Banca de DEFESA: LIS DA SILVA OSTIGARD

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : LIS DA SILVA OSTIGARD
DATA : 16/12/2019
HORA: 14:00
LOCAL: Auditório José Lourenço Costa
TÍTULO:

Heat Transfer Fluid Replacement Evaluation in Paraffins’
Hidrotreatment and Fractionation Unit

PALAVRAS-CHAVES:

Heat transfer fluid, simulation, nanofluids, paraffins, heat transfer

PÁGINAS: 108
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Química
SUBÁREA: Operações Industriais e Equipamentos para Engenharia Química
ESPECIALIDADE: Operações de Separação e Mistura
RESUMO:

Hot oil systems are used for the purpose of indirect heating or cooling in industrial
plants. A paraffin hidrotreatment and fractionation unit uses a hot oil system for
heating of process streams in four heat exchangers. The eutectic mixture of biphenyl
and diphenyl oxide is employed as heat transfer fluid since the beginning of plant’s
operation in the 1980’s. This industrial installation is part of Brazilian petroleum
refinery which processes 323,000 bbl/d.
This study evaluated three heat transfer fluids which are proposed as substitutes to
the synthetic oil used currently, one being paraffinic oil n-C 13 -C 18 (produced in the
industrial unit itself), the nanofluid of eutectic of biphenyl and diphenyl oxide and
copper particles at 6% by volume and the nanofluid of polydimethylsiloxane and
copper oxide at 6% by volume. The heat duty required by the system was calculated
software Petro-SIM ® (KBC-Yokogawa) by steady state simulations.
It was observed that the nanofluids did not provide the thermal energy required and
are not suitable for the industrial unit mentioned because the concentration of
suspended nanoparticles showed lower heat capacity and higher viscosity as
predominant effects to higher thermal conductivity.
The paraffinic oil reached the expected thermal performance and it is superior at
30.46% regarding to the capacity of absorb thermal energy when compared to the
heat transfer fluid currently used, however, an evaluation regarding to thermal

stability and oxidation of this oil should be carried out to verify compatibility with

temperature conditions of the heat transfer fluid system.

The economic evaluation demonstrated that by using the paraffinic oil is expected to
save the amount spent of 2.64 million of purchasing hot oil and will eliminate
expenses related to waste treatment equivalent to R$ 147,600.00 every six years of
operation of the industrial installation.

MEMBROS DA BANCA:
Presidente - 1091039 - SILVANA MATTEDI E SILVA
Interno - 1287677 - REGINA FERREIRA VIANNA
Externo à Instituição - LUCIENNE LOBATO ROMANIELO - UFU