Application of project management methodologies in the execution of medical gases installations to improve synergy within South African hospitals
- Authors: Nyambe, B.G.S.
- Date: 2018
- Subjects: Project management , Medical instruments and apparatus industry , Gases - Therapeutic use , Low temperature engineering , Gas pipelines
- Language: English
- Type: Masters (Thesis)
- Identifier: http://hdl.handle.net/10210/284694 , uj:30758
- Description: Abstract: This minor dissertation studies the application of project management methodologies in the execution of medical gases installations within South African hospitals. This was done in order to improve synergy during the execution of the medical gases installation with the rest of the hospital build programme. Medical gases installation in general as a gas reticulation system is made up of a combination of equipment that together or as individually are used to transmit medical gases for medicinal use in hospitals. These are gases that are regarded as life supporting within the hospital operations. They are not only used for healing or curing diseases but are used to support processes/machines that perform such functions. The installations are expected to be designed, installed and commissioned to meet the minimum requirements of SANS 7396-1/2, SANS 10260, EIGA guides and SANS 347-PER. South African National Standards (SANS) 7396 part 1 deals with the pipeline system for compressed medical gases and vacuum and part 2 deals with Anaesthetic gas scavenging disposal system. SANS 10260 deals with the supply and storage of cryogenic gases in South Africa, HTM and EIGA describes the general scientific considerations of gas behaviour and what to consider during designing of a safe gas system. The supplied gas is produced as a cryogenic gas in a liquid form from atmospheric air through an air separation unit process of distillation. It is however packaged in a vapour form in cylinders or directly in a bulk liquid storage tank and using a vaporizer is converted into vapour. According to SANS requirements, three sources of supply are required for each gas reticulation supply system in a hospital. Medical gases installations by their nature are projects and should follow project management doctrines in order to execute them in a manner that is acceptable and satisfies customer requirements. According to PMBOK, a project is not a fixed endeavour that gets to be undertaken, it is a short term activity that is aimed to create a unique product, service or end result. As this principle applies with the type of installations carried out in supplying and installing reticulation systems that transmit medical gases to the hospitals point of use such as theatres, ICU’s, wards etc. As result of the nature of the medical gases reticulation system, the study aims to bring to the sector project management principles to ensure this critical task is always executed safely and within acceptable best practice. , M.Phil. (Engineering Management)
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- Authors: Nyambe, B.G.S.
- Date: 2018
- Subjects: Project management , Medical instruments and apparatus industry , Gases - Therapeutic use , Low temperature engineering , Gas pipelines
- Language: English
- Type: Masters (Thesis)
- Identifier: http://hdl.handle.net/10210/284694 , uj:30758
- Description: Abstract: This minor dissertation studies the application of project management methodologies in the execution of medical gases installations within South African hospitals. This was done in order to improve synergy during the execution of the medical gases installation with the rest of the hospital build programme. Medical gases installation in general as a gas reticulation system is made up of a combination of equipment that together or as individually are used to transmit medical gases for medicinal use in hospitals. These are gases that are regarded as life supporting within the hospital operations. They are not only used for healing or curing diseases but are used to support processes/machines that perform such functions. The installations are expected to be designed, installed and commissioned to meet the minimum requirements of SANS 7396-1/2, SANS 10260, EIGA guides and SANS 347-PER. South African National Standards (SANS) 7396 part 1 deals with the pipeline system for compressed medical gases and vacuum and part 2 deals with Anaesthetic gas scavenging disposal system. SANS 10260 deals with the supply and storage of cryogenic gases in South Africa, HTM and EIGA describes the general scientific considerations of gas behaviour and what to consider during designing of a safe gas system. The supplied gas is produced as a cryogenic gas in a liquid form from atmospheric air through an air separation unit process of distillation. It is however packaged in a vapour form in cylinders or directly in a bulk liquid storage tank and using a vaporizer is converted into vapour. According to SANS requirements, three sources of supply are required for each gas reticulation supply system in a hospital. Medical gases installations by their nature are projects and should follow project management doctrines in order to execute them in a manner that is acceptable and satisfies customer requirements. According to PMBOK, a project is not a fixed endeavour that gets to be undertaken, it is a short term activity that is aimed to create a unique product, service or end result. As this principle applies with the type of installations carried out in supplying and installing reticulation systems that transmit medical gases to the hospitals point of use such as theatres, ICU’s, wards etc. As result of the nature of the medical gases reticulation system, the study aims to bring to the sector project management principles to ensure this critical task is always executed safely and within acceptable best practice. , M.Phil. (Engineering Management)
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Performance analysis of a travelling-wave looped tube thermo-acoustic engine
- Authors: Balonji, Serge
- Date: 2018
- Subjects: Heat engineering , Heat-engines - Thermodynamics , Refrigerators , Heat - Transmission , Low temperature engineering
- Language: English
- Type: Masters (Thesis)
- Identifier: http://hdl.handle.net/10210/280505 , uj:30143
- Description: M.Tech. (Mechanical Engineering) , Abstract: The present study focuses on analysing the performance of a travelling-wave looped-tube thermo-acoustic engine. The introduction of thermo-acoustic theories has provided a path for the technology to be developed further, in an attempt to replace the conventional refrigeration systems, power production and other pollutant energy production systems in the future. The thermo-acoustic field is becoming one of the emerging technologies dealing with conversion of energies. The earth population is growing faster for the planet to sustain its consumption and for the environment to control the pollution. Our home refrigerators are ones of appliances contributing to the pollution of the environment by their toxic coolants and their lubricants. Burning of fossils to produce electricity is another way of contributing to the pollution. Thermo-acoustic device show potential alternative on reducing air pollution. It can be driven by wasted heat, has no toxic coolant and does not require the use of lubricant. Because of these advantages and many others, thermo-acoustic devices are attracting more attention from researchers. However the technology is still in its developing stage because of the currents limitations related to the performance of existing models. Thermo-acoustic engine convert heat into a sound wave. Previous studies have searched ways and means to improve thermo-acoustic devices performance. Some have chosen to optimise the length and the configuration of the resonator; others have focussed on the gases and their mixtures; while number of researchers has focussed on the materials and configuration of the stack or regenerator, described as the heart of the devices. In the present, study we have pointed out the effect of the variation of some crucial parameters on the performance of thermo-acoustic devices. A travelling-wave thermo-acoustic engine was designed using numerical approximation provided by a modelling code DELTAEC (Design Environment for Low-amplitude Thermo-Acoustic Energy Conversion). The design developed focuses, in particular, on the effects of different ceramic substrate configurations (diameter, length, porosity and position) on the performance of the device. Meaningful comparison on the effect of the ceramic substrates configuration is provided in order to predict the performance of the device. In addition, guidance on the identification and the selection of the best geometrical configurations of ceramic substrates have been provided. The results obtained from the DELTAEC simulation were used to design and build a hermetically sealed travelling-wave thermo-acoustic engine using low cost materials. The device was able to...
- Full Text:
- Authors: Balonji, Serge
- Date: 2018
- Subjects: Heat engineering , Heat-engines - Thermodynamics , Refrigerators , Heat - Transmission , Low temperature engineering
- Language: English
- Type: Masters (Thesis)
- Identifier: http://hdl.handle.net/10210/280505 , uj:30143
- Description: M.Tech. (Mechanical Engineering) , Abstract: The present study focuses on analysing the performance of a travelling-wave looped-tube thermo-acoustic engine. The introduction of thermo-acoustic theories has provided a path for the technology to be developed further, in an attempt to replace the conventional refrigeration systems, power production and other pollutant energy production systems in the future. The thermo-acoustic field is becoming one of the emerging technologies dealing with conversion of energies. The earth population is growing faster for the planet to sustain its consumption and for the environment to control the pollution. Our home refrigerators are ones of appliances contributing to the pollution of the environment by their toxic coolants and their lubricants. Burning of fossils to produce electricity is another way of contributing to the pollution. Thermo-acoustic device show potential alternative on reducing air pollution. It can be driven by wasted heat, has no toxic coolant and does not require the use of lubricant. Because of these advantages and many others, thermo-acoustic devices are attracting more attention from researchers. However the technology is still in its developing stage because of the currents limitations related to the performance of existing models. Thermo-acoustic engine convert heat into a sound wave. Previous studies have searched ways and means to improve thermo-acoustic devices performance. Some have chosen to optimise the length and the configuration of the resonator; others have focussed on the gases and their mixtures; while number of researchers has focussed on the materials and configuration of the stack or regenerator, described as the heart of the devices. In the present, study we have pointed out the effect of the variation of some crucial parameters on the performance of thermo-acoustic devices. A travelling-wave thermo-acoustic engine was designed using numerical approximation provided by a modelling code DELTAEC (Design Environment for Low-amplitude Thermo-Acoustic Energy Conversion). The design developed focuses, in particular, on the effects of different ceramic substrate configurations (diameter, length, porosity and position) on the performance of the device. Meaningful comparison on the effect of the ceramic substrates configuration is provided in order to predict the performance of the device. In addition, guidance on the identification and the selection of the best geometrical configurations of ceramic substrates have been provided. The results obtained from the DELTAEC simulation were used to design and build a hermetically sealed travelling-wave thermo-acoustic engine using low cost materials. The device was able to...
- Full Text:
Determination of the ductile to brittle transition temperature of Austempered ductile iron
- Bhero, Shepherd, Mathabathe, Maria
- Authors: Bhero, Shepherd , Mathabathe, Maria
- Date: 2014
- Subjects: Alloys , Iron founding , DBTT of ADI , Low temperature engineering
- Type: Article
- Identifier: uj:5092 , http://hdl.handle.net/10210/13682
- Description: Austempered ductile iron (ADI) is a relatively new material that is increasingly finding space in industrial application. ADI possesses a unique combination of hardness and toughness that is not typical of most ferrous materials, where an increase in strength is invariably accompanied by a decrease in toughness and vice versa. Although the superiority of ADI is well documented in literature, there is still widespread scepticism application because not all properties are well known. This paper aims to determine the ductile to brittle transition temperature (DBTT) of ADI in order to establish its suitability for cryogenic applications.
- Full Text:
- Authors: Bhero, Shepherd , Mathabathe, Maria
- Date: 2014
- Subjects: Alloys , Iron founding , DBTT of ADI , Low temperature engineering
- Type: Article
- Identifier: uj:5092 , http://hdl.handle.net/10210/13682
- Description: Austempered ductile iron (ADI) is a relatively new material that is increasingly finding space in industrial application. ADI possesses a unique combination of hardness and toughness that is not typical of most ferrous materials, where an increase in strength is invariably accompanied by a decrease in toughness and vice versa. Although the superiority of ADI is well documented in literature, there is still widespread scepticism application because not all properties are well known. This paper aims to determine the ductile to brittle transition temperature (DBTT) of ADI in order to establish its suitability for cryogenic applications.
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