The development of boiler control models for the optimization of boiler efficiency
- Authors: Kellerman, Andre
- Date: 2016
- Subjects: Boilers Boiler-making industry , Steam-boilers Mechatronics Power electronics
- Language: English
- Type: Thesis , Masters , MEng
- Identifier: http://hdl.handle.net/10948/48014 , vital:40463
- Description: With Eskom’s fleet rapidly reaching end of life and maintenance outages becoming more frequent, it has become more critical to be able to determine transient effects of auxiliary losses and system responses due to instabilities. A low mono-nitrogen oxide (low-NOx) burner replacement project has recently been completed at Camden power station in Ermelo. It has thus deemed itself as a perfect candidate for a model which can be used to understand the new systems’ response during transient scenarios. The aim is to develop a boiler control model to be used for simulation of various process conditions and failure scenarios in order to predict the boiler plants’ behaviour and improve its availability. Research was done on common boiler control practices and modelling of boiler control. A theoretical boiler control model was developed based on the Camden power station’s control system specification. The computational model of the boiler control was implemented in Flownex® simulation environment, which was found to be particular useful for modelling industrial applications. A number of simulations with the computational model were performed and the results were compared against the historic plant data showing good correlation. In parallel, a thermo-fluid model of the boiler was developed using Flownex® by a Masters student at the University of Cape Town, which was then integrated with the control model. The combined Flownex model was used for simulation of the following important cases: a mill trip, a Forced Draught fan trip and load changes. The obtained results show good correlation with the real plant data, indicating that the developed computational model can be considered accurate for Camden’s particular type of boiler and its control. Hence, it is envisaged that the developed combined Flownex model can be applied for simulation of the boilers of the Camden power station.
- Full Text:
- Date Issued: 2016
- Authors: Kellerman, Andre
- Date: 2016
- Subjects: Boilers Boiler-making industry , Steam-boilers Mechatronics Power electronics
- Language: English
- Type: Thesis , Masters , MEng
- Identifier: http://hdl.handle.net/10948/48014 , vital:40463
- Description: With Eskom’s fleet rapidly reaching end of life and maintenance outages becoming more frequent, it has become more critical to be able to determine transient effects of auxiliary losses and system responses due to instabilities. A low mono-nitrogen oxide (low-NOx) burner replacement project has recently been completed at Camden power station in Ermelo. It has thus deemed itself as a perfect candidate for a model which can be used to understand the new systems’ response during transient scenarios. The aim is to develop a boiler control model to be used for simulation of various process conditions and failure scenarios in order to predict the boiler plants’ behaviour and improve its availability. Research was done on common boiler control practices and modelling of boiler control. A theoretical boiler control model was developed based on the Camden power station’s control system specification. The computational model of the boiler control was implemented in Flownex® simulation environment, which was found to be particular useful for modelling industrial applications. A number of simulations with the computational model were performed and the results were compared against the historic plant data showing good correlation. In parallel, a thermo-fluid model of the boiler was developed using Flownex® by a Masters student at the University of Cape Town, which was then integrated with the control model. The combined Flownex model was used for simulation of the following important cases: a mill trip, a Forced Draught fan trip and load changes. The obtained results show good correlation with the real plant data, indicating that the developed computational model can be considered accurate for Camden’s particular type of boiler and its control. Hence, it is envisaged that the developed combined Flownex model can be applied for simulation of the boilers of the Camden power station.
- Full Text:
- Date Issued: 2016
Determining the impact of leadership on the success of entrepreneurs
- Authors: Mtshibe, Nomaswazi
- Date: 2013
- Subjects: Leadership , Success in business , Entrepreneurship -- Management
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8920 , http://hdl.handle.net/10948/d1021108
- Description: The Eastern Cape Province has been cited as the second poorest province in South Africa. The impact of entrepreneurship on the economy, with respect to socio-economic development, has placed increased pressure on entrepreneurs to operate effectively. Moreover, entrepreneurs are required to adopt and adapt to leadership practices that lead to business success. Business success is largely dependent on the leader. The importance of this study may, thus, be attributed to the need for entrepreneurs to possess the necessary leadership attributes for the efficient running of a business. The primary objective of this study was to improve the success rate of entrepreneurs in the Eastern Cape Province. This was done by determining the impact of selected leadership attributes on the success of entrepreneurs. More specifically, this study investigated how the success of entrepreneurs is influenced by leadership attributes (the dependent variable), namely, leadership style, vision, networking, risk-taking and ethics (the independent variables). In order to achieve the research objectives, the researcher used the inferential statistical approach, specifically, hypothesis testing. The first step was to conduct a literature review on factors that influence entrepreneurs. This entailed the barriers to success, critical success factors, the impact of the SMME sector on the economy, as well as the selected leadership attributes. Secondly, the quantitative research method was used to assess the perceptions of entrepreneurs with regards to the influence of the leadership attributes on their businesses. This was done through an empirical survey, namely a self-administered questionnaire that was distributed to a sample of 100 entrepreneurs who are based in the Eastern Cape Province and have been operating for a minimum of three years. Out of the envisaged 100 respondents, 89 questionnaires were completed (89% response rate). The data obtained from the empirical survey was then analysed statistically and the descriptive statistics were presented by using graphs and tables. The results of the empirical survey revealed that although all the above-mentioned independent variables contribute towards increasing the success rate of entrepreneurs, networking and ethics exert the most significant influence. Based on the findings of the literature review and the results of the empirical survey, this study made recommendations on areas of improvement for entrepreneurs in order to increase their success rate. Suggestions were also made for possible future research.
- Full Text:
- Date Issued: 2013
- Authors: Mtshibe, Nomaswazi
- Date: 2013
- Subjects: Leadership , Success in business , Entrepreneurship -- Management
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8920 , http://hdl.handle.net/10948/d1021108
- Description: The Eastern Cape Province has been cited as the second poorest province in South Africa. The impact of entrepreneurship on the economy, with respect to socio-economic development, has placed increased pressure on entrepreneurs to operate effectively. Moreover, entrepreneurs are required to adopt and adapt to leadership practices that lead to business success. Business success is largely dependent on the leader. The importance of this study may, thus, be attributed to the need for entrepreneurs to possess the necessary leadership attributes for the efficient running of a business. The primary objective of this study was to improve the success rate of entrepreneurs in the Eastern Cape Province. This was done by determining the impact of selected leadership attributes on the success of entrepreneurs. More specifically, this study investigated how the success of entrepreneurs is influenced by leadership attributes (the dependent variable), namely, leadership style, vision, networking, risk-taking and ethics (the independent variables). In order to achieve the research objectives, the researcher used the inferential statistical approach, specifically, hypothesis testing. The first step was to conduct a literature review on factors that influence entrepreneurs. This entailed the barriers to success, critical success factors, the impact of the SMME sector on the economy, as well as the selected leadership attributes. Secondly, the quantitative research method was used to assess the perceptions of entrepreneurs with regards to the influence of the leadership attributes on their businesses. This was done through an empirical survey, namely a self-administered questionnaire that was distributed to a sample of 100 entrepreneurs who are based in the Eastern Cape Province and have been operating for a minimum of three years. Out of the envisaged 100 respondents, 89 questionnaires were completed (89% response rate). The data obtained from the empirical survey was then analysed statistically and the descriptive statistics were presented by using graphs and tables. The results of the empirical survey revealed that although all the above-mentioned independent variables contribute towards increasing the success rate of entrepreneurs, networking and ethics exert the most significant influence. Based on the findings of the literature review and the results of the empirical survey, this study made recommendations on areas of improvement for entrepreneurs in order to increase their success rate. Suggestions were also made for possible future research.
- Full Text:
- Date Issued: 2013
Determining the impact of leadership on the success of entrepreneurs
- Authors: Mtshibe, Nomaswazi
- Date: 2013
- Subjects: Leadership , Success in business
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8852 , http://hdl.handle.net/10948/d1020126
- Description: The Eastern Cape Province has been cited as the second poorest province in South Africa. The impact of entrepreneurship on the economy, with respect to socio-economic development, has placed increased pressure on entrepreneurs to operate effectively. Moreover, entrepreneurs are required to adopt and adapt to leadership practices that lead to business success. Business success is largely dependent on the leader. The importance of this study may, thus, be attributed to the need for entrepreneurs to possess the necessary leadership attributes for the efficient running of a business. The primary objective of this study was to improve the success rate of entrepreneurs in the Eastern Cape Province. This was done by determining the impact of selected leadership attributes on the success of entrepreneurs. More specifically, this study investigated how the success of entrepreneurs is influenced by leadership attributes (the dependent variable), namely, leadership style, vision, networking, risk-taking and ethics (the independent variables). In order to achieve the research objectives, the researcher used the inferential statistical approach, specifically, hypothesis testing. The first step was to conduct a literature review on factors that influence entrepreneurs. This entailed the barriers to success, critical success factors, the impact of the SMME sector on the economy, as well as the selected leadership attributes. Secondly, the quantitative research method was used to assess the perceptions of entrepreneurs with regards to the influence of the leadership attributes on their businesses. This was done through an empirical survey, namely a self-administered questionnaire that was distributed to a sample of 100 entrepreneurs who are based in the Eastern Cape Province and have been operating for a minimum of three years. Out of the envisaged 100 respondents, 89 questionnaires were completed (89% response rate). The data obtained from the empirical survey was then analysed statistically and the descriptive statistics were presented by using graphs and tables. The results of the empirical survey revealed that although all the above-mentioned independent variables contribute towards increasing the success rate of entrepreneurs, networking and ethics exert the most significant influence. Based on the findings of the literature review and the results of the empirical survey, this study made recommendations on areas of improvement for entrepreneurs in order to increase their success rate. Suggestions were also made for possible future research.
- Full Text:
- Date Issued: 2013
- Authors: Mtshibe, Nomaswazi
- Date: 2013
- Subjects: Leadership , Success in business
- Language: English
- Type: Thesis , Masters , MBA
- Identifier: vital:8852 , http://hdl.handle.net/10948/d1020126
- Description: The Eastern Cape Province has been cited as the second poorest province in South Africa. The impact of entrepreneurship on the economy, with respect to socio-economic development, has placed increased pressure on entrepreneurs to operate effectively. Moreover, entrepreneurs are required to adopt and adapt to leadership practices that lead to business success. Business success is largely dependent on the leader. The importance of this study may, thus, be attributed to the need for entrepreneurs to possess the necessary leadership attributes for the efficient running of a business. The primary objective of this study was to improve the success rate of entrepreneurs in the Eastern Cape Province. This was done by determining the impact of selected leadership attributes on the success of entrepreneurs. More specifically, this study investigated how the success of entrepreneurs is influenced by leadership attributes (the dependent variable), namely, leadership style, vision, networking, risk-taking and ethics (the independent variables). In order to achieve the research objectives, the researcher used the inferential statistical approach, specifically, hypothesis testing. The first step was to conduct a literature review on factors that influence entrepreneurs. This entailed the barriers to success, critical success factors, the impact of the SMME sector on the economy, as well as the selected leadership attributes. Secondly, the quantitative research method was used to assess the perceptions of entrepreneurs with regards to the influence of the leadership attributes on their businesses. This was done through an empirical survey, namely a self-administered questionnaire that was distributed to a sample of 100 entrepreneurs who are based in the Eastern Cape Province and have been operating for a minimum of three years. Out of the envisaged 100 respondents, 89 questionnaires were completed (89% response rate). The data obtained from the empirical survey was then analysed statistically and the descriptive statistics were presented by using graphs and tables. The results of the empirical survey revealed that although all the above-mentioned independent variables contribute towards increasing the success rate of entrepreneurs, networking and ethics exert the most significant influence. Based on the findings of the literature review and the results of the empirical survey, this study made recommendations on areas of improvement for entrepreneurs in order to increase their success rate. Suggestions were also made for possible future research.
- Full Text:
- Date Issued: 2013
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