A comparative study and analysis of PHES and UGPHES systems.
Khan, Shiraz Yusuf.
MetadataShow full item record
Underground Pumped Hydroelectric Energy Storage (UGPHES) is a similar energy storage concept to the conventional Pumped Hydroelectric Energy Storage (PHES) with the major difference being that the lower reservoir is in an underground cavern system. Electricity is stored in the form of gravitational potential energy between a surface reservoir and an underlying subterranean reservoir. In this study, various existing energy storage systems are examined with the UGPHES introduced as an alternative technology for bulk energy storage in South Africa to contribute to the constrained electricity network with environmental and economic benefits. The use of existing infrastructure for the implementation of UGPHES systems is explored, which includes the use of aquifers and abandoned mines. South Africa has large amounts of groundwater as well as transboundary aquifers which may be used for UGPHES systems. A mathematical model is presented which highlights the considerations for the implementation of an aquifer UGPHES system including head and aquifer transmissivity. The use of abandoned mines in South Africa is also explored as it presents an existing underground cavern as well as large amounts of groundwater. Finally, a mathematical model is presented to provide an analysis of the water hammer phenomenon as well as an economic analysis for the use of abandoned mines for UGPHES systems.
Showing items related by title, author, creator and subject.
An investigation of the efficiency of the receiver of a solar thermal cooker with thermal energy storage. Heilgendorff, Heiko Martin. (2015-01-05)A small scale solar concentrator cooker with a thermal energy storage system was designed, constructed and tested on the roof of the Physics building at UKZN, Westville campus (GPS co-ordinates: -29.817897, 30.942771) ...
Sulaiman, Abdulsalam S. A. (2008)Large percentages of the South African population have no access to grid power and are located at distances that make provision for such facility uneconomical. Also traditional fuels are under pressure. Most areas in ...
Govender, Paulene. (2015-01-05)One of the key components in a solar thermal cooker system is the receiver since the performance of the receiver greatly affects the entire system. Absorption of the maximum amount of reflected radiation is crucial for ...