title: Heat Transfer Enhancement in Heat Recovery Loops Using Nanofluids as the Intermediate Fluid

authors: Tarighaleslami, Amir Hossein

abstract: In this paper, the effect of replacing water with various nanofluids as the heat transfer media in an industrial Heat Recovery Loop (HRL) have been modelled. Generally, nanofluids are prepared by distributing a nanoparticle through a base fluid such as water. Suspended nanoparticles slightly affect the thermal and physical properties of the base fluid. Primarily nanoparticles are added to improve the fluid’s heat transfer characteristics by increasing its Reynolds number and thermal conductivity. Results show that by applying various HRL design methods and a nanofluid as an intermediate fluid, an increase in heat recovery is possible without the need for extra heat exchanger area and infrastructure. With the addition of 1.5 vol.% CuO nanoparticles to the HRL fluid using constant temperature storage method, heat recovery from liquid-liquid heat exchangers increases between 5 % and 9 %. In the case of air-liquid exchangers, the air-side heat transfer coefficient limits the impact of using a nanofluid. In other cases, the duty available from the process stream, such as a condenser, significantly restricts the heat transfer benefit of using a nanofluid. Alternative to increasing heat recovery, results show that applying a nanofluid in the HRL design phase enables heat exchanger area to decrease significantly for liquid-liquid matches.

text: Heat Transfer Enhancement in Heat Recovery Loops Using Nanofluids as the Intermediate Fluid In this paper, the effect of replacing water with various nanofluids as the heat transfer media in an industrial Heat Recovery Loop (HRL) have been modelled. Generally, nanofluids are prepared by distributing a nanoparticle through a base fluid such as water. Suspended nanoparticles slightly affect the thermal and physical properties of the base fluid. Primarily nanoparticles are added to improve the fluid’s heat transfer characteristics by increasing its Reynolds number and thermal conductivity. Results show that by applying various HRL design methods and a nanofluid as an intermediate fluid, an increase in heat recovery is possible without the need for extra heat exchanger area and infrastructure. With the addition of 1.5 vol.% CuO nanoparticles to the HRL fluid using constant temperature storage method, heat recovery from liquid-liquid heat exchangers increases between 5 % and 9 %. In the case of air-liquid exchangers, the air-side heat transfer coefficient limits the impact of using a nanofluid. In other cases, the duty available from the process stream, such as a condenser, significantly restricts the heat transfer benefit of using a nanofluid. Alternative to increasing heat recovery, results show that applying a nanofluid in the HRL design phase enables heat exchanger area to decrease significantly for liquid-liquid matches.

year: 2015-08-27

title: Intentional Parenthood: responsibilities in surrogate motherhood

authors: van Zyl, Liezl

subjects: children’s rights

abstract: In recent years, a number of writers dealingwith questions over parenthood that arisein the context of reproductive technologies andsurrogate motherhood, have appealed to thenotion of ``intentional parenthood''. Basingtheir argument on liberal values such asindividual autonomy, the freedom to entercontracts, the right to privacy, and individualself-fulfilment, they argue that contractuallystated intentions, rather than genetic orgestational relationships, should form thebasis of parental rights. Against this I arguethat parental rights do not derive fromcontractual agreements, but are based in theirobligations towards the child. I then examinethe nature of the obligations that the variousparties have towards the child both pre- andpostnatally.

text: Intentional Parenthood: responsibilities in surrogate motherhood In recent years, a number of writers dealingwith questions over parenthood that arisein the context of reproductive technologies andsurrogate motherhood, have appealed to thenotion of ``intentional parenthood''. Basingtheir argument on liberal values such asindividual autonomy, the freedom to entercontracts, the right to privacy, and individualself-fulfilment, they argue that contractuallystated intentions, rather than genetic orgestational relationships, should form thebasis of parental rights. Against this I arguethat parental rights do not derive fromcontractual agreements, but are based in theirobligations towards the child. I then examinethe nature of the obligations that the variousparties have towards the child both pre- andpostnatally.

year: 2002

title: Bite

authors: Mitchell, Tori

subjects: poetry

abstract: Bite is a collection of blunt confessional poetry draped in honesty, identity, and 21st century feminism, examined through lived experience with eating disorders, sexuality, trauma, disconnect from family and culture, love and loss, and what it means to be a girl growing up. The collection explores these raw concepts with vulnerability, through the eyes of ‘wolf girl’, in hopes that talking loudly about these topics will force the public to challenge the silence and stigma around them.  

This thesis was inspired by Maori Mythology, and all of the Polynesian poets who showed me how important it is for women of colour to share their stories and experiences. It was also influenced by feminist artists Jenny Holzer, Tracey Emin, and Barbara Kruger, whose art embodies the content of these poems in a literal way: freedom of expression, stripped bare and unflinching. The poetry in this collection is confronting, visceral, and filled with bite.

text: Bite Bite is a collection of blunt confessional poetry draped in honesty, identity, and 21st century feminism, examined through lived experience with eating disorders, sexuality, trauma, disconnect from family and culture, love and loss, and what it means to be a girl growing up. The collection explores these raw concepts with vulnerability, through the eyes of ‘wolf girl’, in hopes that talking loudly about these topics will force the public to challenge the silence and stigma around them.  

This thesis was inspired by Maori Mythology, and all of the Polynesian poets who showed me how important it is for women of colour to share their stories and experiences. It was also influenced by feminist artists Jenny Holzer, Tracey Emin, and Barbara Kruger, whose art embodies the content of these poems in a literal way: freedom of expression, stripped bare and unflinching. The poetry in this collection is confronting, visceral, and filled with bite.

year: 2020