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Solar Systems Applications in Cape Town

Solar Systems. Solar Systems Applications in Cape Town. Background: DmE projected impact of RE in 10 years is dismal (10 000 GWh/pa) Because it is judged against poor electric conversion efficiencies Solar water heating has been suggested to by-pass this shortcoming

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Solar Systems Applications in Cape Town

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  1. Solar Systems Solar Systems Applications in Cape Town • Background: • DmE projected impact of RE in 10 years is dismal (10 000 GWh/pa) • Because it is judged against poor electric conversion efficiencies • Solar water heating has been suggested to by-pass this shortcoming • Highest impact however would be on peak demand losses on ESKOM grid • Cape Town have ambitious target of 10 000 solar heaters (by 2010) • Objectives: • Impact of solar heaters on grid peak demand • Projections of energy and line loss savings on a nationwide application

  2. Solar Systems Case Study: Blombos Pilot Solar Water Pumping • Background: • Blombos lies about 300 km on Cape Town’s west coast • Farm needs: water pumping • Commercial system cost: R33k • Approach: • Used latest state of the art equipment - not archaic solar maps! • Used wind to advantage: raised the panel up • Outputs: • Solar panel driven pump system • Farmer had more water than needed! • Cost of R13k (40 % of original spec!) • Comments: • Over-design ignorance increases costs • Need to move away from obsolete methods • Additional White LED installation for ultra-low power lighting

  3. Solar Systems Optimization of Solar Water Pumping System using Genetic Algorithms Scope: • Development of algorithms • Collection experimental results • Simulation • Modifications

  4. Solar Systems • Pump type: SOLASTAR positive displacement pump for low head applications (< 100 m) • Maximum Power Point Tracking is provided by an algorithm that monitors potential and current from the pv array. • System simulations for: • Motor • Pv array • Optimisation: • Analysis of conduction losses • Power dissipations • Other circuitry losses

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