Design, implementation and evaluation of a directly water cooled photovoltaic- thermal system
- Authors: Mtunzi, Busiso
- Date: 2013
- Subjects: Sensitivity analysis -- Photovoltaic thermal system (PV/T) , Solar utilization -- Carbon emission
- Language: English
- Type: Thesis , Doctoral , PhD (Physics)
- Identifier: vital:11597 , http://hdl.handle.net/10353/d1016198 , Sensitivity analysis -- Photovoltaic thermal system (PV/T) , Solar utilization -- Carbon emission
- Description: This research project was based on the Design, Implementation and Evaluation of a Photovoltaic Water heating system in South Africa, Eastern Cape Province. The purpose of the study was to design and investigate the scientific and economic contribution of direct water cooling on the photovoltaic module. The method involved performance comparison of two photovoltaic modules, one naturally cooled (M1) and the other, direct water cooled module (M2). Module M2 was used to produce warm water and electricity, hence, a hybrid system. The study focused on comparing the modules’ efficiency, power output and their performance. The temperatures attained by water through cooling the module were monitored as well as the electrical energy generated. A data logger and a low cost I/V characteristic system were used for data collection for a full year. The data were then used for performance analysis of the modules. The results of the study revealed that the directly water cooled module could operate at a higher electrical efficiency for 87% of the day and initially produced 3.63% more electrical energy each day. This was found to be true for the first three months after installation. In the remaining months to the end of the year M2 was found to have more losses as compared to M1 as evidenced by the modules’ performance ratios. The directly water cooled module also showed an energy saving efficiency of 61%. A solar utilization of 47.93% was found for M2 while 8.77% was found for M1. Economically, the project was found to be viable and the payback period of the directly cooled module (M2) system was found to be 9.8 years. Energy economics showed that the system was more sensitive to the price changes and to the energy output as compared to other inputs such as operation and maintenance and years of operation. A generation cost of R0.84/kWh from the system was found and when compared to the potential revenue of R1.18 per kWh, the system was found to enable households to make a profit of 40.5 %. Use of such a system was also found to be able to contribute 9.55% towards carbon emission reduction each year. From these results, it was concluded that a directly cooled photovoltaic/thermal heating (PV/T) system is possible and that it can be of much help in terms of warm water and electricity provision.
- Full Text:
- Date Issued: 2013
- Authors: Mtunzi, Busiso
- Date: 2013
- Subjects: Sensitivity analysis -- Photovoltaic thermal system (PV/T) , Solar utilization -- Carbon emission
- Language: English
- Type: Thesis , Doctoral , PhD (Physics)
- Identifier: vital:11597 , http://hdl.handle.net/10353/d1016198 , Sensitivity analysis -- Photovoltaic thermal system (PV/T) , Solar utilization -- Carbon emission
- Description: This research project was based on the Design, Implementation and Evaluation of a Photovoltaic Water heating system in South Africa, Eastern Cape Province. The purpose of the study was to design and investigate the scientific and economic contribution of direct water cooling on the photovoltaic module. The method involved performance comparison of two photovoltaic modules, one naturally cooled (M1) and the other, direct water cooled module (M2). Module M2 was used to produce warm water and electricity, hence, a hybrid system. The study focused on comparing the modules’ efficiency, power output and their performance. The temperatures attained by water through cooling the module were monitored as well as the electrical energy generated. A data logger and a low cost I/V characteristic system were used for data collection for a full year. The data were then used for performance analysis of the modules. The results of the study revealed that the directly water cooled module could operate at a higher electrical efficiency for 87% of the day and initially produced 3.63% more electrical energy each day. This was found to be true for the first three months after installation. In the remaining months to the end of the year M2 was found to have more losses as compared to M1 as evidenced by the modules’ performance ratios. The directly water cooled module also showed an energy saving efficiency of 61%. A solar utilization of 47.93% was found for M2 while 8.77% was found for M1. Economically, the project was found to be viable and the payback period of the directly cooled module (M2) system was found to be 9.8 years. Energy economics showed that the system was more sensitive to the price changes and to the energy output as compared to other inputs such as operation and maintenance and years of operation. A generation cost of R0.84/kWh from the system was found and when compared to the potential revenue of R1.18 per kWh, the system was found to enable households to make a profit of 40.5 %. Use of such a system was also found to be able to contribute 9.55% towards carbon emission reduction each year. From these results, it was concluded that a directly cooled photovoltaic/thermal heating (PV/T) system is possible and that it can be of much help in terms of warm water and electricity provision.
- Full Text:
- Date Issued: 2013
Perceptions of school principals on their role in the implementation of the national school nutrition programme: case of four school principals in the King William’s Town education district
- Authors: Paulos, Sibusiso Big-Boy
- Date: 2013
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: vital:16207 , http://hdl.handle.net/10353/d1016259
- Description: The purpose of the study was to look at the Perceptions of School Principals on their Role in the Implementation of the National School Nutrition Programme in the King Williams Town Education District. The areas that were deemed to be the most important in this regard were, (i) The role of principals in the implementation of the National School Nutrition Programme. Challenges faced by principals in the implementation of the National School Nutrition Programme. The views of principals on the training received for the implementation of the programme. Assistance provided to schools by the district offices. The study was situated in the interpretive paradigm which seeks to construct detailed descriptions of reality. Qualitative methods were employed for data collection purposes because they allow the use of interviews and document analysis for data collection. This was the most suitable method for the study which seeks to understand the perceptions of principals on their role in the implementation of the National School Nutrition Programme. The study found out that, there were a lot of positives with regard to the implementation of the programme and principals were satisfied with its positive impact on teaching and learning. However, principals raised serious concerns regarding some aspects of the programme such as, lack of infrastructure, budget constraints, lack of capacity of the School Nutrition Committees and food handlers. Also, the study revealed that, there is non-compliance by schools with the 10H00 feeding time, menu guidelines and five day feeding requirement of the programme. Furthermore, the study found out that, lack of training and support from the district offices were other challenges facing the programme. Community involvement was missing and this was having a negative impact on the implementation of the programme. The study recommends that, the department must embark on a mobilization drive to educate communities about the benefits of participating in the programme. It is further recommended that, the department should develop partnerships with other departments such as Social Development and Health, form partnerships with Universities, Non-Governmental Organisations and corporate businesses. This must be done so as to ensure that issues of lack of capacity and budgetary constraints are addressed. Furthermore, the study recommends that, the number of food handlers be increased and the department should ensure that budget allocations to schools are transferred on time. Training and monitoring should be consolidated through employment and training of district officials.
- Full Text:
- Date Issued: 2013
- Authors: Paulos, Sibusiso Big-Boy
- Date: 2013
- Language: English
- Type: Thesis , Masters , M Ed
- Identifier: vital:16207 , http://hdl.handle.net/10353/d1016259
- Description: The purpose of the study was to look at the Perceptions of School Principals on their Role in the Implementation of the National School Nutrition Programme in the King Williams Town Education District. The areas that were deemed to be the most important in this regard were, (i) The role of principals in the implementation of the National School Nutrition Programme. Challenges faced by principals in the implementation of the National School Nutrition Programme. The views of principals on the training received for the implementation of the programme. Assistance provided to schools by the district offices. The study was situated in the interpretive paradigm which seeks to construct detailed descriptions of reality. Qualitative methods were employed for data collection purposes because they allow the use of interviews and document analysis for data collection. This was the most suitable method for the study which seeks to understand the perceptions of principals on their role in the implementation of the National School Nutrition Programme. The study found out that, there were a lot of positives with regard to the implementation of the programme and principals were satisfied with its positive impact on teaching and learning. However, principals raised serious concerns regarding some aspects of the programme such as, lack of infrastructure, budget constraints, lack of capacity of the School Nutrition Committees and food handlers. Also, the study revealed that, there is non-compliance by schools with the 10H00 feeding time, menu guidelines and five day feeding requirement of the programme. Furthermore, the study found out that, lack of training and support from the district offices were other challenges facing the programme. Community involvement was missing and this was having a negative impact on the implementation of the programme. The study recommends that, the department must embark on a mobilization drive to educate communities about the benefits of participating in the programme. It is further recommended that, the department should develop partnerships with other departments such as Social Development and Health, form partnerships with Universities, Non-Governmental Organisations and corporate businesses. This must be done so as to ensure that issues of lack of capacity and budgetary constraints are addressed. Furthermore, the study recommends that, the number of food handlers be increased and the department should ensure that budget allocations to schools are transferred on time. Training and monitoring should be consolidated through employment and training of district officials.
- Full Text:
- Date Issued: 2013
Stock farmers and the state: a case study of animal healthcare practices in Hertzog Eastern Cape Province South Africa
- Authors: Jenjezwa, Vimbai Rachel
- Date: 2010
- Subjects: Agriculture and state -- South Africa -- Eastern Cape , Traditional veterinary medicine -- South Africa -- Eastern Cape , Animal health , Domestic animals -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc (Geography)
- Identifier: vital:11508 , http://hdl.handle.net/10353/269 , Agriculture and state -- South Africa -- Eastern Cape , Traditional veterinary medicine -- South Africa -- Eastern Cape , Animal health , Domestic animals -- South Africa -- Eastern Cape
- Description: The animal healthcare practices of most communal farmers involve the use of both conventional and ethnoveterinary medicines. This study presents information on the animal healthcare practices of stock farmers in Hertzog, Eastern Cape Province, South Africa. It also presents the findings on the social, economic and political aspects surrounding animal healthcare. The research applied two theories namely structuration theory and the Context, Practice and Belief (CPB) framework. Interviews and participant observation were used to collect data. The communal farmers widely used conventional medicines however, proper administration methods were not followed. Ethnoveterinary medicines were used to prevent and treat disease, even by the younger stock farmers. The stock farmers used ethnoveterinary medicines mainly because of the lack of finance to purchase the conventional medicines, even though the latter was preferred. The stock farmers actively participated in state programmes but felt that they needed more state veterinarian visits and state provided medications because they could not afford private veterinarians and conventional medicines. Therefore, this study attempts to contribute to an understanding of the use of ethnoveterinary medicine and communal farmers’ animal healthcare practices.
- Full Text:
- Date Issued: 2010
- Authors: Jenjezwa, Vimbai Rachel
- Date: 2010
- Subjects: Agriculture and state -- South Africa -- Eastern Cape , Traditional veterinary medicine -- South Africa -- Eastern Cape , Animal health , Domestic animals -- South Africa -- Eastern Cape
- Language: English
- Type: Thesis , Masters , MSc (Geography)
- Identifier: vital:11508 , http://hdl.handle.net/10353/269 , Agriculture and state -- South Africa -- Eastern Cape , Traditional veterinary medicine -- South Africa -- Eastern Cape , Animal health , Domestic animals -- South Africa -- Eastern Cape
- Description: The animal healthcare practices of most communal farmers involve the use of both conventional and ethnoveterinary medicines. This study presents information on the animal healthcare practices of stock farmers in Hertzog, Eastern Cape Province, South Africa. It also presents the findings on the social, economic and political aspects surrounding animal healthcare. The research applied two theories namely structuration theory and the Context, Practice and Belief (CPB) framework. Interviews and participant observation were used to collect data. The communal farmers widely used conventional medicines however, proper administration methods were not followed. Ethnoveterinary medicines were used to prevent and treat disease, even by the younger stock farmers. The stock farmers used ethnoveterinary medicines mainly because of the lack of finance to purchase the conventional medicines, even though the latter was preferred. The stock farmers actively participated in state programmes but felt that they needed more state veterinarian visits and state provided medications because they could not afford private veterinarians and conventional medicines. Therefore, this study attempts to contribute to an understanding of the use of ethnoveterinary medicine and communal farmers’ animal healthcare practices.
- Full Text:
- Date Issued: 2010
Dumping, antidumping and the future prospects for fair international trade
- Authors: Zvidza, Tinevimbo
- Date: 2008
- Subjects: Dumping -- International trade -- International trade -- Fair trad , Foreign trade regulation -- International cooperation
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:11114 , http://hdl.handle.net/10353/100 , Dumping -- International trade -- International trade -- Fair trad , Foreign trade regulation -- International cooperation
- Description: More than a century has passed since Canada adopted the first antidumping law in 1904. Similar legislation in most of the major trading nations followed the Canadian legislation prior to and after the World War II. Antidumping provisions were later integrated into the General Agreement on Tariffs and Trade (GATT) after the said war. Today, nearly all developed and developing countries have this type of legislation in place within their municipal legal framework. The subject of antidumping has received growing attention in international trade policy and has become a source of tension between trading nations. This is evident in the substantial increase of antidumping actions since the establishment of the WTO. Antidumping policy has emerged as a significant trade barrier because of its misuse by both developed and developing countries. The primary instruments governing antidumping actions are GATT Article VI and the Antidumping Agreement (ADA). The ADA contains both the substantive and procedural rules governing the interpretation and application of the instrument. Its purpose is to ensure that the instrument is used only as a contingency measure judged upon merit and not as a disguised protectionist device. Given the growing number of countries participating more actively in the world trading system and the notorious misuse of antidumping provisions, there is a vital need to critically analyse the key provisions of the said instruments. This study is an attempt at that academic enterprise. It concludes by giving proposals for future reform of both real and potential future reform of the current WTO antidumping regime. Dumping, antidumping, antidumping regulation, antidumping duties, like products, dumping margin, zeroing, facts available, protectionism, ADA.
- Full Text:
- Date Issued: 2008
- Authors: Zvidza, Tinevimbo
- Date: 2008
- Subjects: Dumping -- International trade -- International trade -- Fair trad , Foreign trade regulation -- International cooperation
- Language: English
- Type: Thesis , Masters , LLM
- Identifier: vital:11114 , http://hdl.handle.net/10353/100 , Dumping -- International trade -- International trade -- Fair trad , Foreign trade regulation -- International cooperation
- Description: More than a century has passed since Canada adopted the first antidumping law in 1904. Similar legislation in most of the major trading nations followed the Canadian legislation prior to and after the World War II. Antidumping provisions were later integrated into the General Agreement on Tariffs and Trade (GATT) after the said war. Today, nearly all developed and developing countries have this type of legislation in place within their municipal legal framework. The subject of antidumping has received growing attention in international trade policy and has become a source of tension between trading nations. This is evident in the substantial increase of antidumping actions since the establishment of the WTO. Antidumping policy has emerged as a significant trade barrier because of its misuse by both developed and developing countries. The primary instruments governing antidumping actions are GATT Article VI and the Antidumping Agreement (ADA). The ADA contains both the substantive and procedural rules governing the interpretation and application of the instrument. Its purpose is to ensure that the instrument is used only as a contingency measure judged upon merit and not as a disguised protectionist device. Given the growing number of countries participating more actively in the world trading system and the notorious misuse of antidumping provisions, there is a vital need to critically analyse the key provisions of the said instruments. This study is an attempt at that academic enterprise. It concludes by giving proposals for future reform of both real and potential future reform of the current WTO antidumping regime. Dumping, antidumping, antidumping regulation, antidumping duties, like products, dumping margin, zeroing, facts available, protectionism, ADA.
- Full Text:
- Date Issued: 2008
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