposed system will improve the system workability to
the remote communities in future implementation. | en_US |
| dc.language.iso | en | en_US |
| dc.publisher | NM-AIST | en_US |
| dc.subject | Research Subject Categories::NATURAL SCIENCES | en_US |
| dc.title | Enhancing the performance of a spray flash evaporation integrated with evacuated tube desalination system | en_US |
| dc.type | Thesis | en_US |
